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
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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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, 2013, 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)
72 const struct cl_page_slice *slice;
74 slice = cl_page_at(page, &osc_device_type);
75 LASSERT(slice != NULL);
77 return cl2osc_page(slice);
81 /*****************************************************************************
87 static void osc_io_fini(const struct lu_env *env, const struct cl_io_slice *io)
92 * An implementation of cl_io_operations::cio_io_submit() method for osc
93 * layer. Iterates over pages in the in-queue, prepares each for io by calling
94 * cl_page_prep() and then either submits them through osc_io_submit_page()
95 * or, if page is already submitted, changes osc flags through
96 * osc_set_async_flags().
98 static int osc_io_submit(const struct lu_env *env,
99 const struct cl_io_slice *ios,
100 enum cl_req_type crt, struct cl_2queue *queue)
102 struct cl_page *page;
104 struct client_obd *cli = NULL;
105 struct osc_object *osc = NULL; /* to keep gcc happy */
106 struct osc_page *opg;
108 CFS_LIST_HEAD (list);
110 struct cl_page_list *qin = &queue->c2_qin;
111 struct cl_page_list *qout = &queue->c2_qout;
118 LASSERT(qin->pl_nr > 0);
120 CDEBUG(D_CACHE, "%d %d\n", qin->pl_nr, crt);
122 osc = cl2osc(ios->cis_obj);
124 max_pages = cli->cl_max_pages_per_rpc;
126 cmd = crt == CRT_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ;
127 brw_flags = osc_io_srvlock(cl2osc_io(env, ios)) ? OBD_BRW_SRVLOCK : 0;
130 * NOTE: here @page is a top-level page. This is done to avoid
131 * creation of sub-page-list.
133 cl_page_list_for_each_safe(page, tmp, qin) {
134 struct osc_async_page *oap;
140 opg = osc_cl_page_osc(page);
142 LASSERT(osc == oap->oap_obj);
144 if (!cfs_list_empty(&oap->oap_pending_item) ||
145 !cfs_list_empty(&oap->oap_rpc_item)) {
146 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
152 result = cl_page_prep(env, io, page, crt);
155 if (result != -EALREADY)
158 * Handle -EALREADY error: for read case, the page is
159 * already in UPTODATE state; for write, the page
166 cl_page_list_move(qout, qin, page);
167 spin_lock(&oap->oap_lock);
168 oap->oap_async_flags = ASYNC_URGENT|ASYNC_READY;
169 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
170 spin_unlock(&oap->oap_lock);
172 osc_page_submit(env, opg, crt, brw_flags);
173 cfs_list_add_tail(&oap->oap_pending_item, &list);
174 if (++queued == max_pages) {
176 result = osc_queue_sync_pages(env, osc, &list, cmd,
184 result = osc_queue_sync_pages(env, osc, &list, cmd, brw_flags);
186 CDEBUG(D_INFO, "%d/%d %d\n", qin->pl_nr, qout->pl_nr, result);
187 return qout->pl_nr > 0 ? 0 : result;
191 * This is called when a page is accessed within file in a way that creates
192 * new page, if one were missing (i.e., if there were a hole at that place in
193 * the file, or accessed page is beyond the current file size).
195 * Expand stripe KMS if necessary.
197 static void osc_page_touch_at(const struct lu_env *env,
198 struct cl_object *obj, pgoff_t idx, unsigned to)
200 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
201 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
205 /* offset within stripe */
206 kms = cl_offset(obj, idx) + to;
208 cl_object_attr_lock(obj);
212 * ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
216 CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n",
217 kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
218 loi->loi_lvb.lvb_size);
220 attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
221 valid = CAT_MTIME | CAT_CTIME;
222 if (kms > loi->loi_kms) {
226 if (kms > loi->loi_lvb.lvb_size) {
227 attr->cat_size = kms;
230 cl_object_attr_set(env, obj, attr, valid);
231 cl_object_attr_unlock(obj);
234 static int osc_io_commit_async(const struct lu_env *env,
235 const struct cl_io_slice *ios,
236 struct cl_page_list *qin, int from, int to,
239 struct cl_io *io = ios->cis_io;
240 struct osc_io *oio = cl2osc_io(env, ios);
241 struct osc_object *osc = cl2osc(ios->cis_obj);
242 struct cl_page *page;
243 struct cl_page *last_page;
244 struct osc_page *opg;
248 LASSERT(qin->pl_nr > 0);
250 /* Handle partial page cases */
251 last_page = cl_page_list_last(qin);
252 if (oio->oi_lockless) {
253 page = cl_page_list_first(qin);
254 if (page == last_page) {
255 cl_page_clip(env, page, from, to);
258 cl_page_clip(env, page, from, PAGE_SIZE);
260 cl_page_clip(env, last_page, 0, to);
265 * NOTE: here @page is a top-level page. This is done to avoid
266 * creation of sub-page-list.
268 while (qin->pl_nr > 0) {
269 struct osc_async_page *oap;
271 page = cl_page_list_first(qin);
272 opg = osc_cl_page_osc(page);
275 if (!cfs_list_empty(&oap->oap_rpc_item)) {
276 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
282 /* The page may be already in dirty cache. */
283 if (cfs_list_empty(&oap->oap_pending_item)) {
284 result = osc_page_cache_add(env, &opg->ops_cl, io);
289 osc_page_touch_at(env, osc2cl(osc),
290 opg->ops_cl.cpl_page->cp_index,
291 page == last_page ? to : PAGE_SIZE);
293 cl_page_list_del(env, qin, page);
295 (*cb)(env, io, page);
296 /* Can't access page any more. Page can be in transfer and
297 * complete at any time. */
300 /* for sync write, kernel will wait for this page to be flushed before
301 * osc_io_end() is called, so release it earlier.
302 * for mkwrite(), it's known there is no further pages. */
303 if (cl_io_is_sync_write(io) && oio->oi_active != NULL) {
304 osc_extent_release(env, oio->oi_active);
305 oio->oi_active = NULL;
308 CDEBUG(D_INFO, "%d %d\n", qin->pl_nr, result);
312 static int osc_io_rw_iter_init(const struct lu_env *env,
313 const struct cl_io_slice *ios)
315 struct cl_io *io = ios->cis_io;
316 struct osc_io *oio = osc_env_io(env);
317 struct osc_object *osc = cl2osc(ios->cis_obj);
318 struct client_obd *cli = osc_cli(osc);
321 unsigned int max_pages;
324 if (cl_io_is_append(io))
327 npages = io->u.ci_rw.crw_count >> PAGE_CACHE_SHIFT;
328 if (io->u.ci_rw.crw_pos & ~CFS_PAGE_MASK)
331 max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
332 if (npages > max_pages)
335 c = cfs_atomic_read(cli->cl_lru_left);
336 if (c < npages && osc_lru_reclaim(cli) > 0)
337 c = cfs_atomic_read(cli->cl_lru_left);
338 while (c >= npages) {
339 if (c == cfs_atomic_cmpxchg(cli->cl_lru_left, c, c - npages)) {
340 oio->oi_lru_reserved = npages;
343 c = cfs_atomic_read(cli->cl_lru_left);
349 static void osc_io_rw_iter_fini(const struct lu_env *env,
350 const struct cl_io_slice *ios)
352 struct osc_io *oio = osc_env_io(env);
353 struct osc_object *osc = cl2osc(ios->cis_obj);
354 struct client_obd *cli = osc_cli(osc);
356 if (oio->oi_lru_reserved > 0) {
357 cfs_atomic_add(oio->oi_lru_reserved, cli->cl_lru_left);
358 oio->oi_lru_reserved = 0;
362 static int osc_io_fault_start(const struct lu_env *env,
363 const struct cl_io_slice *ios)
366 struct cl_fault_io *fio;
371 fio = &io->u.ci_fault;
372 CDEBUG(D_INFO, "%lu %d %d\n",
373 fio->ft_index, fio->ft_writable, fio->ft_nob);
375 * If mapping is writeable, adjust kms to cover this page,
376 * but do not extend kms beyond actual file size.
379 if (fio->ft_writable)
380 osc_page_touch_at(env, ios->cis_obj,
381 fio->ft_index, fio->ft_nob);
385 static int osc_async_upcall(void *a, int rc)
387 struct osc_async_cbargs *args = a;
390 complete(&args->opc_sync);
394 #if defined(__KERNEL__)
396 * Checks that there are no pages being written in the extent being truncated.
398 static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
399 struct osc_page *ops , void *cbdata)
401 struct cl_page *page = ops->ops_cl.cpl_page;
402 struct osc_async_page *oap;
403 __u64 start = *(__u64 *)cbdata;
406 if (oap->oap_cmd & OBD_BRW_WRITE &&
407 !cfs_list_empty(&oap->oap_pending_item))
408 CL_PAGE_DEBUG(D_ERROR, env, page, "exists " LPU64 "/%s.\n",
409 start, current->comm);
413 struct page *vmpage = cl_page_vmpage(env, page);
414 if (PageLocked(vmpage))
415 CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n",
417 (oap->oap_cmd & OBD_BRW_RWMASK));
421 return CLP_GANG_OKAY;
424 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
425 struct osc_io *oio, __u64 size)
427 struct cl_object *clob;
431 clob = oio->oi_cl.cis_obj;
432 start = cl_index(clob, size);
433 partial = cl_offset(clob, start) < size;
436 * Complain if there are pages in the truncated region.
438 osc_page_gang_lookup(env, io, cl2osc(clob),
439 start + partial, CL_PAGE_EOF,
440 trunc_check_cb, (void *)&size);
442 #else /* __KERNEL__ */
443 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
444 struct osc_io *oio, __u64 size)
450 static int osc_io_setattr_start(const struct lu_env *env,
451 const struct cl_io_slice *slice)
453 struct cl_io *io = slice->cis_io;
454 struct osc_io *oio = cl2osc_io(env, slice);
455 struct cl_object *obj = slice->cis_obj;
456 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
457 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
458 struct obdo *oa = &oio->oi_oa;
459 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
460 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
461 unsigned int ia_valid = io->u.ci_setattr.sa_valid;
463 struct obd_info oinfo = { { { 0 } } };
465 /* truncate cache dirty pages first */
466 if (cl_io_is_trunc(io))
467 result = osc_cache_truncate_start(env, oio, cl2osc(obj), size);
469 if (result == 0 && oio->oi_lockless == 0) {
470 cl_object_attr_lock(obj);
471 result = cl_object_attr_get(env, obj, attr);
473 struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
474 unsigned int cl_valid = 0;
476 if (ia_valid & ATTR_SIZE) {
477 attr->cat_size = attr->cat_kms = size;
478 cl_valid = (CAT_SIZE | CAT_KMS);
480 if (ia_valid & ATTR_MTIME_SET) {
481 attr->cat_mtime = lvb->lvb_mtime;
482 cl_valid |= CAT_MTIME;
484 if (ia_valid & ATTR_ATIME_SET) {
485 attr->cat_atime = lvb->lvb_atime;
486 cl_valid |= CAT_ATIME;
488 if (ia_valid & ATTR_CTIME_SET) {
489 attr->cat_ctime = lvb->lvb_ctime;
490 cl_valid |= CAT_CTIME;
492 result = cl_object_attr_set(env, obj, attr, cl_valid);
494 cl_object_attr_unlock(obj);
496 memset(oa, 0, sizeof(*oa));
498 oa->o_oi = loi->loi_oi;
499 oa->o_mtime = attr->cat_mtime;
500 oa->o_atime = attr->cat_atime;
501 oa->o_ctime = attr->cat_ctime;
502 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLATIME |
503 OBD_MD_FLCTIME | OBD_MD_FLMTIME;
504 if (ia_valid & ATTR_SIZE) {
506 oa->o_blocks = OBD_OBJECT_EOF;
507 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
509 if (oio->oi_lockless) {
510 oa->o_flags = OBD_FL_SRVLOCK;
511 oa->o_valid |= OBD_MD_FLFLAGS;
514 LASSERT(oio->oi_lockless == 0);
518 oinfo.oi_capa = io->u.ci_setattr.sa_capa;
519 init_completion(&cbargs->opc_sync);
521 if (ia_valid & ATTR_SIZE)
522 result = osc_punch_base(osc_export(cl2osc(obj)),
523 &oinfo, osc_async_upcall,
524 cbargs, PTLRPCD_SET);
526 result = osc_setattr_async_base(osc_export(cl2osc(obj)),
529 cbargs, PTLRPCD_SET);
530 cbargs->opc_rpc_sent = result == 0;
535 static void osc_io_setattr_end(const struct lu_env *env,
536 const struct cl_io_slice *slice)
538 struct cl_io *io = slice->cis_io;
539 struct osc_io *oio = cl2osc_io(env, slice);
540 struct cl_object *obj = slice->cis_obj;
541 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
544 if (cbargs->opc_rpc_sent) {
545 wait_for_completion(&cbargs->opc_sync);
546 result = io->ci_result = cbargs->opc_rc;
549 if (oio->oi_lockless) {
550 /* lockless truncate */
551 struct osc_device *osd = lu2osc_dev(obj->co_lu.lo_dev);
553 LASSERT(cl_io_is_trunc(io));
554 /* XXX: Need a lock. */
555 osd->od_stats.os_lockless_truncates++;
559 if (cl_io_is_trunc(io)) {
560 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
561 osc_trunc_check(env, io, oio, size);
562 if (oio->oi_trunc != NULL) {
563 osc_cache_truncate_end(env, oio, cl2osc(obj));
564 oio->oi_trunc = NULL;
569 static int osc_io_read_start(const struct lu_env *env,
570 const struct cl_io_slice *slice)
572 struct osc_io *oio = cl2osc_io(env, slice);
573 struct cl_object *obj = slice->cis_obj;
574 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
578 if (oio->oi_lockless == 0 && !slice->cis_io->ci_noatime) {
579 cl_object_attr_lock(obj);
580 attr->cat_atime = LTIME_S(CFS_CURRENT_TIME);
581 rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
582 cl_object_attr_unlock(obj);
588 static int osc_io_write_start(const struct lu_env *env,
589 const struct cl_io_slice *slice)
591 struct osc_io *oio = cl2osc_io(env, slice);
592 struct cl_object *obj = slice->cis_obj;
593 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
597 if (oio->oi_lockless == 0) {
598 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
599 cl_object_attr_lock(obj);
600 result = cl_object_attr_get(env, obj, attr);
602 attr->cat_mtime = attr->cat_ctime =
603 LTIME_S(CFS_CURRENT_TIME);
604 result = cl_object_attr_set(env, obj, attr,
605 CAT_MTIME | CAT_CTIME);
607 cl_object_attr_unlock(obj);
612 static int osc_fsync_ost(const struct lu_env *env, struct osc_object *obj,
613 struct cl_fsync_io *fio)
615 struct osc_io *oio = osc_env_io(env);
616 struct obdo *oa = &oio->oi_oa;
617 struct obd_info *oinfo = &oio->oi_info;
618 struct lov_oinfo *loi = obj->oo_oinfo;
619 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
623 memset(oa, 0, sizeof(*oa));
624 oa->o_oi = loi->loi_oi;
625 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
627 /* reload size abd blocks for start and end of sync range */
628 oa->o_size = fio->fi_start;
629 oa->o_blocks = fio->fi_end;
630 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
632 obdo_set_parent_fid(oa, fio->fi_fid);
634 memset(oinfo, 0, sizeof(*oinfo));
636 oinfo->oi_capa = fio->fi_capa;
637 init_completion(&cbargs->opc_sync);
639 rc = osc_sync_base(osc_export(obj), oinfo, osc_async_upcall, cbargs,
644 static int osc_io_fsync_start(const struct lu_env *env,
645 const struct cl_io_slice *slice)
647 struct cl_io *io = slice->cis_io;
648 struct cl_fsync_io *fio = &io->u.ci_fsync;
649 struct cl_object *obj = slice->cis_obj;
650 struct osc_object *osc = cl2osc(obj);
651 pgoff_t start = cl_index(obj, fio->fi_start);
652 pgoff_t end = cl_index(obj, fio->fi_end);
656 if (fio->fi_end == OBD_OBJECT_EOF)
659 result = osc_cache_writeback_range(env, osc, start, end, 0,
660 fio->fi_mode == CL_FSYNC_DISCARD);
662 fio->fi_nr_written += result;
665 if (fio->fi_mode == CL_FSYNC_ALL) {
668 /* we have to wait for writeback to finish before we can
669 * send OST_SYNC RPC. This is bad because it causes extents
670 * to be written osc by osc. However, we usually start
671 * writeback before CL_FSYNC_ALL so this won't have any real
673 rc = osc_cache_wait_range(env, osc, start, end);
676 rc = osc_fsync_ost(env, osc, fio);
684 static void osc_io_fsync_end(const struct lu_env *env,
685 const struct cl_io_slice *slice)
687 struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync;
688 struct cl_object *obj = slice->cis_obj;
689 pgoff_t start = cl_index(obj, fio->fi_start);
690 pgoff_t end = cl_index(obj, fio->fi_end);
693 if (fio->fi_mode == CL_FSYNC_LOCAL) {
694 result = osc_cache_wait_range(env, cl2osc(obj), start, end);
695 } else if (fio->fi_mode == CL_FSYNC_ALL) {
696 struct osc_io *oio = cl2osc_io(env, slice);
697 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
699 wait_for_completion(&cbargs->opc_sync);
701 result = cbargs->opc_rc;
703 slice->cis_io->ci_result = result;
706 static void osc_io_end(const struct lu_env *env,
707 const struct cl_io_slice *slice)
709 struct osc_io *oio = cl2osc_io(env, slice);
711 if (oio->oi_active) {
712 osc_extent_release(env, oio->oi_active);
713 oio->oi_active = NULL;
717 static const struct cl_io_operations osc_io_ops = {
720 .cio_start = osc_io_read_start,
721 .cio_fini = osc_io_fini
724 .cio_iter_init = osc_io_rw_iter_init,
725 .cio_iter_fini = osc_io_rw_iter_fini,
726 .cio_start = osc_io_write_start,
727 .cio_end = osc_io_end,
728 .cio_fini = osc_io_fini
731 .cio_start = osc_io_setattr_start,
732 .cio_end = osc_io_setattr_end
735 .cio_start = osc_io_fault_start,
736 .cio_end = osc_io_end,
737 .cio_fini = osc_io_fini
740 .cio_start = osc_io_fsync_start,
741 .cio_end = osc_io_fsync_end,
742 .cio_fini = osc_io_fini
745 .cio_fini = osc_io_fini
748 .cio_submit = osc_io_submit,
749 .cio_commit_async = osc_io_commit_async
752 /*****************************************************************************
754 * Transfer operations.
758 static int osc_req_prep(const struct lu_env *env,
759 const struct cl_req_slice *slice)
764 static void osc_req_completion(const struct lu_env *env,
765 const struct cl_req_slice *slice, int ioret)
769 or = cl2osc_req(slice);
770 OBD_SLAB_FREE_PTR(or, osc_req_kmem);
774 * Implementation of struct cl_req_operations::cro_attr_set() for osc
775 * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
778 static void osc_req_attr_set(const struct lu_env *env,
779 const struct cl_req_slice *slice,
780 const struct cl_object *obj,
781 struct cl_req_attr *attr, obd_valid flags)
783 struct lov_oinfo *oinfo;
784 struct cl_req *clerq;
785 struct cl_page *apage; /* _some_ page in @clerq */
786 struct cl_lock *lock; /* _some_ lock protecting @apage */
787 struct osc_lock *olck;
788 struct osc_page *opg;
792 oinfo = cl2osc(obj)->oo_oinfo;
793 lvb = &oinfo->loi_lvb;
796 if ((flags & OBD_MD_FLMTIME) != 0) {
797 oa->o_mtime = lvb->lvb_mtime;
798 oa->o_valid |= OBD_MD_FLMTIME;
800 if ((flags & OBD_MD_FLATIME) != 0) {
801 oa->o_atime = lvb->lvb_atime;
802 oa->o_valid |= OBD_MD_FLATIME;
804 if ((flags & OBD_MD_FLCTIME) != 0) {
805 oa->o_ctime = lvb->lvb_ctime;
806 oa->o_valid |= OBD_MD_FLCTIME;
808 if (flags & OBD_MD_FLGROUP) {
809 ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
810 oa->o_valid |= OBD_MD_FLGROUP;
812 if (flags & OBD_MD_FLID) {
813 ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
814 oa->o_valid |= OBD_MD_FLID;
816 if (flags & OBD_MD_FLHANDLE) {
817 clerq = slice->crs_req;
818 LASSERT(!cfs_list_empty(&clerq->crq_pages));
819 apage = container_of(clerq->crq_pages.next,
820 struct cl_page, cp_flight);
821 opg = osc_cl_page_osc(apage);
822 apage = opg->ops_cl.cpl_page; /* now apage is a sub-page */
823 lock = cl_lock_at_page(env, apage->cp_obj, apage, NULL, 1, 1);
825 struct cl_object_header *head;
826 struct cl_lock *scan;
828 head = cl_object_header(apage->cp_obj);
829 cfs_list_for_each_entry(scan, &head->coh_locks,
831 CL_LOCK_DEBUG(D_ERROR, env, scan,
833 CL_PAGE_DEBUG(D_ERROR, env, apage,
834 "dump uncover page!\n");
835 libcfs_debug_dumpstack(NULL);
839 olck = osc_lock_at(lock);
840 LASSERT(olck != NULL);
841 LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL));
842 /* check for lockless io. */
843 if (olck->ols_lock != NULL) {
844 oa->o_handle = olck->ols_lock->l_remote_handle;
845 oa->o_valid |= OBD_MD_FLHANDLE;
847 cl_lock_put(env, lock);
851 static const struct cl_req_operations osc_req_ops = {
852 .cro_prep = osc_req_prep,
853 .cro_attr_set = osc_req_attr_set,
854 .cro_completion = osc_req_completion
858 int osc_io_init(const struct lu_env *env,
859 struct cl_object *obj, struct cl_io *io)
861 struct osc_io *oio = osc_env_io(env);
863 CL_IO_SLICE_CLEAN(oio, oi_cl);
864 cl_io_slice_add(io, &oio->oi_cl, obj, &osc_io_ops);
868 int osc_req_init(const struct lu_env *env, struct cl_device *dev,
874 OBD_SLAB_ALLOC_PTR_GFP(or, osc_req_kmem, __GFP_IO);
876 cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);