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;
186 /* obtain new environment */
187 cookie = cl_env_reenter();
188 sub->sub_env = cl_env_get(&sub->sub_refcheck);
189 cl_env_reexit(cookie);
190 if (IS_ERR(sub->sub_env))
191 result = PTR_ERR(sub->sub_env);
195 * First sub-io. Use ->lis_single_subio to
196 * avoid dynamic allocation.
198 if (lio->lis_active_subios == 0) {
199 sub->sub_io = &lio->lis_single_subio;
200 lio->lis_single_subio_index = stripe;
202 OBD_ALLOC_PTR(sub->sub_io);
203 if (sub->sub_io == NULL)
210 sub_obj = lovsub2cl(lov_r0(lov)->lo_sub[stripe]);
211 sub_io = sub->sub_io;
213 sub_io->ci_obj = sub_obj;
214 sub_io->ci_result = 0;
216 sub_io->ci_parent = io;
217 sub_io->ci_lockreq = io->ci_lockreq;
218 sub_io->ci_type = io->ci_type;
219 sub_io->ci_no_srvlock = io->ci_no_srvlock;
220 sub_io->ci_noatime = io->ci_noatime;
223 result = cl_io_sub_init(sub->sub_env, sub_io,
224 io->ci_type, sub_obj);
227 lio->lis_active_subios++;
228 sub->sub_io_initialized = 1;
233 lov_io_sub_fini(env, lio, sub);
237 struct lov_io_sub *lov_sub_get(const struct lu_env *env,
238 struct lov_io *lio, int stripe)
241 struct lov_io_sub *sub = &lio->lis_subs[stripe];
243 LASSERT(stripe < lio->lis_stripe_count);
246 if (!sub->sub_io_initialized) {
247 sub->sub_stripe = stripe;
248 rc = lov_io_sub_init(env, lio, sub);
258 void lov_sub_put(struct lov_io_sub *sub)
263 /*****************************************************************************
269 int lov_page_stripe(const struct cl_page *page)
271 const struct cl_page_slice *slice;
274 slice = cl_page_at(page, &lov_device_type);
275 LASSERT(slice != NULL);
276 LASSERT(slice->cpl_obj != NULL);
278 RETURN(cl2lov_page(slice)->lps_stripe);
281 struct lov_io_sub *lov_page_subio(const struct lu_env *env, struct lov_io *lio,
282 const struct cl_page_slice *slice)
284 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
285 struct cl_page *page = slice->cpl_page;
288 LASSERT(lio->lis_cl.cis_io != NULL);
289 LASSERT(cl2lov(slice->cpl_obj) == lio->lis_object);
290 LASSERT(lsm != NULL);
291 LASSERT(lio->lis_nr_subios > 0);
294 stripe = lov_page_stripe(page);
295 RETURN(lov_sub_get(env, lio, stripe));
299 static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
302 struct lov_stripe_md *lsm;
306 LASSERT(lio->lis_object != NULL);
307 lsm = lio->lis_object->lo_lsm;
310 * Need to be optimized, we can't afford to allocate a piece of memory
311 * when writing a page. -jay
313 OBD_ALLOC_LARGE(lio->lis_subs,
314 lsm->lsm_stripe_count * sizeof lio->lis_subs[0]);
315 if (lio->lis_subs != NULL) {
316 lio->lis_nr_subios = lio->lis_stripe_count;
317 lio->lis_single_subio_index = -1;
318 lio->lis_active_subios = 0;
326 static int lov_io_slice_init(struct lov_io *lio,
327 struct lov_object *obj, struct cl_io *io)
332 lio->lis_object = obj;
334 LASSERT(obj->lo_lsm != NULL);
335 lio->lis_stripe_count = obj->lo_lsm->lsm_stripe_count;
337 switch (io->ci_type) {
340 lio->lis_pos = io->u.ci_rw.crw_pos;
341 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
342 lio->lis_io_endpos = lio->lis_endpos;
343 if (cl_io_is_append(io)) {
344 LASSERT(io->ci_type == CIT_WRITE);
346 /* If there is LOV EA hole, then we may cannot locate
347 * the current file-tail exactly. */
348 if (unlikely(obj->lo_lsm->lsm_pattern &
353 lio->lis_endpos = OBD_OBJECT_EOF;
358 if (cl_io_is_trunc(io))
359 lio->lis_pos = io->u.ci_setattr.sa_attr.lvb_size;
362 lio->lis_endpos = OBD_OBJECT_EOF;
365 case CIT_DATA_VERSION:
367 lio->lis_endpos = OBD_OBJECT_EOF;
371 pgoff_t index = io->u.ci_fault.ft_index;
372 lio->lis_pos = cl_offset(io->ci_obj, index);
373 lio->lis_endpos = cl_offset(io->ci_obj, index + 1);
378 lio->lis_pos = io->u.ci_fsync.fi_start;
379 lio->lis_endpos = io->u.ci_fsync.fi_end;
384 lio->lis_pos = io->u.ci_ladvise.li_start;
385 lio->lis_endpos = io->u.ci_ladvise.li_end;
391 lio->lis_endpos = OBD_OBJECT_EOF;
401 static void lov_io_fini(const struct lu_env *env, const struct cl_io_slice *ios)
403 struct lov_io *lio = cl2lov_io(env, ios);
404 struct lov_object *lov = cl2lov(ios->cis_obj);
408 if (lio->lis_subs != NULL) {
409 for (i = 0; i < lio->lis_nr_subios; i++)
410 lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
411 OBD_FREE_LARGE(lio->lis_subs,
412 lio->lis_nr_subios * sizeof lio->lis_subs[0]);
413 lio->lis_nr_subios = 0;
416 LASSERT(atomic_read(&lov->lo_active_ios) > 0);
417 if (atomic_dec_and_test(&lov->lo_active_ios))
418 wake_up_all(&lov->lo_waitq);
422 static loff_t lov_offset_mod(loff_t val, int delta)
424 if (val != OBD_OBJECT_EOF)
429 static int lov_io_iter_init(const struct lu_env *env,
430 const struct cl_io_slice *ios)
432 struct lov_io *lio = cl2lov_io(env, ios);
433 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
434 struct lov_io_sub *sub;
442 endpos = lov_offset_mod(lio->lis_endpos, -1);
443 for (stripe = 0; stripe < lio->lis_stripe_count; stripe++) {
444 if (!lov_stripe_intersects(lsm, stripe, lio->lis_pos,
445 endpos, &start, &end))
448 if (unlikely(lov_r0(lio->lis_object)->lo_sub[stripe] == NULL)) {
449 if (ios->cis_io->ci_type == CIT_READ ||
450 ios->cis_io->ci_type == CIT_WRITE ||
451 ios->cis_io->ci_type == CIT_FAULT)
457 end = lov_offset_mod(end, +1);
458 sub = lov_sub_get(env, lio, stripe);
464 lov_io_sub_inherit(sub->sub_io, lio, stripe, start, end);
465 rc = cl_io_iter_init(sub->sub_env, sub->sub_io);
467 cl_io_iter_fini(sub->sub_env, sub->sub_io);
472 CDEBUG(D_VFSTRACE, "shrink: %d ["LPU64", "LPU64")\n",
475 list_add_tail(&sub->sub_linkage, &lio->lis_active);
480 static int lov_io_rw_iter_init(const struct lu_env *env,
481 const struct cl_io_slice *ios)
483 struct lov_io *lio = cl2lov_io(env, ios);
484 struct cl_io *io = ios->cis_io;
485 struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
486 loff_t start = io->u.ci_rw.crw_pos;
488 unsigned long ssize = lsm->lsm_stripe_size;
490 LASSERT(io->ci_type == CIT_READ || io->ci_type == CIT_WRITE);
493 /* fast path for common case. */
494 if (lio->lis_nr_subios != 1 && !cl_io_is_append(io)) {
496 lov_do_div64(start, ssize);
497 next = (start + 1) * ssize;
498 if (next <= start * ssize)
501 io->ci_continue = next < lio->lis_io_endpos;
502 io->u.ci_rw.crw_count = min_t(loff_t, lio->lis_io_endpos,
503 next) - io->u.ci_rw.crw_pos;
504 lio->lis_pos = io->u.ci_rw.crw_pos;
505 lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
506 CDEBUG(D_VFSTRACE, "stripe: "LPU64" chunk: ["LPU64", "LPU64") "
507 LPU64"\n", (__u64)start, lio->lis_pos, lio->lis_endpos,
508 (__u64)lio->lis_io_endpos);
511 * XXX The following call should be optimized: we know, that
512 * [lio->lis_pos, lio->lis_endpos) intersects with exactly one stripe.
514 RETURN(lov_io_iter_init(env, ios));
517 static int lov_io_call(const struct lu_env *env, struct lov_io *lio,
518 int (*iofunc)(const struct lu_env *, struct cl_io *))
520 struct cl_io *parent = lio->lis_cl.cis_io;
521 struct lov_io_sub *sub;
525 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
527 rc = iofunc(sub->sub_env, sub->sub_io);
532 if (parent->ci_result == 0)
533 parent->ci_result = sub->sub_io->ci_result;
538 static int lov_io_lock(const struct lu_env *env, const struct cl_io_slice *ios)
541 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_lock));
544 static int lov_io_start(const struct lu_env *env, const struct cl_io_slice *ios)
547 RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_start));
550 static int lov_io_end_wrapper(const struct lu_env *env, struct cl_io *io)
554 * It's possible that lov_io_start() wasn't called against this
555 * sub-io, either because previous sub-io failed, or upper layer
558 if (io->ci_state == CIS_IO_GOING)
561 io->ci_state = CIS_IO_FINISHED;
565 static int lov_io_iter_fini_wrapper(const struct lu_env *env, struct cl_io *io)
567 cl_io_iter_fini(env, io);
571 static int lov_io_unlock_wrapper(const struct lu_env *env, struct cl_io *io)
573 cl_io_unlock(env, io);
577 static void lov_io_end(const struct lu_env *env, const struct cl_io_slice *ios)
581 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_end_wrapper);
586 lov_io_data_version_end(const struct lu_env *env, const struct cl_io_slice *ios)
588 struct lov_io *lio = cl2lov_io(env, ios);
589 struct cl_io *parent = lio->lis_cl.cis_io;
590 struct lov_io_sub *sub;
593 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
594 lov_io_end_wrapper(env, sub->sub_io);
596 parent->u.ci_data_version.dv_data_version +=
597 sub->sub_io->u.ci_data_version.dv_data_version;
599 if (parent->ci_result == 0)
600 parent->ci_result = sub->sub_io->ci_result;
606 static void lov_io_iter_fini(const struct lu_env *env,
607 const struct cl_io_slice *ios)
609 struct lov_io *lio = cl2lov_io(env, ios);
613 rc = lov_io_call(env, lio, lov_io_iter_fini_wrapper);
615 while (!list_empty(&lio->lis_active))
616 list_del_init(lio->lis_active.next);
620 static void lov_io_unlock(const struct lu_env *env,
621 const struct cl_io_slice *ios)
626 rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_unlock_wrapper);
631 static int lov_io_read_ahead(const struct lu_env *env,
632 const struct cl_io_slice *ios,
633 pgoff_t start, struct cl_read_ahead *ra)
635 struct lov_io *lio = cl2lov_io(env, ios);
636 struct lov_object *loo = lio->lis_object;
637 struct cl_object *obj = lov2cl(loo);
638 struct lov_layout_raid0 *r0 = lov_r0(loo);
639 struct lov_io_sub *sub;
642 unsigned int pps; /* pages per stripe */
647 stripe = lov_stripe_number(loo->lo_lsm, cl_offset(obj, start));
648 if (unlikely(r0->lo_sub[stripe] == NULL))
651 sub = lov_sub_get(env, lio, stripe);
653 lov_stripe_offset(loo->lo_lsm, cl_offset(obj, start), stripe, &suboff);
654 rc = cl_io_read_ahead(sub->sub_env, sub->sub_io,
655 cl_index(lovsub2cl(r0->lo_sub[stripe]), suboff),
659 CDEBUG(D_READA, DFID " cra_end = %lu, stripes = %d, rc = %d\n",
660 PFID(lu_object_fid(lov2lu(loo))), ra->cra_end, r0->lo_nr, rc);
665 * Adjust the stripe index by layout of raid0. ra->cra_end is the maximum
666 * page index covered by an underlying DLM lock.
667 * This function converts cra_end from stripe level to file level, and
668 * make sure it's not beyond stripe boundary.
670 if (r0->lo_nr == 1) /* single stripe file */
673 /* cra_end is stripe level, convert it into file level */
674 ra_end = ra->cra_end;
675 if (ra_end != CL_PAGE_EOF)
676 ra_end = lov_stripe_pgoff(loo->lo_lsm, ra_end, stripe);
678 pps = loo->lo_lsm->lsm_stripe_size >> PAGE_CACHE_SHIFT;
680 CDEBUG(D_READA, DFID " max_index = %lu, pps = %u, "
681 "stripe_size = %u, stripe no = %u, start index = %lu\n",
682 PFID(lu_object_fid(lov2lu(loo))), ra_end, pps,
683 loo->lo_lsm->lsm_stripe_size, stripe, start);
685 /* never exceed the end of the stripe */
686 ra->cra_end = min_t(pgoff_t, ra_end, start + pps - start % pps - 1);
691 * lov implementation of cl_operations::cio_submit() method. It takes a list
692 * of pages in \a queue, splits it into per-stripe sub-lists, invokes
693 * cl_io_submit() on underlying devices to submit sub-lists, and then splices
696 * Major complication of this function is a need to handle memory cleansing:
697 * cl_io_submit() is called to write out pages as a part of VM memory
698 * reclamation, and hence it may not fail due to memory shortages (system
699 * dead-locks otherwise). To deal with this, some resources (sub-lists,
700 * sub-environment, etc.) are allocated per-device on "startup" (i.e., in a
701 * not-memory cleansing context), and in case of memory shortage, these
702 * pre-allocated resources are used by lov_io_submit() under
703 * lov_device::ld_mutex mutex.
705 static int lov_io_submit(const struct lu_env *env,
706 const struct cl_io_slice *ios,
707 enum cl_req_type crt, struct cl_2queue *queue)
709 struct cl_page_list *qin = &queue->c2_qin;
710 struct lov_io *lio = cl2lov_io(env, ios);
711 struct lov_io_sub *sub;
712 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
713 struct cl_page *page;
718 if (lio->lis_active_subios == 1) {
719 int idx = lio->lis_single_subio_index;
721 LASSERT(idx < lio->lis_nr_subios);
722 sub = lov_sub_get(env, lio, idx);
723 LASSERT(!IS_ERR(sub));
724 LASSERT(sub->sub_io == &lio->lis_single_subio);
725 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
731 LASSERT(lio->lis_subs != NULL);
733 cl_page_list_init(plist);
734 while (qin->pl_nr > 0) {
735 struct cl_2queue *cl2q = &lov_env_info(env)->lti_cl2q;
737 cl_2queue_init(cl2q);
739 page = cl_page_list_first(qin);
740 cl_page_list_move(&cl2q->c2_qin, qin, page);
742 stripe = lov_page_stripe(page);
743 while (qin->pl_nr > 0) {
744 page = cl_page_list_first(qin);
745 if (stripe != lov_page_stripe(page))
748 cl_page_list_move(&cl2q->c2_qin, qin, page);
751 sub = lov_sub_get(env, lio, stripe);
753 rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
760 cl_page_list_splice(&cl2q->c2_qin, plist);
761 cl_page_list_splice(&cl2q->c2_qout, &queue->c2_qout);
762 cl_2queue_fini(env, cl2q);
768 cl_page_list_splice(plist, qin);
769 cl_page_list_fini(env, plist);
774 static int lov_io_commit_async(const struct lu_env *env,
775 const struct cl_io_slice *ios,
776 struct cl_page_list *queue, int from, int to,
779 struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
780 struct lov_io *lio = cl2lov_io(env, ios);
781 struct lov_io_sub *sub;
782 struct cl_page *page;
786 if (lio->lis_active_subios == 1) {
787 int idx = lio->lis_single_subio_index;
789 LASSERT(idx < lio->lis_nr_subios);
790 sub = lov_sub_get(env, lio, idx);
791 LASSERT(!IS_ERR(sub));
792 LASSERT(sub->sub_io == &lio->lis_single_subio);
793 rc = cl_io_commit_async(sub->sub_env, sub->sub_io, queue,
799 LASSERT(lio->lis_subs != NULL);
801 cl_page_list_init(plist);
802 while (queue->pl_nr > 0) {
806 LASSERT(plist->pl_nr == 0);
807 page = cl_page_list_first(queue);
808 cl_page_list_move(plist, queue, page);
810 stripe = lov_page_stripe(page);
811 while (queue->pl_nr > 0) {
812 page = cl_page_list_first(queue);
813 if (stripe != lov_page_stripe(page))
816 cl_page_list_move(plist, queue, page);
819 if (queue->pl_nr > 0) /* still has more pages */
820 stripe_to = PAGE_SIZE;
822 sub = lov_sub_get(env, lio, stripe);
824 rc = cl_io_commit_async(sub->sub_env, sub->sub_io,
825 plist, from, stripe_to, cb);
832 if (plist->pl_nr > 0) /* short write */
838 /* for error case, add the page back into the qin list */
839 LASSERT(ergo(rc == 0, plist->pl_nr == 0));
840 while (plist->pl_nr > 0) {
841 /* error occurred, add the uncommitted pages back into queue */
842 page = cl_page_list_last(plist);
843 cl_page_list_move_head(queue, plist, page);
849 static int lov_io_fault_start(const struct lu_env *env,
850 const struct cl_io_slice *ios)
852 struct cl_fault_io *fio;
854 struct lov_io_sub *sub;
857 fio = &ios->cis_io->u.ci_fault;
858 lio = cl2lov_io(env, ios);
859 sub = lov_sub_get(env, lio, lov_page_stripe(fio->ft_page));
860 sub->sub_io->u.ci_fault.ft_nob = fio->ft_nob;
862 RETURN(lov_io_start(env, ios));
865 static void lov_io_fsync_end(const struct lu_env *env,
866 const struct cl_io_slice *ios)
868 struct lov_io *lio = cl2lov_io(env, ios);
869 struct lov_io_sub *sub;
870 unsigned int *written = &ios->cis_io->u.ci_fsync.fi_nr_written;
874 list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
875 struct cl_io *subio = sub->sub_io;
878 lov_io_end_wrapper(sub->sub_env, subio);
881 if (subio->ci_result == 0)
882 *written += subio->u.ci_fsync.fi_nr_written;
887 static const struct cl_io_operations lov_io_ops = {
890 .cio_fini = lov_io_fini,
891 .cio_iter_init = lov_io_rw_iter_init,
892 .cio_iter_fini = lov_io_iter_fini,
893 .cio_lock = lov_io_lock,
894 .cio_unlock = lov_io_unlock,
895 .cio_start = lov_io_start,
896 .cio_end = lov_io_end
899 .cio_fini = lov_io_fini,
900 .cio_iter_init = lov_io_rw_iter_init,
901 .cio_iter_fini = lov_io_iter_fini,
902 .cio_lock = lov_io_lock,
903 .cio_unlock = lov_io_unlock,
904 .cio_start = lov_io_start,
905 .cio_end = lov_io_end
908 .cio_fini = lov_io_fini,
909 .cio_iter_init = lov_io_iter_init,
910 .cio_iter_fini = lov_io_iter_fini,
911 .cio_lock = lov_io_lock,
912 .cio_unlock = lov_io_unlock,
913 .cio_start = lov_io_start,
914 .cio_end = lov_io_end
916 [CIT_DATA_VERSION] = {
917 .cio_fini = lov_io_fini,
918 .cio_iter_init = lov_io_iter_init,
919 .cio_iter_fini = lov_io_iter_fini,
920 .cio_lock = lov_io_lock,
921 .cio_unlock = lov_io_unlock,
922 .cio_start = lov_io_start,
923 .cio_end = lov_io_data_version_end,
926 .cio_fini = lov_io_fini,
927 .cio_iter_init = lov_io_iter_init,
928 .cio_iter_fini = lov_io_iter_fini,
929 .cio_lock = lov_io_lock,
930 .cio_unlock = lov_io_unlock,
931 .cio_start = lov_io_fault_start,
932 .cio_end = lov_io_end
935 .cio_fini = lov_io_fini,
936 .cio_iter_init = lov_io_iter_init,
937 .cio_iter_fini = lov_io_iter_fini,
938 .cio_lock = lov_io_lock,
939 .cio_unlock = lov_io_unlock,
940 .cio_start = lov_io_start,
941 .cio_end = lov_io_fsync_end
944 .cio_fini = lov_io_fini,
945 .cio_iter_init = lov_io_iter_init,
946 .cio_iter_fini = lov_io_iter_fini,
947 .cio_lock = lov_io_lock,
948 .cio_unlock = lov_io_unlock,
949 .cio_start = lov_io_start,
950 .cio_end = lov_io_end
953 .cio_fini = lov_io_fini
956 .cio_read_ahead = lov_io_read_ahead,
957 .cio_submit = lov_io_submit,
958 .cio_commit_async = lov_io_commit_async,
961 /*****************************************************************************
963 * Empty lov io operations.
967 static void lov_empty_io_fini(const struct lu_env *env,
968 const struct cl_io_slice *ios)
970 struct lov_object *lov = cl2lov(ios->cis_obj);
973 if (atomic_dec_and_test(&lov->lo_active_ios))
974 wake_up_all(&lov->lo_waitq);
978 static int lov_empty_io_submit(const struct lu_env *env,
979 const struct cl_io_slice *ios,
980 enum cl_req_type crt, struct cl_2queue *queue)
985 static void lov_empty_impossible(const struct lu_env *env,
986 struct cl_io_slice *ios)
991 #define LOV_EMPTY_IMPOSSIBLE ((void *)lov_empty_impossible)
994 * An io operation vector for files without stripes.
996 static const struct cl_io_operations lov_empty_io_ops = {
999 .cio_fini = lov_empty_io_fini,
1001 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
1002 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
1003 .cio_start = LOV_EMPTY_IMPOSSIBLE,
1004 .cio_end = LOV_EMPTY_IMPOSSIBLE
1008 .cio_fini = lov_empty_io_fini,
1009 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
1010 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
1011 .cio_start = LOV_EMPTY_IMPOSSIBLE,
1012 .cio_end = LOV_EMPTY_IMPOSSIBLE
1015 .cio_fini = lov_empty_io_fini,
1016 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
1017 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
1018 .cio_start = LOV_EMPTY_IMPOSSIBLE,
1019 .cio_end = LOV_EMPTY_IMPOSSIBLE
1022 .cio_fini = lov_empty_io_fini,
1023 .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
1024 .cio_lock = LOV_EMPTY_IMPOSSIBLE,
1025 .cio_start = LOV_EMPTY_IMPOSSIBLE,
1026 .cio_end = LOV_EMPTY_IMPOSSIBLE
1029 .cio_fini = lov_empty_io_fini
1032 .cio_fini = lov_empty_io_fini
1035 .cio_fini = lov_empty_io_fini
1038 .cio_submit = lov_empty_io_submit,
1039 .cio_commit_async = LOV_EMPTY_IMPOSSIBLE
1042 int lov_io_init_raid0(const struct lu_env *env, struct cl_object *obj,
1045 struct lov_io *lio = lov_env_io(env);
1046 struct lov_object *lov = cl2lov(obj);
1049 INIT_LIST_HEAD(&lio->lis_active);
1050 io->ci_result = lov_io_slice_init(lio, lov, io);
1051 if (io->ci_result != 0)
1052 RETURN(io->ci_result);
1054 if (io->ci_result == 0) {
1055 io->ci_result = lov_io_subio_init(env, lio, io);
1056 if (io->ci_result == 0) {
1057 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_io_ops);
1058 atomic_inc(&lov->lo_active_ios);
1061 RETURN(io->ci_result);
1064 int lov_io_init_empty(const struct lu_env *env, struct cl_object *obj,
1067 struct lov_object *lov = cl2lov(obj);
1068 struct lov_io *lio = lov_env_io(env);
1072 lio->lis_object = lov;
1073 switch (io->ci_type) {
1083 case CIT_DATA_VERSION:
1091 CERROR("Page fault on a file without stripes: "DFID"\n",
1092 PFID(lu_object_fid(&obj->co_lu)));
1096 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
1097 atomic_inc(&lov->lo_active_ios);
1100 io->ci_result = result < 0 ? result : 0;
1104 int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
1107 struct lov_object *lov = cl2lov(obj);
1108 struct lov_io *lio = lov_env_io(env);
1112 LASSERT(lov->lo_lsm != NULL);
1113 lio->lis_object = lov;
1115 switch (io->ci_type) {
1117 LASSERTF(0, "invalid type %d\n", io->ci_type);
1121 case CIT_DATA_VERSION:
1125 /* the truncate to 0 is managed by MDT:
1126 * - in open, for open O_TRUNC
1127 * - in setattr, for truncate
1129 /* the truncate is for size > 0 so triggers a restore */
1130 if (cl_io_is_trunc(io)) {
1131 io->ci_restore_needed = 1;
1139 io->ci_restore_needed = 1;
1144 cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
1145 atomic_inc(&lov->lo_active_ios);
1148 io->ci_result = result < 0 ? result : 0;