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 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_attr_flags =
95 parent->u.ci_setattr.sa_attr_flags;
96 io->u.ci_setattr.sa_valid = parent->u.ci_setattr.sa_valid;
97 io->u.ci_setattr.sa_stripe_index = stripe;
98 io->u.ci_setattr.sa_parent_fid =
99 parent->u.ci_setattr.sa_parent_fid;
100 if (cl_io_is_trunc(io)) {
101 loff_t new_size = parent->u.ci_setattr.sa_attr.lvb_size;
103 new_size = lov_size_to_stripe(lsm, new_size, stripe);
104 io->u.ci_setattr.sa_attr.lvb_size = new_size;
108 case CIT_DATA_VERSION: {
109 io->u.ci_data_version.dv_data_version = 0;
110 io->u.ci_data_version.dv_flags =
111 parent->u.ci_data_version.dv_flags;
115 struct cl_object *obj = parent->ci_obj;
116 loff_t off = cl_offset(obj, parent->u.ci_fault.ft_index);
118 io->u.ci_fault = parent->u.ci_fault;
119 off = lov_size_to_stripe(lsm, off, stripe);
120 io->u.ci_fault.ft_index = cl_index(obj, off);
124 io->u.ci_fsync.fi_start = start;
125 io->u.ci_fsync.fi_end = end;
126 io->u.ci_fsync.fi_fid = parent->u.ci_fsync.fi_fid;
127 io->u.ci_fsync.fi_mode = parent->u.ci_fsync.fi_mode;
132 io->u.ci_wr.wr_sync = cl_io_is_sync_write(parent);
133 if (cl_io_is_append(parent)) {
134 io->u.ci_wr.wr_append = 1;
136 io->u.ci_rw.crw_pos = start;
137 io->u.ci_rw.crw_count = end - start;
142 io->u.ci_ladvise.li_start = start;
143 io->u.ci_ladvise.li_end = end;
144 io->u.ci_ladvise.li_fid = parent->u.ci_ladvise.li_fid;
145 io->u.ci_ladvise.li_advice = parent->u.ci_ladvise.li_advice;
146 io->u.ci_ladvise.li_flags = parent->u.ci_ladvise.li_flags;
154 static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
155 struct lov_io_sub *sub)
157 struct lov_object *lov = lio->lis_object;
158 struct lov_device *ld = lu2lov_dev(lov2cl(lov)->co_lu.lo_dev);
159 struct cl_io *sub_io;
160 struct cl_object *sub_obj;
161 struct cl_io *io = lio->lis_cl.cis_io;
163 int stripe = sub->sub_stripe;
166 LASSERT(sub->sub_io == NULL);
167 LASSERT(sub->sub_env == NULL);
168 LASSERT(sub->sub_stripe < lio->lis_stripe_count);
171 if (unlikely(lov_r0(lov)->lo_sub[stripe] == NULL))
175 sub->sub_io_initialized = 0;
176 sub->sub_borrowed = 0;
178 if (lio->lis_mem_frozen) {
179 LASSERT(mutex_is_locked(&ld->ld_mutex));
180 sub->sub_io = &ld->ld_emrg[stripe]->emrg_subio;
181 sub->sub_env = ld->ld_emrg[stripe]->emrg_env;
182 sub->sub_borrowed = 1;
184 sub->sub_env = cl_env_get(&sub->sub_refcheck);
185 if (IS_ERR(sub->sub_env))
186 result = PTR_ERR(sub->sub_env);
190 * First sub-io. Use ->lis_single_subio to
191 * avoid dynamic allocation.
193 if (lio->lis_active_subios == 0) {
194 sub->sub_io = &lio->lis_single_subio;
195 lio->lis_single_subio_index = stripe;
197 OBD_ALLOC_PTR(sub->sub_io);
198 if (sub->sub_io == NULL)
205 sub_obj = lovsub2cl(lov_r0(lov)->lo_sub[stripe]);
206 sub_io = sub->sub_io;
208 sub_io->ci_obj = sub_obj;
209 sub_io->ci_result = 0;
211 sub_io->ci_parent = io;
212 sub_io->ci_lockreq = io->ci_lockreq;
213 sub_io->ci_type = io->ci_type;
214 sub_io->ci_no_srvlock = io->ci_no_srvlock;
215 sub_io->ci_noatime = io->ci_noatime;
218 result = cl_io_sub_init(sub->sub_env, sub_io,
219 io->ci_type, sub_obj);
222 lio->lis_active_subios++;
223 sub->sub_io_initialized = 1;
228 lov_io_sub_fini(env, lio, sub);
232 struct lov_io_sub *lov_sub_get(const struct lu_env *env,
233 struct lov_io *lio, int stripe)
236 struct lov_io_sub *sub = &lio->lis_subs[stripe];
238 LASSERT(stripe < lio->lis_stripe_count);
241 if (!sub->sub_io_initialized) {
242 sub->sub_stripe = stripe;
243 rc = lov_io_sub_init(env, lio, sub);
253 void lov_sub_put(struct lov_io_sub *sub)
258 /*****************************************************************************
264 int lov_page_stripe(const struct cl_page *page)
266 const struct cl_page_slice *slice;
269 slice = cl_page_at(page, &lov_device_type);
270 LASSERT(slice != NULL);
271 LASSERT(slice->cpl_obj != NULL);
273 RETURN(cl2lov_page(slice)->lps_stripe);
276 struct lov_io_sub *lov_page_subio(const struct lu_env *env, struct lov_io *lio,
277 const struct cl_page_slice *slice)
279 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
280 struct cl_page *page = slice->cpl_page;
283 LASSERT(lio->lis_cl.cis_io != NULL);
284 LASSERT(cl2lov(slice->cpl_obj) == lio->lis_object);
285 LASSERT(lsm != NULL);
286 LASSERT(lio->lis_nr_subios > 0);
289 stripe = lov_page_stripe(page);
290 RETURN(lov_sub_get(env, lio, stripe));
294 static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
297 struct lov_stripe_md *lsm;
301 LASSERT(lio->lis_object != NULL);
302 lsm = lio->lis_object->lo_lsm;
305 * Need to be optimized, we can't afford to allocate a piece of memory
306 * when writing a page. -jay
308 OBD_ALLOC_LARGE(lio->lis_subs,
309 lsm->lsm_stripe_count * sizeof lio->lis_subs[0]);
310 if (lio->lis_subs != NULL) {
311 lio->lis_nr_subios = lio->lis_stripe_count;
312 lio->lis_single_subio_index = -1;
313 lio->lis_active_subios = 0;
321 static int lov_io_slice_init(struct lov_io *lio,
322 struct lov_object *obj, struct cl_io *io)
327 lio->lis_object = obj;
329 LASSERT(obj->lo_lsm != NULL);
330 lio->lis_stripe_count = obj->lo_lsm->lsm_stripe_count;
332 switch (io->ci_type) {
335 lio->lis_pos = io->u.ci_rw.crw_pos;
336 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
337 lio->lis_io_endpos = lio->lis_endpos;
338 if (cl_io_is_append(io)) {
339 LASSERT(io->ci_type == CIT_WRITE);
341 /* If there is LOV EA hole, then we may cannot locate
342 * the current file-tail exactly. */
343 if (unlikely(obj->lo_lsm->lsm_pattern &
348 lio->lis_endpos = OBD_OBJECT_EOF;
353 if (cl_io_is_trunc(io))
354 lio->lis_pos = io->u.ci_setattr.sa_attr.lvb_size;
357 lio->lis_endpos = OBD_OBJECT_EOF;
360 case CIT_DATA_VERSION:
362 lio->lis_endpos = OBD_OBJECT_EOF;
366 pgoff_t index = io->u.ci_fault.ft_index;
367 lio->lis_pos = cl_offset(io->ci_obj, index);
368 lio->lis_endpos = cl_offset(io->ci_obj, index + 1);
373 lio->lis_pos = io->u.ci_fsync.fi_start;
374 lio->lis_endpos = io->u.ci_fsync.fi_end;
379 lio->lis_pos = io->u.ci_ladvise.li_start;
380 lio->lis_endpos = io->u.ci_ladvise.li_end;
386 lio->lis_endpos = OBD_OBJECT_EOF;
396 static void lov_io_fini(const struct lu_env *env, const struct cl_io_slice *ios)
398 struct lov_io *lio = cl2lov_io(env, ios);
399 struct lov_object *lov = cl2lov(ios->cis_obj);
403 if (lio->lis_subs != NULL) {
404 for (i = 0; i < lio->lis_nr_subios; i++)
405 lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
406 OBD_FREE_LARGE(lio->lis_subs,
407 lio->lis_nr_subios * sizeof lio->lis_subs[0]);
408 lio->lis_nr_subios = 0;
411 LASSERT(atomic_read(&lov->lo_active_ios) > 0);
412 if (atomic_dec_and_test(&lov->lo_active_ios))
413 wake_up_all(&lov->lo_waitq);
417 static loff_t lov_offset_mod(loff_t val, int delta)
419 if (val != OBD_OBJECT_EOF)
424 static int lov_io_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 lov_stripe_md *lsm = lio->lis_object->lo_lsm;
429 struct lov_io_sub *sub;
437 endpos = lov_offset_mod(lio->lis_endpos, -1);
438 for (stripe = 0; stripe < lio->lis_stripe_count; stripe++) {
439 if (!lov_stripe_intersects(lsm, stripe, lio->lis_pos,
440 endpos, &start, &end))
443 if (unlikely(lov_r0(lio->lis_object)->lo_sub[stripe] == NULL)) {
444 if (ios->cis_io->ci_type == CIT_READ ||
445 ios->cis_io->ci_type == CIT_WRITE ||
446 ios->cis_io->ci_type == CIT_FAULT)
452 end = lov_offset_mod(end, +1);
453 sub = lov_sub_get(env, lio, stripe);
459 lov_io_sub_inherit(sub->sub_io, lio, stripe, start, end);
460 rc = cl_io_iter_init(sub->sub_env, sub->sub_io);
462 cl_io_iter_fini(sub->sub_env, sub->sub_io);
467 CDEBUG(D_VFSTRACE, "shrink: %d ["LPU64", "LPU64")\n",
470 list_add_tail(&sub->sub_linkage, &lio->lis_active);
475 static int lov_io_rw_iter_init(const struct lu_env *env,
476 const struct cl_io_slice *ios)
478 struct lov_io *lio = cl2lov_io(env, ios);
479 struct cl_io *io = ios->cis_io;
480 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
481 loff_t start = io->u.ci_rw.crw_pos;
483 unsigned long ssize = lsm->lsm_stripe_size;
485 LASSERT(io->ci_type == CIT_READ || io->ci_type == CIT_WRITE);
488 /* fast path for common case. */
489 if (lio->lis_nr_subios != 1 && !cl_io_is_append(io)) {
491 lov_do_div64(start, ssize);
492 next = (start + 1) * ssize;
493 if (next <= start * ssize)
496 io->ci_continue = next < lio->lis_io_endpos;
497 io->u.ci_rw.crw_count = min_t(loff_t, lio->lis_io_endpos,
498 next) - io->u.ci_rw.crw_pos;
499 lio->lis_pos = io->u.ci_rw.crw_pos;
500 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
501 CDEBUG(D_VFSTRACE, "stripe: "LPU64" chunk: ["LPU64", "LPU64") "
502 LPU64"\n", (__u64)start, lio->lis_pos, lio->lis_endpos,
503 (__u64)lio->lis_io_endpos);
506 * XXX The following call should be optimized: we know, that
507 * [lio->lis_pos, lio->lis_endpos) intersects with exactly one stripe.
509 RETURN(lov_io_iter_init(env, ios));
512 static int lov_io_call(const struct lu_env *env, struct lov_io *lio,
513 int (*iofunc)(const struct lu_env *, struct cl_io *))
515 struct cl_io *parent = lio->lis_cl.cis_io;
516 struct lov_io_sub *sub;
520 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
522 rc = iofunc(sub->sub_env, sub->sub_io);
527 if (parent->ci_result == 0)
528 parent->ci_result = sub->sub_io->ci_result;
533 static int lov_io_lock(const struct lu_env *env, const struct cl_io_slice *ios)
536 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_lock));
539 static int lov_io_start(const struct lu_env *env, const struct cl_io_slice *ios)
542 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_start));
545 static int lov_io_end_wrapper(const struct lu_env *env, struct cl_io *io)
549 * It's possible that lov_io_start() wasn't called against this
550 * sub-io, either because previous sub-io failed, or upper layer
553 if (io->ci_state == CIS_IO_GOING)
556 io->ci_state = CIS_IO_FINISHED;
560 static int lov_io_iter_fini_wrapper(const struct lu_env *env, struct cl_io *io)
562 cl_io_iter_fini(env, io);
566 static int lov_io_unlock_wrapper(const struct lu_env *env, struct cl_io *io)
568 cl_io_unlock(env, io);
572 static void lov_io_end(const struct lu_env *env, const struct cl_io_slice *ios)
576 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_end_wrapper);
581 lov_io_data_version_end(const struct lu_env *env, const struct cl_io_slice *ios)
583 struct lov_io *lio = cl2lov_io(env, ios);
584 struct cl_io *parent = lio->lis_cl.cis_io;
585 struct lov_io_sub *sub;
588 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
589 lov_io_end_wrapper(env, sub->sub_io);
591 parent->u.ci_data_version.dv_data_version +=
592 sub->sub_io->u.ci_data_version.dv_data_version;
594 if (parent->ci_result == 0)
595 parent->ci_result = sub->sub_io->ci_result;
601 static void lov_io_iter_fini(const struct lu_env *env,
602 const struct cl_io_slice *ios)
604 struct lov_io *lio = cl2lov_io(env, ios);
608 rc = lov_io_call(env, lio, lov_io_iter_fini_wrapper);
610 while (!list_empty(&lio->lis_active))
611 list_del_init(lio->lis_active.next);
615 static void lov_io_unlock(const struct lu_env *env,
616 const struct cl_io_slice *ios)
621 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_unlock_wrapper);
626 static int lov_io_read_ahead(const struct lu_env *env,
627 const struct cl_io_slice *ios,
628 pgoff_t start, struct cl_read_ahead *ra)
630 struct lov_io *lio = cl2lov_io(env, ios);
631 struct lov_object *loo = lio->lis_object;
632 struct cl_object *obj = lov2cl(loo);
633 struct lov_layout_raid0 *r0 = lov_r0(loo);
634 struct lov_io_sub *sub;
637 unsigned int pps; /* pages per stripe */
642 stripe = lov_stripe_number(loo->lo_lsm, cl_offset(obj, start));
643 if (unlikely(r0->lo_sub[stripe] == NULL))
646 sub = lov_sub_get(env, lio, stripe);
648 lov_stripe_offset(loo->lo_lsm, cl_offset(obj, start), stripe, &suboff);
649 rc = cl_io_read_ahead(sub->sub_env, sub->sub_io,
650 cl_index(lovsub2cl(r0->lo_sub[stripe]), suboff),
654 CDEBUG(D_READA, DFID " cra_end = %lu, stripes = %d, rc = %d\n",
655 PFID(lu_object_fid(lov2lu(loo))), ra->cra_end, r0->lo_nr, rc);
660 * Adjust the stripe index by layout of raid0. ra->cra_end is the maximum
661 * page index covered by an underlying DLM lock.
662 * This function converts cra_end from stripe level to file level, and
663 * make sure it's not beyond stripe boundary.
665 if (r0->lo_nr == 1) /* single stripe file */
668 /* cra_end is stripe level, convert it into file level */
669 ra_end = ra->cra_end;
670 if (ra_end != CL_PAGE_EOF)
671 ra_end = lov_stripe_pgoff(loo->lo_lsm, ra_end, stripe);
673 pps = loo->lo_lsm->lsm_stripe_size >> PAGE_CACHE_SHIFT;
675 CDEBUG(D_READA, DFID " max_index = %lu, pps = %u, "
676 "stripe_size = %u, stripe no = %u, start index = %lu\n",
677 PFID(lu_object_fid(lov2lu(loo))), ra_end, pps,
678 loo->lo_lsm->lsm_stripe_size, stripe, start);
680 /* never exceed the end of the stripe */
681 ra->cra_end = min_t(pgoff_t, ra_end, start + pps - start % pps - 1);
686 * lov implementation of cl_operations::cio_submit() method. It takes a list
687 * of pages in \a queue, splits it into per-stripe sub-lists, invokes
688 * cl_io_submit() on underlying devices to submit sub-lists, and then splices
691 * Major complication of this function is a need to handle memory cleansing:
692 * cl_io_submit() is called to write out pages as a part of VM memory
693 * reclamation, and hence it may not fail due to memory shortages (system
694 * dead-locks otherwise). To deal with this, some resources (sub-lists,
695 * sub-environment, etc.) are allocated per-device on "startup" (i.e., in a
696 * not-memory cleansing context), and in case of memory shortage, these
697 * pre-allocated resources are used by lov_io_submit() under
698 * lov_device::ld_mutex mutex.
700 static int lov_io_submit(const struct lu_env *env,
701 const struct cl_io_slice *ios,
702 enum cl_req_type crt, struct cl_2queue *queue)
704 struct cl_page_list *qin = &queue->c2_qin;
705 struct lov_io *lio = cl2lov_io(env, ios);
706 struct lov_io_sub *sub;
707 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
708 struct cl_page *page;
713 if (lio->lis_active_subios == 1) {
714 int idx = lio->lis_single_subio_index;
716 LASSERT(idx < lio->lis_nr_subios);
717 sub = lov_sub_get(env, lio, idx);
718 LASSERT(!IS_ERR(sub));
719 LASSERT(sub->sub_io == &lio->lis_single_subio);
720 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
726 LASSERT(lio->lis_subs != NULL);
728 cl_page_list_init(plist);
729 while (qin->pl_nr > 0) {
730 struct cl_2queue *cl2q = &lov_env_info(env)->lti_cl2q;
732 cl_2queue_init(cl2q);
734 page = cl_page_list_first(qin);
735 cl_page_list_move(&cl2q->c2_qin, qin, page);
737 stripe = lov_page_stripe(page);
738 while (qin->pl_nr > 0) {
739 page = cl_page_list_first(qin);
740 if (stripe != lov_page_stripe(page))
743 cl_page_list_move(&cl2q->c2_qin, qin, page);
746 sub = lov_sub_get(env, lio, stripe);
748 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
755 cl_page_list_splice(&cl2q->c2_qin, plist);
756 cl_page_list_splice(&cl2q->c2_qout, &queue->c2_qout);
757 cl_2queue_fini(env, cl2q);
763 cl_page_list_splice(plist, qin);
764 cl_page_list_fini(env, plist);
769 static int lov_io_commit_async(const struct lu_env *env,
770 const struct cl_io_slice *ios,
771 struct cl_page_list *queue, int from, int to,
774 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
775 struct lov_io *lio = cl2lov_io(env, ios);
776 struct lov_io_sub *sub;
777 struct cl_page *page;
781 if (lio->lis_active_subios == 1) {
782 int idx = lio->lis_single_subio_index;
784 LASSERT(idx < lio->lis_nr_subios);
785 sub = lov_sub_get(env, lio, idx);
786 LASSERT(!IS_ERR(sub));
787 LASSERT(sub->sub_io == &lio->lis_single_subio);
788 rc = cl_io_commit_async(sub->sub_env, sub->sub_io, queue,
794 LASSERT(lio->lis_subs != NULL);
796 cl_page_list_init(plist);
797 while (queue->pl_nr > 0) {
801 LASSERT(plist->pl_nr == 0);
802 page = cl_page_list_first(queue);
803 cl_page_list_move(plist, queue, page);
805 stripe = lov_page_stripe(page);
806 while (queue->pl_nr > 0) {
807 page = cl_page_list_first(queue);
808 if (stripe != lov_page_stripe(page))
811 cl_page_list_move(plist, queue, page);
814 if (queue->pl_nr > 0) /* still has more pages */
815 stripe_to = PAGE_SIZE;
817 sub = lov_sub_get(env, lio, stripe);
819 rc = cl_io_commit_async(sub->sub_env, sub->sub_io,
820 plist, from, stripe_to, cb);
827 if (plist->pl_nr > 0) /* short write */
833 /* for error case, add the page back into the qin list */
834 LASSERT(ergo(rc == 0, plist->pl_nr == 0));
835 while (plist->pl_nr > 0) {
836 /* error occurred, add the uncommitted pages back into queue */
837 page = cl_page_list_last(plist);
838 cl_page_list_move_head(queue, plist, page);
844 static int lov_io_fault_start(const struct lu_env *env,
845 const struct cl_io_slice *ios)
847 struct cl_fault_io *fio;
849 struct lov_io_sub *sub;
852 fio = &ios->cis_io->u.ci_fault;
853 lio = cl2lov_io(env, ios);
854 sub = lov_sub_get(env, lio, lov_page_stripe(fio->ft_page));
855 sub->sub_io->u.ci_fault.ft_nob = fio->ft_nob;
857 RETURN(lov_io_start(env, ios));
860 static void lov_io_fsync_end(const struct lu_env *env,
861 const struct cl_io_slice *ios)
863 struct lov_io *lio = cl2lov_io(env, ios);
864 struct lov_io_sub *sub;
865 unsigned int *written = &ios->cis_io->u.ci_fsync.fi_nr_written;
869 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
870 struct cl_io *subio = sub->sub_io;
873 lov_io_end_wrapper(sub->sub_env, subio);
876 if (subio->ci_result == 0)
877 *written += subio->u.ci_fsync.fi_nr_written;
882 static const struct cl_io_operations lov_io_ops = {
885 .cio_fini = lov_io_fini,
886 .cio_iter_init = lov_io_rw_iter_init,
887 .cio_iter_fini = lov_io_iter_fini,
888 .cio_lock = lov_io_lock,
889 .cio_unlock = lov_io_unlock,
890 .cio_start = lov_io_start,
891 .cio_end = lov_io_end
894 .cio_fini = lov_io_fini,
895 .cio_iter_init = lov_io_rw_iter_init,
896 .cio_iter_fini = lov_io_iter_fini,
897 .cio_lock = lov_io_lock,
898 .cio_unlock = lov_io_unlock,
899 .cio_start = lov_io_start,
900 .cio_end = lov_io_end
903 .cio_fini = lov_io_fini,
904 .cio_iter_init = lov_io_iter_init,
905 .cio_iter_fini = lov_io_iter_fini,
906 .cio_lock = lov_io_lock,
907 .cio_unlock = lov_io_unlock,
908 .cio_start = lov_io_start,
909 .cio_end = lov_io_end
911 [CIT_DATA_VERSION] = {
912 .cio_fini = lov_io_fini,
913 .cio_iter_init = lov_io_iter_init,
914 .cio_iter_fini = lov_io_iter_fini,
915 .cio_lock = lov_io_lock,
916 .cio_unlock = lov_io_unlock,
917 .cio_start = lov_io_start,
918 .cio_end = lov_io_data_version_end,
921 .cio_fini = lov_io_fini,
922 .cio_iter_init = lov_io_iter_init,
923 .cio_iter_fini = lov_io_iter_fini,
924 .cio_lock = lov_io_lock,
925 .cio_unlock = lov_io_unlock,
926 .cio_start = lov_io_fault_start,
927 .cio_end = lov_io_end
930 .cio_fini = lov_io_fini,
931 .cio_iter_init = lov_io_iter_init,
932 .cio_iter_fini = lov_io_iter_fini,
933 .cio_lock = lov_io_lock,
934 .cio_unlock = lov_io_unlock,
935 .cio_start = lov_io_start,
936 .cio_end = lov_io_fsync_end
939 .cio_fini = lov_io_fini,
940 .cio_iter_init = lov_io_iter_init,
941 .cio_iter_fini = lov_io_iter_fini,
942 .cio_lock = lov_io_lock,
943 .cio_unlock = lov_io_unlock,
944 .cio_start = lov_io_start,
945 .cio_end = lov_io_end
948 .cio_fini = lov_io_fini
951 .cio_read_ahead = lov_io_read_ahead,
952 .cio_submit = lov_io_submit,
953 .cio_commit_async = lov_io_commit_async,
956 /*****************************************************************************
958 * Empty lov io operations.
962 static void lov_empty_io_fini(const struct lu_env *env,
963 const struct cl_io_slice *ios)
965 struct lov_object *lov = cl2lov(ios->cis_obj);
968 if (atomic_dec_and_test(&lov->lo_active_ios))
969 wake_up_all(&lov->lo_waitq);
973 static int lov_empty_io_submit(const struct lu_env *env,
974 const struct cl_io_slice *ios,
975 enum cl_req_type crt, struct cl_2queue *queue)
980 static void lov_empty_impossible(const struct lu_env *env,
981 struct cl_io_slice *ios)
986 #define LOV_EMPTY_IMPOSSIBLE ((void *)lov_empty_impossible)
989 * An io operation vector for files without stripes.
991 static const struct cl_io_operations lov_empty_io_ops = {
994 .cio_fini = lov_empty_io_fini,
996 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
997 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
998 .cio_start = LOV_EMPTY_IMPOSSIBLE,
999 .cio_end = LOV_EMPTY_IMPOSSIBLE
1003 .cio_fini = lov_empty_io_fini,
1004 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
1005 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
1006 .cio_start = LOV_EMPTY_IMPOSSIBLE,
1007 .cio_end = LOV_EMPTY_IMPOSSIBLE
1010 .cio_fini = lov_empty_io_fini,
1011 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
1012 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
1013 .cio_start = LOV_EMPTY_IMPOSSIBLE,
1014 .cio_end = LOV_EMPTY_IMPOSSIBLE
1017 .cio_fini = lov_empty_io_fini,
1018 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
1019 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
1020 .cio_start = LOV_EMPTY_IMPOSSIBLE,
1021 .cio_end = LOV_EMPTY_IMPOSSIBLE
1024 .cio_fini = lov_empty_io_fini
1027 .cio_fini = lov_empty_io_fini
1030 .cio_fini = lov_empty_io_fini
1033 .cio_submit = lov_empty_io_submit,
1034 .cio_commit_async = LOV_EMPTY_IMPOSSIBLE
1037 int lov_io_init_raid0(const struct lu_env *env, struct cl_object *obj,
1040 struct lov_io *lio = lov_env_io(env);
1041 struct lov_object *lov = cl2lov(obj);
1044 INIT_LIST_HEAD(&lio->lis_active);
1045 io->ci_result = lov_io_slice_init(lio, lov, io);
1046 if (io->ci_result != 0)
1047 RETURN(io->ci_result);
1049 if (io->ci_result == 0) {
1050 io->ci_result = lov_io_subio_init(env, lio, io);
1051 if (io->ci_result == 0) {
1052 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_io_ops);
1053 atomic_inc(&lov->lo_active_ios);
1056 RETURN(io->ci_result);
1059 int lov_io_init_empty(const struct lu_env *env, struct cl_object *obj,
1062 struct lov_object *lov = cl2lov(obj);
1063 struct lov_io *lio = lov_env_io(env);
1067 lio->lis_object = lov;
1068 switch (io->ci_type) {
1078 case CIT_DATA_VERSION:
1086 CERROR("Page fault on a file without stripes: "DFID"\n",
1087 PFID(lu_object_fid(&obj->co_lu)));
1091 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
1092 atomic_inc(&lov->lo_active_ios);
1095 io->ci_result = result < 0 ? result : 0;
1099 int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
1102 struct lov_object *lov = cl2lov(obj);
1103 struct lov_io *lio = lov_env_io(env);
1107 LASSERT(lov->lo_lsm != NULL);
1108 lio->lis_object = lov;
1110 switch (io->ci_type) {
1112 LASSERTF(0, "invalid type %d\n", io->ci_type);
1116 case CIT_DATA_VERSION:
1120 /* the truncate to 0 is managed by MDT:
1121 * - in open, for open O_TRUNC
1122 * - in setattr, for truncate
1124 /* the truncate is for size > 0 so triggers a restore */
1125 if (cl_io_is_trunc(io)) {
1126 io->ci_restore_needed = 1;
1134 io->ci_restore_needed = 1;
1139 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
1140 atomic_inc(&lov->lo_active_ios);
1143 io->ci_result = result < 0 ? result : 0;