4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Implementation of cl_io for OSC layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
42 #define DEBUG_SUBSYSTEM S_OSC
44 #include "osc_cl_internal.h"
50 /*****************************************************************************
56 static struct osc_req *cl2osc_req(const struct cl_req_slice *slice)
58 LINVRNT(slice->crs_dev->cd_lu_dev.ld_type == &osc_device_type);
59 return container_of0(slice, struct osc_req, or_cl);
62 static struct osc_io *cl2osc_io(const struct lu_env *env,
63 const struct cl_io_slice *slice)
65 struct osc_io *oio = container_of0(slice, struct osc_io, oi_cl);
66 LINVRNT(oio == osc_env_io(env));
70 static struct osc_page *osc_cl_page_osc(struct cl_page *page,
71 struct osc_object *osc)
73 const struct cl_page_slice *slice;
76 slice = cl_object_page_slice(&osc->oo_cl, page);
78 slice = cl_page_at(page, &osc_device_type);
79 LASSERT(slice != NULL);
81 return cl2osc_page(slice);
85 /*****************************************************************************
91 static void osc_io_fini(const struct lu_env *env, const struct cl_io_slice *io)
95 static void osc_read_ahead_release(const struct lu_env *env,
98 struct ldlm_lock *dlmlock = cbdata;
99 struct lustre_handle lockh;
101 ldlm_lock2handle(dlmlock, &lockh);
102 ldlm_lock_decref(&lockh, LCK_PR);
103 LDLM_LOCK_PUT(dlmlock);
106 static int osc_io_read_ahead(const struct lu_env *env,
107 const struct cl_io_slice *ios,
108 pgoff_t start, struct cl_read_ahead *ra)
110 struct osc_object *osc = cl2osc(ios->cis_obj);
111 struct ldlm_lock *dlmlock;
112 int result = -ENODATA;
115 dlmlock = osc_dlmlock_at_pgoff(env, osc, start, 0);
116 if (dlmlock != NULL) {
117 if (dlmlock->l_req_mode != LCK_PR) {
118 struct lustre_handle lockh;
119 ldlm_lock2handle(dlmlock, &lockh);
120 ldlm_lock_addref(&lockh, LCK_PR);
121 ldlm_lock_decref(&lockh, dlmlock->l_req_mode);
124 ra->cra_end = cl_index(osc2cl(osc),
125 dlmlock->l_policy_data.l_extent.end);
126 ra->cra_release = osc_read_ahead_release;
127 ra->cra_cbdata = dlmlock;
135 * An implementation of cl_io_operations::cio_io_submit() method for osc
136 * layer. Iterates over pages in the in-queue, prepares each for io by calling
137 * cl_page_prep() and then either submits them through osc_io_submit_page()
138 * or, if page is already submitted, changes osc flags through
139 * osc_set_async_flags().
141 static int osc_io_submit(const struct lu_env *env,
142 const struct cl_io_slice *ios,
143 enum cl_req_type crt, struct cl_2queue *queue)
145 struct cl_page *page;
147 struct client_obd *cli = NULL;
148 struct osc_object *osc = NULL; /* to keep gcc happy */
149 struct osc_page *opg;
151 struct list_head list = LIST_HEAD_INIT(list);
153 struct cl_page_list *qin = &queue->c2_qin;
154 struct cl_page_list *qout = &queue->c2_qout;
155 unsigned int queued = 0;
159 unsigned int max_pages;
161 LASSERT(qin->pl_nr > 0);
163 CDEBUG(D_CACHE, "%d %d\n", qin->pl_nr, crt);
165 osc = cl2osc(ios->cis_obj);
167 max_pages = cli->cl_max_pages_per_rpc;
169 cmd = crt == CRT_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ;
170 brw_flags = osc_io_srvlock(cl2osc_io(env, ios)) ? OBD_BRW_SRVLOCK : 0;
173 * NOTE: here @page is a top-level page. This is done to avoid
174 * creation of sub-page-list.
176 cl_page_list_for_each_safe(page, tmp, qin) {
177 struct osc_async_page *oap;
183 opg = osc_cl_page_osc(page, osc);
185 LASSERT(osc == oap->oap_obj);
187 if (!list_empty(&oap->oap_pending_item) ||
188 !list_empty(&oap->oap_rpc_item)) {
189 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
195 result = cl_page_prep(env, io, page, crt);
198 if (result != -EALREADY)
201 * Handle -EALREADY error: for read case, the page is
202 * already in UPTODATE state; for write, the page
209 spin_lock(&oap->oap_lock);
210 oap->oap_async_flags = ASYNC_URGENT|ASYNC_READY;
211 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
212 spin_unlock(&oap->oap_lock);
214 osc_page_submit(env, opg, crt, brw_flags);
215 list_add_tail(&oap->oap_pending_item, &list);
217 if (page->cp_sync_io != NULL)
218 cl_page_list_move(qout, qin, page);
220 cl_page_list_del(env, qin, page);
222 if (++queued == max_pages) {
224 result = osc_queue_sync_pages(env, osc, &list, cmd,
232 result = osc_queue_sync_pages(env, osc, &list, cmd, brw_flags);
234 CDEBUG(D_INFO, "%d/%d %d\n", qin->pl_nr, qout->pl_nr, result);
235 return qout->pl_nr > 0 ? 0 : result;
239 * This is called when a page is accessed within file in a way that creates
240 * new page, if one were missing (i.e., if there were a hole at that place in
241 * the file, or accessed page is beyond the current file size).
243 * Expand stripe KMS if necessary.
245 static void osc_page_touch_at(const struct lu_env *env,
246 struct cl_object *obj, pgoff_t idx, size_t to)
248 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
249 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
253 /* offset within stripe */
254 kms = cl_offset(obj, idx) + to;
256 cl_object_attr_lock(obj);
260 * ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
264 CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n",
265 kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
266 loi->loi_lvb.lvb_size);
268 attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
269 valid = CAT_MTIME | CAT_CTIME;
270 if (kms > loi->loi_kms) {
274 if (kms > loi->loi_lvb.lvb_size) {
275 attr->cat_size = kms;
278 cl_object_attr_update(env, obj, attr, valid);
279 cl_object_attr_unlock(obj);
282 static int osc_io_commit_async(const struct lu_env *env,
283 const struct cl_io_slice *ios,
284 struct cl_page_list *qin, int from, int to,
287 struct cl_io *io = ios->cis_io;
288 struct osc_io *oio = cl2osc_io(env, ios);
289 struct osc_object *osc = cl2osc(ios->cis_obj);
290 struct cl_page *page;
291 struct cl_page *last_page;
292 struct osc_page *opg;
296 LASSERT(qin->pl_nr > 0);
298 /* Handle partial page cases */
299 last_page = cl_page_list_last(qin);
300 if (oio->oi_lockless) {
301 page = cl_page_list_first(qin);
302 if (page == last_page) {
303 cl_page_clip(env, page, from, to);
306 cl_page_clip(env, page, from, PAGE_SIZE);
308 cl_page_clip(env, last_page, 0, to);
312 while (qin->pl_nr > 0) {
313 struct osc_async_page *oap;
315 page = cl_page_list_first(qin);
316 opg = osc_cl_page_osc(page, osc);
319 if (!list_empty(&oap->oap_rpc_item)) {
320 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
326 /* The page may be already in dirty cache. */
327 if (list_empty(&oap->oap_pending_item)) {
328 result = osc_page_cache_add(env, &opg->ops_cl, io);
333 osc_page_touch_at(env, osc2cl(osc), osc_index(opg),
334 page == last_page ? to : PAGE_SIZE);
336 cl_page_list_del(env, qin, page);
338 (*cb)(env, io, page);
339 /* Can't access page any more. Page can be in transfer and
340 * complete at any time. */
343 /* for sync write, kernel will wait for this page to be flushed before
344 * osc_io_end() is called, so release it earlier.
345 * for mkwrite(), it's known there is no further pages. */
346 if (cl_io_is_sync_write(io) && oio->oi_active != NULL) {
347 osc_extent_release(env, oio->oi_active);
348 oio->oi_active = NULL;
351 CDEBUG(D_INFO, "%d %d\n", qin->pl_nr, result);
355 static int osc_io_rw_iter_init(const struct lu_env *env,
356 const struct cl_io_slice *ios)
358 struct cl_io *io = ios->cis_io;
359 struct osc_io *oio = osc_env_io(env);
360 struct osc_object *osc = cl2osc(ios->cis_obj);
361 struct client_obd *cli = osc_cli(osc);
363 unsigned long npages;
364 unsigned long max_pages;
367 if (cl_io_is_append(io))
370 npages = io->u.ci_rw.crw_count >> PAGE_CACHE_SHIFT;
371 if (io->u.ci_rw.crw_pos & ~PAGE_MASK)
374 max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
375 if (npages > max_pages)
378 c = atomic_long_read(cli->cl_lru_left);
379 if (c < npages && osc_lru_reclaim(cli) > 0)
380 c = atomic_long_read(cli->cl_lru_left);
381 while (c >= npages) {
382 if (c == atomic_long_cmpxchg(cli->cl_lru_left, c, c - npages)) {
383 oio->oi_lru_reserved = npages;
386 c = atomic_long_read(cli->cl_lru_left);
392 static void osc_io_rw_iter_fini(const struct lu_env *env,
393 const struct cl_io_slice *ios)
395 struct osc_io *oio = osc_env_io(env);
396 struct osc_object *osc = cl2osc(ios->cis_obj);
397 struct client_obd *cli = osc_cli(osc);
399 if (oio->oi_lru_reserved > 0) {
400 atomic_long_add(oio->oi_lru_reserved, cli->cl_lru_left);
401 oio->oi_lru_reserved = 0;
403 oio->oi_write_osclock = NULL;
406 static int osc_io_fault_start(const struct lu_env *env,
407 const struct cl_io_slice *ios)
410 struct cl_fault_io *fio;
414 fio = &io->u.ci_fault;
415 CDEBUG(D_INFO, "%lu %d %zu\n",
416 fio->ft_index, fio->ft_writable, fio->ft_nob);
418 * If mapping is writeable, adjust kms to cover this page,
419 * but do not extend kms beyond actual file size.
422 if (fio->ft_writable)
423 osc_page_touch_at(env, ios->cis_obj,
424 fio->ft_index, fio->ft_nob);
428 static int osc_async_upcall(void *a, int rc)
430 struct osc_async_cbargs *args = a;
433 complete(&args->opc_sync);
438 * Checks that there are no pages being written in the extent being truncated.
440 static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
441 struct osc_page *ops , void *cbdata)
443 struct cl_page *page = ops->ops_cl.cpl_page;
444 struct osc_async_page *oap;
445 __u64 start = *(__u64 *)cbdata;
448 if (oap->oap_cmd & OBD_BRW_WRITE &&
449 !list_empty(&oap->oap_pending_item))
450 CL_PAGE_DEBUG(D_ERROR, env, page, "exists " LPU64 "/%s.\n",
451 start, current->comm);
453 if (PageLocked(page->cp_vmpage))
454 CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n",
455 ops, osc_index(ops), oap->oap_cmd & OBD_BRW_RWMASK);
457 return CLP_GANG_OKAY;
460 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
461 struct osc_io *oio, __u64 size)
463 struct cl_object *clob;
467 clob = oio->oi_cl.cis_obj;
468 start = cl_index(clob, size);
469 partial = cl_offset(clob, start) < size;
472 * Complain if there are pages in the truncated region.
474 osc_page_gang_lookup(env, io, cl2osc(clob),
475 start + partial, CL_PAGE_EOF,
476 trunc_check_cb, (void *)&size);
479 static int osc_io_setattr_start(const struct lu_env *env,
480 const struct cl_io_slice *slice)
482 struct cl_io *io = slice->cis_io;
483 struct osc_io *oio = cl2osc_io(env, slice);
484 struct cl_object *obj = slice->cis_obj;
485 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
486 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
487 struct obdo *oa = &oio->oi_oa;
488 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
489 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
490 unsigned int ia_valid = io->u.ci_setattr.sa_valid;
492 struct obd_info oinfo = { { { 0 } } };
494 /* truncate cache dirty pages first */
495 if (cl_io_is_trunc(io))
496 result = osc_cache_truncate_start(env, oio, cl2osc(obj), size);
498 if (result == 0 && oio->oi_lockless == 0) {
499 cl_object_attr_lock(obj);
500 result = cl_object_attr_get(env, obj, attr);
502 struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
503 unsigned int cl_valid = 0;
505 if (ia_valid & ATTR_SIZE) {
506 attr->cat_size = attr->cat_kms = size;
507 cl_valid = (CAT_SIZE | CAT_KMS);
509 if (ia_valid & ATTR_MTIME_SET) {
510 attr->cat_mtime = lvb->lvb_mtime;
511 cl_valid |= CAT_MTIME;
513 if (ia_valid & ATTR_ATIME_SET) {
514 attr->cat_atime = lvb->lvb_atime;
515 cl_valid |= CAT_ATIME;
517 if (ia_valid & ATTR_CTIME_SET) {
518 attr->cat_ctime = lvb->lvb_ctime;
519 cl_valid |= CAT_CTIME;
521 result = cl_object_attr_update(env, obj, attr,
524 cl_object_attr_unlock(obj);
526 memset(oa, 0, sizeof(*oa));
528 oa->o_oi = loi->loi_oi;
529 obdo_set_parent_fid(oa, io->u.ci_setattr.sa_parent_fid);
530 oa->o_stripe_idx = io->u.ci_setattr.sa_stripe_index;
531 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
532 if (ia_valid & ATTR_CTIME) {
533 oa->o_valid |= OBD_MD_FLCTIME;
534 oa->o_ctime = attr->cat_ctime;
536 if (ia_valid & ATTR_ATIME) {
537 oa->o_valid |= OBD_MD_FLATIME;
538 oa->o_atime = attr->cat_atime;
540 if (ia_valid & ATTR_MTIME) {
541 oa->o_valid |= OBD_MD_FLMTIME;
542 oa->o_mtime = attr->cat_mtime;
544 if (ia_valid & ATTR_SIZE) {
546 oa->o_blocks = OBD_OBJECT_EOF;
547 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
549 if (oio->oi_lockless) {
550 oa->o_flags = OBD_FL_SRVLOCK;
551 oa->o_valid |= OBD_MD_FLFLAGS;
554 LASSERT(oio->oi_lockless == 0);
557 if (ia_valid & ATTR_ATTR_FLAG) {
558 oa->o_flags = io->u.ci_setattr.sa_attr_flags;
559 oa->o_valid |= OBD_MD_FLFLAGS;
563 oinfo.oi_capa = io->u.ci_setattr.sa_capa;
564 init_completion(&cbargs->opc_sync);
566 if (ia_valid & ATTR_SIZE)
567 result = osc_punch_base(osc_export(cl2osc(obj)),
568 &oinfo, osc_async_upcall,
569 cbargs, PTLRPCD_SET);
571 result = osc_setattr_async(osc_export(cl2osc(obj)),
574 cbargs, PTLRPCD_SET);
575 cbargs->opc_rpc_sent = result == 0;
580 static void osc_io_setattr_end(const struct lu_env *env,
581 const struct cl_io_slice *slice)
583 struct cl_io *io = slice->cis_io;
584 struct osc_io *oio = cl2osc_io(env, slice);
585 struct cl_object *obj = slice->cis_obj;
586 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
589 if (cbargs->opc_rpc_sent) {
590 wait_for_completion(&cbargs->opc_sync);
591 result = io->ci_result = cbargs->opc_rc;
594 if (oio->oi_lockless) {
595 /* lockless truncate */
596 struct osc_device *osd = lu2osc_dev(obj->co_lu.lo_dev);
598 LASSERT(cl_io_is_trunc(io));
599 /* XXX: Need a lock. */
600 osd->od_stats.os_lockless_truncates++;
604 if (cl_io_is_trunc(io)) {
605 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
606 osc_trunc_check(env, io, oio, size);
607 if (oio->oi_trunc != NULL) {
608 osc_cache_truncate_end(env, oio, cl2osc(obj));
609 oio->oi_trunc = NULL;
614 struct osc_data_version_args {
615 struct osc_io *dva_oio;
619 osc_data_version_interpret(const struct lu_env *env, struct ptlrpc_request *req,
622 struct osc_data_version_args *dva = arg;
623 struct osc_io *oio = dva->dva_oio;
624 const struct ost_body *body;
630 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
632 GOTO(out, rc = -EPROTO);
634 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, &oio->oi_oa,
638 oio->oi_cbarg.opc_rc = rc;
639 complete(&oio->oi_cbarg.opc_sync);
644 static int osc_io_data_version_start(const struct lu_env *env,
645 const struct cl_io_slice *slice)
647 struct cl_data_version_io *dv = &slice->cis_io->u.ci_data_version;
648 struct osc_io *oio = cl2osc_io(env, slice);
649 struct obdo *oa = &oio->oi_oa;
650 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
651 struct osc_object *obj = cl2osc(slice->cis_obj);
652 struct lov_oinfo *loi = obj->oo_oinfo;
653 struct obd_export *exp = osc_export(obj);
654 struct ptlrpc_request *req;
655 struct ost_body *body;
656 struct osc_data_version_args *dva;
660 memset(oa, 0, sizeof(*oa));
661 oa->o_oi = loi->loi_oi;
662 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
664 if (dv->dv_flags & (LL_DV_RD_FLUSH | LL_DV_WR_FLUSH)) {
665 oa->o_valid |= OBD_MD_FLFLAGS;
666 oa->o_flags |= OBD_FL_SRVLOCK;
667 if (dv->dv_flags & LL_DV_WR_FLUSH)
668 oa->o_flags |= OBD_FL_FLUSH;
671 init_completion(&cbargs->opc_sync);
673 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
677 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
679 ptlrpc_request_free(req);
683 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
684 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
686 ptlrpc_request_set_replen(req);
687 req->rq_interpret_reply = osc_data_version_interpret;
688 CLASSERT(sizeof(*dva) <= sizeof(req->rq_async_args));
689 dva = ptlrpc_req_async_args(req);
692 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
697 static void osc_io_data_version_end(const struct lu_env *env,
698 const struct cl_io_slice *slice)
700 struct cl_data_version_io *dv = &slice->cis_io->u.ci_data_version;
701 struct osc_io *oio = cl2osc_io(env, slice);
702 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
705 wait_for_completion(&cbargs->opc_sync);
707 if (cbargs->opc_rc != 0) {
708 slice->cis_io->ci_result = cbargs->opc_rc;
709 } else if (!(oio->oi_oa.o_valid & OBD_MD_FLDATAVERSION)) {
710 slice->cis_io->ci_result = -EOPNOTSUPP;
712 dv->dv_data_version = oio->oi_oa.o_data_version;
713 slice->cis_io->ci_result = 0;
719 static int osc_io_read_start(const struct lu_env *env,
720 const struct cl_io_slice *slice)
722 struct cl_object *obj = slice->cis_obj;
723 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
727 if (!slice->cis_io->ci_noatime) {
728 cl_object_attr_lock(obj);
729 attr->cat_atime = LTIME_S(CFS_CURRENT_TIME);
730 rc = cl_object_attr_update(env, obj, attr, CAT_ATIME);
731 cl_object_attr_unlock(obj);
737 static int osc_io_write_start(const struct lu_env *env,
738 const struct cl_io_slice *slice)
740 struct cl_object *obj = slice->cis_obj;
741 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
745 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
746 cl_object_attr_lock(obj);
747 attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
748 rc = cl_object_attr_update(env, obj, attr, CAT_MTIME | CAT_CTIME);
749 cl_object_attr_unlock(obj);
754 static int osc_fsync_ost(const struct lu_env *env, struct osc_object *obj,
755 struct cl_fsync_io *fio)
757 struct osc_io *oio = osc_env_io(env);
758 struct obdo *oa = &oio->oi_oa;
759 struct obd_info *oinfo = &oio->oi_info;
760 struct lov_oinfo *loi = obj->oo_oinfo;
761 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
765 memset(oa, 0, sizeof(*oa));
766 oa->o_oi = loi->loi_oi;
767 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
769 /* reload size abd blocks for start and end of sync range */
770 oa->o_size = fio->fi_start;
771 oa->o_blocks = fio->fi_end;
772 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
774 obdo_set_parent_fid(oa, fio->fi_fid);
776 memset(oinfo, 0, sizeof(*oinfo));
778 oinfo->oi_capa = fio->fi_capa;
779 init_completion(&cbargs->opc_sync);
781 rc = osc_sync_base(osc_export(obj), oinfo, osc_async_upcall, cbargs,
786 static int osc_io_fsync_start(const struct lu_env *env,
787 const struct cl_io_slice *slice)
789 struct cl_io *io = slice->cis_io;
790 struct cl_fsync_io *fio = &io->u.ci_fsync;
791 struct cl_object *obj = slice->cis_obj;
792 struct osc_object *osc = cl2osc(obj);
793 pgoff_t start = cl_index(obj, fio->fi_start);
794 pgoff_t end = cl_index(obj, fio->fi_end);
798 if (fio->fi_end == OBD_OBJECT_EOF)
801 result = osc_cache_writeback_range(env, osc, start, end, 0,
802 fio->fi_mode == CL_FSYNC_DISCARD);
804 fio->fi_nr_written += result;
807 if (fio->fi_mode == CL_FSYNC_ALL) {
810 /* we have to wait for writeback to finish before we can
811 * send OST_SYNC RPC. This is bad because it causes extents
812 * to be written osc by osc. However, we usually start
813 * writeback before CL_FSYNC_ALL so this won't have any real
815 rc = osc_cache_wait_range(env, osc, start, end);
818 rc = osc_fsync_ost(env, osc, fio);
826 static void osc_io_fsync_end(const struct lu_env *env,
827 const struct cl_io_slice *slice)
829 struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync;
830 struct cl_object *obj = slice->cis_obj;
831 pgoff_t start = cl_index(obj, fio->fi_start);
832 pgoff_t end = cl_index(obj, fio->fi_end);
835 if (fio->fi_mode == CL_FSYNC_LOCAL) {
836 result = osc_cache_wait_range(env, cl2osc(obj), start, end);
837 } else if (fio->fi_mode == CL_FSYNC_ALL) {
838 struct osc_io *oio = cl2osc_io(env, slice);
839 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
841 wait_for_completion(&cbargs->opc_sync);
843 result = cbargs->opc_rc;
845 slice->cis_io->ci_result = result;
848 static void osc_io_end(const struct lu_env *env,
849 const struct cl_io_slice *slice)
851 struct osc_io *oio = cl2osc_io(env, slice);
853 if (oio->oi_active) {
854 osc_extent_release(env, oio->oi_active);
855 oio->oi_active = NULL;
859 static const struct cl_io_operations osc_io_ops = {
862 .cio_start = osc_io_read_start,
863 .cio_fini = osc_io_fini
866 .cio_iter_init = osc_io_rw_iter_init,
867 .cio_iter_fini = osc_io_rw_iter_fini,
868 .cio_start = osc_io_write_start,
869 .cio_end = osc_io_end,
870 .cio_fini = osc_io_fini
873 .cio_start = osc_io_setattr_start,
874 .cio_end = osc_io_setattr_end
876 [CIT_DATA_VERSION] = {
877 .cio_start = osc_io_data_version_start,
878 .cio_end = osc_io_data_version_end,
881 .cio_start = osc_io_fault_start,
882 .cio_end = osc_io_end,
883 .cio_fini = osc_io_fini
886 .cio_start = osc_io_fsync_start,
887 .cio_end = osc_io_fsync_end,
888 .cio_fini = osc_io_fini
891 .cio_fini = osc_io_fini
894 .cio_read_ahead = osc_io_read_ahead,
895 .cio_submit = osc_io_submit,
896 .cio_commit_async = osc_io_commit_async
899 /*****************************************************************************
901 * Transfer operations.
905 static int osc_req_prep(const struct lu_env *env,
906 const struct cl_req_slice *slice)
911 static void osc_req_completion(const struct lu_env *env,
912 const struct cl_req_slice *slice, int ioret)
916 or = cl2osc_req(slice);
917 OBD_SLAB_FREE_PTR(or, osc_req_kmem);
921 * Implementation of struct cl_req_operations::cro_attr_set() for osc
922 * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
925 static void osc_req_attr_set(const struct lu_env *env,
926 const struct cl_req_slice *slice,
927 const struct cl_object *obj,
928 struct cl_req_attr *attr, u64 flags)
930 struct lov_oinfo *oinfo;
931 struct cl_req *clerq;
932 struct cl_page *apage; /* _some_ page in @clerq */
933 struct ldlm_lock *lock; /* _some_ lock protecting @apage */
934 struct osc_page *opg;
938 oinfo = cl2osc(obj)->oo_oinfo;
939 lvb = &oinfo->loi_lvb;
942 if ((flags & OBD_MD_FLMTIME) != 0) {
943 oa->o_mtime = lvb->lvb_mtime;
944 oa->o_valid |= OBD_MD_FLMTIME;
946 if ((flags & OBD_MD_FLATIME) != 0) {
947 oa->o_atime = lvb->lvb_atime;
948 oa->o_valid |= OBD_MD_FLATIME;
950 if ((flags & OBD_MD_FLCTIME) != 0) {
951 oa->o_ctime = lvb->lvb_ctime;
952 oa->o_valid |= OBD_MD_FLCTIME;
954 if (flags & OBD_MD_FLGROUP) {
955 ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
956 oa->o_valid |= OBD_MD_FLGROUP;
958 if (flags & OBD_MD_FLID) {
959 ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
960 oa->o_valid |= OBD_MD_FLID;
962 if (flags & OBD_MD_FLHANDLE) {
963 clerq = slice->crs_req;
964 LASSERT(!list_empty(&clerq->crq_pages));
965 apage = container_of(clerq->crq_pages.next,
966 struct cl_page, cp_flight);
967 opg = osc_cl_page_osc(apage, NULL);
968 lock = osc_dlmlock_at_pgoff(env, cl2osc(obj), osc_index(opg),
969 OSC_DAP_FL_TEST_LOCK | OSC_DAP_FL_CANCELING);
970 if (lock == NULL && !opg->ops_srvlock) {
971 struct ldlm_resource *res;
972 struct ldlm_res_id *resname;
974 CL_PAGE_DEBUG(D_ERROR, env, apage, "uncovered page!\n");
976 resname = &osc_env_info(env)->oti_resname;
977 ostid_build_res_name(&oinfo->loi_oi, resname);
978 res = ldlm_resource_get(
979 osc_export(cl2osc(obj))->exp_obd->obd_namespace,
980 NULL, resname, LDLM_EXTENT, 0);
981 ldlm_resource_dump(D_ERROR, res);
983 libcfs_debug_dumpstack(NULL);
987 /* check for lockless io. */
989 oa->o_handle = lock->l_remote_handle;
990 oa->o_valid |= OBD_MD_FLHANDLE;
996 static const struct cl_req_operations osc_req_ops = {
997 .cro_prep = osc_req_prep,
998 .cro_attr_set = osc_req_attr_set,
999 .cro_completion = osc_req_completion
1003 int osc_io_init(const struct lu_env *env,
1004 struct cl_object *obj, struct cl_io *io)
1006 struct osc_io *oio = osc_env_io(env);
1008 CL_IO_SLICE_CLEAN(oio, oi_cl);
1009 cl_io_slice_add(io, &oio->oi_cl, obj, &osc_io_ops);
1013 int osc_req_init(const struct lu_env *env, struct cl_device *dev,
1019 OBD_SLAB_ALLOC_PTR_GFP(or, osc_req_kmem, GFP_NOFS);
1021 cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);