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_ONCE(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_ONCE(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 OBD_FAIL_RETURN(OBD_FAIL_OSC_BRW_PREP_REQ, -ENOMEM); /* Recoverable */
954 OBD_FAIL_RETURN(OBD_FAIL_OSC_BRW_PREP_REQ2, -EINVAL); /* Fatal */
956 if ((cmd & OBD_BRW_WRITE) != 0) {
958 pool = cli->cl_import->imp_rq_pool;
964 for (niocount = i = 1; i < page_count; i++) {
965 if (!can_merge_pages(pga[i - 1], pga[i]))
969 size[REQ_REC_OFF + 1] = sizeof(*ioobj);
970 size[REQ_REC_OFF + 2] = niocount * sizeof(*niobuf);
972 size[REQ_REC_OFF + 3] = sizeof(*capa);
974 req = ptlrpc_prep_req_pool(cli->cl_import, LUSTRE_OST_VERSION, opc, 5,
975 size, NULL, pool, NULL);
979 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
981 if (opc == OST_WRITE)
982 desc = ptlrpc_prep_bulk_imp (req, page_count,
983 BULK_GET_SOURCE, OST_BULK_PORTAL);
985 desc = ptlrpc_prep_bulk_imp (req, page_count,
986 BULK_PUT_SINK, OST_BULK_PORTAL);
988 GOTO(out, rc = -ENOMEM);
989 /* NB request now owns desc and will free it when it gets freed */
991 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
992 ioobj = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 1, sizeof(*ioobj));
993 niobuf = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
994 niocount * sizeof(*niobuf));
998 obdo_to_ioobj(oa, ioobj);
999 ioobj->ioo_bufcnt = niocount;
1001 capa = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 3,
1003 capa_cpy(capa, ocapa);
1004 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
1007 LASSERT (page_count > 0);
1008 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1009 struct brw_page *pg = pga[i];
1010 struct brw_page *pg_prev = pga[i - 1];
1012 LASSERT(pg->count > 0);
1013 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1014 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1015 pg->off, pg->count);
1017 LASSERTF(i == 0 || pg->off > pg_prev->off,
1018 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1019 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1021 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1022 pg_prev->pg, page_private(pg_prev->pg),
1023 pg_prev->pg->index, pg_prev->off);
1025 LASSERTF(i == 0 || pg->off > pg_prev->off,
1026 "i %d p_c %u\n", i, page_count);
1028 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1029 (pg->flag & OBD_BRW_SRVLOCK));
1031 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1033 requested_nob += pg->count;
1035 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1037 niobuf->len += pg->count;
1039 niobuf->offset = pg->off;
1040 niobuf->len = pg->count;
1041 niobuf->flags = pg->flag;
1045 LASSERT((void *)(niobuf - niocount) ==
1046 lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1047 niocount * sizeof(*niobuf)));
1048 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1050 /* size[REQ_REC_OFF] still sizeof (*body) */
1051 if (opc == OST_WRITE) {
1052 if (unlikely(cli->cl_checksum)) {
1053 body->oa.o_valid |= OBD_MD_FLCKSUM;
1054 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1057 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1059 /* save this in 'oa', too, for later checking */
1060 oa->o_valid |= OBD_MD_FLCKSUM;
1062 /* clear out the checksum flag, in case this is a
1063 * resend but cl_checksum is no longer set. b=11238 */
1064 oa->o_valid &= ~OBD_MD_FLCKSUM;
1066 oa->o_cksum = body->oa.o_cksum;
1067 /* 1 RC per niobuf */
1068 size[REPLY_REC_OFF + 1] = sizeof(__u32) * niocount;
1069 ptlrpc_req_set_repsize(req, 3, size);
1071 if (unlikely(cli->cl_checksum))
1072 body->oa.o_valid |= OBD_MD_FLCKSUM;
1073 /* 1 RC for the whole I/O */
1074 ptlrpc_req_set_repsize(req, 2, size);
1077 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1078 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1080 aa->aa_requested_nob = requested_nob;
1081 aa->aa_nio_count = niocount;
1082 aa->aa_page_count = page_count;
1086 INIT_LIST_HEAD(&aa->aa_oaps);
1092 ptlrpc_req_finished (req);
1096 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1097 __u32 client_cksum, __u32 server_cksum,
1098 int nob, obd_count page_count,
1099 struct brw_page **pga)
1104 if (server_cksum == client_cksum) {
1105 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1109 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE);
1111 if (new_cksum == server_cksum)
1112 msg = "changed on the client after we checksummed it - "
1113 "likely false positive due to mmap IO (bug 11742)";
1114 else if (new_cksum == client_cksum)
1115 msg = "changed in transit before arrival at OST";
1117 msg = "changed in transit AND doesn't match the original - "
1118 "likely false positive due to mmap IO (bug 11742)";
1120 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1121 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1122 "["LPU64"-"LPU64"]\n",
1123 msg, libcfs_nid2str(peer->nid),
1124 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1125 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1128 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1130 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1131 CERROR("original client csum %x, server csum %x, client csum now %x\n",
1132 client_cksum, server_cksum, new_cksum);
1136 /* Note rc enters this function as number of bytes transferred */
1137 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1139 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1140 const lnet_process_id_t *peer =
1141 &req->rq_import->imp_connection->c_peer;
1142 struct client_obd *cli = aa->aa_cli;
1143 struct ost_body *body;
1144 __u32 client_cksum = 0;
1147 if (rc < 0 && rc != -EDQUOT)
1150 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1151 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1152 lustre_swab_ost_body);
1154 CERROR ("Can't unpack body\n");
1158 /* set/clear over quota flag for a uid/gid */
1159 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1160 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA))
1161 lquota_setdq(quota_interface, cli, body->oa.o_uid,
1162 body->oa.o_gid, body->oa.o_valid,
1168 if (unlikely(aa->aa_oa->o_valid & OBD_MD_FLCKSUM))
1169 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1171 osc_update_grant(cli, body);
1173 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1175 CERROR ("Unexpected +ve rc %d\n", rc);
1178 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1180 if (unlikely((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) &&
1182 check_write_checksum(&body->oa, peer, client_cksum,
1184 aa->aa_requested_nob,
1189 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1192 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1193 aa->aa_page_count, aa->aa_ppga);
1197 /* The rest of this function executes only for OST_READs */
1198 if (rc > aa->aa_requested_nob) {
1199 CERROR("Unexpected rc %d (%d requested)\n", rc,
1200 aa->aa_requested_nob);
1204 if (rc != req->rq_bulk->bd_nob_transferred) {
1205 CERROR ("Unexpected rc %d (%d transferred)\n",
1206 rc, req->rq_bulk->bd_nob_transferred);
1210 if (rc < aa->aa_requested_nob)
1211 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1213 if (sptlrpc_cli_unwrap_bulk_read(req, rc, aa->aa_page_count,
1215 GOTO(out, rc = -EAGAIN);
1217 if (unlikely(body->oa.o_valid & OBD_MD_FLCKSUM)) {
1218 static int cksum_counter;
1219 __u32 server_cksum = body->oa.o_cksum;
1223 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1224 aa->aa_ppga, OST_READ);
1226 if (peer->nid == req->rq_bulk->bd_sender) {
1230 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1233 if (server_cksum == ~0 && rc > 0) {
1234 CERROR("Protocol error: server %s set the 'checksum' "
1235 "bit, but didn't send a checksum. Not fatal, "
1236 "but please tell CFS.\n",
1237 libcfs_nid2str(peer->nid));
1238 } else if (server_cksum != client_cksum) {
1239 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1240 "%s%s%s inum "LPU64"/"LPU64" object "
1241 LPU64"/"LPU64" extent "
1242 "["LPU64"-"LPU64"]\n",
1243 req->rq_import->imp_obd->obd_name,
1244 libcfs_nid2str(peer->nid),
1246 body->oa.o_valid & OBD_MD_FLFID ?
1247 body->oa.o_fid : (__u64)0,
1248 body->oa.o_valid & OBD_MD_FLFID ?
1249 body->oa.o_generation :(__u64)0,
1251 body->oa.o_valid & OBD_MD_FLGROUP ?
1252 body->oa.o_gr : (__u64)0,
1253 aa->aa_ppga[0]->off,
1254 aa->aa_ppga[aa->aa_page_count-1]->off +
1255 aa->aa_ppga[aa->aa_page_count-1]->count -
1257 CERROR("client %x, server %x\n",
1258 client_cksum, server_cksum);
1260 aa->aa_oa->o_cksum = client_cksum;
1264 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1267 } else if (unlikely(client_cksum)) {
1268 static int cksum_missed;
1271 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1272 CERROR("Checksum %u requested from %s but not sent\n",
1273 cksum_missed, libcfs_nid2str(peer->nid));
1279 *aa->aa_oa = body->oa;
1284 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1285 struct lov_stripe_md *lsm,
1286 obd_count page_count, struct brw_page **pga,
1287 struct obd_capa *ocapa)
1289 struct ptlrpc_request *req;
1293 struct l_wait_info lwi;
1297 cfs_waitq_init(&waitq);
1300 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1301 page_count, pga, &req, ocapa);
1305 rc = ptlrpc_queue_wait(req);
1307 if (rc == -ETIMEDOUT && req->rq_resend) {
1308 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1309 ptlrpc_req_finished(req);
1313 rc = osc_brw_fini_request(req, rc);
1315 ptlrpc_req_finished(req);
1316 if (osc_recoverable_error(rc)) {
1318 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1319 CERROR("too many resend retries, returning error\n");
1323 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1324 l_wait_event(waitq, 0, &lwi);
1332 int osc_brw_redo_request(struct ptlrpc_request *request,
1333 struct osc_brw_async_args *aa)
1335 struct ptlrpc_request *new_req;
1336 struct ptlrpc_request_set *set = request->rq_set;
1337 struct osc_brw_async_args *new_aa;
1338 struct osc_async_page *oap;
1342 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1343 CERROR("too many resend retries, returning error\n");
1347 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1349 body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
1350 if (body->oa.o_valid & OBD_MD_FLOSSCAPA)
1351 ocapa = lustre_unpack_capa(request->rq_reqmsg,
1354 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1355 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1356 aa->aa_cli, aa->aa_oa,
1357 NULL /* lsm unused by osc currently */,
1358 aa->aa_page_count, aa->aa_ppga,
1359 &new_req, NULL /* ocapa */);
1363 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1365 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1366 if (oap->oap_request != NULL) {
1367 LASSERTF(request == oap->oap_request,
1368 "request %p != oap_request %p\n",
1369 request, oap->oap_request);
1370 if (oap->oap_interrupted) {
1371 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1372 ptlrpc_req_finished(new_req);
1377 /* New request takes over pga and oaps from old request.
1378 * Note that copying a list_head doesn't work, need to move it... */
1380 new_req->rq_interpret_reply = request->rq_interpret_reply;
1381 new_req->rq_async_args = request->rq_async_args;
1382 new_req->rq_sent = CURRENT_SECONDS + aa->aa_resends;
1384 new_aa = (struct osc_brw_async_args *)&new_req->rq_async_args;
1386 INIT_LIST_HEAD(&new_aa->aa_oaps);
1387 list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1388 INIT_LIST_HEAD(&aa->aa_oaps);
1390 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1391 if (oap->oap_request) {
1392 ptlrpc_req_finished(oap->oap_request);
1393 oap->oap_request = ptlrpc_request_addref(new_req);
1396 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1398 DEBUG_REQ(D_INFO, new_req, "new request");
1400 ptlrpc_set_add_req(set, new_req);
1405 static int brw_interpret(struct ptlrpc_request *req, void *data, int rc)
1407 struct osc_brw_async_args *aa = data;
1412 rc = osc_brw_fini_request(req, rc);
1413 if (osc_recoverable_error(rc)) {
1414 rc = osc_brw_redo_request(req, aa);
1418 if ((rc >= 0) && req->rq_set && req->rq_set->set_countp)
1419 atomic_add(nob, (atomic_t *)req->rq_set->set_countp);
1421 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1422 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1423 aa->aa_cli->cl_w_in_flight--;
1425 aa->aa_cli->cl_r_in_flight--;
1426 for (i = 0; i < aa->aa_page_count; i++)
1427 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
1428 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1430 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1435 static int async_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1436 struct lov_stripe_md *lsm, obd_count page_count,
1437 struct brw_page **pga, struct ptlrpc_request_set *set,
1438 struct obd_capa *ocapa)
1440 struct ptlrpc_request *req;
1441 struct client_obd *cli = &exp->exp_obd->u.cli;
1443 struct osc_brw_async_args *aa;
1446 /* Consume write credits even if doing a sync write -
1447 * otherwise we may run out of space on OST due to grant. */
1448 if (cmd == OBD_BRW_WRITE) {
1449 spin_lock(&cli->cl_loi_list_lock);
1450 for (i = 0; i < page_count; i++) {
1451 if (cli->cl_avail_grant >= CFS_PAGE_SIZE)
1452 osc_consume_write_grant(cli, pga[i]);
1454 spin_unlock(&cli->cl_loi_list_lock);
1457 rc = osc_brw_prep_request(cmd, cli, oa, lsm, page_count, pga,
1460 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1461 if (cmd == OBD_BRW_READ) {
1462 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
1463 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
1464 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
1466 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
1467 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
1468 cli->cl_w_in_flight);
1469 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
1473 req->rq_interpret_reply = brw_interpret;
1474 ptlrpc_set_add_req(set, req);
1475 client_obd_list_lock(&cli->cl_loi_list_lock);
1476 if (cmd == OBD_BRW_READ)
1477 cli->cl_r_in_flight++;
1479 cli->cl_w_in_flight++;
1480 client_obd_list_unlock(&cli->cl_loi_list_lock);
1481 } else if (cmd == OBD_BRW_WRITE) {
1482 client_obd_list_lock(&cli->cl_loi_list_lock);
1483 for (i = 0; i < page_count; i++)
1484 osc_release_write_grant(cli, pga[i], 0);
1485 client_obd_list_unlock(&cli->cl_loi_list_lock);
1491 * ugh, we want disk allocation on the target to happen in offset order. we'll
1492 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1493 * fine for our small page arrays and doesn't require allocation. its an
1494 * insertion sort that swaps elements that are strides apart, shrinking the
1495 * stride down until its '1' and the array is sorted.
1497 static void sort_brw_pages(struct brw_page **array, int num)
1500 struct brw_page *tmp;
1504 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1509 for (i = stride ; i < num ; i++) {
1512 while (j >= stride && array[j - stride]->off > tmp->off) {
1513 array[j] = array[j - stride];
1518 } while (stride > 1);
1521 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1527 LASSERT (pages > 0);
1528 offset = pg[i]->off & ~CFS_PAGE_MASK;
1532 if (pages == 0) /* that's all */
1535 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1536 return count; /* doesn't end on page boundary */
1539 offset = pg[i]->off & ~CFS_PAGE_MASK;
1540 if (offset != 0) /* doesn't start on page boundary */
1547 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1549 struct brw_page **ppga;
1552 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1556 for (i = 0; i < count; i++)
1561 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1563 LASSERT(ppga != NULL);
1564 OBD_FREE(ppga, sizeof(*ppga) * count);
1567 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1568 obd_count page_count, struct brw_page *pga,
1569 struct obd_trans_info *oti)
1571 struct obdo *saved_oa = NULL;
1572 struct brw_page **ppga, **orig;
1573 struct obd_import *imp = class_exp2cliimp(exp);
1574 struct client_obd *cli = &imp->imp_obd->u.cli;
1575 int rc, page_count_orig;
1578 if (cmd & OBD_BRW_CHECK) {
1579 /* The caller just wants to know if there's a chance that this
1580 * I/O can succeed */
1582 if (imp == NULL || imp->imp_invalid)
1587 /* test_brw with a failed create can trip this, maybe others. */
1588 LASSERT(cli->cl_max_pages_per_rpc);
1592 orig = ppga = osc_build_ppga(pga, page_count);
1595 page_count_orig = page_count;
1597 sort_brw_pages(ppga, page_count);
1598 while (page_count) {
1599 obd_count pages_per_brw;
1601 if (page_count > cli->cl_max_pages_per_rpc)
1602 pages_per_brw = cli->cl_max_pages_per_rpc;
1604 pages_per_brw = page_count;
1606 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1608 if (saved_oa != NULL) {
1609 /* restore previously saved oa */
1610 *oinfo->oi_oa = *saved_oa;
1611 } else if (page_count > pages_per_brw) {
1612 /* save a copy of oa (brw will clobber it) */
1613 OBDO_ALLOC(saved_oa);
1614 if (saved_oa == NULL)
1615 GOTO(out, rc = -ENOMEM);
1616 *saved_oa = *oinfo->oi_oa;
1619 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1620 pages_per_brw, ppga, oinfo->oi_capa);
1625 page_count -= pages_per_brw;
1626 ppga += pages_per_brw;
1630 osc_release_ppga(orig, page_count_orig);
1632 if (saved_oa != NULL)
1633 OBDO_FREE(saved_oa);
1638 static int osc_brw_async(int cmd, struct obd_export *exp,
1639 struct obd_info *oinfo, obd_count page_count,
1640 struct brw_page *pga, struct obd_trans_info *oti,
1641 struct ptlrpc_request_set *set)
1643 struct brw_page **ppga, **orig;
1644 struct client_obd *cli = &exp->exp_obd->u.cli;
1645 int page_count_orig;
1649 if (cmd & OBD_BRW_CHECK) {
1650 struct obd_import *imp = class_exp2cliimp(exp);
1651 /* The caller just wants to know if there's a chance that this
1652 * I/O can succeed */
1654 if (imp == NULL || imp->imp_invalid)
1659 orig = ppga = osc_build_ppga(pga, page_count);
1662 page_count_orig = page_count;
1664 sort_brw_pages(ppga, page_count);
1665 while (page_count) {
1666 struct brw_page **copy;
1667 obd_count pages_per_brw;
1669 pages_per_brw = min_t(obd_count, page_count,
1670 cli->cl_max_pages_per_rpc);
1672 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1674 /* use ppga only if single RPC is going to fly */
1675 if (pages_per_brw != page_count_orig || ppga != orig) {
1676 OBD_ALLOC(copy, sizeof(*copy) * pages_per_brw);
1678 GOTO(out, rc = -ENOMEM);
1679 memcpy(copy, ppga, sizeof(*copy) * pages_per_brw);
1683 rc = async_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1684 pages_per_brw, copy, set, oinfo->oi_capa);
1688 OBD_FREE(copy, sizeof(*copy) * pages_per_brw);
1692 /* we passed it to async_internal() which is
1693 * now responsible for releasing memory */
1697 page_count -= pages_per_brw;
1698 ppga += pages_per_brw;
1702 osc_release_ppga(orig, page_count_orig);
1706 static void osc_check_rpcs(struct client_obd *cli);
1708 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1709 * the dirty accounting. Writeback completes or truncate happens before
1710 * writing starts. Must be called with the loi lock held. */
1711 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1714 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1718 /* This maintains the lists of pending pages to read/write for a given object
1719 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1720 * to quickly find objects that are ready to send an RPC. */
1721 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1727 if (lop->lop_num_pending == 0)
1730 /* if we have an invalid import we want to drain the queued pages
1731 * by forcing them through rpcs that immediately fail and complete
1732 * the pages. recovery relies on this to empty the queued pages
1733 * before canceling the locks and evicting down the llite pages */
1734 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1737 /* stream rpcs in queue order as long as as there is an urgent page
1738 * queued. this is our cheap solution for good batching in the case
1739 * where writepage marks some random page in the middle of the file
1740 * as urgent because of, say, memory pressure */
1741 if (!list_empty(&lop->lop_urgent)) {
1742 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1745 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1746 optimal = cli->cl_max_pages_per_rpc;
1747 if (cmd & OBD_BRW_WRITE) {
1748 /* trigger a write rpc stream as long as there are dirtiers
1749 * waiting for space. as they're waiting, they're not going to
1750 * create more pages to coallesce with what's waiting.. */
1751 if (!list_empty(&cli->cl_cache_waiters)) {
1752 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1755 /* +16 to avoid triggering rpcs that would want to include pages
1756 * that are being queued but which can't be made ready until
1757 * the queuer finishes with the page. this is a wart for
1758 * llite::commit_write() */
1761 if (lop->lop_num_pending >= optimal)
1767 static void on_list(struct list_head *item, struct list_head *list,
1770 if (list_empty(item) && should_be_on)
1771 list_add_tail(item, list);
1772 else if (!list_empty(item) && !should_be_on)
1773 list_del_init(item);
1776 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1777 * can find pages to build into rpcs quickly */
1778 static void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1780 on_list(&loi->loi_cli_item, &cli->cl_loi_ready_list,
1781 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE) ||
1782 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
1784 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
1785 loi->loi_write_lop.lop_num_pending);
1787 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
1788 loi->loi_read_lop.lop_num_pending);
1791 static void lop_update_pending(struct client_obd *cli,
1792 struct loi_oap_pages *lop, int cmd, int delta)
1794 lop->lop_num_pending += delta;
1795 if (cmd & OBD_BRW_WRITE)
1796 cli->cl_pending_w_pages += delta;
1798 cli->cl_pending_r_pages += delta;
1801 /* this is called when a sync waiter receives an interruption. Its job is to
1802 * get the caller woken as soon as possible. If its page hasn't been put in an
1803 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
1804 * desiring interruption which will forcefully complete the rpc once the rpc
1806 static void osc_occ_interrupted(struct oig_callback_context *occ)
1808 struct osc_async_page *oap;
1809 struct loi_oap_pages *lop;
1810 struct lov_oinfo *loi;
1813 /* XXX member_of() */
1814 oap = list_entry(occ, struct osc_async_page, oap_occ);
1816 client_obd_list_lock(&oap->oap_cli->cl_loi_list_lock);
1818 oap->oap_interrupted = 1;
1820 /* ok, it's been put in an rpc. only one oap gets a request reference */
1821 if (oap->oap_request != NULL) {
1822 ptlrpc_mark_interrupted(oap->oap_request);
1823 ptlrpcd_wake(oap->oap_request);
1827 /* we don't get interruption callbacks until osc_trigger_group_io()
1828 * has been called and put the sync oaps in the pending/urgent lists.*/
1829 if (!list_empty(&oap->oap_pending_item)) {
1830 list_del_init(&oap->oap_pending_item);
1831 list_del_init(&oap->oap_urgent_item);
1834 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
1835 &loi->loi_write_lop : &loi->loi_read_lop;
1836 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
1837 loi_list_maint(oap->oap_cli, oap->oap_loi);
1839 oig_complete_one(oap->oap_oig, &oap->oap_occ, -EINTR);
1840 oap->oap_oig = NULL;
1844 client_obd_list_unlock(&oap->oap_cli->cl_loi_list_lock);
1847 /* this is trying to propogate async writeback errors back up to the
1848 * application. As an async write fails we record the error code for later if
1849 * the app does an fsync. As long as errors persist we force future rpcs to be
1850 * sync so that the app can get a sync error and break the cycle of queueing
1851 * pages for which writeback will fail. */
1852 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
1859 ar->ar_force_sync = 1;
1860 ar->ar_min_xid = ptlrpc_sample_next_xid();
1865 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
1866 ar->ar_force_sync = 0;
1869 static void osc_oap_to_pending(struct osc_async_page *oap)
1871 struct loi_oap_pages *lop;
1873 if (oap->oap_cmd & OBD_BRW_WRITE)
1874 lop = &oap->oap_loi->loi_write_lop;
1876 lop = &oap->oap_loi->loi_read_lop;
1878 if (oap->oap_async_flags & ASYNC_URGENT)
1879 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
1880 list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
1881 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
1884 /* this must be called holding the loi list lock to give coverage to exit_cache,
1885 * async_flag maintenance, and oap_request */
1886 static void osc_ap_completion(struct client_obd *cli, struct obdo *oa,
1887 struct osc_async_page *oap, int sent, int rc)
1892 if (oap->oap_request != NULL) {
1893 xid = ptlrpc_req_xid(oap->oap_request);
1894 ptlrpc_req_finished(oap->oap_request);
1895 oap->oap_request = NULL;
1898 oap->oap_async_flags = 0;
1899 oap->oap_interrupted = 0;
1901 if (oap->oap_cmd & OBD_BRW_WRITE) {
1902 osc_process_ar(&cli->cl_ar, xid, rc);
1903 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
1906 if (rc == 0 && oa != NULL) {
1907 if (oa->o_valid & OBD_MD_FLBLOCKS)
1908 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
1909 if (oa->o_valid & OBD_MD_FLMTIME)
1910 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
1911 if (oa->o_valid & OBD_MD_FLATIME)
1912 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
1913 if (oa->o_valid & OBD_MD_FLCTIME)
1914 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
1918 osc_exit_cache(cli, oap, sent);
1919 oig_complete_one(oap->oap_oig, &oap->oap_occ, rc);
1920 oap->oap_oig = NULL;
1925 rc = oap->oap_caller_ops->ap_completion(oap->oap_caller_data,
1926 oap->oap_cmd, oa, rc);
1928 /* ll_ap_completion (from llite) drops PG_locked. so, a new
1929 * I/O on the page could start, but OSC calls it under lock
1930 * and thus we can add oap back to pending safely */
1932 /* upper layer wants to leave the page on pending queue */
1933 osc_oap_to_pending(oap);
1935 osc_exit_cache(cli, oap, sent);
1939 static int brw_interpret_oap(struct ptlrpc_request *req, void *data, int rc)
1941 struct osc_async_page *oap, *tmp;
1942 struct osc_brw_async_args *aa = data;
1943 struct client_obd *cli;
1946 rc = osc_brw_fini_request(req, rc);
1947 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1948 if (osc_recoverable_error(rc)) {
1949 rc = osc_brw_redo_request(req, aa);
1956 client_obd_list_lock(&cli->cl_loi_list_lock);
1958 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1959 * is called so we know whether to go to sync BRWs or wait for more
1960 * RPCs to complete */
1961 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1962 cli->cl_w_in_flight--;
1964 cli->cl_r_in_flight--;
1966 /* the caller may re-use the oap after the completion call so
1967 * we need to clean it up a little */
1968 list_for_each_entry_safe(oap, tmp, &aa->aa_oaps, oap_rpc_item) {
1969 list_del_init(&oap->oap_rpc_item);
1970 osc_ap_completion(cli, aa->aa_oa, oap, 1, rc);
1973 osc_wake_cache_waiters(cli);
1974 osc_check_rpcs(cli);
1976 client_obd_list_unlock(&cli->cl_loi_list_lock);
1978 OBDO_FREE(aa->aa_oa);
1980 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1984 static struct ptlrpc_request *osc_build_req(struct client_obd *cli,
1985 struct list_head *rpc_list,
1986 int page_count, int cmd)
1988 struct ptlrpc_request *req;
1989 struct brw_page **pga = NULL;
1990 struct osc_brw_async_args *aa;
1991 struct obdo *oa = NULL;
1992 struct obd_async_page_ops *ops = NULL;
1993 void *caller_data = NULL;
1994 struct obd_capa *ocapa;
1995 struct osc_async_page *oap;
1999 LASSERT(!list_empty(rpc_list));
2001 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2003 RETURN(ERR_PTR(-ENOMEM));
2007 GOTO(out, req = ERR_PTR(-ENOMEM));
2010 list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2012 ops = oap->oap_caller_ops;
2013 caller_data = oap->oap_caller_data;
2015 pga[i] = &oap->oap_brw_page;
2016 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2017 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2018 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2022 /* always get the data for the obdo for the rpc */
2023 LASSERT(ops != NULL);
2024 ops->ap_fill_obdo(caller_data, cmd, oa);
2025 ocapa = ops->ap_lookup_capa(caller_data, cmd);
2027 sort_brw_pages(pga, page_count);
2028 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2032 CERROR("prep_req failed: %d\n", rc);
2033 GOTO(out, req = ERR_PTR(rc));
2036 /* Need to update the timestamps after the request is built in case
2037 * we race with setattr (locally or in queue at OST). If OST gets
2038 * later setattr before earlier BRW (as determined by the request xid),
2039 * the OST will not use BRW timestamps. Sadly, there is no obvious
2040 * way to do this in a single call. bug 10150 */
2041 ops->ap_update_obdo(caller_data, cmd, oa,
2042 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME);
2044 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2045 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2046 INIT_LIST_HEAD(&aa->aa_oaps);
2047 list_splice(rpc_list, &aa->aa_oaps);
2048 INIT_LIST_HEAD(rpc_list);
2055 OBD_FREE(pga, sizeof(*pga) * page_count);
2060 /* the loi lock is held across this function but it's allowed to release
2061 * and reacquire it during its work */
2062 static int osc_send_oap_rpc(struct client_obd *cli, struct lov_oinfo *loi,
2063 int cmd, struct loi_oap_pages *lop)
2065 struct ptlrpc_request *req;
2066 obd_count page_count = 0;
2067 struct osc_async_page *oap = NULL, *tmp;
2068 struct osc_brw_async_args *aa;
2069 struct obd_async_page_ops *ops;
2070 CFS_LIST_HEAD(rpc_list);
2071 unsigned int ending_offset;
2072 unsigned starting_offset = 0;
2075 /* first we find the pages we're allowed to work with */
2076 list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2078 ops = oap->oap_caller_ops;
2080 LASSERT(oap->oap_magic == OAP_MAGIC);
2082 /* in llite being 'ready' equates to the page being locked
2083 * until completion unlocks it. commit_write submits a page
2084 * as not ready because its unlock will happen unconditionally
2085 * as the call returns. if we race with commit_write giving
2086 * us that page we dont' want to create a hole in the page
2087 * stream, so we stop and leave the rpc to be fired by
2088 * another dirtier or kupdated interval (the not ready page
2089 * will still be on the dirty list). we could call in
2090 * at the end of ll_file_write to process the queue again. */
2091 if (!(oap->oap_async_flags & ASYNC_READY)) {
2092 int rc = ops->ap_make_ready(oap->oap_caller_data, cmd);
2094 CDEBUG(D_INODE, "oap %p page %p returned %d "
2095 "instead of ready\n", oap,
2099 /* llite is telling us that the page is still
2100 * in commit_write and that we should try
2101 * and put it in an rpc again later. we
2102 * break out of the loop so we don't create
2103 * a hole in the sequence of pages in the rpc
2108 /* the io isn't needed.. tell the checks
2109 * below to complete the rpc with EINTR */
2110 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2111 oap->oap_count = -EINTR;
2114 oap->oap_async_flags |= ASYNC_READY;
2117 LASSERTF(0, "oap %p page %p returned %d "
2118 "from make_ready\n", oap,
2126 * Page submitted for IO has to be locked. Either by
2127 * ->ap_make_ready() or by higher layers.
2129 * XXX nikita: this assertion should be adjusted when lustre
2130 * starts using PG_writeback for pages being written out.
2132 #if defined(__KERNEL__) && defined(__LINUX__)
2133 LASSERT(PageLocked(oap->oap_page));
2135 /* If there is a gap at the start of this page, it can't merge
2136 * with any previous page, so we'll hand the network a
2137 * "fragmented" page array that it can't transfer in 1 RDMA */
2138 if (page_count != 0 && oap->oap_page_off != 0)
2141 /* take the page out of our book-keeping */
2142 list_del_init(&oap->oap_pending_item);
2143 lop_update_pending(cli, lop, cmd, -1);
2144 list_del_init(&oap->oap_urgent_item);
2146 if (page_count == 0)
2147 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2148 (PTLRPC_MAX_BRW_SIZE - 1);
2150 /* ask the caller for the size of the io as the rpc leaves. */
2151 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE))
2153 ops->ap_refresh_count(oap->oap_caller_data,cmd);
2154 if (oap->oap_count <= 0) {
2155 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2157 osc_ap_completion(cli, NULL, oap, 0, oap->oap_count);
2161 /* now put the page back in our accounting */
2162 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2163 if (++page_count >= cli->cl_max_pages_per_rpc)
2166 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2167 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2168 * have the same alignment as the initial writes that allocated
2169 * extents on the server. */
2170 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2171 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2172 if (ending_offset == 0)
2175 /* If there is a gap at the end of this page, it can't merge
2176 * with any subsequent pages, so we'll hand the network a
2177 * "fragmented" page array that it can't transfer in 1 RDMA */
2178 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2182 osc_wake_cache_waiters(cli);
2184 if (page_count == 0)
2187 loi_list_maint(cli, loi);
2189 client_obd_list_unlock(&cli->cl_loi_list_lock);
2191 req = osc_build_req(cli, &rpc_list, page_count, cmd);
2193 /* this should happen rarely and is pretty bad, it makes the
2194 * pending list not follow the dirty order */
2195 client_obd_list_lock(&cli->cl_loi_list_lock);
2196 list_for_each_entry_safe(oap, tmp, &rpc_list, oap_rpc_item) {
2197 list_del_init(&oap->oap_rpc_item);
2199 /* queued sync pages can be torn down while the pages
2200 * were between the pending list and the rpc */
2201 if (oap->oap_interrupted) {
2202 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2203 osc_ap_completion(cli, NULL, oap, 0,
2207 osc_ap_completion(cli, NULL, oap, 0, PTR_ERR(req));
2209 loi_list_maint(cli, loi);
2210 RETURN(PTR_ERR(req));
2213 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2215 if (cmd == OBD_BRW_READ) {
2216 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2217 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2218 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2219 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2220 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
2222 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2223 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2224 cli->cl_w_in_flight);
2225 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2226 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2227 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
2230 client_obd_list_lock(&cli->cl_loi_list_lock);
2232 if (cmd == OBD_BRW_READ)
2233 cli->cl_r_in_flight++;
2235 cli->cl_w_in_flight++;
2237 /* queued sync pages can be torn down while the pages
2238 * were between the pending list and the rpc */
2240 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2241 /* only one oap gets a request reference */
2244 if (oap->oap_interrupted && !req->rq_intr) {
2245 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2247 ptlrpc_mark_interrupted(req);
2251 tmp->oap_request = ptlrpc_request_addref(req);
2253 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2254 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2256 req->rq_interpret_reply = brw_interpret_oap;
2257 ptlrpcd_add_req(req);
2261 #define LOI_DEBUG(LOI, STR, args...) \
2262 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2263 !list_empty(&(LOI)->loi_cli_item), \
2264 (LOI)->loi_write_lop.lop_num_pending, \
2265 !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2266 (LOI)->loi_read_lop.lop_num_pending, \
2267 !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2270 /* This is called by osc_check_rpcs() to find which objects have pages that
2271 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2272 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2275 /* first return all objects which we already know to have
2276 * pages ready to be stuffed into rpcs */
2277 if (!list_empty(&cli->cl_loi_ready_list))
2278 RETURN(list_entry(cli->cl_loi_ready_list.next,
2279 struct lov_oinfo, loi_cli_item));
2281 /* then if we have cache waiters, return all objects with queued
2282 * writes. This is especially important when many small files
2283 * have filled up the cache and not been fired into rpcs because
2284 * they don't pass the nr_pending/object threshhold */
2285 if (!list_empty(&cli->cl_cache_waiters) &&
2286 !list_empty(&cli->cl_loi_write_list))
2287 RETURN(list_entry(cli->cl_loi_write_list.next,
2288 struct lov_oinfo, loi_write_item));
2290 /* then return all queued objects when we have an invalid import
2291 * so that they get flushed */
2292 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2293 if (!list_empty(&cli->cl_loi_write_list))
2294 RETURN(list_entry(cli->cl_loi_write_list.next,
2295 struct lov_oinfo, loi_write_item));
2296 if (!list_empty(&cli->cl_loi_read_list))
2297 RETURN(list_entry(cli->cl_loi_read_list.next,
2298 struct lov_oinfo, loi_read_item));
2303 /* called with the loi list lock held */
2304 static void osc_check_rpcs(struct client_obd *cli)
2306 struct lov_oinfo *loi;
2307 int rc = 0, race_counter = 0;
2310 while ((loi = osc_next_loi(cli)) != NULL) {
2311 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2313 if (rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight)
2316 /* attempt some read/write balancing by alternating between
2317 * reads and writes in an object. The makes_rpc checks here
2318 * would be redundant if we were getting read/write work items
2319 * instead of objects. we don't want send_oap_rpc to drain a
2320 * partial read pending queue when we're given this object to
2321 * do io on writes while there are cache waiters */
2322 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2323 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_WRITE,
2324 &loi->loi_write_lop);
2332 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2333 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_READ,
2334 &loi->loi_read_lop);
2343 /* attempt some inter-object balancing by issueing rpcs
2344 * for each object in turn */
2345 if (!list_empty(&loi->loi_cli_item))
2346 list_del_init(&loi->loi_cli_item);
2347 if (!list_empty(&loi->loi_write_item))
2348 list_del_init(&loi->loi_write_item);
2349 if (!list_empty(&loi->loi_read_item))
2350 list_del_init(&loi->loi_read_item);
2352 loi_list_maint(cli, loi);
2354 /* send_oap_rpc fails with 0 when make_ready tells it to
2355 * back off. llite's make_ready does this when it tries
2356 * to lock a page queued for write that is already locked.
2357 * we want to try sending rpcs from many objects, but we
2358 * don't want to spin failing with 0. */
2359 if (race_counter == 10)
2365 /* we're trying to queue a page in the osc so we're subject to the
2366 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2367 * If the osc's queued pages are already at that limit, then we want to sleep
2368 * until there is space in the osc's queue for us. We also may be waiting for
2369 * write credits from the OST if there are RPCs in flight that may return some
2370 * before we fall back to sync writes.
2372 * We need this know our allocation was granted in the presence of signals */
2373 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2377 client_obd_list_lock(&cli->cl_loi_list_lock);
2378 rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2379 client_obd_list_unlock(&cli->cl_loi_list_lock);
2383 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2384 * grant or cache space. */
2385 static int osc_enter_cache(struct client_obd *cli, struct lov_oinfo *loi,
2386 struct osc_async_page *oap)
2388 struct osc_cache_waiter ocw;
2389 struct l_wait_info lwi = { 0 };
2393 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2394 "grant: %lu\n", cli->cl_dirty, atomic_read(&obd_dirty_pages),
2395 cli->cl_dirty_max, obd_max_dirty_pages,
2396 cli->cl_lost_grant, cli->cl_avail_grant);
2398 /* force the caller to try sync io. this can jump the list
2399 * of queued writes and create a discontiguous rpc stream */
2400 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2401 loi->loi_ar.ar_force_sync)
2404 /* Hopefully normal case - cache space and write credits available */
2405 if ((cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max) &&
2406 (atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages) &&
2407 (cli->cl_avail_grant >= CFS_PAGE_SIZE)) {
2408 /* account for ourselves */
2409 osc_consume_write_grant(cli, &oap->oap_brw_page);
2413 /* Make sure that there are write rpcs in flight to wait for. This
2414 * is a little silly as this object may not have any pending but
2415 * other objects sure might. */
2416 if (cli->cl_w_in_flight) {
2417 list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2418 cfs_waitq_init(&ocw.ocw_waitq);
2422 loi_list_maint(cli, loi);
2423 osc_check_rpcs(cli);
2424 client_obd_list_unlock(&cli->cl_loi_list_lock);
2426 CDEBUG(D_CACHE, "sleeping for cache space\n");
2427 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2429 client_obd_list_lock(&cli->cl_loi_list_lock);
2430 if (!list_empty(&ocw.ocw_entry)) {
2431 list_del(&ocw.ocw_entry);
2440 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2441 struct lov_oinfo *loi, cfs_page_t *page,
2442 obd_off offset, struct obd_async_page_ops *ops,
2443 void *data, void **res)
2445 struct osc_async_page *oap;
2449 return size_round(sizeof(*oap));
2452 oap->oap_magic = OAP_MAGIC;
2453 oap->oap_cli = &exp->exp_obd->u.cli;
2456 oap->oap_caller_ops = ops;
2457 oap->oap_caller_data = data;
2459 oap->oap_page = page;
2460 oap->oap_obj_off = offset;
2462 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2463 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2464 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2466 oap->oap_occ.occ_interrupted = osc_occ_interrupted;
2468 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2472 struct osc_async_page *oap_from_cookie(void *cookie)
2474 struct osc_async_page *oap = cookie;
2475 if (oap->oap_magic != OAP_MAGIC)
2476 return ERR_PTR(-EINVAL);
2480 static int osc_queue_async_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2481 struct lov_oinfo *loi, void *cookie,
2482 int cmd, obd_off off, int count,
2483 obd_flag brw_flags, enum async_flags async_flags)
2485 struct client_obd *cli = &exp->exp_obd->u.cli;
2486 struct osc_async_page *oap;
2490 oap = oap_from_cookie(cookie);
2492 RETURN(PTR_ERR(oap));
2494 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2497 if (!list_empty(&oap->oap_pending_item) ||
2498 !list_empty(&oap->oap_urgent_item) ||
2499 !list_empty(&oap->oap_rpc_item))
2502 /* check if the file's owner/group is over quota */
2503 #ifdef HAVE_QUOTA_SUPPORT
2504 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)){
2505 struct obd_async_page_ops *ops;
2512 ops = oap->oap_caller_ops;
2513 ops->ap_fill_obdo(oap->oap_caller_data, cmd, oa);
2514 if (lquota_chkdq(quota_interface, cli, oa->o_uid, oa->o_gid) ==
2525 loi = lsm->lsm_oinfo[0];
2527 client_obd_list_lock(&cli->cl_loi_list_lock);
2530 oap->oap_page_off = off;
2531 oap->oap_count = count;
2532 oap->oap_brw_flags = brw_flags;
2533 oap->oap_async_flags = async_flags;
2535 if (cmd & OBD_BRW_WRITE) {
2536 rc = osc_enter_cache(cli, loi, oap);
2538 client_obd_list_unlock(&cli->cl_loi_list_lock);
2543 osc_oap_to_pending(oap);
2544 loi_list_maint(cli, loi);
2546 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2549 osc_check_rpcs(cli);
2550 client_obd_list_unlock(&cli->cl_loi_list_lock);
2555 /* aka (~was & now & flag), but this is more clear :) */
2556 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2558 static int osc_set_async_flags(struct obd_export *exp,
2559 struct lov_stripe_md *lsm,
2560 struct lov_oinfo *loi, void *cookie,
2561 obd_flag async_flags)
2563 struct client_obd *cli = &exp->exp_obd->u.cli;
2564 struct loi_oap_pages *lop;
2565 struct osc_async_page *oap;
2569 oap = oap_from_cookie(cookie);
2571 RETURN(PTR_ERR(oap));
2574 * bug 7311: OST-side locking is only supported for liblustre for now
2575 * (and liblustre never calls obd_set_async_flags(). I hope.), generic
2576 * implementation has to handle case where OST-locked page was picked
2577 * up by, e.g., ->writepage().
2579 LASSERT(!(oap->oap_brw_flags & OBD_BRW_SRVLOCK));
2580 LASSERT(!LIBLUSTRE_CLIENT); /* check that liblustre angels do fear to
2583 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2587 loi = lsm->lsm_oinfo[0];
2589 if (oap->oap_cmd & OBD_BRW_WRITE) {
2590 lop = &loi->loi_write_lop;
2592 lop = &loi->loi_read_lop;
2595 client_obd_list_lock(&cli->cl_loi_list_lock);
2597 if (list_empty(&oap->oap_pending_item))
2598 GOTO(out, rc = -EINVAL);
2600 if ((oap->oap_async_flags & async_flags) == async_flags)
2603 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2604 oap->oap_async_flags |= ASYNC_READY;
2606 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT)) {
2607 if (list_empty(&oap->oap_rpc_item)) {
2608 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2609 loi_list_maint(cli, loi);
2613 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
2614 oap->oap_async_flags);
2616 osc_check_rpcs(cli);
2617 client_obd_list_unlock(&cli->cl_loi_list_lock);
2621 static int osc_queue_group_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2622 struct lov_oinfo *loi,
2623 struct obd_io_group *oig, void *cookie,
2624 int cmd, obd_off off, int count,
2626 obd_flag async_flags)
2628 struct client_obd *cli = &exp->exp_obd->u.cli;
2629 struct osc_async_page *oap;
2630 struct loi_oap_pages *lop;
2634 oap = oap_from_cookie(cookie);
2636 RETURN(PTR_ERR(oap));
2638 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2641 if (!list_empty(&oap->oap_pending_item) ||
2642 !list_empty(&oap->oap_urgent_item) ||
2643 !list_empty(&oap->oap_rpc_item))
2647 loi = lsm->lsm_oinfo[0];
2649 client_obd_list_lock(&cli->cl_loi_list_lock);
2652 oap->oap_page_off = off;
2653 oap->oap_count = count;
2654 oap->oap_brw_flags = brw_flags;
2655 oap->oap_async_flags = async_flags;
2657 if (cmd & OBD_BRW_WRITE)
2658 lop = &loi->loi_write_lop;
2660 lop = &loi->loi_read_lop;
2662 list_add_tail(&oap->oap_pending_item, &lop->lop_pending_group);
2663 if (oap->oap_async_flags & ASYNC_GROUP_SYNC) {
2665 rc = oig_add_one(oig, &oap->oap_occ);
2668 LOI_DEBUG(loi, "oap %p page %p on group pending: rc %d\n",
2669 oap, oap->oap_page, rc);
2671 client_obd_list_unlock(&cli->cl_loi_list_lock);
2676 static void osc_group_to_pending(struct client_obd *cli, struct lov_oinfo *loi,
2677 struct loi_oap_pages *lop, int cmd)
2679 struct list_head *pos, *tmp;
2680 struct osc_async_page *oap;
2682 list_for_each_safe(pos, tmp, &lop->lop_pending_group) {
2683 oap = list_entry(pos, struct osc_async_page, oap_pending_item);
2684 list_del(&oap->oap_pending_item);
2685 osc_oap_to_pending(oap);
2687 loi_list_maint(cli, loi);
2690 static int osc_trigger_group_io(struct obd_export *exp,
2691 struct lov_stripe_md *lsm,
2692 struct lov_oinfo *loi,
2693 struct obd_io_group *oig)
2695 struct client_obd *cli = &exp->exp_obd->u.cli;
2699 loi = lsm->lsm_oinfo[0];
2701 client_obd_list_lock(&cli->cl_loi_list_lock);
2703 osc_group_to_pending(cli, loi, &loi->loi_write_lop, OBD_BRW_WRITE);
2704 osc_group_to_pending(cli, loi, &loi->loi_read_lop, OBD_BRW_READ);
2706 osc_check_rpcs(cli);
2707 client_obd_list_unlock(&cli->cl_loi_list_lock);
2712 static int osc_teardown_async_page(struct obd_export *exp,
2713 struct lov_stripe_md *lsm,
2714 struct lov_oinfo *loi, void *cookie)
2716 struct client_obd *cli = &exp->exp_obd->u.cli;
2717 struct loi_oap_pages *lop;
2718 struct osc_async_page *oap;
2722 oap = oap_from_cookie(cookie);
2724 RETURN(PTR_ERR(oap));
2727 loi = lsm->lsm_oinfo[0];
2729 if (oap->oap_cmd & OBD_BRW_WRITE) {
2730 lop = &loi->loi_write_lop;
2732 lop = &loi->loi_read_lop;
2735 client_obd_list_lock(&cli->cl_loi_list_lock);
2737 if (!list_empty(&oap->oap_rpc_item))
2738 GOTO(out, rc = -EBUSY);
2740 osc_exit_cache(cli, oap, 0);
2741 osc_wake_cache_waiters(cli);
2743 if (!list_empty(&oap->oap_urgent_item)) {
2744 list_del_init(&oap->oap_urgent_item);
2745 oap->oap_async_flags &= ~ASYNC_URGENT;
2747 if (!list_empty(&oap->oap_pending_item)) {
2748 list_del_init(&oap->oap_pending_item);
2749 lop_update_pending(cli, lop, oap->oap_cmd, -1);
2751 loi_list_maint(cli, loi);
2753 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
2755 client_obd_list_unlock(&cli->cl_loi_list_lock);
2759 static void osc_set_data_with_check(struct lustre_handle *lockh, void *data,
2762 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2765 CERROR("lockh %p, data %p - client evicted?\n", lockh, data);
2768 lock_res_and_lock(lock);
2771 /* Liang XXX: Darwin and Winnt checking should be added */
2772 if (lock->l_ast_data && lock->l_ast_data != data) {
2773 struct inode *new_inode = data;
2774 struct inode *old_inode = lock->l_ast_data;
2775 if (!(old_inode->i_state & I_FREEING))
2776 LDLM_ERROR(lock, "inconsistent l_ast_data found");
2777 LASSERTF(old_inode->i_state & I_FREEING,
2778 "Found existing inode %p/%lu/%u state %lu in lock: "
2779 "setting data to %p/%lu/%u\n", old_inode,
2780 old_inode->i_ino, old_inode->i_generation,
2782 new_inode, new_inode->i_ino, new_inode->i_generation);
2786 lock->l_ast_data = data;
2787 lock->l_flags |= (flags & LDLM_FL_NO_LRU);
2788 unlock_res_and_lock(lock);
2789 LDLM_LOCK_PUT(lock);
2792 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2793 ldlm_iterator_t replace, void *data)
2795 struct ldlm_res_id res_id = { .name = {0} };
2796 struct obd_device *obd = class_exp2obd(exp);
2798 res_id.name[0] = lsm->lsm_object_id;
2799 res_id.name[2] = lsm->lsm_object_gr;
2801 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2805 static int osc_enqueue_fini(struct ptlrpc_request *req, struct obd_info *oinfo,
2811 /* The request was created before ldlm_cli_enqueue call. */
2812 if (rc == ELDLM_LOCK_ABORTED) {
2813 struct ldlm_reply *rep;
2815 /* swabbed by ldlm_cli_enqueue() */
2816 LASSERT_REPSWABBED(req, DLM_LOCKREPLY_OFF);
2817 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
2819 LASSERT(rep != NULL);
2820 if (rep->lock_policy_res1)
2821 rc = rep->lock_policy_res1;
2825 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
2826 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
2827 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_size,
2828 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_blocks,
2829 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_mtime);
2832 /* Call the update callback. */
2833 rc = oinfo->oi_cb_up(oinfo, rc);
2837 static int osc_enqueue_interpret(struct ptlrpc_request *req,
2838 struct osc_enqueue_args *aa, int rc)
2840 int intent = aa->oa_oi->oi_flags & LDLM_FL_HAS_INTENT;
2841 struct lov_stripe_md *lsm = aa->oa_oi->oi_md;
2842 struct ldlm_lock *lock;
2844 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2846 lock = ldlm_handle2lock(aa->oa_oi->oi_lockh);
2848 /* Complete obtaining the lock procedure. */
2849 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
2851 &aa->oa_oi->oi_flags,
2852 &lsm->lsm_oinfo[0]->loi_lvb,
2853 sizeof(lsm->lsm_oinfo[0]->loi_lvb),
2854 lustre_swab_ost_lvb,
2855 aa->oa_oi->oi_lockh, rc);
2857 /* Complete osc stuff. */
2858 rc = osc_enqueue_fini(req, aa->oa_oi, intent, rc);
2860 /* Release the lock for async request. */
2861 if (lustre_handle_is_used(aa->oa_oi->oi_lockh) && rc == ELDLM_OK)
2862 ldlm_lock_decref(aa->oa_oi->oi_lockh, aa->oa_ei->ei_mode);
2864 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
2865 aa->oa_oi->oi_lockh, req, aa);
2866 LDLM_LOCK_PUT(lock);
2870 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2871 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2872 * other synchronous requests, however keeping some locks and trying to obtain
2873 * others may take a considerable amount of time in a case of ost failure; and
2874 * when other sync requests do not get released lock from a client, the client
2875 * is excluded from the cluster -- such scenarious make the life difficult, so
2876 * release locks just after they are obtained. */
2877 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
2878 struct ldlm_enqueue_info *einfo,
2879 struct ptlrpc_request_set *rqset)
2881 struct ldlm_res_id res_id = { .name = {0} };
2882 struct obd_device *obd = exp->exp_obd;
2883 struct ldlm_reply *rep;
2884 struct ptlrpc_request *req = NULL;
2885 int intent = oinfo->oi_flags & LDLM_FL_HAS_INTENT;
2889 res_id.name[0] = oinfo->oi_md->lsm_object_id;
2890 res_id.name[2] = oinfo->oi_md->lsm_object_gr;
2892 /* Filesystem lock extents are extended to page boundaries so that
2893 * dealing with the page cache is a little smoother. */
2894 oinfo->oi_policy.l_extent.start -=
2895 oinfo->oi_policy.l_extent.start & ~CFS_PAGE_MASK;
2896 oinfo->oi_policy.l_extent.end |= ~CFS_PAGE_MASK;
2898 if (oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid == 0)
2901 /* Next, search for already existing extent locks that will cover us */
2902 rc = ldlm_lock_match(obd->obd_namespace,
2903 oinfo->oi_flags | LDLM_FL_LVB_READY, &res_id,
2904 einfo->ei_type, &oinfo->oi_policy, einfo->ei_mode,
2907 osc_set_data_with_check(oinfo->oi_lockh, einfo->ei_cbdata,
2910 /* I would like to be able to ASSERT here that rss <=
2911 * kms, but I can't, for reasons which are explained in
2915 /* We already have a lock, and it's referenced */
2916 oinfo->oi_cb_up(oinfo, ELDLM_OK);
2918 /* For async requests, decref the lock. */
2920 ldlm_lock_decref(oinfo->oi_lockh, einfo->ei_mode);
2925 /* If we're trying to read, we also search for an existing PW lock. The
2926 * VFS and page cache already protect us locally, so lots of readers/
2927 * writers can share a single PW lock.
2929 * There are problems with conversion deadlocks, so instead of
2930 * converting a read lock to a write lock, we'll just enqueue a new
2933 * At some point we should cancel the read lock instead of making them
2934 * send us a blocking callback, but there are problems with canceling
2935 * locks out from other users right now, too. */
2937 if (einfo->ei_mode == LCK_PR) {
2938 rc = ldlm_lock_match(obd->obd_namespace,
2939 oinfo->oi_flags | LDLM_FL_LVB_READY,
2940 &res_id, einfo->ei_type, &oinfo->oi_policy,
2941 LCK_PW, oinfo->oi_lockh);
2943 /* FIXME: This is not incredibly elegant, but it might
2944 * be more elegant than adding another parameter to
2945 * lock_match. I want a second opinion. */
2946 /* addref the lock only if not async requests. */
2948 ldlm_lock_addref(oinfo->oi_lockh, LCK_PR);
2949 osc_set_data_with_check(oinfo->oi_lockh,
2952 oinfo->oi_cb_up(oinfo, ELDLM_OK);
2953 ldlm_lock_decref(oinfo->oi_lockh, LCK_PW);
2961 [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
2962 [DLM_LOCKREQ_OFF] = sizeof(struct ldlm_request),
2963 [DLM_LOCKREQ_OFF + 1] = 0 };
2965 req = ldlm_prep_enqueue_req(exp, 2, size, NULL, 0);
2969 size[DLM_LOCKREPLY_OFF] = sizeof(*rep);
2970 size[DLM_REPLY_REC_OFF] =
2971 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb);
2972 ptlrpc_req_set_repsize(req, 3, size);
2975 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2976 oinfo->oi_flags &= ~LDLM_FL_BLOCK_GRANTED;
2978 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id,
2979 &oinfo->oi_policy, &oinfo->oi_flags,
2980 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
2981 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb),
2982 lustre_swab_ost_lvb, oinfo->oi_lockh,
2986 struct osc_enqueue_args *aa;
2987 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2988 aa = (struct osc_enqueue_args *)&req->rq_async_args;
2993 req->rq_interpret_reply = osc_enqueue_interpret;
2994 ptlrpc_set_add_req(rqset, req);
2995 } else if (intent) {
2996 ptlrpc_req_finished(req);
3001 rc = osc_enqueue_fini(req, oinfo, intent, rc);
3003 ptlrpc_req_finished(req);
3008 static int osc_match(struct obd_export *exp, struct lov_stripe_md *lsm,
3009 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3010 int *flags, void *data, struct lustre_handle *lockh)
3012 struct ldlm_res_id res_id = { .name = {0} };
3013 struct obd_device *obd = exp->exp_obd;
3015 int lflags = *flags;
3018 res_id.name[0] = lsm->lsm_object_id;
3019 res_id.name[2] = lsm->lsm_object_gr;
3021 OBD_FAIL_RETURN(OBD_FAIL_OSC_MATCH, -EIO);
3023 /* Filesystem lock extents are extended to page boundaries so that
3024 * dealing with the page cache is a little smoother */
3025 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3026 policy->l_extent.end |= ~CFS_PAGE_MASK;
3028 /* Next, search for already existing extent locks that will cover us */
3029 rc = ldlm_lock_match(obd->obd_namespace, lflags | LDLM_FL_LVB_READY,
3030 &res_id, type, policy, mode, lockh);
3032 //if (!(*flags & LDLM_FL_TEST_LOCK))
3033 osc_set_data_with_check(lockh, data, lflags);
3036 /* If we're trying to read, we also search for an existing PW lock. The
3037 * VFS and page cache already protect us locally, so lots of readers/
3038 * writers can share a single PW lock. */
3039 if (mode == LCK_PR) {
3040 rc = ldlm_lock_match(obd->obd_namespace,
3041 lflags | LDLM_FL_LVB_READY, &res_id,
3042 type, policy, LCK_PW, lockh);
3043 if (rc == 1 && !(lflags & LDLM_FL_TEST_LOCK)) {
3044 /* FIXME: This is not incredibly elegant, but it might
3045 * be more elegant than adding another parameter to
3046 * lock_match. I want a second opinion. */
3047 osc_set_data_with_check(lockh, data, lflags);
3048 ldlm_lock_addref(lockh, LCK_PR);
3049 ldlm_lock_decref(lockh, LCK_PW);
3055 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3056 __u32 mode, struct lustre_handle *lockh)
3060 if (unlikely(mode == LCK_GROUP))
3061 ldlm_lock_decref_and_cancel(lockh, mode);
3063 ldlm_lock_decref(lockh, mode);
3068 static int osc_cancel_unused(struct obd_export *exp,
3069 struct lov_stripe_md *lsm, int flags,
3072 struct obd_device *obd = class_exp2obd(exp);
3073 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3076 res_id.name[0] = lsm->lsm_object_id;
3077 res_id.name[2] = lsm->lsm_object_gr;
3081 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3084 static int osc_join_lru(struct obd_export *exp,
3085 struct lov_stripe_md *lsm, int join)
3087 struct obd_device *obd = class_exp2obd(exp);
3088 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3091 res_id.name[0] = lsm->lsm_object_id;
3092 res_id.name[2] = lsm->lsm_object_gr;
3096 return ldlm_cli_join_lru(obd->obd_namespace, resp, join);
3099 static int osc_statfs_interpret(struct ptlrpc_request *req,
3100 struct osc_async_args *aa, int rc)
3102 struct obd_statfs *msfs;
3108 msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
3109 lustre_swab_obd_statfs);
3111 CERROR("Can't unpack obd_statfs\n");
3112 GOTO(out, rc = -EPROTO);
3115 memcpy(aa->aa_oi->oi_osfs, msfs, sizeof(*msfs));
3117 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3121 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3122 __u64 max_age, struct ptlrpc_request_set *rqset)
3124 struct ptlrpc_request *req;
3125 struct osc_async_args *aa;
3126 int size[2] = { sizeof(struct ptlrpc_body), sizeof(*oinfo->oi_osfs) };
3129 /* We could possibly pass max_age in the request (as an absolute
3130 * timestamp or a "seconds.usec ago") so the target can avoid doing
3131 * extra calls into the filesystem if that isn't necessary (e.g.
3132 * during mount that would help a bit). Having relative timestamps
3133 * is not so great if request processing is slow, while absolute
3134 * timestamps are not ideal because they need time synchronization. */
3135 req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OST_VERSION,
3136 OST_STATFS, 1, NULL, NULL);
3140 ptlrpc_req_set_repsize(req, 2, size);
3141 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3143 req->rq_interpret_reply = osc_statfs_interpret;
3144 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3145 aa = (struct osc_async_args *)&req->rq_async_args;
3148 ptlrpc_set_add_req(rqset, req);
3152 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3155 struct obd_statfs *msfs;
3156 struct ptlrpc_request *req;
3157 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*osfs) };
3160 /* We could possibly pass max_age in the request (as an absolute
3161 * timestamp or a "seconds.usec ago") so the target can avoid doing
3162 * extra calls into the filesystem if that isn't necessary (e.g.
3163 * during mount that would help a bit). Having relative timestamps
3164 * is not so great if request processing is slow, while absolute
3165 * timestamps are not ideal because they need time synchronization. */
3166 req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OST_VERSION,
3167 OST_STATFS, 1, NULL, NULL);
3171 ptlrpc_req_set_repsize(req, 2, size);
3172 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3174 rc = ptlrpc_queue_wait(req);
3178 msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
3179 lustre_swab_obd_statfs);
3181 CERROR("Can't unpack obd_statfs\n");
3182 GOTO(out, rc = -EPROTO);
3185 memcpy(osfs, msfs, sizeof(*osfs));
3189 ptlrpc_req_finished(req);
3193 /* Retrieve object striping information.
3195 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3196 * the maximum number of OST indices which will fit in the user buffer.
3197 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3199 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3201 struct lov_user_md lum, *lumk;
3202 int rc = 0, lum_size;
3208 if (copy_from_user(&lum, lump, sizeof(lum)))
3211 if (lum.lmm_magic != LOV_USER_MAGIC)
3214 if (lum.lmm_stripe_count > 0) {
3215 lum_size = sizeof(lum) + sizeof(lum.lmm_objects[0]);
3216 OBD_ALLOC(lumk, lum_size);
3220 lumk->lmm_objects[0].l_object_id = lsm->lsm_object_id;
3221 lumk->lmm_objects[0].l_object_gr = lsm->lsm_object_gr;
3223 lum_size = sizeof(lum);
3227 lumk->lmm_object_id = lsm->lsm_object_id;
3228 lumk->lmm_object_gr = lsm->lsm_object_gr;
3229 lumk->lmm_stripe_count = 1;
3231 if (copy_to_user(lump, lumk, lum_size))
3235 OBD_FREE(lumk, lum_size);
3241 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3242 void *karg, void *uarg)
3244 struct obd_device *obd = exp->exp_obd;
3245 struct obd_ioctl_data *data = karg;
3249 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
3252 if (!try_module_get(THIS_MODULE)) {
3253 CERROR("Can't get module. Is it alive?");
3258 case OBD_IOC_LOV_GET_CONFIG: {
3260 struct lov_desc *desc;
3261 struct obd_uuid uuid;
3265 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3266 GOTO(out, err = -EINVAL);
3268 data = (struct obd_ioctl_data *)buf;
3270 if (sizeof(*desc) > data->ioc_inllen1) {
3271 obd_ioctl_freedata(buf, len);
3272 GOTO(out, err = -EINVAL);
3275 if (data->ioc_inllen2 < sizeof(uuid)) {
3276 obd_ioctl_freedata(buf, len);
3277 GOTO(out, err = -EINVAL);
3280 desc = (struct lov_desc *)data->ioc_inlbuf1;
3281 desc->ld_tgt_count = 1;
3282 desc->ld_active_tgt_count = 1;
3283 desc->ld_default_stripe_count = 1;
3284 desc->ld_default_stripe_size = 0;
3285 desc->ld_default_stripe_offset = 0;
3286 desc->ld_pattern = 0;
3287 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3289 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3291 err = copy_to_user((void *)uarg, buf, len);
3294 obd_ioctl_freedata(buf, len);
3297 case LL_IOC_LOV_SETSTRIPE:
3298 err = obd_alloc_memmd(exp, karg);
3302 case LL_IOC_LOV_GETSTRIPE:
3303 err = osc_getstripe(karg, uarg);
3305 case OBD_IOC_CLIENT_RECOVER:
3306 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3311 case IOC_OSC_SET_ACTIVE:
3312 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3315 case OBD_IOC_POLL_QUOTACHECK:
3316 err = lquota_poll_check(quota_interface, exp,
3317 (struct if_quotacheck *)karg);
3320 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3321 cmd, cfs_curproc_comm());
3322 GOTO(out, err = -ENOTTY);
3325 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
3328 module_put(THIS_MODULE);
3333 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3334 void *key, __u32 *vallen, void *val)
3337 if (!vallen || !val)
3340 if (keylen > strlen("lock_to_stripe") &&
3341 strcmp(key, "lock_to_stripe") == 0) {
3342 __u32 *stripe = val;
3343 *vallen = sizeof(*stripe);
3346 } else if (keylen >= strlen("last_id") && strcmp(key, "last_id") == 0) {
3347 struct ptlrpc_request *req;
3349 char *bufs[2] = { NULL, key };
3350 int rc, size[2] = { sizeof(struct ptlrpc_body), keylen };
3352 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
3353 OST_GET_INFO, 2, size, bufs);
3357 size[REPLY_REC_OFF] = *vallen;
3358 ptlrpc_req_set_repsize(req, 2, size);
3359 rc = ptlrpc_queue_wait(req);
3363 reply = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*reply),
3364 lustre_swab_ost_last_id);
3365 if (reply == NULL) {
3366 CERROR("Can't unpack OST last ID\n");
3367 GOTO(out, rc = -EPROTO);
3369 *((obd_id *)val) = *reply;
3371 ptlrpc_req_finished(req);
3377 static int osc_setinfo_mds_conn_interpret(struct ptlrpc_request *req,
3380 struct llog_ctxt *ctxt;
3381 struct obd_import *imp = req->rq_import;
3387 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3390 rc = llog_initiator_connect(ctxt);
3392 CERROR("cannot establish connection for "
3393 "ctxt %p: %d\n", ctxt, rc);
3396 spin_lock(&imp->imp_lock);
3397 imp->imp_server_timeout = 1;
3398 imp->imp_pingable = 1;
3399 spin_unlock(&imp->imp_lock);
3400 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3405 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3406 void *key, obd_count vallen, void *val,
3407 struct ptlrpc_request_set *set)
3409 struct ptlrpc_request *req;
3410 struct obd_device *obd = exp->exp_obd;
3411 struct obd_import *imp = class_exp2cliimp(exp);
3412 int size[3] = { sizeof(struct ptlrpc_body), keylen, vallen };
3413 char *bufs[3] = { NULL, key, val };
3416 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3418 if (KEY_IS(KEY_NEXT_ID)) {
3419 if (vallen != sizeof(obd_id))
3421 obd->u.cli.cl_oscc.oscc_next_id = *((obd_id*)val) + 1;
3422 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3423 exp->exp_obd->obd_name,
3424 obd->u.cli.cl_oscc.oscc_next_id);
3429 if (KEY_IS("unlinked")) {
3430 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3431 spin_lock(&oscc->oscc_lock);
3432 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3433 spin_unlock(&oscc->oscc_lock);
3437 if (KEY_IS(KEY_INIT_RECOV)) {
3438 if (vallen != sizeof(int))
3440 spin_lock(&imp->imp_lock);
3441 imp->imp_initial_recov = *(int *)val;
3442 spin_unlock(&imp->imp_lock);
3443 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3444 exp->exp_obd->obd_name,
3445 imp->imp_initial_recov);
3449 if (KEY_IS("checksum")) {
3450 if (vallen != sizeof(int))
3452 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3456 if (KEY_IS(KEY_FLUSH_CTX)) {
3457 sptlrpc_import_flush_my_ctx(imp);
3464 /* We pass all other commands directly to OST. Since nobody calls osc
3465 methods directly and everybody is supposed to go through LOV, we
3466 assume lov checked invalid values for us.
3467 The only recognised values so far are evict_by_nid and mds_conn.
3468 Even if something bad goes through, we'd get a -EINVAL from OST
3471 req = ptlrpc_prep_req(imp, LUSTRE_OST_VERSION, OST_SET_INFO, 3, size,
3476 if (KEY_IS(KEY_MDS_CONN)) {
3477 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3479 oscc->oscc_oa.o_gr = (*(__u32 *)val);
3480 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
3481 LASSERT(oscc->oscc_oa.o_gr > 0);
3482 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
3485 ptlrpc_req_set_repsize(req, 1, NULL);
3486 ptlrpc_set_add_req(set, req);
3487 ptlrpc_check_set(set);
3493 static struct llog_operations osc_size_repl_logops = {
3494 lop_cancel: llog_obd_repl_cancel
3497 static struct llog_operations osc_mds_ost_orig_logops;
3498 static int osc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
3499 struct obd_device *tgt, int count,
3500 struct llog_catid *catid, struct obd_uuid *uuid)
3505 spin_lock(&obd->obd_dev_lock);
3506 if (osc_mds_ost_orig_logops.lop_setup != llog_obd_origin_setup) {
3507 osc_mds_ost_orig_logops = llog_lvfs_ops;
3508 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
3509 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
3510 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
3511 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
3513 spin_unlock(&obd->obd_dev_lock);
3515 rc = llog_setup(obd, llogs, LLOG_MDS_OST_ORIG_CTXT, tgt, count,
3516 &catid->lci_logid, &osc_mds_ost_orig_logops);
3518 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
3522 rc = llog_setup(obd, llogs, LLOG_SIZE_REPL_CTXT, tgt, count, NULL,
3523 &osc_size_repl_logops);
3525 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
3528 CERROR("osc '%s' tgt '%s' cnt %d catid %p rc=%d\n",
3529 obd->obd_name, tgt->obd_name, count, catid, rc);
3530 CERROR("logid "LPX64":0x%x\n",
3531 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
3536 static int osc_llog_finish(struct obd_device *obd, int count)
3538 struct llog_ctxt *ctxt;
3539 int rc = 0, rc2 = 0;
3542 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3544 rc = llog_cleanup(ctxt);
3546 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3548 rc2 = llog_cleanup(ctxt);
3555 static int osc_reconnect(struct obd_export *exp, struct obd_device *obd,
3556 struct obd_uuid *cluuid,
3557 struct obd_connect_data *data)
3559 struct client_obd *cli = &obd->u.cli;
3561 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3564 client_obd_list_lock(&cli->cl_loi_list_lock);
3565 data->ocd_grant = cli->cl_avail_grant ?:
3566 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
3567 lost_grant = cli->cl_lost_grant;
3568 cli->cl_lost_grant = 0;
3569 client_obd_list_unlock(&cli->cl_loi_list_lock);
3571 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
3572 "cl_lost_grant: %ld\n", data->ocd_grant,
3573 cli->cl_avail_grant, lost_grant);
3574 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
3575 " ocd_grant: %d\n", data->ocd_connect_flags,
3576 data->ocd_version, data->ocd_grant);
3582 static int osc_disconnect(struct obd_export *exp)
3584 struct obd_device *obd = class_exp2obd(exp);
3585 struct llog_ctxt *ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3588 if (obd->u.cli.cl_conn_count == 1)
3589 /* flush any remaining cancel messages out to the target */
3590 llog_sync(ctxt, exp);
3592 rc = client_disconnect_export(exp);
3596 static int osc_import_event(struct obd_device *obd,
3597 struct obd_import *imp,
3598 enum obd_import_event event)
3600 struct client_obd *cli;
3604 LASSERT(imp->imp_obd == obd);
3607 case IMP_EVENT_DISCON: {
3608 /* Only do this on the MDS OSC's */
3609 if (imp->imp_server_timeout) {
3610 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3612 spin_lock(&oscc->oscc_lock);
3613 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
3614 spin_unlock(&oscc->oscc_lock);
3617 client_obd_list_lock(&cli->cl_loi_list_lock);
3618 cli->cl_avail_grant = 0;
3619 cli->cl_lost_grant = 0;
3620 client_obd_list_unlock(&cli->cl_loi_list_lock);
3623 case IMP_EVENT_INACTIVE: {
3624 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
3627 case IMP_EVENT_INVALIDATE: {
3628 struct ldlm_namespace *ns = obd->obd_namespace;
3632 client_obd_list_lock(&cli->cl_loi_list_lock);
3633 /* all pages go to failing rpcs due to the invalid import */
3634 osc_check_rpcs(cli);
3635 client_obd_list_unlock(&cli->cl_loi_list_lock);
3637 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3641 case IMP_EVENT_ACTIVE: {
3642 /* Only do this on the MDS OSC's */
3643 if (imp->imp_server_timeout) {
3644 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3646 spin_lock(&oscc->oscc_lock);
3647 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3648 spin_unlock(&oscc->oscc_lock);
3650 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3653 case IMP_EVENT_OCD: {
3654 struct obd_connect_data *ocd = &imp->imp_connect_data;
3656 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3657 osc_init_grant(&obd->u.cli, ocd);
3660 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3661 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3663 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3667 CERROR("Unknown import event %d\n", event);
3673 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3679 rc = ptlrpcd_addref();
3683 rc = client_obd_setup(obd, lcfg);
3687 struct lprocfs_static_vars lvars;
3688 struct client_obd *cli = &obd->u.cli;
3690 lprocfs_init_vars(osc, &lvars);
3691 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
3692 lproc_osc_attach_seqstat(obd);
3693 ptlrpc_lprocfs_register_obd(obd);
3697 /* We need to allocate a few requests more, because
3698 brw_interpret_oap tries to create new requests before freeing
3699 previous ones. Ideally we want to have 2x max_rpcs_in_flight
3700 reserved, but I afraid that might be too much wasted RAM
3701 in fact, so 2 is just my guess and still should work. */
3702 cli->cl_import->imp_rq_pool =
3703 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
3705 ptlrpc_add_rqs_to_pool);
3711 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
3717 case OBD_CLEANUP_EARLY: {
3718 struct obd_import *imp;
3719 imp = obd->u.cli.cl_import;
3720 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
3721 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
3722 ptlrpc_deactivate_import(imp);
3723 spin_lock(&imp->imp_lock);
3724 imp->imp_pingable = 0;
3725 spin_unlock(&imp->imp_lock);
3728 case OBD_CLEANUP_EXPORTS: {
3729 /* If we set up but never connected, the
3730 client import will not have been cleaned. */
3731 if (obd->u.cli.cl_import) {
3732 struct obd_import *imp;
3733 imp = obd->u.cli.cl_import;
3734 CDEBUG(D_CONFIG, "%s: client import never connected\n",
3736 ptlrpc_invalidate_import(imp);
3737 ptlrpc_free_rq_pool(imp->imp_rq_pool);
3738 class_destroy_import(imp);
3739 obd->u.cli.cl_import = NULL;
3743 case OBD_CLEANUP_SELF_EXP:
3744 rc = obd_llog_finish(obd, 0);
3746 CERROR("failed to cleanup llogging subsystems\n");
3748 case OBD_CLEANUP_OBD:
3754 int osc_cleanup(struct obd_device *obd)
3756 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3760 ptlrpc_lprocfs_unregister_obd(obd);
3761 lprocfs_obd_cleanup(obd);
3763 spin_lock(&oscc->oscc_lock);
3764 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
3765 oscc->oscc_flags |= OSCC_FLAG_EXITING;
3766 spin_unlock(&oscc->oscc_lock);
3768 /* free memory of osc quota cache */
3769 lquota_cleanup(quota_interface, obd);
3771 rc = client_obd_cleanup(obd);
3777 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
3779 struct lustre_cfg *lcfg = buf;
3780 struct lprocfs_static_vars lvars;
3783 lprocfs_init_vars(osc, &lvars);
3785 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars, lcfg, obd);
3789 struct obd_ops osc_obd_ops = {
3790 .o_owner = THIS_MODULE,
3791 .o_setup = osc_setup,
3792 .o_precleanup = osc_precleanup,
3793 .o_cleanup = osc_cleanup,
3794 .o_add_conn = client_import_add_conn,
3795 .o_del_conn = client_import_del_conn,
3796 .o_connect = client_connect_import,
3797 .o_reconnect = osc_reconnect,
3798 .o_disconnect = osc_disconnect,
3799 .o_statfs = osc_statfs,
3800 .o_statfs_async = osc_statfs_async,
3801 .o_packmd = osc_packmd,
3802 .o_unpackmd = osc_unpackmd,
3803 .o_precreate = osc_precreate,
3804 .o_create = osc_create,
3805 .o_destroy = osc_destroy,
3806 .o_getattr = osc_getattr,
3807 .o_getattr_async = osc_getattr_async,
3808 .o_setattr = osc_setattr,
3809 .o_setattr_async = osc_setattr_async,
3811 .o_brw_async = osc_brw_async,
3812 .o_prep_async_page = osc_prep_async_page,
3813 .o_queue_async_io = osc_queue_async_io,
3814 .o_set_async_flags = osc_set_async_flags,
3815 .o_queue_group_io = osc_queue_group_io,
3816 .o_trigger_group_io = osc_trigger_group_io,
3817 .o_teardown_async_page = osc_teardown_async_page,
3818 .o_punch = osc_punch,
3820 .o_enqueue = osc_enqueue,
3821 .o_match = osc_match,
3822 .o_change_cbdata = osc_change_cbdata,
3823 .o_cancel = osc_cancel,
3824 .o_cancel_unused = osc_cancel_unused,
3825 .o_join_lru = osc_join_lru,
3826 .o_iocontrol = osc_iocontrol,
3827 .o_get_info = osc_get_info,
3828 .o_set_info_async = osc_set_info_async,
3829 .o_import_event = osc_import_event,
3830 .o_llog_init = osc_llog_init,
3831 .o_llog_finish = osc_llog_finish,
3832 .o_process_config = osc_process_config,
3834 int __init osc_init(void)
3836 struct lprocfs_static_vars lvars;
3840 lprocfs_init_vars(osc, &lvars);
3842 request_module("lquota");
3843 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
3844 lquota_init(quota_interface);
3845 init_obd_quota_ops(quota_interface, &osc_obd_ops);
3847 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
3848 LUSTRE_OSC_NAME, NULL);
3850 if (quota_interface)
3851 PORTAL_SYMBOL_PUT(osc_quota_interface);
3859 static void /*__exit*/ osc_exit(void)
3861 lquota_exit(quota_interface);
3862 if (quota_interface)
3863 PORTAL_SYMBOL_PUT(osc_quota_interface);
3865 class_unregister_type(LUSTRE_OSC_NAME);
3868 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
3869 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3870 MODULE_LICENSE("GPL");
3872 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob