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) 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
40 * Author: Nikita Danilov <nikita@clusterfs.com>
41 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
45 /* LUSTRE_VERSION_CODE */
46 #include <lustre_ver.h>
47 /* prerequisite for linux/xattr.h */
48 #include <linux/types.h>
49 /* prerequisite for linux/xattr.h */
53 * struct OBD_{ALLOC,FREE}*()
56 #include <obd_support.h>
58 #include "osd_internal.h"
61 #include <ldiskfs/ldiskfs_extents.h>
63 static int __osd_init_iobuf(struct osd_device *d, struct osd_iobuf *iobuf,
64 int rw, int line, int pages)
68 LASSERTF(iobuf->dr_elapsed_valid == 0,
69 "iobuf %p, reqs %d, rw %d, line %d\n", iobuf,
70 atomic_read(&iobuf->dr_numreqs), iobuf->dr_rw,
72 LASSERT(pages <= PTLRPC_MAX_BRW_PAGES);
74 init_waitqueue_head(&iobuf->dr_wait);
75 atomic_set(&iobuf->dr_numreqs, 0);
80 iobuf->dr_elapsed = 0;
81 /* must be counted before, so assert */
83 iobuf->dr_init_at = line;
85 blocks = pages * (PAGE_CACHE_SIZE >> osd_sb(d)->s_blocksize_bits);
86 if (iobuf->dr_bl_buf.lb_len >= blocks * sizeof(iobuf->dr_blocks[0])) {
87 LASSERT(iobuf->dr_pg_buf.lb_len >=
88 pages * sizeof(iobuf->dr_pages[0]));
92 /* start with 1MB for 4K blocks */
94 while (i <= PTLRPC_MAX_BRW_PAGES && i < pages)
97 CDEBUG(D_OTHER, "realloc %u for %u (%u) pages\n",
98 (unsigned)(pages * sizeof(iobuf->dr_pages[0])), i, pages);
100 blocks = pages * (PAGE_CACHE_SIZE >> osd_sb(d)->s_blocksize_bits);
101 iobuf->dr_max_pages = 0;
102 CDEBUG(D_OTHER, "realloc %u for %u blocks\n",
103 (unsigned)(blocks * sizeof(iobuf->dr_blocks[0])), blocks);
105 lu_buf_realloc(&iobuf->dr_bl_buf, blocks * sizeof(iobuf->dr_blocks[0]));
106 iobuf->dr_blocks = iobuf->dr_bl_buf.lb_buf;
107 if (unlikely(iobuf->dr_blocks == NULL))
110 lu_buf_realloc(&iobuf->dr_pg_buf, pages * sizeof(iobuf->dr_pages[0]));
111 iobuf->dr_pages = iobuf->dr_pg_buf.lb_buf;
112 if (unlikely(iobuf->dr_pages == NULL))
115 iobuf->dr_max_pages = pages;
119 #define osd_init_iobuf(dev, iobuf, rw, pages) \
120 __osd_init_iobuf(dev, iobuf, rw, __LINE__, pages)
122 static void osd_iobuf_add_page(struct osd_iobuf *iobuf, struct page *page)
124 LASSERT(iobuf->dr_npages < iobuf->dr_max_pages);
125 iobuf->dr_pages[iobuf->dr_npages++] = page;
128 void osd_fini_iobuf(struct osd_device *d, struct osd_iobuf *iobuf)
130 int rw = iobuf->dr_rw;
132 if (iobuf->dr_elapsed_valid) {
133 iobuf->dr_elapsed_valid = 0;
134 LASSERT(iobuf->dr_dev == d);
135 LASSERT(iobuf->dr_frags > 0);
136 lprocfs_oh_tally(&d->od_brw_stats.
137 hist[BRW_R_DIO_FRAGS+rw],
139 lprocfs_oh_tally_log2(&d->od_brw_stats.hist[BRW_R_IO_TIME+rw],
144 #ifndef REQ_WRITE /* pre-2.6.35 */
145 #define __REQ_WRITE BIO_RW
148 static void dio_complete_routine(struct bio *bio, int error)
150 struct osd_iobuf *iobuf = bio->bi_private;
154 /* CAVEAT EMPTOR: possibly in IRQ context
155 * DO NOT record procfs stats here!!! */
157 if (unlikely(iobuf == NULL)) {
158 CERROR("***** bio->bi_private is NULL! This should never "
159 "happen. Normally, I would crash here, but instead I "
160 "will dump the bio contents to the console. Please "
161 "report this to <http://jira.whamcloud.com/> , along "
162 "with any interesting messages leading up to this point "
163 "(like SCSI errors, perhaps). Because bi_private is "
164 "NULL, I can't wake up the thread that initiated this "
165 "IO - you will probably have to reboot this node.\n");
166 CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, "
167 "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, "
168 "bi_private: %p\n", bio->bi_next, bio->bi_flags,
169 bio->bi_rw, bio->bi_vcnt, bio->bi_idx, bio->bi_size,
170 bio->bi_end_io, atomic_read(&bio->bi_cnt),
175 /* the check is outside of the cycle for performance reason -bzzz */
176 if (!test_bit(__REQ_WRITE, &bio->bi_rw)) {
177 bio_for_each_segment(bvl, bio, i) {
178 if (likely(error == 0))
179 SetPageUptodate(bvl->bv_page);
180 LASSERT(PageLocked(bvl->bv_page));
182 atomic_dec(&iobuf->dr_dev->od_r_in_flight);
184 atomic_dec(&iobuf->dr_dev->od_w_in_flight);
187 /* any real error is good enough -bzzz */
188 if (error != 0 && iobuf->dr_error == 0)
189 iobuf->dr_error = error;
192 * set dr_elapsed before dr_numreqs turns to 0, otherwise
193 * it's possible that service thread will see dr_numreqs
194 * is zero, but dr_elapsed is not set yet, leading to lost
195 * data in this processing and an assertion in a subsequent
198 if (atomic_read(&iobuf->dr_numreqs) == 1) {
199 iobuf->dr_elapsed = jiffies - iobuf->dr_start_time;
200 iobuf->dr_elapsed_valid = 1;
202 if (atomic_dec_and_test(&iobuf->dr_numreqs))
203 wake_up(&iobuf->dr_wait);
205 /* Completed bios used to be chained off iobuf->dr_bios and freed in
206 * filter_clear_dreq(). It was then possible to exhaust the biovec-256
207 * mempool when serious on-disk fragmentation was encountered,
208 * deadlocking the OST. The bios are now released as soon as complete
209 * so the pool cannot be exhausted while IOs are competing. bug 10076 */
213 static void record_start_io(struct osd_iobuf *iobuf, int size)
215 struct osd_device *osd = iobuf->dr_dev;
216 struct obd_histogram *h = osd->od_brw_stats.hist;
219 atomic_inc(&iobuf->dr_numreqs);
221 if (iobuf->dr_rw == 0) {
222 atomic_inc(&osd->od_r_in_flight);
223 lprocfs_oh_tally(&h[BRW_R_RPC_HIST],
224 atomic_read(&osd->od_r_in_flight));
225 lprocfs_oh_tally_log2(&h[BRW_R_DISK_IOSIZE], size);
226 } else if (iobuf->dr_rw == 1) {
227 atomic_inc(&osd->od_w_in_flight);
228 lprocfs_oh_tally(&h[BRW_W_RPC_HIST],
229 atomic_read(&osd->od_w_in_flight));
230 lprocfs_oh_tally_log2(&h[BRW_W_DISK_IOSIZE], size);
236 static void osd_submit_bio(int rw, struct bio *bio)
238 LASSERTF(rw == 0 || rw == 1, "%x\n", rw);
240 submit_bio(READ, bio);
242 submit_bio(WRITE, bio);
245 static int can_be_merged(struct bio *bio, sector_t sector)
252 size = bio->bi_size >> 9;
253 return bio->bi_sector + size == sector ? 1 : 0;
256 static int osd_do_bio(struct osd_device *osd, struct inode *inode,
257 struct osd_iobuf *iobuf)
259 int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
260 struct page **pages = iobuf->dr_pages;
261 int npages = iobuf->dr_npages;
262 unsigned long *blocks = iobuf->dr_blocks;
263 int total_blocks = npages * blocks_per_page;
264 int sector_bits = inode->i_sb->s_blocksize_bits - 9;
265 unsigned int blocksize = inode->i_sb->s_blocksize;
266 struct bio *bio = NULL;
268 unsigned int page_offset;
277 LASSERT(iobuf->dr_npages == npages);
279 osd_brw_stats_update(osd, iobuf);
280 iobuf->dr_start_time = cfs_time_current();
282 for (page_idx = 0, block_idx = 0;
284 page_idx++, block_idx += blocks_per_page) {
286 page = pages[page_idx];
287 LASSERT(block_idx + blocks_per_page <= total_blocks);
289 for (i = 0, page_offset = 0;
291 i += nblocks, page_offset += blocksize * nblocks) {
295 if (blocks[block_idx + i] == 0) { /* hole */
296 LASSERTF(iobuf->dr_rw == 0,
297 "page_idx %u, block_idx %u, i %u\n",
298 page_idx, block_idx, i);
299 memset(kmap(page) + page_offset, 0, blocksize);
304 sector = (sector_t)blocks[block_idx + i] << sector_bits;
306 /* Additional contiguous file blocks? */
307 while (i + nblocks < blocks_per_page &&
308 (sector + (nblocks << sector_bits)) ==
309 ((sector_t)blocks[block_idx + i + nblocks] <<
314 can_be_merged(bio, sector) &&
315 bio_add_page(bio, page,
316 blocksize * nblocks, page_offset) != 0)
317 continue; /* added this frag OK */
320 struct request_queue *q =
321 bdev_get_queue(bio->bi_bdev);
323 /* Dang! I have to fragment this I/O */
324 CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) "
325 "sectors %d(%d) psg %d(%d) hsg %d(%d)\n",
327 bio->bi_vcnt, bio->bi_max_vecs,
328 bio->bi_size >> 9, queue_max_sectors(q),
329 bio_phys_segments(q, bio),
330 queue_max_phys_segments(q),
331 0, queue_max_hw_segments(q));
333 record_start_io(iobuf, bio->bi_size);
334 osd_submit_bio(iobuf->dr_rw, bio);
337 /* allocate new bio */
338 bio = bio_alloc(GFP_NOIO, min(BIO_MAX_PAGES,
339 (npages - page_idx) *
342 CERROR("Can't allocate bio %u*%u = %u pages\n",
343 (npages - page_idx), blocks_per_page,
344 (npages - page_idx) * blocks_per_page);
349 bio->bi_bdev = inode->i_sb->s_bdev;
350 bio->bi_sector = sector;
351 bio->bi_rw = (iobuf->dr_rw == 0) ? READ : WRITE;
352 bio->bi_end_io = dio_complete_routine;
353 bio->bi_private = iobuf;
355 rc = bio_add_page(bio, page,
356 blocksize * nblocks, page_offset);
362 record_start_io(iobuf, bio->bi_size);
363 osd_submit_bio(iobuf->dr_rw, bio);
368 /* in order to achieve better IO throughput, we don't wait for writes
369 * completion here. instead we proceed with transaction commit in
370 * parallel and wait for IO completion once transaction is stopped
371 * see osd_trans_stop() for more details -bzzz */
372 if (iobuf->dr_rw == 0) {
373 wait_event(iobuf->dr_wait,
374 atomic_read(&iobuf->dr_numreqs) == 0);
375 osd_fini_iobuf(osd, iobuf);
379 rc = iobuf->dr_error;
383 static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
384 struct niobuf_local *lnb)
391 int poff = offset & (PAGE_CACHE_SIZE - 1);
392 int plen = PAGE_CACHE_SIZE - poff;
396 lnb->lnb_file_offset = offset;
397 lnb->lnb_page_offset = poff;
399 /* lb->flags = rnb->flags; */
404 LASSERTF(plen <= len, "plen %u, len %lld\n", plen,
415 struct page *osd_get_page(struct dt_object *dt, loff_t offset, int rw)
417 struct inode *inode = osd_dt_obj(dt)->oo_inode;
418 struct osd_device *d = osd_obj2dev(osd_dt_obj(dt));
423 page = find_or_create_page(inode->i_mapping, offset >> PAGE_CACHE_SHIFT,
424 GFP_NOFS | __GFP_HIGHMEM);
425 if (unlikely(page == NULL))
426 lprocfs_counter_add(d->od_stats, LPROC_OSD_NO_PAGE, 1);
432 * there are following "locks":
449 int osd_bufs_get(const struct lu_env *env, struct dt_object *d, loff_t pos,
450 ssize_t len, struct niobuf_local *lnb, int rw,
451 struct lustre_capa *capa)
453 struct osd_object *obj = osd_dt_obj(d);
454 int npages, i, rc = 0;
456 LASSERT(obj->oo_inode);
458 osd_map_remote_to_local(pos, len, &npages, lnb);
460 for (i = 0; i < npages; i++, lnb++) {
461 lnb->page = osd_get_page(d, lnb->lnb_file_offset, rw);
462 if (lnb->page == NULL)
463 GOTO(cleanup, rc = -ENOMEM);
465 /* DLM locking protects us from write and truncate competing
466 * for same region, but truncate can leave dirty page in the
467 * cache. it's possible the writeout on a such a page is in
468 * progress when we access it. it's also possible that during
469 * this writeout we put new (partial) data, but then won't
470 * be able to proceed in filter_commitrw_write(). thus let's
471 * just wait for writeout completion, should be rare enough.
473 wait_on_page_writeback(lnb->page);
474 BUG_ON(PageWriteback(lnb->page));
476 lu_object_get(&d->do_lu);
484 static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
485 struct niobuf_local *lnb, int npages)
489 for (i = 0; i < npages; i++) {
490 if (lnb[i].page == NULL)
492 LASSERT(PageLocked(lnb[i].page));
493 unlock_page(lnb[i].page);
494 page_cache_release(lnb[i].page);
495 lu_object_put(env, &dt->do_lu);
501 #ifdef HAVE_EXT_PBLOCK /* Name changed to ext4_ext_pblock for kernel 2.6.35 */
502 #define ldiskfs_ext_pblock(ex) ext_pblock((ex))
506 unsigned long *blocks;
513 static long ldiskfs_ext_find_goal(struct inode *inode,
514 struct ldiskfs_ext_path *path,
515 unsigned long block, int *aflags)
517 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
518 unsigned long bg_start;
519 unsigned long colour;
523 struct ldiskfs_extent *ex;
524 depth = path->p_depth;
526 /* try to predict block placement */
527 if ((ex = path[depth].p_ext))
528 return ldiskfs_ext_pblock(ex) +
529 (block - le32_to_cpu(ex->ee_block));
531 /* it looks index is empty
532 * try to find starting from index itself */
533 if (path[depth].p_bh)
534 return path[depth].p_bh->b_blocknr;
537 /* OK. use inode's group */
538 bg_start = (ei->i_block_group * LDISKFS_BLOCKS_PER_GROUP(inode->i_sb)) +
539 le32_to_cpu(LDISKFS_SB(inode->i_sb)->s_es->s_first_data_block);
540 colour = (current->pid % 16) *
541 (LDISKFS_BLOCKS_PER_GROUP(inode->i_sb) / 16);
542 return bg_start + colour + block;
545 static unsigned long new_blocks(handle_t *handle, struct inode *inode,
546 struct ldiskfs_ext_path *path,
547 unsigned long block, unsigned long *count,
550 struct ldiskfs_allocation_request ar;
551 unsigned long pblock;
554 /* find neighbour allocated blocks */
556 *err = ldiskfs_ext_search_left(inode, path, &ar.lleft, &ar.pleft);
560 *err = ldiskfs_ext_search_right(inode, path, &ar.lright, &ar.pright);
564 /* allocate new block */
565 ar.goal = ldiskfs_ext_find_goal(inode, path, block, &aflags);
569 ar.flags = LDISKFS_MB_HINT_DATA;
570 pblock = ldiskfs_mb_new_blocks(handle, &ar, err);
575 static int ldiskfs_ext_new_extent_cb(struct inode *inode,
576 struct ldiskfs_ext_path *path,
577 struct ldiskfs_ext_cache *cex,
578 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
579 struct ldiskfs_extent *ex,
583 struct bpointers *bp = cbdata;
584 struct ldiskfs_extent nex;
585 unsigned long pblock;
591 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
592 if (cex->ec_type == LDISKFS_EXT_CACHE_EXTENT) {
594 if ((cex->ec_len != 0) && (cex->ec_start != 0)) {
600 if (bp->create == 0) {
602 if (cex->ec_block < bp->start)
603 i = bp->start - cex->ec_block;
604 if (i >= cex->ec_len)
605 CERROR("nothing to do?! i = %d, e_num = %u\n",
607 for (; i < cex->ec_len && bp->num; i++) {
617 tgen = LDISKFS_I(inode)->i_ext_generation;
618 count = ldiskfs_ext_calc_credits_for_insert(inode, path);
620 handle = ldiskfs_journal_start(inode, count + LDISKFS_ALLOC_NEEDED + 1);
621 if (IS_ERR(handle)) {
622 return PTR_ERR(handle);
625 if (tgen != LDISKFS_I(inode)->i_ext_generation) {
626 /* the tree has changed. so path can be invalid at moment */
627 ldiskfs_journal_stop(handle);
631 /* In 2.6.32 kernel, ldiskfs_ext_walk_space()'s callback func is not
632 * protected by i_data_sem as whole. so we patch it to store
633 * generation to path and now verify the tree hasn't changed */
634 down_write((&LDISKFS_I(inode)->i_data_sem));
636 /* validate extent, make sure the extent tree does not changed */
637 if (LDISKFS_I(inode)->i_ext_generation != path[0].p_generation) {
638 /* cex is invalid, try again */
639 up_write(&LDISKFS_I(inode)->i_data_sem);
640 ldiskfs_journal_stop(handle);
645 pblock = new_blocks(handle, inode, path, cex->ec_block, &count, &err);
648 BUG_ON(count > cex->ec_len);
650 /* insert new extent */
651 nex.ee_block = cpu_to_le32(cex->ec_block);
652 ldiskfs_ext_store_pblock(&nex, pblock);
653 nex.ee_len = cpu_to_le16(count);
654 err = ldiskfs_ext_insert_extent(handle, inode, path, &nex, 0);
656 /* free data blocks we just allocated */
657 /* not a good idea to call discard here directly,
658 * but otherwise we'd need to call it every free() */
659 ldiskfs_discard_preallocations(inode);
660 #ifdef HAVE_EXT_FREE_BLOCK_WITH_BUFFER_HEAD /* Introduced in 2.6.32-rc7 */
661 ldiskfs_free_blocks(handle, inode, NULL,
662 ldiskfs_ext_pblock(&nex),
663 le16_to_cpu(nex.ee_len), 0);
665 ldiskfs_free_blocks(handle, inode, ldiskfs_ext_pblock(&nex),
666 le16_to_cpu(nex.ee_len), 0);
672 * Putting len of the actual extent we just inserted,
673 * we are asking ldiskfs_ext_walk_space() to continue
674 * scaning after that block
676 cex->ec_len = le16_to_cpu(nex.ee_len);
677 cex->ec_start = ldiskfs_ext_pblock(&nex);
678 BUG_ON(le16_to_cpu(nex.ee_len) == 0);
679 BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
682 up_write((&LDISKFS_I(inode)->i_data_sem));
683 ldiskfs_journal_stop(handle);
688 CERROR("hmm. why do we find this extent?\n");
689 CERROR("initial space: %lu:%u\n",
690 bp->start, bp->init_num);
691 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
692 CERROR("current extent: %u/%u/%llu %d\n",
693 cex->ec_block, cex->ec_len,
694 (unsigned long long)cex->ec_start,
697 CERROR("current extent: %u/%u/%llu\n",
698 cex->ec_block, cex->ec_len,
699 (unsigned long long)cex->ec_start);
703 if (cex->ec_block < bp->start)
704 i = bp->start - cex->ec_block;
705 if (i >= cex->ec_len)
706 CERROR("nothing to do?! i = %d, e_num = %u\n",
708 for (; i < cex->ec_len && bp->num; i++) {
709 *(bp->blocks) = cex->ec_start + i;
710 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
711 if (cex->ec_type != LDISKFS_EXT_CACHE_EXTENT) {
713 if ((cex->ec_len == 0) || (cex->ec_start == 0)) {
715 /* unmap any possible underlying metadata from
716 * the block device mapping. bug 6998. */
717 unmap_underlying_metadata(inode->i_sb->s_bdev,
728 int osd_ldiskfs_map_nblocks(struct inode *inode, unsigned long block,
729 unsigned long num, unsigned long *blocks,
735 CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
736 block, block + num - 1, (unsigned) inode->i_ino);
740 bp.init_num = bp.num = num;
743 err = ldiskfs_ext_walk_space(inode, block, num,
744 ldiskfs_ext_new_extent_cb, &bp);
745 ldiskfs_ext_invalidate_cache(inode);
750 int osd_ldiskfs_map_ext_inode_pages(struct inode *inode, struct page **page,
751 int pages, unsigned long *blocks,
754 int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
756 struct page *fp = NULL;
759 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
760 inode->i_ino, pages, (*page)->index);
762 /* pages are sorted already. so, we just have to find
763 * contig. space and process them properly */
766 /* start new extent */
771 } else if (fp->index + clen == (*page)->index) {
772 /* continue the extent */
779 /* process found extent */
780 rc = osd_ldiskfs_map_nblocks(inode, fp->index * blocks_per_page,
781 clen * blocks_per_page, blocks,
786 /* look for next extent */
788 blocks += blocks_per_page * clen;
792 rc = osd_ldiskfs_map_nblocks(inode, fp->index * blocks_per_page,
793 clen * blocks_per_page, blocks,
799 int osd_ldiskfs_map_bm_inode_pages(struct inode *inode, struct page **page,
800 int pages, unsigned long *blocks,
803 int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
807 for (i = 0, b = blocks; i < pages; i++, page++) {
808 rc = ldiskfs_map_inode_page(inode, *page, b, create);
810 CERROR("ino %lu, blk %lu create %d: rc %d\n",
811 inode->i_ino, *b, create, rc);
815 b += blocks_per_page;
820 static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
821 int pages, unsigned long *blocks,
826 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
827 rc = osd_ldiskfs_map_ext_inode_pages(inode, page, pages,
831 rc = osd_ldiskfs_map_bm_inode_pages(inode, page, pages, blocks, create);
836 static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
837 struct niobuf_local *lnb, int npages)
839 struct osd_thread_info *oti = osd_oti_get(env);
840 struct osd_iobuf *iobuf = &oti->oti_iobuf;
841 struct inode *inode = osd_dt_obj(dt)->oo_inode;
842 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
843 struct timeval start;
845 unsigned long timediff;
854 rc = osd_init_iobuf(osd, iobuf, 0, npages);
855 if (unlikely(rc != 0))
858 isize = i_size_read(inode);
859 maxidx = ((isize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) - 1;
861 if (osd->od_writethrough_cache)
863 if (isize > osd->od_readcache_max_filesize)
866 do_gettimeofday(&start);
867 for (i = 0; i < npages; i++) {
870 generic_error_remove_page(inode->i_mapping,
874 * till commit the content of the page is undefined
875 * we'll set it uptodate once bulk is done. otherwise
876 * subsequent reads can access non-stable data
878 ClearPageUptodate(lnb[i].page);
880 if (lnb[i].len == PAGE_CACHE_SIZE)
883 if (maxidx >= lnb[i].page->index) {
884 osd_iobuf_add_page(iobuf, lnb[i].page);
887 char *p = kmap(lnb[i].page);
889 off = lnb[i].lnb_page_offset;
892 off = (lnb[i].lnb_page_offset + lnb[i].len) &
895 memset(p + off, 0, PAGE_CACHE_SIZE - off);
899 do_gettimeofday(&end);
900 timediff = cfs_timeval_sub(&end, &start, NULL);
901 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
903 if (iobuf->dr_npages) {
904 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
906 iobuf->dr_blocks, 0);
907 if (likely(rc == 0)) {
908 rc = osd_do_bio(osd, inode, iobuf);
909 /* do IO stats for preparation reads */
910 osd_fini_iobuf(osd, iobuf);
916 /* Check if a block is allocated or not */
917 static int osd_is_mapped(struct inode *inode, obd_size offset)
919 sector_t (*fs_bmap)(struct address_space *, sector_t);
921 fs_bmap = inode->i_mapping->a_ops->bmap;
923 /* We can't know if we are overwriting or not */
924 if (unlikely(fs_bmap == NULL))
927 if (i_size_read(inode) == 0)
930 /* Beyond EOF, must not be mapped */
931 if (((i_size_read(inode) - 1) >> inode->i_blkbits) <
932 (offset >> inode->i_blkbits))
935 if (fs_bmap(inode->i_mapping, offset >> inode->i_blkbits) == 0)
941 static int osd_declare_write_commit(const struct lu_env *env,
942 struct dt_object *dt,
943 struct niobuf_local *lnb, int npages,
944 struct thandle *handle)
946 const struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
947 struct inode *inode = osd_dt_obj(dt)->oo_inode;
948 struct osd_thandle *oh;
955 bool ignore_quota = false;
956 long long quota_space = 0;
959 LASSERT(handle != NULL);
960 oh = container_of0(handle, struct osd_thandle, ot_super);
961 LASSERT(oh->ot_handle == NULL);
965 /* calculate number of extents (probably better to pass nb) */
966 for (i = 0; i < npages; i++) {
967 if (i && lnb[i].lnb_file_offset !=
968 lnb[i - 1].lnb_file_offset + lnb[i - 1].len)
971 if (!osd_is_mapped(inode, lnb[i].lnb_file_offset))
972 quota_space += PAGE_CACHE_SIZE;
974 /* ignore quota for the whole request if any page is from
975 * client cache or written by root.
977 * XXX once we drop the 1.8 client support, the checking
978 * for whether page is from cache can be simplified as:
979 * !(lnb[i].flags & OBD_BRW_SYNC)
981 * XXX we could handle this on per-lnb basis as done by
983 if ((lnb[i].flags & OBD_BRW_NOQUOTA) ||
984 (lnb[i].flags & (OBD_BRW_FROM_GRANT | OBD_BRW_SYNC)) ==
990 * each extent can go into new leaf causing a split
991 * 5 is max tree depth: inode + 4 index blocks
992 * with blockmaps, depth is 3 at most
994 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
996 * many concurrent threads may grow tree by the time
997 * our transaction starts. so, consider 2 is a min depth
999 depth = ext_depth(inode);
1000 depth = max(depth, 1) + 1;
1002 oh->ot_credits++; /* inode */
1003 oh->ot_credits += depth * 2 * extents;
1007 oh->ot_credits++; /* inode */
1008 oh->ot_credits += depth * extents;
1011 /* quota space for metadata blocks */
1012 quota_space += depth * extents * LDISKFS_BLOCK_SIZE(osd_sb(osd));
1014 /* quota space should be reported in 1K blocks */
1015 quota_space = toqb(quota_space);
1017 /* each new block can go in different group (bitmap + gd) */
1019 /* we can't dirty more bitmap blocks than exist */
1020 if (newblocks > LDISKFS_SB(osd_sb(osd))->s_groups_count)
1021 oh->ot_credits += LDISKFS_SB(osd_sb(osd))->s_groups_count;
1023 oh->ot_credits += newblocks;
1025 /* we can't dirty more gd blocks than exist */
1026 if (newblocks > LDISKFS_SB(osd_sb(osd))->s_gdb_count)
1027 oh->ot_credits += LDISKFS_SB(osd_sb(osd))->s_gdb_count;
1029 oh->ot_credits += newblocks;
1031 /* make sure the over quota flags were not set */
1032 lnb[0].flags &= ~(OBD_BRW_OVER_USRQUOTA | OBD_BRW_OVER_GRPQUOTA);
1034 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1035 quota_space, oh, true, true, &flags,
1038 /* we need only to store the overquota flags in the first lnb for
1039 * now, once we support multiple objects BRW, this code needs be
1041 if (flags & QUOTA_FL_OVER_USRQUOTA)
1042 lnb[0].flags |= OBD_BRW_OVER_USRQUOTA;
1043 if (flags & QUOTA_FL_OVER_GRPQUOTA)
1044 lnb[0].flags |= OBD_BRW_OVER_GRPQUOTA;
1049 /* Check if a block is allocated or not */
1050 static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
1051 struct niobuf_local *lnb, int npages,
1052 struct thandle *thandle)
1054 struct osd_thread_info *oti = osd_oti_get(env);
1055 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1056 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1057 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1063 rc = osd_init_iobuf(osd, iobuf, 1, npages);
1064 if (unlikely(rc != 0))
1067 isize = i_size_read(inode);
1068 ll_vfs_dq_init(inode);
1070 for (i = 0; i < npages; i++) {
1071 if (lnb[i].rc == -ENOSPC &&
1072 osd_is_mapped(inode, lnb[i].lnb_file_offset)) {
1073 /* Allow the write to proceed if overwriting an
1078 if (lnb[i].rc) { /* ENOSPC, network RPC error, etc. */
1079 CDEBUG(D_INODE, "Skipping [%d] == %d\n", i,
1081 LASSERT(lnb[i].page);
1082 generic_error_remove_page(inode->i_mapping,lnb[i].page);
1086 LASSERT(PageLocked(lnb[i].page));
1087 LASSERT(!PageWriteback(lnb[i].page));
1089 if (lnb[i].lnb_file_offset + lnb[i].len > isize)
1090 isize = lnb[i].lnb_file_offset + lnb[i].len;
1093 * Since write and truncate are serialized by oo_sem, even
1094 * partial-page truncate should not leave dirty pages in the
1097 LASSERT(!PageDirty(lnb[i].page));
1099 SetPageUptodate(lnb[i].page);
1101 osd_iobuf_add_page(iobuf, lnb[i].page);
1104 if (OBD_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC)) {
1106 } else if (iobuf->dr_npages > 0) {
1107 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
1109 iobuf->dr_blocks, 1);
1111 /* no pages to write, no transno is needed */
1112 thandle->th_local = 1;
1115 if (likely(rc == 0)) {
1116 if (isize > i_size_read(inode)) {
1117 i_size_write(inode, isize);
1118 LDISKFS_I(inode)->i_disksize = isize;
1119 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1122 rc = osd_do_bio(osd, inode, iobuf);
1123 /* we don't do stats here as in read path because
1124 * write is async: we'll do this in osd_put_bufs() */
1126 osd_fini_iobuf(osd, iobuf);
1129 if (unlikely(rc != 0)) {
1130 /* if write fails, we should drop pages from the cache */
1131 for (i = 0; i < npages; i++) {
1132 if (lnb[i].page == NULL)
1134 LASSERT(PageLocked(lnb[i].page));
1135 generic_error_remove_page(inode->i_mapping,lnb[i].page);
1142 static int osd_read_prep(const struct lu_env *env, struct dt_object *dt,
1143 struct niobuf_local *lnb, int npages)
1145 struct osd_thread_info *oti = osd_oti_get(env);
1146 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1147 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1148 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1149 struct timeval start, end;
1150 unsigned long timediff;
1151 int rc = 0, i, m = 0, cache = 0;
1155 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1156 if (unlikely(rc != 0))
1159 if (osd->od_read_cache)
1161 if (i_size_read(inode) > osd->od_readcache_max_filesize)
1164 do_gettimeofday(&start);
1165 for (i = 0; i < npages; i++) {
1167 if (i_size_read(inode) <= lnb[i].lnb_file_offset)
1168 /* If there's no more data, abort early.
1169 * lnb->rc == 0, so it's easy to detect later. */
1172 if (i_size_read(inode) <
1173 lnb[i].lnb_file_offset + lnb[i].len - 1)
1174 lnb[i].rc = i_size_read(inode) - lnb[i].lnb_file_offset;
1176 lnb[i].rc = lnb[i].len;
1179 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_ACCESS, 1);
1180 if (PageUptodate(lnb[i].page)) {
1181 lprocfs_counter_add(osd->od_stats,
1182 LPROC_OSD_CACHE_HIT, 1);
1184 lprocfs_counter_add(osd->od_stats,
1185 LPROC_OSD_CACHE_MISS, 1);
1186 osd_iobuf_add_page(iobuf, lnb[i].page);
1189 generic_error_remove_page(inode->i_mapping,lnb[i].page);
1191 do_gettimeofday(&end);
1192 timediff = cfs_timeval_sub(&end, &start, NULL);
1193 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1195 if (iobuf->dr_npages) {
1196 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
1198 iobuf->dr_blocks, 0);
1199 rc = osd_do_bio(osd, inode, iobuf);
1201 /* IO stats will be done in osd_bufs_put() */
1208 * XXX: Another layering violation for now.
1210 * We don't want to use ->f_op->read methods, because generic file write
1212 * - serializes on ->i_sem, and
1214 * - does a lot of extra work like balance_dirty_pages(),
1216 * which doesn't work for globally shared files like /last_rcvd.
1218 static int osd_ldiskfs_readlink(struct inode *inode, char *buffer, int buflen)
1220 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
1222 memcpy(buffer, (char *)ei->i_data, buflen);
1227 int osd_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs)
1229 struct buffer_head *bh;
1230 unsigned long block;
1237 /* prevent reading after eof */
1238 spin_lock(&inode->i_lock);
1239 if (i_size_read(inode) < *offs + size) {
1240 loff_t diff = i_size_read(inode) - *offs;
1241 spin_unlock(&inode->i_lock);
1243 CDEBUG(D_EXT2, "size %llu is too short to read @%llu\n",
1244 i_size_read(inode), *offs);
1246 } else if (diff == 0) {
1252 spin_unlock(&inode->i_lock);
1255 blocksize = 1 << inode->i_blkbits;
1258 block = *offs >> inode->i_blkbits;
1259 boffs = *offs & (blocksize - 1);
1260 csize = min(blocksize - boffs, size);
1261 bh = ldiskfs_bread(NULL, inode, block, 0, &err);
1263 CERROR("%s: can't read %u@%llu on ino %lu: rc = %d\n",
1264 LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
1265 csize, *offs, inode->i_ino, err);
1269 memcpy(buf, bh->b_data + boffs, csize);
1279 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
1280 struct lu_buf *buf, loff_t *pos,
1281 struct lustre_capa *capa)
1283 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1286 if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
1289 /* Read small symlink from inode body as we need to maintain correct
1290 * on-disk symlinks for ldiskfs.
1292 if (S_ISLNK(dt->do_lu.lo_header->loh_attr) &&
1293 (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
1294 rc = osd_ldiskfs_readlink(inode, buf->lb_buf, buf->lb_len);
1296 rc = osd_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
1301 static inline int osd_extents_enabled(struct super_block *sb,
1302 struct inode *inode)
1304 if (inode != NULL) {
1305 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL)
1307 } else if (test_opt(sb, EXTENTS)) {
1313 static inline int osd_calc_bkmap_credits(struct super_block *sb,
1314 struct inode *inode,
1319 int credits, bits, bs, i;
1321 bits = sb->s_blocksize_bits;
1324 /* legacy blockmap: 3 levels * 3 (bitmap,gd,itself)
1325 * we do not expect blockmaps on the large files,
1326 * so let's shrink it to 2 levels (4GB files) */
1328 /* this is default reservation: 2 levels */
1329 credits = (blocks + 2) * 3;
1331 /* actual offset is unknown, hard to optimize */
1335 /* now check for few specific cases to optimize */
1336 if (pos + size <= LDISKFS_NDIR_BLOCKS * bs) {
1339 /* allocate if not allocated */
1340 if (inode == NULL) {
1341 credits += blocks * 2;
1344 for (i = (pos >> bits); i < (pos >> bits) + blocks; i++) {
1345 LASSERT(i < LDISKFS_NDIR_BLOCKS);
1346 if (LDISKFS_I(inode)->i_data[i] == 0)
1349 } else if (pos + size <= (LDISKFS_NDIR_BLOCKS + 1024) * bs) {
1350 /* single indirect */
1351 credits = blocks * 3;
1352 /* probably indirect block has been allocated already */
1353 if (!inode || LDISKFS_I(inode)->i_data[LDISKFS_IND_BLOCK])
1360 static ssize_t osd_declare_write(const struct lu_env *env, struct dt_object *dt,
1361 const struct lu_buf *buf, loff_t _pos,
1362 struct thandle *handle)
1364 struct osd_object *obj = osd_dt_obj(dt);
1365 struct inode *inode = obj->oo_inode;
1366 struct super_block *sb = osd_sb(osd_obj2dev(obj));
1367 struct osd_thandle *oh;
1368 int rc = 0, est = 0, credits, blocks, allocated = 0;
1374 LASSERT(buf != NULL);
1375 LASSERT(handle != NULL);
1377 oh = container_of0(handle, struct osd_thandle, ot_super);
1378 LASSERT(oh->ot_handle == NULL);
1381 bits = sb->s_blocksize_bits;
1385 /* if this is an append, then we
1386 * should expect cross-block record */
1392 /* blocks to modify */
1393 blocks = ((pos + size + bs - 1) >> bits) - (pos >> bits);
1394 LASSERT(blocks > 0);
1396 if (inode != NULL && _pos != -1) {
1397 /* object size in blocks */
1398 est = (i_size_read(inode) + bs - 1) >> bits;
1399 allocated = inode->i_blocks >> (bits - 9);
1400 if (pos + size <= i_size_read(inode) && est <= allocated) {
1401 /* looks like an overwrite, no need to modify tree */
1403 /* no need to modify i_size */
1408 if (osd_extents_enabled(sb, inode)) {
1410 * many concurrent threads may grow tree by the time
1411 * our transaction starts. so, consider 2 is a min depth
1412 * for every level we may need to allocate a new block
1413 * and take some entries from the old one. so, 3 blocks
1414 * to allocate (bitmap, gd, itself) + old block - 4 per
1417 depth = inode != NULL ? ext_depth(inode) : 0;
1418 depth = max(depth, 1) + 1;
1420 /* if not append, then split may need to modify
1421 * existing blocks moving entries into the new ones */
1424 /* blocks to store data: bitmap,gd,itself */
1425 credits += blocks * 3;
1427 credits = osd_calc_bkmap_credits(sb, inode, size, _pos, blocks);
1429 /* if inode is created as part of the transaction,
1430 * then it's counted already by the creation method */
1436 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
1438 /* dt_declare_write() is usually called for system objects, such
1439 * as llog or last_rcvd files. We needn't enforce quota on those
1440 * objects, so always set the lqi_space as 0. */
1442 rc = osd_declare_inode_qid(env, i_uid_read(inode),
1443 i_gid_read(inode), 0, oh, true,
1448 static int osd_ldiskfs_writelink(struct inode *inode, char *buffer, int buflen)
1450 /* LU-2634: clear the extent format for fast symlink */
1451 ldiskfs_clear_inode_flag(inode, LDISKFS_INODE_EXTENTS);
1453 memcpy((char *)&LDISKFS_I(inode)->i_data, (char *)buffer, buflen);
1454 LDISKFS_I(inode)->i_disksize = buflen;
1455 i_size_write(inode, buflen);
1456 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1461 int osd_ldiskfs_write_record(struct inode *inode, void *buf, int bufsize,
1462 int write_NUL, loff_t *offs, handle_t *handle)
1464 struct buffer_head *bh = NULL;
1465 loff_t offset = *offs;
1466 loff_t new_size = i_size_read(inode);
1467 unsigned long block;
1468 int blocksize = 1 << inode->i_blkbits;
1472 int dirty_inode = 0;
1476 * long symlink write does not count the NUL terminator in
1477 * bufsize, we write it, and the inode's file size does not
1478 * count the NUL terminator as well.
1480 ((char *)buf)[bufsize] = '\0';
1483 while (bufsize > 0) {
1487 block = offset >> inode->i_blkbits;
1488 boffs = offset & (blocksize - 1);
1489 size = min(blocksize - boffs, bufsize);
1490 bh = ldiskfs_bread(handle, inode, block, 1, &err);
1492 CERROR("%s: error reading offset %llu (block %lu): "
1494 inode->i_sb->s_id, offset, block, err);
1498 err = ldiskfs_journal_get_write_access(handle, bh);
1500 CERROR("journal_get_write_access() returned error %d\n",
1504 LASSERTF(boffs + size <= bh->b_size,
1505 "boffs %d size %d bh->b_size %lu",
1506 boffs, size, (unsigned long)bh->b_size);
1507 memcpy(bh->b_data + boffs, buf, size);
1508 err = ldiskfs_journal_dirty_metadata(handle, bh);
1512 if (offset + size > new_size)
1513 new_size = offset + size;
1523 /* correct in-core and on-disk sizes */
1524 if (new_size > i_size_read(inode)) {
1525 spin_lock(&inode->i_lock);
1526 if (new_size > i_size_read(inode))
1527 i_size_write(inode, new_size);
1528 if (i_size_read(inode) > LDISKFS_I(inode)->i_disksize) {
1529 LDISKFS_I(inode)->i_disksize = i_size_read(inode);
1532 spin_unlock(&inode->i_lock);
1534 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1542 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
1543 const struct lu_buf *buf, loff_t *pos,
1544 struct thandle *handle, struct lustre_capa *capa,
1547 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1548 struct osd_thandle *oh;
1552 LASSERT(dt_object_exists(dt));
1554 if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_WRITE))
1557 LASSERT(handle != NULL);
1558 LASSERT(inode != NULL);
1559 ll_vfs_dq_init(inode);
1561 /* XXX: don't check: one declared chunk can be used many times */
1562 /* osd_trans_exec_op(env, handle, OSD_OT_WRITE); */
1564 oh = container_of(handle, struct osd_thandle, ot_super);
1565 LASSERT(oh->ot_handle->h_transaction != NULL);
1566 /* Write small symlink to inode body as we need to maintain correct
1567 * on-disk symlinks for ldiskfs.
1568 * Note: the buf->lb_buf contains a NUL terminator while buf->lb_len
1569 * does not count it in.
1571 is_link = S_ISLNK(dt->do_lu.lo_header->loh_attr);
1572 if (is_link && (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
1573 result = osd_ldiskfs_writelink(inode, buf->lb_buf, buf->lb_len);
1575 result = osd_ldiskfs_write_record(inode, buf->lb_buf,
1576 buf->lb_len, is_link, pos,
1579 result = buf->lb_len;
1583 static int osd_declare_punch(const struct lu_env *env, struct dt_object *dt,
1584 __u64 start, __u64 end, struct thandle *th)
1586 struct osd_thandle *oh;
1587 struct inode *inode;
1592 oh = container_of(th, struct osd_thandle, ot_super);
1595 * we don't need to reserve credits for whole truncate
1596 * it's not possible as truncate may need to free too many
1597 * blocks and that won't fit a single transaction. instead
1598 * we reserve credits to change i_size and put inode onto
1599 * orphan list. if needed truncate will extend or restart
1602 osd_trans_declare_op(env, oh, OSD_OT_PUNCH,
1603 osd_dto_credits_noquota[DTO_ATTR_SET_BASE] + 3);
1605 inode = osd_dt_obj(dt)->oo_inode;
1608 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1609 0, oh, true, true, NULL, false);
1613 static int osd_punch(const struct lu_env *env, struct dt_object *dt,
1614 __u64 start, __u64 end, struct thandle *th,
1615 struct lustre_capa *capa)
1617 struct osd_thandle *oh;
1618 struct osd_object *obj = osd_dt_obj(dt);
1619 struct inode *inode = obj->oo_inode;
1622 int rc = 0, rc2 = 0;
1625 LASSERT(end == OBD_OBJECT_EOF);
1626 LASSERT(dt_object_exists(dt));
1627 LASSERT(osd_invariant(obj));
1628 LASSERT(inode != NULL);
1629 ll_vfs_dq_init(inode);
1632 oh = container_of(th, struct osd_thandle, ot_super);
1633 LASSERT(oh->ot_handle->h_transaction != NULL);
1635 osd_trans_exec_op(env, th, OSD_OT_PUNCH);
1637 tid = oh->ot_handle->h_transaction->t_tid;
1639 i_size_write(inode, start);
1640 ll_truncate_pagecache(inode, start);
1641 #ifdef HAVE_INODEOPS_TRUNCATE
1642 if (inode->i_op->truncate) {
1643 inode->i_op->truncate(inode);
1646 ldiskfs_truncate(inode);
1649 * For a partial-page truncate, flush the page to disk immediately to
1650 * avoid data corruption during direct disk write. b=17397
1652 if ((start & ~CFS_PAGE_MASK) != 0)
1653 rc = filemap_fdatawrite_range(inode->i_mapping, start, start+1);
1655 h = journal_current_handle();
1657 LASSERT(h == oh->ot_handle);
1659 if (tid != h->h_transaction->t_tid) {
1660 int credits = oh->ot_credits;
1662 * transaction has changed during truncate
1663 * we need to restart the handle with our credits
1665 if (h->h_buffer_credits < credits) {
1666 if (ldiskfs_journal_extend(h, credits))
1667 rc2 = ldiskfs_journal_restart(h, credits);
1671 RETURN(rc == 0 ? rc2 : rc);
1674 static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
1675 struct ll_user_fiemap *fm)
1677 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1678 struct osd_thread_info *info = osd_oti_get(env);
1679 struct dentry *dentry = &info->oti_obj_dentry;
1680 struct file *file = &info->oti_file;
1681 mm_segment_t saved_fs;
1685 dentry->d_inode = inode;
1686 dentry->d_sb = inode->i_sb;
1687 file->f_dentry = dentry;
1688 file->f_mapping = inode->i_mapping;
1689 file->f_op = inode->i_fop;
1690 set_file_inode(file, inode);
1692 saved_fs = get_fs();
1694 /* ldiskfs_ioctl does not have a inode argument */
1695 if (inode->i_fop->unlocked_ioctl)
1696 rc = inode->i_fop->unlocked_ioctl(file, FSFILT_IOC_FIEMAP,
1705 * in some cases we may need declare methods for objects being created
1706 * e.g., when we create symlink
1708 const struct dt_body_operations osd_body_ops_new = {
1709 .dbo_declare_write = osd_declare_write,
1712 const struct dt_body_operations osd_body_ops = {
1713 .dbo_read = osd_read,
1714 .dbo_declare_write = osd_declare_write,
1715 .dbo_write = osd_write,
1716 .dbo_bufs_get = osd_bufs_get,
1717 .dbo_bufs_put = osd_bufs_put,
1718 .dbo_write_prep = osd_write_prep,
1719 .dbo_declare_write_commit = osd_declare_write_commit,
1720 .dbo_write_commit = osd_write_commit,
1721 .dbo_read_prep = osd_read_prep,
1722 .dbo_declare_punch = osd_declare_punch,
1723 .dbo_punch = osd_punch,
1724 .dbo_fiemap_get = osd_fiemap_get,