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, 2015, 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 LOV layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
42 #define DEBUG_SUBSYSTEM S_LOV
44 #include "lov_cl_internal.h"
50 static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
51 struct lov_io_sub *sub)
54 if (sub->sub_io != NULL) {
55 if (sub->sub_io_initialized) {
56 cl_io_fini(sub->sub_env, sub->sub_io);
57 sub->sub_io_initialized = 0;
58 lio->lis_active_subios--;
60 if (sub->sub_stripe == lio->lis_single_subio_index)
61 lio->lis_single_subio_index = -1;
62 else if (!sub->sub_borrowed)
63 OBD_FREE_PTR(sub->sub_io);
66 if (sub->sub_env != NULL && !IS_ERR(sub->sub_env)) {
67 if (!sub->sub_borrowed)
68 cl_env_put(sub->sub_env, &sub->sub_refcheck);
74 static void lov_io_sub_inherit(struct cl_io *io, struct lov_io *lio,
75 int stripe, loff_t start, loff_t end)
77 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
78 struct cl_io *parent = lio->lis_cl.cis_io;
80 switch (io->ci_type) {
82 io->u.ci_setattr.sa_attr = parent->u.ci_setattr.sa_attr;
83 io->u.ci_setattr.sa_attr_flags =
84 parent->u.ci_setattr.sa_attr_flags;
85 io->u.ci_setattr.sa_valid = parent->u.ci_setattr.sa_valid;
86 io->u.ci_setattr.sa_stripe_index = stripe;
87 io->u.ci_setattr.sa_parent_fid =
88 parent->u.ci_setattr.sa_parent_fid;
89 if (cl_io_is_trunc(io)) {
90 loff_t new_size = parent->u.ci_setattr.sa_attr.lvb_size;
92 new_size = lov_size_to_stripe(lsm, new_size, stripe);
93 io->u.ci_setattr.sa_attr.lvb_size = new_size;
97 case CIT_DATA_VERSION: {
98 io->u.ci_data_version.dv_data_version = 0;
99 io->u.ci_data_version.dv_flags =
100 parent->u.ci_data_version.dv_flags;
104 struct cl_object *obj = parent->ci_obj;
105 loff_t off = cl_offset(obj, parent->u.ci_fault.ft_index);
107 io->u.ci_fault = parent->u.ci_fault;
108 off = lov_size_to_stripe(lsm, off, stripe);
109 io->u.ci_fault.ft_index = cl_index(obj, off);
113 io->u.ci_fsync.fi_start = start;
114 io->u.ci_fsync.fi_end = end;
115 io->u.ci_fsync.fi_fid = parent->u.ci_fsync.fi_fid;
116 io->u.ci_fsync.fi_mode = parent->u.ci_fsync.fi_mode;
121 io->u.ci_wr.wr_sync = cl_io_is_sync_write(parent);
122 if (cl_io_is_append(parent)) {
123 io->u.ci_wr.wr_append = 1;
125 io->u.ci_rw.crw_pos = start;
126 io->u.ci_rw.crw_count = end - start;
131 io->u.ci_ladvise.li_start = start;
132 io->u.ci_ladvise.li_end = end;
133 io->u.ci_ladvise.li_fid = parent->u.ci_ladvise.li_fid;
134 io->u.ci_ladvise.li_advice = parent->u.ci_ladvise.li_advice;
135 io->u.ci_ladvise.li_flags = parent->u.ci_ladvise.li_flags;
143 static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
144 struct lov_io_sub *sub)
146 struct lov_object *lov = lio->lis_object;
147 struct cl_io *sub_io;
148 struct cl_object *sub_obj;
149 struct cl_io *io = lio->lis_cl.cis_io;
150 int stripe = sub->sub_stripe;
153 LASSERT(sub->sub_io == NULL);
154 LASSERT(sub->sub_env == NULL);
155 LASSERT(sub->sub_stripe < lio->lis_stripe_count);
158 if (unlikely(lov_r0(lov)->lo_sub[stripe] == NULL))
161 sub->sub_io_initialized = 0;
162 sub->sub_borrowed = 0;
164 /* obtain new environment */
165 sub->sub_env = cl_env_get(&sub->sub_refcheck);
166 if (IS_ERR(sub->sub_env))
167 GOTO(fini_lov_io, rc = PTR_ERR(sub->sub_env));
170 * First sub-io. Use ->lis_single_subio to
171 * avoid dynamic allocation.
173 if (lio->lis_active_subios == 0) {
174 sub->sub_io = &lio->lis_single_subio;
175 lio->lis_single_subio_index = stripe;
177 OBD_ALLOC_PTR(sub->sub_io);
178 if (sub->sub_io == NULL)
179 GOTO(fini_lov_io, rc = -ENOMEM);
182 sub_obj = lovsub2cl(lov_r0(lov)->lo_sub[stripe]);
183 sub_io = sub->sub_io;
185 sub_io->ci_obj = sub_obj;
186 sub_io->ci_result = 0;
187 sub_io->ci_parent = io;
188 sub_io->ci_lockreq = io->ci_lockreq;
189 sub_io->ci_type = io->ci_type;
190 sub_io->ci_no_srvlock = io->ci_no_srvlock;
191 sub_io->ci_noatime = io->ci_noatime;
193 rc = cl_io_sub_init(sub->sub_env, sub_io, io->ci_type, sub_obj);
195 lio->lis_active_subios++;
196 sub->sub_io_initialized = 1;
201 lov_io_sub_fini(env, lio, sub);
205 struct lov_io_sub *lov_sub_get(const struct lu_env *env,
206 struct lov_io *lio, int stripe)
209 struct lov_io_sub *sub = &lio->lis_subs[stripe];
211 LASSERT(stripe < lio->lis_stripe_count);
214 if (!sub->sub_io_initialized) {
215 sub->sub_stripe = stripe;
216 rc = lov_io_sub_init(env, lio, sub);
226 /*****************************************************************************
232 int lov_page_stripe(const struct cl_page *page)
234 const struct cl_page_slice *slice;
237 slice = cl_page_at(page, &lov_device_type);
238 LASSERT(slice != NULL);
239 LASSERT(slice->cpl_obj != NULL);
241 RETURN(cl2lov_page(slice)->lps_stripe);
244 static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
247 struct lov_stripe_md *lsm;
251 LASSERT(lio->lis_object != NULL);
252 lsm = lio->lis_object->lo_lsm;
255 * Need to be optimized, we can't afford to allocate a piece of memory
256 * when writing a page. -jay
258 OBD_ALLOC_LARGE(lio->lis_subs,
259 lsm->lsm_stripe_count * sizeof lio->lis_subs[0]);
260 if (lio->lis_subs != NULL) {
261 lio->lis_nr_subios = lio->lis_stripe_count;
262 lio->lis_single_subio_index = -1;
263 lio->lis_active_subios = 0;
271 static int lov_io_slice_init(struct lov_io *lio,
272 struct lov_object *obj, struct cl_io *io)
277 lio->lis_object = obj;
279 LASSERT(obj->lo_lsm != NULL);
280 lio->lis_stripe_count = obj->lo_lsm->lsm_stripe_count;
282 switch (io->ci_type) {
285 lio->lis_pos = io->u.ci_rw.crw_pos;
286 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
287 lio->lis_io_endpos = lio->lis_endpos;
288 if (cl_io_is_append(io)) {
289 LASSERT(io->ci_type == CIT_WRITE);
291 /* If there is LOV EA hole, then we may cannot locate
292 * the current file-tail exactly. */
293 if (unlikely(obj->lo_lsm->lsm_pattern &
298 lio->lis_endpos = OBD_OBJECT_EOF;
303 if (cl_io_is_trunc(io))
304 lio->lis_pos = io->u.ci_setattr.sa_attr.lvb_size;
307 lio->lis_endpos = OBD_OBJECT_EOF;
310 case CIT_DATA_VERSION:
312 lio->lis_endpos = OBD_OBJECT_EOF;
316 pgoff_t index = io->u.ci_fault.ft_index;
317 lio->lis_pos = cl_offset(io->ci_obj, index);
318 lio->lis_endpos = cl_offset(io->ci_obj, index + 1);
323 lio->lis_pos = io->u.ci_fsync.fi_start;
324 lio->lis_endpos = io->u.ci_fsync.fi_end;
329 lio->lis_pos = io->u.ci_ladvise.li_start;
330 lio->lis_endpos = io->u.ci_ladvise.li_end;
336 lio->lis_endpos = OBD_OBJECT_EOF;
346 static void lov_io_fini(const struct lu_env *env, const struct cl_io_slice *ios)
348 struct lov_io *lio = cl2lov_io(env, ios);
349 struct lov_object *lov = cl2lov(ios->cis_obj);
353 if (lio->lis_subs != NULL) {
354 for (i = 0; i < lio->lis_nr_subios; i++)
355 lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
356 OBD_FREE_LARGE(lio->lis_subs,
357 lio->lis_nr_subios * sizeof lio->lis_subs[0]);
358 lio->lis_nr_subios = 0;
361 LASSERT(atomic_read(&lov->lo_active_ios) > 0);
362 if (atomic_dec_and_test(&lov->lo_active_ios))
363 wake_up_all(&lov->lo_waitq);
367 static loff_t lov_offset_mod(loff_t val, int delta)
369 if (val != OBD_OBJECT_EOF)
374 static int lov_io_iter_init(const struct lu_env *env,
375 const struct cl_io_slice *ios)
377 struct lov_io *lio = cl2lov_io(env, ios);
378 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
379 struct lov_io_sub *sub;
387 endpos = lov_offset_mod(lio->lis_endpos, -1);
388 for (stripe = 0; stripe < lio->lis_stripe_count; stripe++) {
389 if (!lov_stripe_intersects(lsm, stripe, lio->lis_pos,
390 endpos, &start, &end))
393 if (unlikely(lov_r0(lio->lis_object)->lo_sub[stripe] == NULL)) {
394 if (ios->cis_io->ci_type == CIT_READ ||
395 ios->cis_io->ci_type == CIT_WRITE ||
396 ios->cis_io->ci_type == CIT_FAULT)
402 end = lov_offset_mod(end, +1);
403 sub = lov_sub_get(env, lio, stripe);
409 lov_io_sub_inherit(sub->sub_io, lio, stripe, start, end);
410 rc = cl_io_iter_init(sub->sub_env, sub->sub_io);
412 cl_io_iter_fini(sub->sub_env, sub->sub_io);
416 CDEBUG(D_VFSTRACE, "shrink: %d [%llu, %llu)\n",
419 list_add_tail(&sub->sub_linkage, &lio->lis_active);
424 static int lov_io_rw_iter_init(const struct lu_env *env,
425 const struct cl_io_slice *ios)
427 struct lov_io *lio = cl2lov_io(env, ios);
428 struct cl_io *io = ios->cis_io;
429 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
430 loff_t start = io->u.ci_rw.crw_pos;
432 unsigned long ssize = lsm->lsm_stripe_size;
434 LASSERT(io->ci_type == CIT_READ || io->ci_type == CIT_WRITE);
437 /* fast path for common case. */
438 if (lio->lis_nr_subios != 1 && !cl_io_is_append(io)) {
440 lov_do_div64(start, ssize);
441 next = (start + 1) * ssize;
442 if (next <= start * ssize)
445 io->ci_continue = next < lio->lis_io_endpos;
446 io->u.ci_rw.crw_count = min_t(loff_t, lio->lis_io_endpos,
447 next) - io->u.ci_rw.crw_pos;
448 lio->lis_pos = io->u.ci_rw.crw_pos;
449 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
450 CDEBUG(D_VFSTRACE, "stripe: %llu chunk: [%llu, %llu) "
451 "%llu\n", (__u64)start, lio->lis_pos, lio->lis_endpos,
452 (__u64)lio->lis_io_endpos);
455 * XXX The following call should be optimized: we know, that
456 * [lio->lis_pos, lio->lis_endpos) intersects with exactly one stripe.
458 RETURN(lov_io_iter_init(env, ios));
461 static int lov_io_call(const struct lu_env *env, struct lov_io *lio,
462 int (*iofunc)(const struct lu_env *, struct cl_io *))
464 struct cl_io *parent = lio->lis_cl.cis_io;
465 struct lov_io_sub *sub;
469 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
470 rc = iofunc(sub->sub_env, sub->sub_io);
474 if (parent->ci_result == 0)
475 parent->ci_result = sub->sub_io->ci_result;
480 static int lov_io_lock(const struct lu_env *env, const struct cl_io_slice *ios)
483 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_lock));
486 static int lov_io_start(const struct lu_env *env, const struct cl_io_slice *ios)
489 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_start));
492 static int lov_io_end_wrapper(const struct lu_env *env, struct cl_io *io)
496 * It's possible that lov_io_start() wasn't called against this
497 * sub-io, either because previous sub-io failed, or upper layer
500 if (io->ci_state == CIS_IO_GOING)
503 io->ci_state = CIS_IO_FINISHED;
507 static int lov_io_iter_fini_wrapper(const struct lu_env *env, struct cl_io *io)
509 cl_io_iter_fini(env, io);
513 static int lov_io_unlock_wrapper(const struct lu_env *env, struct cl_io *io)
515 cl_io_unlock(env, io);
519 static void lov_io_end(const struct lu_env *env, const struct cl_io_slice *ios)
523 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_end_wrapper);
528 lov_io_data_version_end(const struct lu_env *env, const struct cl_io_slice *ios)
530 struct lov_io *lio = cl2lov_io(env, ios);
531 struct cl_io *parent = lio->lis_cl.cis_io;
532 struct lov_io_sub *sub;
535 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
536 lov_io_end_wrapper(env, sub->sub_io);
538 parent->u.ci_data_version.dv_data_version +=
539 sub->sub_io->u.ci_data_version.dv_data_version;
541 if (parent->ci_result == 0)
542 parent->ci_result = sub->sub_io->ci_result;
548 static void lov_io_iter_fini(const struct lu_env *env,
549 const struct cl_io_slice *ios)
551 struct lov_io *lio = cl2lov_io(env, ios);
555 rc = lov_io_call(env, lio, lov_io_iter_fini_wrapper);
557 while (!list_empty(&lio->lis_active))
558 list_del_init(lio->lis_active.next);
562 static void lov_io_unlock(const struct lu_env *env,
563 const struct cl_io_slice *ios)
568 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_unlock_wrapper);
573 static int lov_io_read_ahead(const struct lu_env *env,
574 const struct cl_io_slice *ios,
575 pgoff_t start, struct cl_read_ahead *ra)
577 struct lov_io *lio = cl2lov_io(env, ios);
578 struct lov_object *loo = lio->lis_object;
579 struct cl_object *obj = lov2cl(loo);
580 struct lov_layout_raid0 *r0 = lov_r0(loo);
581 struct lov_io_sub *sub;
584 unsigned int pps; /* pages per stripe */
589 stripe = lov_stripe_number(loo->lo_lsm, cl_offset(obj, start));
590 if (unlikely(r0->lo_sub[stripe] == NULL))
593 sub = lov_sub_get(env, lio, stripe);
595 lov_stripe_offset(loo->lo_lsm, cl_offset(obj, start), stripe, &suboff);
596 rc = cl_io_read_ahead(sub->sub_env, sub->sub_io,
597 cl_index(lovsub2cl(r0->lo_sub[stripe]), suboff),
600 CDEBUG(D_READA, DFID " cra_end = %lu, stripes = %d, rc = %d\n",
601 PFID(lu_object_fid(lov2lu(loo))), ra->cra_end, r0->lo_nr, rc);
606 * Adjust the stripe index by layout of raid0. ra->cra_end is the maximum
607 * page index covered by an underlying DLM lock.
608 * This function converts cra_end from stripe level to file level, and
609 * make sure it's not beyond stripe boundary.
611 if (r0->lo_nr == 1) /* single stripe file */
614 /* cra_end is stripe level, convert it into file level */
615 ra_end = ra->cra_end;
616 if (ra_end != CL_PAGE_EOF)
617 ra_end = lov_stripe_pgoff(loo->lo_lsm, ra_end, stripe);
619 pps = loo->lo_lsm->lsm_stripe_size >> PAGE_CACHE_SHIFT;
621 CDEBUG(D_READA, DFID " max_index = %lu, pps = %u, "
622 "stripe_size = %u, stripe no = %u, start index = %lu\n",
623 PFID(lu_object_fid(lov2lu(loo))), ra_end, pps,
624 loo->lo_lsm->lsm_stripe_size, stripe, start);
626 /* never exceed the end of the stripe */
627 ra->cra_end = min_t(pgoff_t, ra_end, start + pps - start % pps - 1);
632 * lov implementation of cl_operations::cio_submit() method. It takes a list
633 * of pages in \a queue, splits it into per-stripe sub-lists, invokes
634 * cl_io_submit() on underlying devices to submit sub-lists, and then splices
637 * Major complication of this function is a need to handle memory cleansing:
638 * cl_io_submit() is called to write out pages as a part of VM memory
639 * reclamation, and hence it may not fail due to memory shortages (system
640 * dead-locks otherwise). To deal with this, some resources (sub-lists,
641 * sub-environment, etc.) are allocated per-device on "startup" (i.e., in a
642 * not-memory cleansing context), and in case of memory shortage, these
643 * pre-allocated resources are used by lov_io_submit() under
644 * lov_device::ld_mutex mutex.
646 static int lov_io_submit(const struct lu_env *env,
647 const struct cl_io_slice *ios,
648 enum cl_req_type crt, struct cl_2queue *queue)
650 struct cl_page_list *qin = &queue->c2_qin;
651 struct lov_io *lio = cl2lov_io(env, ios);
652 struct lov_io_sub *sub;
653 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
654 struct cl_page *page;
659 if (lio->lis_active_subios == 1) {
660 int idx = lio->lis_single_subio_index;
662 LASSERT(idx < lio->lis_nr_subios);
663 sub = lov_sub_get(env, lio, idx);
664 LASSERT(!IS_ERR(sub));
665 LASSERT(sub->sub_io == &lio->lis_single_subio);
666 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
671 LASSERT(lio->lis_subs != NULL);
673 cl_page_list_init(plist);
674 while (qin->pl_nr > 0) {
675 struct cl_2queue *cl2q = &lov_env_info(env)->lti_cl2q;
677 cl_2queue_init(cl2q);
679 page = cl_page_list_first(qin);
680 cl_page_list_move(&cl2q->c2_qin, qin, page);
682 stripe = lov_page_stripe(page);
683 while (qin->pl_nr > 0) {
684 page = cl_page_list_first(qin);
685 if (stripe != lov_page_stripe(page))
688 cl_page_list_move(&cl2q->c2_qin, qin, page);
691 sub = lov_sub_get(env, lio, stripe);
693 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
699 cl_page_list_splice(&cl2q->c2_qin, plist);
700 cl_page_list_splice(&cl2q->c2_qout, &queue->c2_qout);
701 cl_2queue_fini(env, cl2q);
707 cl_page_list_splice(plist, qin);
708 cl_page_list_fini(env, plist);
713 static int lov_io_commit_async(const struct lu_env *env,
714 const struct cl_io_slice *ios,
715 struct cl_page_list *queue, int from, int to,
718 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
719 struct lov_io *lio = cl2lov_io(env, ios);
720 struct lov_io_sub *sub;
721 struct cl_page *page;
725 if (lio->lis_active_subios == 1) {
726 int idx = lio->lis_single_subio_index;
728 LASSERT(idx < lio->lis_nr_subios);
729 sub = lov_sub_get(env, lio, idx);
730 LASSERT(!IS_ERR(sub));
731 LASSERT(sub->sub_io == &lio->lis_single_subio);
732 rc = cl_io_commit_async(sub->sub_env, sub->sub_io, queue,
737 LASSERT(lio->lis_subs != NULL);
739 cl_page_list_init(plist);
740 while (queue->pl_nr > 0) {
744 LASSERT(plist->pl_nr == 0);
745 page = cl_page_list_first(queue);
746 cl_page_list_move(plist, queue, page);
748 stripe = lov_page_stripe(page);
749 while (queue->pl_nr > 0) {
750 page = cl_page_list_first(queue);
751 if (stripe != lov_page_stripe(page))
754 cl_page_list_move(plist, queue, page);
757 if (queue->pl_nr > 0) /* still has more pages */
758 stripe_to = PAGE_SIZE;
760 sub = lov_sub_get(env, lio, stripe);
762 rc = cl_io_commit_async(sub->sub_env, sub->sub_io,
763 plist, from, stripe_to, cb);
769 if (plist->pl_nr > 0) /* short write */
775 /* for error case, add the page back into the qin list */
776 LASSERT(ergo(rc == 0, plist->pl_nr == 0));
777 while (plist->pl_nr > 0) {
778 /* error occurred, add the uncommitted pages back into queue */
779 page = cl_page_list_last(plist);
780 cl_page_list_move_head(queue, plist, page);
786 static int lov_io_fault_start(const struct lu_env *env,
787 const struct cl_io_slice *ios)
789 struct cl_fault_io *fio;
791 struct lov_io_sub *sub;
794 fio = &ios->cis_io->u.ci_fault;
795 lio = cl2lov_io(env, ios);
796 sub = lov_sub_get(env, lio, lov_page_stripe(fio->ft_page));
797 sub->sub_io->u.ci_fault.ft_nob = fio->ft_nob;
798 RETURN(lov_io_start(env, ios));
801 static void lov_io_fsync_end(const struct lu_env *env,
802 const struct cl_io_slice *ios)
804 struct lov_io *lio = cl2lov_io(env, ios);
805 struct lov_io_sub *sub;
806 unsigned int *written = &ios->cis_io->u.ci_fsync.fi_nr_written;
810 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
811 struct cl_io *subio = sub->sub_io;
813 lov_io_end_wrapper(sub->sub_env, subio);
815 if (subio->ci_result == 0)
816 *written += subio->u.ci_fsync.fi_nr_written;
821 static const struct cl_io_operations lov_io_ops = {
824 .cio_fini = lov_io_fini,
825 .cio_iter_init = lov_io_rw_iter_init,
826 .cio_iter_fini = lov_io_iter_fini,
827 .cio_lock = lov_io_lock,
828 .cio_unlock = lov_io_unlock,
829 .cio_start = lov_io_start,
830 .cio_end = lov_io_end
833 .cio_fini = lov_io_fini,
834 .cio_iter_init = lov_io_rw_iter_init,
835 .cio_iter_fini = lov_io_iter_fini,
836 .cio_lock = lov_io_lock,
837 .cio_unlock = lov_io_unlock,
838 .cio_start = lov_io_start,
839 .cio_end = lov_io_end
842 .cio_fini = lov_io_fini,
843 .cio_iter_init = lov_io_iter_init,
844 .cio_iter_fini = lov_io_iter_fini,
845 .cio_lock = lov_io_lock,
846 .cio_unlock = lov_io_unlock,
847 .cio_start = lov_io_start,
848 .cio_end = lov_io_end
850 [CIT_DATA_VERSION] = {
851 .cio_fini = lov_io_fini,
852 .cio_iter_init = lov_io_iter_init,
853 .cio_iter_fini = lov_io_iter_fini,
854 .cio_lock = lov_io_lock,
855 .cio_unlock = lov_io_unlock,
856 .cio_start = lov_io_start,
857 .cio_end = lov_io_data_version_end,
860 .cio_fini = lov_io_fini,
861 .cio_iter_init = lov_io_iter_init,
862 .cio_iter_fini = lov_io_iter_fini,
863 .cio_lock = lov_io_lock,
864 .cio_unlock = lov_io_unlock,
865 .cio_start = lov_io_fault_start,
866 .cio_end = lov_io_end
869 .cio_fini = lov_io_fini,
870 .cio_iter_init = lov_io_iter_init,
871 .cio_iter_fini = lov_io_iter_fini,
872 .cio_lock = lov_io_lock,
873 .cio_unlock = lov_io_unlock,
874 .cio_start = lov_io_start,
875 .cio_end = lov_io_fsync_end
878 .cio_fini = lov_io_fini,
879 .cio_iter_init = lov_io_iter_init,
880 .cio_iter_fini = lov_io_iter_fini,
881 .cio_lock = lov_io_lock,
882 .cio_unlock = lov_io_unlock,
883 .cio_start = lov_io_start,
884 .cio_end = lov_io_end
887 .cio_fini = lov_io_fini
890 .cio_read_ahead = lov_io_read_ahead,
891 .cio_submit = lov_io_submit,
892 .cio_commit_async = lov_io_commit_async,
895 /*****************************************************************************
897 * Empty lov io operations.
901 static void lov_empty_io_fini(const struct lu_env *env,
902 const struct cl_io_slice *ios)
904 struct lov_object *lov = cl2lov(ios->cis_obj);
907 if (atomic_dec_and_test(&lov->lo_active_ios))
908 wake_up_all(&lov->lo_waitq);
912 static int lov_empty_io_submit(const struct lu_env *env,
913 const struct cl_io_slice *ios,
914 enum cl_req_type crt, struct cl_2queue *queue)
919 static void lov_empty_impossible(const struct lu_env *env,
920 struct cl_io_slice *ios)
925 #define LOV_EMPTY_IMPOSSIBLE ((void *)lov_empty_impossible)
928 * An io operation vector for files without stripes.
930 static const struct cl_io_operations lov_empty_io_ops = {
933 .cio_fini = lov_empty_io_fini,
935 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
936 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
937 .cio_start = LOV_EMPTY_IMPOSSIBLE,
938 .cio_end = LOV_EMPTY_IMPOSSIBLE
942 .cio_fini = lov_empty_io_fini,
943 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
944 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
945 .cio_start = LOV_EMPTY_IMPOSSIBLE,
946 .cio_end = LOV_EMPTY_IMPOSSIBLE
949 .cio_fini = lov_empty_io_fini,
950 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
951 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
952 .cio_start = LOV_EMPTY_IMPOSSIBLE,
953 .cio_end = LOV_EMPTY_IMPOSSIBLE
956 .cio_fini = lov_empty_io_fini,
957 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
958 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
959 .cio_start = LOV_EMPTY_IMPOSSIBLE,
960 .cio_end = LOV_EMPTY_IMPOSSIBLE
963 .cio_fini = lov_empty_io_fini
966 .cio_fini = lov_empty_io_fini
969 .cio_fini = lov_empty_io_fini
972 .cio_submit = lov_empty_io_submit,
973 .cio_commit_async = LOV_EMPTY_IMPOSSIBLE
976 int lov_io_init_raid0(const struct lu_env *env, struct cl_object *obj,
979 struct lov_io *lio = lov_env_io(env);
980 struct lov_object *lov = cl2lov(obj);
983 INIT_LIST_HEAD(&lio->lis_active);
984 io->ci_result = lov_io_slice_init(lio, lov, io);
985 if (io->ci_result != 0)
986 RETURN(io->ci_result);
988 if (io->ci_result == 0) {
989 io->ci_result = lov_io_subio_init(env, lio, io);
990 if (io->ci_result == 0) {
991 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_io_ops);
992 atomic_inc(&lov->lo_active_ios);
995 RETURN(io->ci_result);
998 int lov_io_init_empty(const struct lu_env *env, struct cl_object *obj,
1001 struct lov_object *lov = cl2lov(obj);
1002 struct lov_io *lio = lov_env_io(env);
1006 lio->lis_object = lov;
1007 switch (io->ci_type) {
1017 case CIT_DATA_VERSION:
1025 CERROR("Page fault on a file without stripes: "DFID"\n",
1026 PFID(lu_object_fid(&obj->co_lu)));
1030 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
1031 atomic_inc(&lov->lo_active_ios);
1034 io->ci_result = result < 0 ? result : 0;
1038 int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
1041 struct lov_object *lov = cl2lov(obj);
1042 struct lov_io *lio = lov_env_io(env);
1046 LASSERT(lov->lo_lsm != NULL);
1047 lio->lis_object = lov;
1049 switch (io->ci_type) {
1051 LASSERTF(0, "invalid type %d\n", io->ci_type);
1052 result = -EOPNOTSUPP;
1057 case CIT_DATA_VERSION:
1061 /* the truncate to 0 is managed by MDT:
1062 * - in open, for open O_TRUNC
1063 * - in setattr, for truncate
1065 /* the truncate is for size > 0 so triggers a restore */
1066 if (cl_io_is_trunc(io)) {
1067 io->ci_restore_needed = 1;
1075 io->ci_restore_needed = 1;
1081 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
1082 atomic_inc(&lov->lo_active_ios);
1085 io->ci_result = result < 0 ? result : 0;