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 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 inline void lov_sub_enter(struct lov_io_sub *sub)
54 static inline void lov_sub_exit(struct lov_io_sub *sub)
59 static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
60 struct lov_io_sub *sub)
63 if (sub->sub_io != NULL) {
64 if (sub->sub_io_initialized) {
66 cl_io_fini(sub->sub_env, sub->sub_io);
68 sub->sub_io_initialized = 0;
69 lio->lis_active_subios--;
71 if (sub->sub_stripe == lio->lis_single_subio_index)
72 lio->lis_single_subio_index = -1;
73 else if (!sub->sub_borrowed)
74 OBD_FREE_PTR(sub->sub_io);
77 if (sub->sub_env != NULL && !IS_ERR(sub->sub_env)) {
78 if (!sub->sub_borrowed)
79 cl_env_put(sub->sub_env, &sub->sub_refcheck);
85 static void lov_io_sub_inherit(struct cl_io *io, struct lov_io *lio,
86 int stripe, loff_t start, loff_t end)
88 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
89 struct cl_io *parent = lio->lis_cl.cis_io;
91 switch (io->ci_type) {
93 io->u.ci_setattr.sa_attr = parent->u.ci_setattr.sa_attr;
94 io->u.ci_setattr.sa_valid = parent->u.ci_setattr.sa_valid;
95 io->u.ci_setattr.sa_stripe_index = stripe;
96 io->u.ci_setattr.sa_parent_fid =
97 parent->u.ci_setattr.sa_parent_fid;
98 io->u.ci_setattr.sa_capa = parent->u.ci_setattr.sa_capa;
99 if (cl_io_is_trunc(io)) {
100 loff_t new_size = parent->u.ci_setattr.sa_attr.lvb_size;
102 new_size = lov_size_to_stripe(lsm, new_size, stripe);
103 io->u.ci_setattr.sa_attr.lvb_size = new_size;
108 struct cl_object *obj = parent->ci_obj;
109 loff_t off = cl_offset(obj, parent->u.ci_fault.ft_index);
111 io->u.ci_fault = parent->u.ci_fault;
112 off = lov_size_to_stripe(lsm, off, stripe);
113 io->u.ci_fault.ft_index = cl_index(obj, off);
117 io->u.ci_fsync.fi_start = start;
118 io->u.ci_fsync.fi_end = end;
119 io->u.ci_fsync.fi_capa = parent->u.ci_fsync.fi_capa;
120 io->u.ci_fsync.fi_fid = parent->u.ci_fsync.fi_fid;
121 io->u.ci_fsync.fi_mode = parent->u.ci_fsync.fi_mode;
126 io->u.ci_wr.wr_sync = cl_io_is_sync_write(parent);
127 if (cl_io_is_append(parent)) {
128 io->u.ci_wr.wr_append = 1;
130 io->u.ci_rw.crw_pos = start;
131 io->u.ci_rw.crw_count = end - start;
140 static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
141 struct lov_io_sub *sub)
143 struct lov_object *lov = lio->lis_object;
144 struct lov_device *ld = lu2lov_dev(lov2cl(lov)->co_lu.lo_dev);
145 struct cl_io *sub_io;
146 struct cl_object *sub_obj;
147 struct cl_io *io = lio->lis_cl.cis_io;
149 int stripe = sub->sub_stripe;
152 LASSERT(sub->sub_io == NULL);
153 LASSERT(sub->sub_env == NULL);
154 LASSERT(sub->sub_stripe < lio->lis_stripe_count);
157 if (unlikely(lov_r0(lov)->lo_sub[stripe] == NULL))
161 sub->sub_io_initialized = 0;
162 sub->sub_borrowed = 0;
164 if (lio->lis_mem_frozen) {
165 LASSERT(mutex_is_locked(&ld->ld_mutex));
166 sub->sub_io = &ld->ld_emrg[stripe]->emrg_subio;
167 sub->sub_env = ld->ld_emrg[stripe]->emrg_env;
168 sub->sub_borrowed = 1;
172 /* obtain new environment */
173 cookie = cl_env_reenter();
174 sub->sub_env = cl_env_get(&sub->sub_refcheck);
175 cl_env_reexit(cookie);
176 if (IS_ERR(sub->sub_env))
177 result = PTR_ERR(sub->sub_env);
181 * First sub-io. Use ->lis_single_subio to
182 * avoid dynamic allocation.
184 if (lio->lis_active_subios == 0) {
185 sub->sub_io = &lio->lis_single_subio;
186 lio->lis_single_subio_index = stripe;
188 OBD_ALLOC_PTR(sub->sub_io);
189 if (sub->sub_io == NULL)
196 sub_obj = lovsub2cl(lov_r0(lov)->lo_sub[stripe]);
197 sub_io = sub->sub_io;
199 sub_io->ci_obj = sub_obj;
200 sub_io->ci_result = 0;
202 sub_io->ci_parent = io;
203 sub_io->ci_lockreq = io->ci_lockreq;
204 sub_io->ci_type = io->ci_type;
205 sub_io->ci_no_srvlock = io->ci_no_srvlock;
206 sub_io->ci_noatime = io->ci_noatime;
209 result = cl_io_sub_init(sub->sub_env, sub_io,
210 io->ci_type, sub_obj);
213 lio->lis_active_subios++;
214 sub->sub_io_initialized = 1;
219 lov_io_sub_fini(env, lio, sub);
223 struct lov_io_sub *lov_sub_get(const struct lu_env *env,
224 struct lov_io *lio, int stripe)
227 struct lov_io_sub *sub = &lio->lis_subs[stripe];
229 LASSERT(stripe < lio->lis_stripe_count);
232 if (!sub->sub_io_initialized) {
233 sub->sub_stripe = stripe;
234 rc = lov_io_sub_init(env, lio, sub);
244 void lov_sub_put(struct lov_io_sub *sub)
249 /*****************************************************************************
255 int lov_page_stripe(const struct cl_page *page)
257 const struct cl_page_slice *slice;
260 slice = cl_page_at(page, &lov_device_type);
261 LASSERT(slice != NULL);
262 LASSERT(slice->cpl_obj != NULL);
264 RETURN(cl2lov_page(slice)->lps_stripe);
267 struct lov_io_sub *lov_page_subio(const struct lu_env *env, struct lov_io *lio,
268 const struct cl_page_slice *slice)
270 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
271 struct cl_page *page = slice->cpl_page;
274 LASSERT(lio->lis_cl.cis_io != NULL);
275 LASSERT(cl2lov(slice->cpl_obj) == lio->lis_object);
276 LASSERT(lsm != NULL);
277 LASSERT(lio->lis_nr_subios > 0);
280 stripe = lov_page_stripe(page);
281 RETURN(lov_sub_get(env, lio, stripe));
285 static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
288 struct lov_stripe_md *lsm;
292 LASSERT(lio->lis_object != NULL);
293 lsm = lio->lis_object->lo_lsm;
296 * Need to be optimized, we can't afford to allocate a piece of memory
297 * when writing a page. -jay
299 OBD_ALLOC_LARGE(lio->lis_subs,
300 lsm->lsm_stripe_count * sizeof lio->lis_subs[0]);
301 if (lio->lis_subs != NULL) {
302 lio->lis_nr_subios = lio->lis_stripe_count;
303 lio->lis_single_subio_index = -1;
304 lio->lis_active_subios = 0;
311 static int lov_io_slice_init(struct lov_io *lio,
312 struct lov_object *obj, struct cl_io *io)
317 lio->lis_object = obj;
319 LASSERT(obj->lo_lsm != NULL);
320 lio->lis_stripe_count = obj->lo_lsm->lsm_stripe_count;
322 switch (io->ci_type) {
325 lio->lis_pos = io->u.ci_rw.crw_pos;
326 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
327 lio->lis_io_endpos = lio->lis_endpos;
328 if (cl_io_is_append(io)) {
329 LASSERT(io->ci_type == CIT_WRITE);
331 /* If there is LOV EA hole, then we may cannot locate
332 * the current file-tail exactly. */
333 if (unlikely(obj->lo_lsm->lsm_pattern &
338 lio->lis_endpos = OBD_OBJECT_EOF;
343 if (cl_io_is_trunc(io))
344 lio->lis_pos = io->u.ci_setattr.sa_attr.lvb_size;
347 lio->lis_endpos = OBD_OBJECT_EOF;
351 pgoff_t index = io->u.ci_fault.ft_index;
352 lio->lis_pos = cl_offset(io->ci_obj, index);
353 lio->lis_endpos = cl_offset(io->ci_obj, index + 1);
358 lio->lis_pos = io->u.ci_fsync.fi_start;
359 lio->lis_endpos = io->u.ci_fsync.fi_end;
365 lio->lis_endpos = OBD_OBJECT_EOF;
375 static void lov_io_fini(const struct lu_env *env, const struct cl_io_slice *ios)
377 struct lov_io *lio = cl2lov_io(env, ios);
378 struct lov_object *lov = cl2lov(ios->cis_obj);
382 if (lio->lis_subs != NULL) {
383 for (i = 0; i < lio->lis_nr_subios; i++)
384 lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
385 OBD_FREE_LARGE(lio->lis_subs,
386 lio->lis_nr_subios * sizeof lio->lis_subs[0]);
387 lio->lis_nr_subios = 0;
390 LASSERT(atomic_read(&lov->lo_active_ios) > 0);
391 if (atomic_dec_and_test(&lov->lo_active_ios))
392 wake_up_all(&lov->lo_waitq);
396 static obd_off lov_offset_mod(obd_off val, int delta)
398 if (val != OBD_OBJECT_EOF)
403 static int lov_io_iter_init(const struct lu_env *env,
404 const struct cl_io_slice *ios)
406 struct lov_io *lio = cl2lov_io(env, ios);
407 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
408 struct lov_io_sub *sub;
416 endpos = lov_offset_mod(lio->lis_endpos, -1);
417 for (stripe = 0; stripe < lio->lis_stripe_count; stripe++) {
418 if (!lov_stripe_intersects(lsm, stripe, lio->lis_pos,
419 endpos, &start, &end))
422 if (unlikely(lov_r0(lio->lis_object)->lo_sub[stripe] == NULL)) {
423 if (ios->cis_io->ci_type == CIT_READ ||
424 ios->cis_io->ci_type == CIT_WRITE ||
425 ios->cis_io->ci_type == CIT_FAULT)
431 end = lov_offset_mod(end, +1);
432 sub = lov_sub_get(env, lio, stripe);
434 lov_io_sub_inherit(sub->sub_io, lio, stripe,
436 rc = cl_io_iter_init(sub->sub_env, sub->sub_io);
438 CDEBUG(D_VFSTRACE, "shrink: %d ["LPU64", "LPU64")\n",
444 list_add_tail(&sub->sub_linkage, &lio->lis_active);
451 static int lov_io_rw_iter_init(const struct lu_env *env,
452 const struct cl_io_slice *ios)
454 struct lov_io *lio = cl2lov_io(env, ios);
455 struct cl_io *io = ios->cis_io;
456 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
457 loff_t start = io->u.ci_rw.crw_pos;
459 unsigned long ssize = lsm->lsm_stripe_size;
461 LASSERT(io->ci_type == CIT_READ || io->ci_type == CIT_WRITE);
464 /* fast path for common case. */
465 if (lio->lis_nr_subios != 1 && !cl_io_is_append(io)) {
467 lov_do_div64(start, ssize);
468 next = (start + 1) * ssize;
469 if (next <= start * ssize)
472 io->ci_continue = next < lio->lis_io_endpos;
473 io->u.ci_rw.crw_count = min_t(loff_t, lio->lis_io_endpos,
474 next) - io->u.ci_rw.crw_pos;
475 lio->lis_pos = io->u.ci_rw.crw_pos;
476 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
477 CDEBUG(D_VFSTRACE, "stripe: "LPU64" chunk: ["LPU64", "LPU64") "
478 LPU64"\n", (__u64)start, lio->lis_pos, lio->lis_endpos,
479 (__u64)lio->lis_io_endpos);
482 * XXX The following call should be optimized: we know, that
483 * [lio->lis_pos, lio->lis_endpos) intersects with exactly one stripe.
485 RETURN(lov_io_iter_init(env, ios));
488 static int lov_io_call(const struct lu_env *env, struct lov_io *lio,
489 int (*iofunc)(const struct lu_env *, struct cl_io *))
491 struct cl_io *parent = lio->lis_cl.cis_io;
492 struct lov_io_sub *sub;
496 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
498 rc = iofunc(sub->sub_env, sub->sub_io);
503 if (parent->ci_result == 0)
504 parent->ci_result = sub->sub_io->ci_result;
509 static int lov_io_lock(const struct lu_env *env, const struct cl_io_slice *ios)
512 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_lock));
515 static int lov_io_start(const struct lu_env *env, const struct cl_io_slice *ios)
518 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_start));
521 static int lov_io_end_wrapper(const struct lu_env *env, struct cl_io *io)
525 * It's possible that lov_io_start() wasn't called against this
526 * sub-io, either because previous sub-io failed, or upper layer
529 if (io->ci_state == CIS_IO_GOING)
532 io->ci_state = CIS_IO_FINISHED;
536 static int lov_io_iter_fini_wrapper(const struct lu_env *env, struct cl_io *io)
538 cl_io_iter_fini(env, io);
542 static int lov_io_unlock_wrapper(const struct lu_env *env, struct cl_io *io)
544 cl_io_unlock(env, io);
548 static void lov_io_end(const struct lu_env *env, const struct cl_io_slice *ios)
552 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_end_wrapper);
556 static void lov_io_iter_fini(const struct lu_env *env,
557 const struct cl_io_slice *ios)
559 struct lov_io *lio = cl2lov_io(env, ios);
563 rc = lov_io_call(env, lio, lov_io_iter_fini_wrapper);
565 while (!list_empty(&lio->lis_active))
566 list_del_init(lio->lis_active.next);
570 static void lov_io_unlock(const struct lu_env *env,
571 const struct cl_io_slice *ios)
576 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_unlock_wrapper);
582 * lov implementation of cl_operations::cio_submit() method. It takes a list
583 * of pages in \a queue, splits it into per-stripe sub-lists, invokes
584 * cl_io_submit() on underlying devices to submit sub-lists, and then splices
587 * Major complication of this function is a need to handle memory cleansing:
588 * cl_io_submit() is called to write out pages as a part of VM memory
589 * reclamation, and hence it may not fail due to memory shortages (system
590 * dead-locks otherwise). To deal with this, some resources (sub-lists,
591 * sub-environment, etc.) are allocated per-device on "startup" (i.e., in a
592 * not-memory cleansing context), and in case of memory shortage, these
593 * pre-allocated resources are used by lov_io_submit() under
594 * lov_device::ld_mutex mutex.
596 static int lov_io_submit(const struct lu_env *env,
597 const struct cl_io_slice *ios,
598 enum cl_req_type crt, struct cl_2queue *queue)
600 struct cl_page_list *qin = &queue->c2_qin;
601 struct lov_io *lio = cl2lov_io(env, ios);
602 struct lov_io_sub *sub;
603 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
604 struct cl_page *page;
609 if (lio->lis_active_subios == 1) {
610 int idx = lio->lis_single_subio_index;
612 LASSERT(idx < lio->lis_nr_subios);
613 sub = lov_sub_get(env, lio, idx);
614 LASSERT(!IS_ERR(sub));
615 LASSERT(sub->sub_io == &lio->lis_single_subio);
616 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
622 LASSERT(lio->lis_subs != NULL);
624 cl_page_list_init(plist);
625 while (qin->pl_nr > 0) {
626 struct cl_2queue *cl2q = &lov_env_info(env)->lti_cl2q;
628 cl_2queue_init(cl2q);
630 page = cl_page_list_first(qin);
631 cl_page_list_move(&cl2q->c2_qin, qin, page);
633 stripe = lov_page_stripe(page);
634 while (qin->pl_nr > 0) {
635 page = cl_page_list_first(qin);
636 if (stripe != lov_page_stripe(page))
639 cl_page_list_move(&cl2q->c2_qin, qin, page);
642 sub = lov_sub_get(env, lio, stripe);
644 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
651 cl_page_list_splice(&cl2q->c2_qin, plist);
652 cl_page_list_splice(&cl2q->c2_qout, &queue->c2_qout);
653 cl_2queue_fini(env, cl2q);
659 cl_page_list_splice(plist, qin);
660 cl_page_list_fini(env, plist);
665 static int lov_io_commit_async(const struct lu_env *env,
666 const struct cl_io_slice *ios,
667 struct cl_page_list *queue, int from, int to,
670 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
671 struct lov_io *lio = cl2lov_io(env, ios);
672 struct lov_io_sub *sub;
673 struct cl_page *page;
677 if (lio->lis_active_subios == 1) {
678 int idx = lio->lis_single_subio_index;
680 LASSERT(idx < lio->lis_nr_subios);
681 sub = lov_sub_get(env, lio, idx);
682 LASSERT(!IS_ERR(sub));
683 LASSERT(sub->sub_io == &lio->lis_single_subio);
684 rc = cl_io_commit_async(sub->sub_env, sub->sub_io, queue,
690 LASSERT(lio->lis_subs != NULL);
692 cl_page_list_init(plist);
693 while (queue->pl_nr > 0) {
697 LASSERT(plist->pl_nr == 0);
698 page = cl_page_list_first(queue);
699 cl_page_list_move(plist, queue, page);
701 stripe = lov_page_stripe(page);
702 while (queue->pl_nr > 0) {
703 page = cl_page_list_first(queue);
704 if (stripe != lov_page_stripe(page))
707 cl_page_list_move(plist, queue, page);
710 if (queue->pl_nr > 0) /* still has more pages */
711 stripe_to = PAGE_SIZE;
713 sub = lov_sub_get(env, lio, stripe);
715 rc = cl_io_commit_async(sub->sub_env, sub->sub_io,
716 plist, from, stripe_to, cb);
723 if (plist->pl_nr > 0) /* short write */
729 /* for error case, add the page back into the qin list */
730 LASSERT(ergo(rc == 0, plist->pl_nr == 0));
731 while (plist->pl_nr > 0) {
732 /* error occurred, add the uncommitted pages back into queue */
733 page = cl_page_list_last(plist);
734 cl_page_list_move_head(queue, plist, page);
740 static int lov_io_fault_start(const struct lu_env *env,
741 const struct cl_io_slice *ios)
743 struct cl_fault_io *fio;
745 struct lov_io_sub *sub;
748 fio = &ios->cis_io->u.ci_fault;
749 lio = cl2lov_io(env, ios);
750 sub = lov_sub_get(env, lio, lov_page_stripe(fio->ft_page));
751 sub->sub_io->u.ci_fault.ft_nob = fio->ft_nob;
753 RETURN(lov_io_start(env, ios));
756 static void lov_io_fsync_end(const struct lu_env *env,
757 const struct cl_io_slice *ios)
759 struct lov_io *lio = cl2lov_io(env, ios);
760 struct lov_io_sub *sub;
761 unsigned int *written = &ios->cis_io->u.ci_fsync.fi_nr_written;
765 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
766 struct cl_io *subio = sub->sub_io;
769 lov_io_end_wrapper(sub->sub_env, subio);
772 if (subio->ci_result == 0)
773 *written += subio->u.ci_fsync.fi_nr_written;
778 static const struct cl_io_operations lov_io_ops = {
781 .cio_fini = lov_io_fini,
782 .cio_iter_init = lov_io_rw_iter_init,
783 .cio_iter_fini = lov_io_iter_fini,
784 .cio_lock = lov_io_lock,
785 .cio_unlock = lov_io_unlock,
786 .cio_start = lov_io_start,
787 .cio_end = lov_io_end
790 .cio_fini = lov_io_fini,
791 .cio_iter_init = lov_io_rw_iter_init,
792 .cio_iter_fini = lov_io_iter_fini,
793 .cio_lock = lov_io_lock,
794 .cio_unlock = lov_io_unlock,
795 .cio_start = lov_io_start,
796 .cio_end = lov_io_end
799 .cio_fini = lov_io_fini,
800 .cio_iter_init = lov_io_iter_init,
801 .cio_iter_fini = lov_io_iter_fini,
802 .cio_lock = lov_io_lock,
803 .cio_unlock = lov_io_unlock,
804 .cio_start = lov_io_start,
805 .cio_end = lov_io_end
808 .cio_fini = lov_io_fini,
809 .cio_iter_init = lov_io_iter_init,
810 .cio_iter_fini = lov_io_iter_fini,
811 .cio_lock = lov_io_lock,
812 .cio_unlock = lov_io_unlock,
813 .cio_start = lov_io_fault_start,
814 .cio_end = lov_io_end
817 .cio_fini = lov_io_fini,
818 .cio_iter_init = lov_io_iter_init,
819 .cio_iter_fini = lov_io_iter_fini,
820 .cio_lock = lov_io_lock,
821 .cio_unlock = lov_io_unlock,
822 .cio_start = lov_io_start,
823 .cio_end = lov_io_fsync_end
826 .cio_fini = lov_io_fini
829 .cio_submit = lov_io_submit,
830 .cio_commit_async = lov_io_commit_async,
833 /*****************************************************************************
835 * Empty lov io operations.
839 static void lov_empty_io_fini(const struct lu_env *env,
840 const struct cl_io_slice *ios)
842 struct lov_object *lov = cl2lov(ios->cis_obj);
845 if (atomic_dec_and_test(&lov->lo_active_ios))
846 wake_up_all(&lov->lo_waitq);
850 static void lov_empty_impossible(const struct lu_env *env,
851 struct cl_io_slice *ios)
856 #define LOV_EMPTY_IMPOSSIBLE ((void *)lov_empty_impossible)
859 * An io operation vector for files without stripes.
861 static const struct cl_io_operations lov_empty_io_ops = {
864 .cio_fini = lov_empty_io_fini,
866 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
867 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
868 .cio_start = LOV_EMPTY_IMPOSSIBLE,
869 .cio_end = LOV_EMPTY_IMPOSSIBLE
873 .cio_fini = lov_empty_io_fini,
874 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
875 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
876 .cio_start = LOV_EMPTY_IMPOSSIBLE,
877 .cio_end = LOV_EMPTY_IMPOSSIBLE
880 .cio_fini = lov_empty_io_fini,
881 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
882 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
883 .cio_start = LOV_EMPTY_IMPOSSIBLE,
884 .cio_end = LOV_EMPTY_IMPOSSIBLE
887 .cio_fini = lov_empty_io_fini,
888 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
889 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
890 .cio_start = LOV_EMPTY_IMPOSSIBLE,
891 .cio_end = LOV_EMPTY_IMPOSSIBLE
894 .cio_fini = lov_empty_io_fini
897 .cio_fini = lov_empty_io_fini
900 .cio_submit = LOV_EMPTY_IMPOSSIBLE,
901 .cio_commit_async = LOV_EMPTY_IMPOSSIBLE
904 int lov_io_init_raid0(const struct lu_env *env, struct cl_object *obj,
907 struct lov_io *lio = lov_env_io(env);
908 struct lov_object *lov = cl2lov(obj);
911 INIT_LIST_HEAD(&lio->lis_active);
912 io->ci_result = lov_io_slice_init(lio, lov, io);
913 if (io->ci_result != 0)
914 RETURN(io->ci_result);
916 if (io->ci_result == 0) {
917 io->ci_result = lov_io_subio_init(env, lio, io);
918 if (io->ci_result == 0) {
919 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_io_ops);
920 atomic_inc(&lov->lo_active_ios);
923 RETURN(io->ci_result);
926 int lov_io_init_empty(const struct lu_env *env, struct cl_object *obj,
929 struct lov_object *lov = cl2lov(obj);
930 struct lov_io *lio = lov_env_io(env);
934 lio->lis_object = lov;
935 switch (io->ci_type) {
951 CERROR("Page fault on a file without stripes: "DFID"\n",
952 PFID(lu_object_fid(&obj->co_lu)));
956 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
957 atomic_inc(&lov->lo_active_ios);
960 io->ci_result = result < 0 ? result : 0;
964 int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
967 struct lov_object *lov = cl2lov(obj);
968 struct lov_io *lio = lov_env_io(env);
972 LASSERT(lov->lo_lsm != NULL);
973 lio->lis_object = lov;
975 switch (io->ci_type) {
977 LASSERTF(0, "invalid type %d\n", io->ci_type);
983 /* the truncate to 0 is managed by MDT:
984 * - in open, for open O_TRUNC
985 * - in setattr, for truncate
987 /* the truncate is for size > 0 so triggers a restore */
988 if (cl_io_is_trunc(io))
989 io->ci_restore_needed = 1;
995 io->ci_restore_needed = 1;
1000 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
1001 atomic_inc(&lov->lo_active_ios);
1004 io->ci_result = result < 0 ? result : 0;
1005 RETURN(result != 0);