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;
151 #ifdef HAVE_BVEC_ITER
152 struct bvec_iter iter;
159 /* CAVEAT EMPTOR: possibly in IRQ context
160 * DO NOT record procfs stats here!!! */
162 if (unlikely(iobuf == NULL)) {
163 CERROR("***** bio->bi_private is NULL! This should never "
164 "happen. Normally, I would crash here, but instead I "
165 "will dump the bio contents to the console. Please "
166 "report this to <https://jira.hpdd.intel.com/> , along "
167 "with any interesting messages leading up to this point "
168 "(like SCSI errors, perhaps). Because bi_private is "
169 "NULL, I can't wake up the thread that initiated this "
170 "IO - you will probably have to reboot this node.\n");
171 CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, "
172 "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, "
173 "bi_private: %p\n", bio->bi_next, bio->bi_flags,
174 bio->bi_rw, bio->bi_vcnt, bio_idx(bio),
175 bio_sectors(bio) << 9, bio->bi_end_io,
176 atomic_read(&bio->bi_cnt), bio->bi_private);
180 /* the check is outside of the cycle for performance reason -bzzz */
181 if (!test_bit(__REQ_WRITE, &bio->bi_rw)) {
182 bio_for_each_segment(bvl, bio, iter) {
183 if (likely(error == 0))
184 SetPageUptodate(bvec_iter_page(&bvl, iter));
185 LASSERT(PageLocked(bvec_iter_page(&bvl, iter)));
187 atomic_dec(&iobuf->dr_dev->od_r_in_flight);
189 atomic_dec(&iobuf->dr_dev->od_w_in_flight);
192 /* any real error is good enough -bzzz */
193 if (error != 0 && iobuf->dr_error == 0)
194 iobuf->dr_error = error;
197 * set dr_elapsed before dr_numreqs turns to 0, otherwise
198 * it's possible that service thread will see dr_numreqs
199 * is zero, but dr_elapsed is not set yet, leading to lost
200 * data in this processing and an assertion in a subsequent
203 if (atomic_read(&iobuf->dr_numreqs) == 1) {
204 iobuf->dr_elapsed = jiffies - iobuf->dr_start_time;
205 iobuf->dr_elapsed_valid = 1;
207 if (atomic_dec_and_test(&iobuf->dr_numreqs))
208 wake_up(&iobuf->dr_wait);
210 /* Completed bios used to be chained off iobuf->dr_bios and freed in
211 * filter_clear_dreq(). It was then possible to exhaust the biovec-256
212 * mempool when serious on-disk fragmentation was encountered,
213 * deadlocking the OST. The bios are now released as soon as complete
214 * so the pool cannot be exhausted while IOs are competing. bug 10076 */
218 static void record_start_io(struct osd_iobuf *iobuf, int size)
220 struct osd_device *osd = iobuf->dr_dev;
221 struct obd_histogram *h = osd->od_brw_stats.hist;
224 atomic_inc(&iobuf->dr_numreqs);
226 if (iobuf->dr_rw == 0) {
227 atomic_inc(&osd->od_r_in_flight);
228 lprocfs_oh_tally(&h[BRW_R_RPC_HIST],
229 atomic_read(&osd->od_r_in_flight));
230 lprocfs_oh_tally_log2(&h[BRW_R_DISK_IOSIZE], size);
231 } else if (iobuf->dr_rw == 1) {
232 atomic_inc(&osd->od_w_in_flight);
233 lprocfs_oh_tally(&h[BRW_W_RPC_HIST],
234 atomic_read(&osd->od_w_in_flight));
235 lprocfs_oh_tally_log2(&h[BRW_W_DISK_IOSIZE], size);
241 static void osd_submit_bio(int rw, struct bio *bio)
243 LASSERTF(rw == 0 || rw == 1, "%x\n", rw);
245 submit_bio(READ, bio);
247 submit_bio(WRITE, bio);
250 static int can_be_merged(struct bio *bio, sector_t sector)
255 return bio_end_sector(bio) == sector ? 1 : 0;
258 static int osd_do_bio(struct osd_device *osd, struct inode *inode,
259 struct osd_iobuf *iobuf)
261 int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
262 struct page **pages = iobuf->dr_pages;
263 int npages = iobuf->dr_npages;
264 unsigned long *blocks = iobuf->dr_blocks;
265 int total_blocks = npages * blocks_per_page;
266 int sector_bits = inode->i_sb->s_blocksize_bits - 9;
267 unsigned int blocksize = inode->i_sb->s_blocksize;
268 struct bio *bio = NULL;
270 unsigned int page_offset;
279 LASSERT(iobuf->dr_npages == npages);
281 osd_brw_stats_update(osd, iobuf);
282 iobuf->dr_start_time = cfs_time_current();
284 for (page_idx = 0, block_idx = 0;
286 page_idx++, block_idx += blocks_per_page) {
288 page = pages[page_idx];
289 LASSERT(block_idx + blocks_per_page <= total_blocks);
291 for (i = 0, page_offset = 0;
293 i += nblocks, page_offset += blocksize * nblocks) {
297 if (blocks[block_idx + i] == 0) { /* hole */
298 LASSERTF(iobuf->dr_rw == 0,
299 "page_idx %u, block_idx %u, i %u\n",
300 page_idx, block_idx, i);
301 memset(kmap(page) + page_offset, 0, blocksize);
306 sector = (sector_t)blocks[block_idx + i] << sector_bits;
308 /* Additional contiguous file blocks? */
309 while (i + nblocks < blocks_per_page &&
310 (sector + (nblocks << sector_bits)) ==
311 ((sector_t)blocks[block_idx + i + nblocks] <<
316 can_be_merged(bio, sector) &&
317 bio_add_page(bio, page,
318 blocksize * nblocks, page_offset) != 0)
319 continue; /* added this frag OK */
322 struct request_queue *q =
323 bdev_get_queue(bio->bi_bdev);
324 unsigned int bi_size = bio_sectors(bio) << 9;
326 /* Dang! I have to fragment this I/O */
327 CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) "
328 "sectors %d(%d) psg %d(%d) hsg %d(%d)\n",
329 bi_size, bio->bi_vcnt, bio->bi_max_vecs,
331 queue_max_sectors(q),
332 bio_phys_segments(q, bio),
333 queue_max_phys_segments(q),
334 0, queue_max_hw_segments(q));
335 record_start_io(iobuf, bi_size);
336 osd_submit_bio(iobuf->dr_rw, bio);
339 /* allocate new bio */
340 bio = bio_alloc(GFP_NOIO, min(BIO_MAX_PAGES,
341 (npages - page_idx) *
344 CERROR("Can't allocate bio %u*%u = %u pages\n",
345 (npages - page_idx), blocks_per_page,
346 (npages - page_idx) * blocks_per_page);
351 bio->bi_bdev = inode->i_sb->s_bdev;
352 bio_set_sector(bio, sector);
353 bio->bi_rw = (iobuf->dr_rw == 0) ? READ : WRITE;
354 bio->bi_end_io = dio_complete_routine;
355 bio->bi_private = iobuf;
357 rc = bio_add_page(bio, page,
358 blocksize * nblocks, page_offset);
364 record_start_io(iobuf, bio_sectors(bio) << 9);
365 osd_submit_bio(iobuf->dr_rw, bio);
370 /* in order to achieve better IO throughput, we don't wait for writes
371 * completion here. instead we proceed with transaction commit in
372 * parallel and wait for IO completion once transaction is stopped
373 * see osd_trans_stop() for more details -bzzz */
374 if (iobuf->dr_rw == 0) {
375 wait_event(iobuf->dr_wait,
376 atomic_read(&iobuf->dr_numreqs) == 0);
377 osd_fini_iobuf(osd, iobuf);
381 rc = iobuf->dr_error;
385 static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
386 struct niobuf_local *lnb)
393 int poff = offset & (PAGE_CACHE_SIZE - 1);
394 int plen = PAGE_CACHE_SIZE - poff;
398 lnb->lnb_file_offset = offset;
399 lnb->lnb_page_offset = poff;
401 /* lnb->lnb_flags = rnb->rnb_flags; */
403 lnb->lnb_page = NULL;
406 LASSERTF(plen <= len, "plen %u, len %lld\n", plen,
417 struct page *osd_get_page(struct dt_object *dt, loff_t offset, int rw)
419 struct inode *inode = osd_dt_obj(dt)->oo_inode;
420 struct osd_device *d = osd_obj2dev(osd_dt_obj(dt));
425 page = find_or_create_page(inode->i_mapping, offset >> PAGE_CACHE_SHIFT,
426 GFP_NOFS | __GFP_HIGHMEM);
427 if (unlikely(page == NULL))
428 lprocfs_counter_add(d->od_stats, LPROC_OSD_NO_PAGE, 1);
434 * there are following "locks":
451 int osd_bufs_get(const struct lu_env *env, struct dt_object *d, loff_t pos,
452 ssize_t len, struct niobuf_local *lnb, int rw,
453 struct lustre_capa *capa)
455 struct osd_object *obj = osd_dt_obj(d);
456 int npages, i, rc = 0;
458 LASSERT(obj->oo_inode);
460 osd_map_remote_to_local(pos, len, &npages, lnb);
462 for (i = 0; i < npages; i++, lnb++) {
463 lnb->lnb_page = osd_get_page(d, lnb->lnb_file_offset, rw);
464 if (lnb->lnb_page == NULL)
465 GOTO(cleanup, rc = -ENOMEM);
467 /* DLM locking protects us from write and truncate competing
468 * for same region, but truncate can leave dirty page in the
469 * cache. it's possible the writeout on a such a page is in
470 * progress when we access it. it's also possible that during
471 * this writeout we put new (partial) data, but then won't
472 * be able to proceed in filter_commitrw_write(). thus let's
473 * just wait for writeout completion, should be rare enough.
475 wait_on_page_writeback(lnb->lnb_page);
476 BUG_ON(PageWriteback(lnb->lnb_page));
478 lu_object_get(&d->do_lu);
486 static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
487 struct niobuf_local *lnb, int npages)
491 for (i = 0; i < npages; i++) {
492 if (lnb[i].lnb_page == NULL)
494 LASSERT(PageLocked(lnb[i].lnb_page));
495 unlock_page(lnb[i].lnb_page);
496 page_cache_release(lnb[i].lnb_page);
497 lu_object_put(env, &dt->do_lu);
498 lnb[i].lnb_page = NULL;
504 #ifndef HAVE_LDISKFS_MAP_BLOCKS
506 #ifdef HAVE_EXT_PBLOCK /* Name changed to ext4_ext_pblock for kernel 2.6.35 */
507 #define ldiskfs_ext_pblock(ex) ext_pblock((ex))
511 unsigned long *blocks;
518 static long ldiskfs_ext_find_goal(struct inode *inode,
519 struct ldiskfs_ext_path *path,
520 unsigned long block, int *aflags)
522 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
523 unsigned long bg_start;
524 unsigned long colour;
528 struct ldiskfs_extent *ex;
529 depth = path->p_depth;
531 /* try to predict block placement */
532 if ((ex = path[depth].p_ext))
533 return ldiskfs_ext_pblock(ex) +
534 (block - le32_to_cpu(ex->ee_block));
536 /* it looks index is empty
537 * try to find starting from index itself */
538 if (path[depth].p_bh)
539 return path[depth].p_bh->b_blocknr;
542 /* OK. use inode's group */
543 bg_start = (ei->i_block_group * LDISKFS_BLOCKS_PER_GROUP(inode->i_sb)) +
544 le32_to_cpu(LDISKFS_SB(inode->i_sb)->s_es->s_first_data_block);
545 colour = (current->pid % 16) *
546 (LDISKFS_BLOCKS_PER_GROUP(inode->i_sb) / 16);
547 return bg_start + colour + block;
550 static unsigned long new_blocks(handle_t *handle, struct inode *inode,
551 struct ldiskfs_ext_path *path,
552 unsigned long block, unsigned long *count,
555 struct ldiskfs_allocation_request ar;
556 unsigned long pblock;
559 /* find neighbour allocated blocks */
561 *err = ldiskfs_ext_search_left(inode, path, &ar.lleft, &ar.pleft);
565 *err = ldiskfs_ext_search_right(inode, path, &ar.lright, &ar.pright);
569 /* allocate new block */
570 ar.goal = ldiskfs_ext_find_goal(inode, path, block, &aflags);
574 ar.flags = LDISKFS_MB_HINT_DATA;
575 pblock = ldiskfs_mb_new_blocks(handle, &ar, err);
580 static int ldiskfs_ext_new_extent_cb(struct inode *inode,
581 struct ldiskfs_ext_path *path,
582 struct ldiskfs_ext_cache *cex,
583 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
584 struct ldiskfs_extent *ex,
588 struct bpointers *bp = cbdata;
589 struct ldiskfs_extent nex;
590 unsigned long pblock;
596 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
597 if (cex->ec_type == LDISKFS_EXT_CACHE_EXTENT) {
599 if ((cex->ec_len != 0) && (cex->ec_start != 0)) {
605 if (bp->create == 0) {
607 if (cex->ec_block < bp->start)
608 i = bp->start - cex->ec_block;
609 if (i >= cex->ec_len)
610 CERROR("nothing to do?! i = %d, e_num = %u\n",
612 for (; i < cex->ec_len && bp->num; i++) {
622 tgen = LDISKFS_I(inode)->i_ext_generation;
623 count = ldiskfs_ext_calc_credits_for_insert(inode, path);
625 handle = osd_journal_start(inode, LDISKFS_HT_MISC,
626 count + LDISKFS_ALLOC_NEEDED + 1);
627 if (IS_ERR(handle)) {
628 return PTR_ERR(handle);
631 if (tgen != LDISKFS_I(inode)->i_ext_generation) {
632 /* the tree has changed. so path can be invalid at moment */
633 ldiskfs_journal_stop(handle);
637 /* In 2.6.32 kernel, ldiskfs_ext_walk_space()'s callback func is not
638 * protected by i_data_sem as whole. so we patch it to store
639 * generation to path and now verify the tree hasn't changed */
640 down_write((&LDISKFS_I(inode)->i_data_sem));
642 /* validate extent, make sure the extent tree does not changed */
643 if (LDISKFS_I(inode)->i_ext_generation != path[0].p_generation) {
644 /* cex is invalid, try again */
645 up_write(&LDISKFS_I(inode)->i_data_sem);
646 ldiskfs_journal_stop(handle);
651 pblock = new_blocks(handle, inode, path, cex->ec_block, &count, &err);
654 BUG_ON(count > cex->ec_len);
656 /* insert new extent */
657 nex.ee_block = cpu_to_le32(cex->ec_block);
658 ldiskfs_ext_store_pblock(&nex, pblock);
659 nex.ee_len = cpu_to_le16(count);
660 err = ldiskfs_ext_insert_extent(handle, inode, path, &nex, 0);
662 /* free data blocks we just allocated */
663 /* not a good idea to call discard here directly,
664 * but otherwise we'd need to call it every free() */
665 ldiskfs_discard_preallocations(inode);
666 #ifdef HAVE_EXT_FREE_BLOCK_WITH_BUFFER_HEAD /* Introduced in 2.6.32-rc7 */
667 ldiskfs_free_blocks(handle, inode, NULL,
668 ldiskfs_ext_pblock(&nex),
669 le16_to_cpu(nex.ee_len), 0);
671 ldiskfs_free_blocks(handle, inode, ldiskfs_ext_pblock(&nex),
672 le16_to_cpu(nex.ee_len), 0);
678 * Putting len of the actual extent we just inserted,
679 * we are asking ldiskfs_ext_walk_space() to continue
680 * scaning after that block
682 cex->ec_len = le16_to_cpu(nex.ee_len);
683 cex->ec_start = ldiskfs_ext_pblock(&nex);
684 BUG_ON(le16_to_cpu(nex.ee_len) == 0);
685 BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
688 up_write((&LDISKFS_I(inode)->i_data_sem));
689 ldiskfs_journal_stop(handle);
694 CERROR("hmm. why do we find this extent?\n");
695 CERROR("initial space: %lu:%u\n",
696 bp->start, bp->init_num);
697 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
698 CERROR("current extent: %u/%u/%llu %d\n",
699 cex->ec_block, cex->ec_len,
700 (unsigned long long)cex->ec_start,
703 CERROR("current extent: %u/%u/%llu\n",
704 cex->ec_block, cex->ec_len,
705 (unsigned long long)cex->ec_start);
709 if (cex->ec_block < bp->start)
710 i = bp->start - cex->ec_block;
711 if (i >= cex->ec_len)
712 CERROR("nothing to do?! i = %d, e_num = %u\n",
714 for (; i < cex->ec_len && bp->num; i++) {
715 *(bp->blocks) = cex->ec_start + i;
716 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
717 if (cex->ec_type != LDISKFS_EXT_CACHE_EXTENT) {
719 if ((cex->ec_len == 0) || (cex->ec_start == 0)) {
721 /* unmap any possible underlying metadata from
722 * the block device mapping. bug 6998. */
723 unmap_underlying_metadata(inode->i_sb->s_bdev,
734 int osd_ldiskfs_map_nblocks(struct inode *inode, unsigned long block,
735 unsigned long num, unsigned long *blocks,
741 CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
742 block, block + num - 1, (unsigned) inode->i_ino);
746 bp.init_num = bp.num = num;
749 err = ldiskfs_ext_walk_space(inode, block, num,
750 ldiskfs_ext_new_extent_cb, &bp);
751 ldiskfs_ext_invalidate_cache(inode);
756 int osd_ldiskfs_map_bm_inode_pages(struct inode *inode, struct page **page,
757 int pages, unsigned long *blocks,
760 int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
764 for (i = 0, b = blocks; i < pages; i++, page++) {
765 rc = ldiskfs_map_inode_page(inode, *page, b, create);
767 CERROR("ino %lu, blk %lu create %d: rc %d\n",
768 inode->i_ino, *b, create, rc);
771 b += blocks_per_page;
776 int osd_ldiskfs_map_ext_inode_pages(struct inode *inode, struct page **page,
777 int pages, unsigned long *blocks,
780 int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
782 struct page *fp = NULL;
785 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
786 inode->i_ino, pages, (*page)->index);
788 /* pages are sorted already. so, we just have to find
789 * contig. space and process them properly */
792 /* start new extent */
797 } else if (fp->index + clen == (*page)->index) {
798 /* continue the extent */
805 /* process found extent */
806 rc = osd_ldiskfs_map_nblocks(inode, fp->index * blocks_per_page,
807 clen * blocks_per_page, blocks,
812 /* look for next extent */
814 blocks += blocks_per_page * clen;
818 rc = osd_ldiskfs_map_nblocks(inode, fp->index * blocks_per_page,
819 clen * blocks_per_page, blocks,
825 static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
826 int pages, unsigned long *blocks,
831 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
832 rc = osd_ldiskfs_map_ext_inode_pages(inode, page, pages,
836 rc = osd_ldiskfs_map_bm_inode_pages(inode, page, pages, blocks, create);
841 static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
842 int pages, unsigned long *blocks,
845 int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
847 struct page *fp = NULL;
850 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
851 inode->i_ino, pages, (*page)->index);
853 /* pages are sorted already. so, we just have to find
854 * contig. space and process them properly */
856 long blen, total = 0;
857 handle_t *handle = NULL;
858 struct ldiskfs_map_blocks map = { 0 };
860 if (fp == NULL) { /* start new extent */
865 } else if (fp->index + clen == (*page)->index) {
866 /* continue the extent */
872 /* process found extent */
873 map.m_lblk = fp->index * blocks_per_page;
874 map.m_len = blen = clen * blocks_per_page;
876 create = LDISKFS_GET_BLOCKS_CREATE;
877 handle = ldiskfs_journal_current_handle();
878 LASSERT(handle != NULL);
881 rc = ldiskfs_map_blocks(handle, inode, &map, create);
884 for (; total < blen && c < map.m_len; c++, total++) {
886 *(blocks + total) = 0;
890 *(blocks + total) = map.m_pblk + c;
891 /* unmap any possible underlying
892 * metadata from the block device
893 * mapping. bug 6998. */
894 if ((map.m_flags & LDISKFS_MAP_NEW) &&
896 unmap_underlying_metadata(
903 if (rc == 0 && total < blen) {
904 map.m_lblk = fp->index * blocks_per_page + total;
905 map.m_len = blen - total;
911 /* look for next extent */
913 blocks += blocks_per_page * clen;
918 #endif /* HAVE_LDISKFS_MAP_BLOCKS */
920 static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
921 struct niobuf_local *lnb, int npages)
923 struct osd_thread_info *oti = osd_oti_get(env);
924 struct osd_iobuf *iobuf = &oti->oti_iobuf;
925 struct inode *inode = osd_dt_obj(dt)->oo_inode;
926 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
927 struct timeval start;
929 unsigned long timediff;
938 rc = osd_init_iobuf(osd, iobuf, 0, npages);
939 if (unlikely(rc != 0))
942 isize = i_size_read(inode);
943 maxidx = ((isize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) - 1;
945 if (osd->od_writethrough_cache)
947 if (isize > osd->od_readcache_max_filesize)
950 do_gettimeofday(&start);
951 for (i = 0; i < npages; i++) {
954 generic_error_remove_page(inode->i_mapping,
958 * till commit the content of the page is undefined
959 * we'll set it uptodate once bulk is done. otherwise
960 * subsequent reads can access non-stable data
962 ClearPageUptodate(lnb[i].lnb_page);
964 if (lnb[i].lnb_len == PAGE_CACHE_SIZE)
967 if (maxidx >= lnb[i].lnb_page->index) {
968 osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
971 char *p = kmap(lnb[i].lnb_page);
973 off = lnb[i].lnb_page_offset;
976 off = (lnb[i].lnb_page_offset + lnb[i].lnb_len) &
979 memset(p + off, 0, PAGE_CACHE_SIZE - off);
980 kunmap(lnb[i].lnb_page);
983 do_gettimeofday(&end);
984 timediff = cfs_timeval_sub(&end, &start, NULL);
985 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
987 if (iobuf->dr_npages) {
988 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
990 iobuf->dr_blocks, 0);
991 if (likely(rc == 0)) {
992 rc = osd_do_bio(osd, inode, iobuf);
993 /* do IO stats for preparation reads */
994 osd_fini_iobuf(osd, iobuf);
1000 /* Check if a block is allocated or not */
1001 static int osd_is_mapped(struct inode *inode, obd_size offset)
1003 sector_t (*fs_bmap)(struct address_space *, sector_t);
1005 fs_bmap = inode->i_mapping->a_ops->bmap;
1007 /* We can't know if we are overwriting or not */
1008 if (unlikely(fs_bmap == NULL))
1011 if (i_size_read(inode) == 0)
1014 /* Beyond EOF, must not be mapped */
1015 if (((i_size_read(inode) - 1) >> inode->i_blkbits) <
1016 (offset >> inode->i_blkbits))
1019 if (fs_bmap(inode->i_mapping, offset >> inode->i_blkbits) == 0)
1025 static int osd_declare_write_commit(const struct lu_env *env,
1026 struct dt_object *dt,
1027 struct niobuf_local *lnb, int npages,
1028 struct thandle *handle)
1030 const struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1031 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1032 struct osd_thandle *oh;
1039 bool ignore_quota = false;
1040 long long quota_space = 0;
1043 LASSERT(handle != NULL);
1044 oh = container_of0(handle, struct osd_thandle, ot_super);
1045 LASSERT(oh->ot_handle == NULL);
1049 /* calculate number of extents (probably better to pass nb) */
1050 for (i = 0; i < npages; i++) {
1051 if (i && lnb[i].lnb_file_offset !=
1052 lnb[i - 1].lnb_file_offset + lnb[i - 1].lnb_len)
1055 if (!osd_is_mapped(inode, lnb[i].lnb_file_offset))
1056 quota_space += PAGE_CACHE_SIZE;
1058 /* ignore quota for the whole request if any page is from
1059 * client cache or written by root.
1061 * XXX once we drop the 1.8 client support, the checking
1062 * for whether page is from cache can be simplified as:
1063 * !(lnb[i].flags & OBD_BRW_SYNC)
1065 * XXX we could handle this on per-lnb basis as done by
1067 if ((lnb[i].lnb_flags & OBD_BRW_NOQUOTA) ||
1068 (lnb[i].lnb_flags & (OBD_BRW_FROM_GRANT | OBD_BRW_SYNC)) ==
1070 ignore_quota = true;
1074 * each extent can go into new leaf causing a split
1075 * 5 is max tree depth: inode + 4 index blocks
1076 * with blockmaps, depth is 3 at most
1078 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
1080 * many concurrent threads may grow tree by the time
1081 * our transaction starts. so, consider 2 is a min depth
1083 depth = ext_depth(inode);
1084 depth = max(depth, 1) + 1;
1086 oh->ot_credits++; /* inode */
1087 oh->ot_credits += depth * 2 * extents;
1091 oh->ot_credits++; /* inode */
1092 oh->ot_credits += depth * extents;
1095 /* quota space for metadata blocks */
1096 quota_space += depth * extents * LDISKFS_BLOCK_SIZE(osd_sb(osd));
1098 /* quota space should be reported in 1K blocks */
1099 quota_space = toqb(quota_space);
1101 /* each new block can go in different group (bitmap + gd) */
1103 /* we can't dirty more bitmap blocks than exist */
1104 if (newblocks > LDISKFS_SB(osd_sb(osd))->s_groups_count)
1105 oh->ot_credits += LDISKFS_SB(osd_sb(osd))->s_groups_count;
1107 oh->ot_credits += newblocks;
1109 /* we can't dirty more gd blocks than exist */
1110 if (newblocks > LDISKFS_SB(osd_sb(osd))->s_gdb_count)
1111 oh->ot_credits += LDISKFS_SB(osd_sb(osd))->s_gdb_count;
1113 oh->ot_credits += newblocks;
1115 /* make sure the over quota flags were not set */
1116 lnb[0].lnb_flags &= ~(OBD_BRW_OVER_USRQUOTA | OBD_BRW_OVER_GRPQUOTA);
1118 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1119 quota_space, oh, true, true, &flags,
1122 /* we need only to store the overquota flags in the first lnb for
1123 * now, once we support multiple objects BRW, this code needs be
1125 if (flags & QUOTA_FL_OVER_USRQUOTA)
1126 lnb[0].lnb_flags |= OBD_BRW_OVER_USRQUOTA;
1127 if (flags & QUOTA_FL_OVER_GRPQUOTA)
1128 lnb[0].lnb_flags |= OBD_BRW_OVER_GRPQUOTA;
1133 /* Check if a block is allocated or not */
1134 static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
1135 struct niobuf_local *lnb, int npages,
1136 struct thandle *thandle)
1138 struct osd_thread_info *oti = osd_oti_get(env);
1139 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1140 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1141 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1147 rc = osd_init_iobuf(osd, iobuf, 1, npages);
1148 if (unlikely(rc != 0))
1151 isize = i_size_read(inode);
1152 ll_vfs_dq_init(inode);
1154 for (i = 0; i < npages; i++) {
1155 if (lnb[i].lnb_rc == -ENOSPC &&
1156 osd_is_mapped(inode, lnb[i].lnb_file_offset)) {
1157 /* Allow the write to proceed if overwriting an
1162 if (lnb[i].lnb_rc) { /* ENOSPC, network RPC error, etc. */
1163 CDEBUG(D_INODE, "Skipping [%d] == %d\n", i,
1165 LASSERT(lnb[i].lnb_page);
1166 generic_error_remove_page(inode->i_mapping,
1171 LASSERT(PageLocked(lnb[i].lnb_page));
1172 LASSERT(!PageWriteback(lnb[i].lnb_page));
1174 if (lnb[i].lnb_file_offset + lnb[i].lnb_len > isize)
1175 isize = lnb[i].lnb_file_offset + lnb[i].lnb_len;
1178 * Since write and truncate are serialized by oo_sem, even
1179 * partial-page truncate should not leave dirty pages in the
1182 LASSERT(!PageDirty(lnb[i].lnb_page));
1184 SetPageUptodate(lnb[i].lnb_page);
1186 osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
1189 if (OBD_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC)) {
1191 } else if (iobuf->dr_npages > 0) {
1192 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
1194 iobuf->dr_blocks, 1);
1196 /* no pages to write, no transno is needed */
1197 thandle->th_local = 1;
1200 if (likely(rc == 0)) {
1201 if (isize > i_size_read(inode)) {
1202 i_size_write(inode, isize);
1203 LDISKFS_I(inode)->i_disksize = isize;
1204 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1207 rc = osd_do_bio(osd, inode, iobuf);
1208 /* we don't do stats here as in read path because
1209 * write is async: we'll do this in osd_put_bufs() */
1211 osd_fini_iobuf(osd, iobuf);
1214 if (unlikely(rc != 0)) {
1215 /* if write fails, we should drop pages from the cache */
1216 for (i = 0; i < npages; i++) {
1217 if (lnb[i].lnb_page == NULL)
1219 LASSERT(PageLocked(lnb[i].lnb_page));
1220 generic_error_remove_page(inode->i_mapping,
1228 static int osd_read_prep(const struct lu_env *env, struct dt_object *dt,
1229 struct niobuf_local *lnb, int npages)
1231 struct osd_thread_info *oti = osd_oti_get(env);
1232 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1233 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1234 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1235 struct timeval start, end;
1236 unsigned long timediff;
1237 int rc = 0, i, m = 0, cache = 0, cache_hits = 0, cache_misses = 0;
1241 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1242 if (unlikely(rc != 0))
1245 if (osd->od_read_cache)
1247 if (i_size_read(inode) > osd->od_readcache_max_filesize)
1250 do_gettimeofday(&start);
1251 for (i = 0; i < npages; i++) {
1253 if (i_size_read(inode) <= lnb[i].lnb_file_offset)
1254 /* If there's no more data, abort early.
1255 * lnb->lnb_rc == 0, so it's easy to detect later. */
1258 if (i_size_read(inode) <
1259 lnb[i].lnb_file_offset + lnb[i].lnb_len - 1)
1260 lnb[i].lnb_rc = i_size_read(inode) -
1261 lnb[i].lnb_file_offset;
1263 lnb[i].lnb_rc = lnb[i].lnb_len;
1264 m += lnb[i].lnb_len;
1266 if (PageUptodate(lnb[i].lnb_page)) {
1270 osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
1274 generic_error_remove_page(inode->i_mapping,
1277 do_gettimeofday(&end);
1278 timediff = cfs_timeval_sub(&end, &start, NULL);
1279 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1281 if (cache_hits != 0)
1282 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_HIT,
1284 if (cache_misses != 0)
1285 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_MISS,
1287 if (cache_hits + cache_misses != 0)
1288 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
1289 cache_hits + cache_misses);
1291 if (iobuf->dr_npages) {
1292 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
1294 iobuf->dr_blocks, 0);
1295 rc = osd_do_bio(osd, inode, iobuf);
1297 /* IO stats will be done in osd_bufs_put() */
1304 * XXX: Another layering violation for now.
1306 * We don't want to use ->f_op->read methods, because generic file write
1308 * - serializes on ->i_sem, and
1310 * - does a lot of extra work like balance_dirty_pages(),
1312 * which doesn't work for globally shared files like /last_rcvd.
1314 static int osd_ldiskfs_readlink(struct inode *inode, char *buffer, int buflen)
1316 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
1318 memcpy(buffer, (char *)ei->i_data, buflen);
1323 int osd_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs)
1325 struct buffer_head *bh;
1326 unsigned long block;
1333 /* prevent reading after eof */
1334 spin_lock(&inode->i_lock);
1335 if (i_size_read(inode) < *offs + size) {
1336 loff_t diff = i_size_read(inode) - *offs;
1337 spin_unlock(&inode->i_lock);
1339 CDEBUG(D_EXT2, "size %llu is too short to read @%llu\n",
1340 i_size_read(inode), *offs);
1342 } else if (diff == 0) {
1348 spin_unlock(&inode->i_lock);
1351 blocksize = 1 << inode->i_blkbits;
1354 block = *offs >> inode->i_blkbits;
1355 boffs = *offs & (blocksize - 1);
1356 csize = min(blocksize - boffs, size);
1357 bh = ldiskfs_bread(NULL, inode, block, 0, &err);
1359 CERROR("%s: can't read %u@%llu on ino %lu: rc = %d\n",
1360 LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
1361 csize, *offs, inode->i_ino, err);
1365 memcpy(buf, bh->b_data + boffs, csize);
1375 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
1376 struct lu_buf *buf, loff_t *pos,
1377 struct lustre_capa *capa)
1379 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1382 if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
1385 /* Read small symlink from inode body as we need to maintain correct
1386 * on-disk symlinks for ldiskfs.
1388 if (S_ISLNK(dt->do_lu.lo_header->loh_attr) &&
1389 (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
1390 rc = osd_ldiskfs_readlink(inode, buf->lb_buf, buf->lb_len);
1392 rc = osd_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
1397 static inline int osd_extents_enabled(struct super_block *sb,
1398 struct inode *inode)
1400 if (inode != NULL) {
1401 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL)
1403 } else if (test_opt(sb, EXTENTS)) {
1409 static inline int osd_calc_bkmap_credits(struct super_block *sb,
1410 struct inode *inode,
1415 int credits, bits, bs, i;
1417 bits = sb->s_blocksize_bits;
1420 /* legacy blockmap: 3 levels * 3 (bitmap,gd,itself)
1421 * we do not expect blockmaps on the large files,
1422 * so let's shrink it to 2 levels (4GB files) */
1424 /* this is default reservation: 2 levels */
1425 credits = (blocks + 2) * 3;
1427 /* actual offset is unknown, hard to optimize */
1431 /* now check for few specific cases to optimize */
1432 if (pos + size <= LDISKFS_NDIR_BLOCKS * bs) {
1435 /* allocate if not allocated */
1436 if (inode == NULL) {
1437 credits += blocks * 2;
1440 for (i = (pos >> bits); i < (pos >> bits) + blocks; i++) {
1441 LASSERT(i < LDISKFS_NDIR_BLOCKS);
1442 if (LDISKFS_I(inode)->i_data[i] == 0)
1445 } else if (pos + size <= (LDISKFS_NDIR_BLOCKS + 1024) * bs) {
1446 /* single indirect */
1447 credits = blocks * 3;
1448 /* probably indirect block has been allocated already */
1449 if (!inode || LDISKFS_I(inode)->i_data[LDISKFS_IND_BLOCK])
1456 static ssize_t osd_declare_write(const struct lu_env *env, struct dt_object *dt,
1457 const struct lu_buf *buf, loff_t _pos,
1458 struct thandle *handle)
1460 struct osd_object *obj = osd_dt_obj(dt);
1461 struct inode *inode = obj->oo_inode;
1462 struct super_block *sb = osd_sb(osd_obj2dev(obj));
1463 struct osd_thandle *oh;
1464 int rc = 0, est = 0, credits, blocks, allocated = 0;
1470 LASSERT(buf != NULL);
1471 LASSERT(handle != NULL);
1473 oh = container_of0(handle, struct osd_thandle, ot_super);
1474 LASSERT(oh->ot_handle == NULL);
1477 bits = sb->s_blocksize_bits;
1481 /* if this is an append, then we
1482 * should expect cross-block record */
1488 /* blocks to modify */
1489 blocks = ((pos + size + bs - 1) >> bits) - (pos >> bits);
1490 LASSERT(blocks > 0);
1492 if (inode != NULL && _pos != -1) {
1493 /* object size in blocks */
1494 est = (i_size_read(inode) + bs - 1) >> bits;
1495 allocated = inode->i_blocks >> (bits - 9);
1496 if (pos + size <= i_size_read(inode) && est <= allocated) {
1497 /* looks like an overwrite, no need to modify tree */
1499 /* no need to modify i_size */
1504 if (osd_extents_enabled(sb, inode)) {
1506 * many concurrent threads may grow tree by the time
1507 * our transaction starts. so, consider 2 is a min depth
1508 * for every level we may need to allocate a new block
1509 * and take some entries from the old one. so, 3 blocks
1510 * to allocate (bitmap, gd, itself) + old block - 4 per
1513 depth = inode != NULL ? ext_depth(inode) : 0;
1514 depth = max(depth, 1) + 1;
1516 /* if not append, then split may need to modify
1517 * existing blocks moving entries into the new ones */
1520 /* blocks to store data: bitmap,gd,itself */
1521 credits += blocks * 3;
1523 credits = osd_calc_bkmap_credits(sb, inode, size, _pos, blocks);
1525 /* if inode is created as part of the transaction,
1526 * then it's counted already by the creation method */
1532 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
1534 /* dt_declare_write() is usually called for system objects, such
1535 * as llog or last_rcvd files. We needn't enforce quota on those
1536 * objects, so always set the lqi_space as 0. */
1538 rc = osd_declare_inode_qid(env, i_uid_read(inode),
1539 i_gid_read(inode), 0, oh, true,
1544 static int osd_ldiskfs_writelink(struct inode *inode, char *buffer, int buflen)
1546 /* LU-2634: clear the extent format for fast symlink */
1547 ldiskfs_clear_inode_flag(inode, LDISKFS_INODE_EXTENTS);
1549 memcpy((char *)&LDISKFS_I(inode)->i_data, (char *)buffer, buflen);
1550 LDISKFS_I(inode)->i_disksize = buflen;
1551 i_size_write(inode, buflen);
1552 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1557 int osd_ldiskfs_write_record(struct inode *inode, void *buf, int bufsize,
1558 int write_NUL, loff_t *offs, handle_t *handle)
1560 struct buffer_head *bh = NULL;
1561 loff_t offset = *offs;
1562 loff_t new_size = i_size_read(inode);
1563 unsigned long block;
1564 int blocksize = 1 << inode->i_blkbits;
1568 int dirty_inode = 0;
1572 * long symlink write does not count the NUL terminator in
1573 * bufsize, we write it, and the inode's file size does not
1574 * count the NUL terminator as well.
1576 ((char *)buf)[bufsize] = '\0';
1579 while (bufsize > 0) {
1583 block = offset >> inode->i_blkbits;
1584 boffs = offset & (blocksize - 1);
1585 size = min(blocksize - boffs, bufsize);
1586 bh = ldiskfs_bread(handle, inode, block, 1, &err);
1588 CERROR("%s: error reading offset %llu (block %lu): "
1590 inode->i_sb->s_id, offset, block, err);
1594 err = ldiskfs_journal_get_write_access(handle, bh);
1596 CERROR("journal_get_write_access() returned error %d\n",
1600 LASSERTF(boffs + size <= bh->b_size,
1601 "boffs %d size %d bh->b_size %lu\n",
1602 boffs, size, (unsigned long)bh->b_size);
1603 memcpy(bh->b_data + boffs, buf, size);
1604 err = ldiskfs_journal_dirty_metadata(handle, bh);
1608 if (offset + size > new_size)
1609 new_size = offset + size;
1619 /* correct in-core and on-disk sizes */
1620 if (new_size > i_size_read(inode)) {
1621 spin_lock(&inode->i_lock);
1622 if (new_size > i_size_read(inode))
1623 i_size_write(inode, new_size);
1624 if (i_size_read(inode) > LDISKFS_I(inode)->i_disksize) {
1625 LDISKFS_I(inode)->i_disksize = i_size_read(inode);
1628 spin_unlock(&inode->i_lock);
1630 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1638 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
1639 const struct lu_buf *buf, loff_t *pos,
1640 struct thandle *handle, struct lustre_capa *capa,
1643 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1644 struct osd_thandle *oh;
1648 LASSERT(dt_object_exists(dt));
1650 if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_WRITE))
1653 LASSERT(handle != NULL);
1654 LASSERT(inode != NULL);
1655 ll_vfs_dq_init(inode);
1657 /* XXX: don't check: one declared chunk can be used many times */
1658 /* osd_trans_exec_op(env, handle, OSD_OT_WRITE); */
1660 oh = container_of(handle, struct osd_thandle, ot_super);
1661 LASSERT(oh->ot_handle->h_transaction != NULL);
1662 /* Write small symlink to inode body as we need to maintain correct
1663 * on-disk symlinks for ldiskfs.
1664 * Note: the buf->lb_buf contains a NUL terminator while buf->lb_len
1665 * does not count it in.
1667 is_link = S_ISLNK(dt->do_lu.lo_header->loh_attr);
1668 if (is_link && (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
1669 result = osd_ldiskfs_writelink(inode, buf->lb_buf, buf->lb_len);
1671 result = osd_ldiskfs_write_record(inode, buf->lb_buf,
1672 buf->lb_len, is_link, pos,
1675 result = buf->lb_len;
1679 static int osd_declare_punch(const struct lu_env *env, struct dt_object *dt,
1680 __u64 start, __u64 end, struct thandle *th)
1682 struct osd_thandle *oh;
1683 struct inode *inode;
1688 oh = container_of(th, struct osd_thandle, ot_super);
1691 * we don't need to reserve credits for whole truncate
1692 * it's not possible as truncate may need to free too many
1693 * blocks and that won't fit a single transaction. instead
1694 * we reserve credits to change i_size and put inode onto
1695 * orphan list. if needed truncate will extend or restart
1698 osd_trans_declare_op(env, oh, OSD_OT_PUNCH,
1699 osd_dto_credits_noquota[DTO_ATTR_SET_BASE] + 3);
1701 inode = osd_dt_obj(dt)->oo_inode;
1704 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1705 0, oh, true, true, NULL, false);
1709 static int osd_punch(const struct lu_env *env, struct dt_object *dt,
1710 __u64 start, __u64 end, struct thandle *th,
1711 struct lustre_capa *capa)
1713 struct osd_thandle *oh;
1714 struct osd_object *obj = osd_dt_obj(dt);
1715 struct inode *inode = obj->oo_inode;
1718 int rc = 0, rc2 = 0;
1721 LASSERT(end == OBD_OBJECT_EOF);
1722 LASSERT(dt_object_exists(dt));
1723 LASSERT(osd_invariant(obj));
1724 LASSERT(inode != NULL);
1725 ll_vfs_dq_init(inode);
1728 oh = container_of(th, struct osd_thandle, ot_super);
1729 LASSERT(oh->ot_handle->h_transaction != NULL);
1731 osd_trans_exec_op(env, th, OSD_OT_PUNCH);
1733 tid = oh->ot_handle->h_transaction->t_tid;
1735 i_size_write(inode, start);
1736 ll_truncate_pagecache(inode, start);
1737 #ifdef HAVE_INODEOPS_TRUNCATE
1738 if (inode->i_op->truncate) {
1739 inode->i_op->truncate(inode);
1742 ldiskfs_truncate(inode);
1745 * For a partial-page truncate, flush the page to disk immediately to
1746 * avoid data corruption during direct disk write. b=17397
1748 if ((start & ~CFS_PAGE_MASK) != 0)
1749 rc = filemap_fdatawrite_range(inode->i_mapping, start, start+1);
1751 h = journal_current_handle();
1753 LASSERT(h == oh->ot_handle);
1755 if (tid != h->h_transaction->t_tid) {
1756 int credits = oh->ot_credits;
1758 * transaction has changed during truncate
1759 * we need to restart the handle with our credits
1761 if (h->h_buffer_credits < credits) {
1762 if (ldiskfs_journal_extend(h, credits))
1763 rc2 = ldiskfs_journal_restart(h, credits);
1767 RETURN(rc == 0 ? rc2 : rc);
1770 static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
1771 struct ll_user_fiemap *fm)
1773 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1774 struct osd_thread_info *info = osd_oti_get(env);
1775 struct dentry *dentry = &info->oti_obj_dentry;
1776 struct file *file = &info->oti_file;
1777 mm_segment_t saved_fs;
1781 dentry->d_inode = inode;
1782 dentry->d_sb = inode->i_sb;
1783 file->f_dentry = dentry;
1784 file->f_mapping = inode->i_mapping;
1785 file->f_op = inode->i_fop;
1786 set_file_inode(file, inode);
1788 saved_fs = get_fs();
1790 /* ldiskfs_ioctl does not have a inode argument */
1791 if (inode->i_fop->unlocked_ioctl)
1792 rc = inode->i_fop->unlocked_ioctl(file, FSFILT_IOC_FIEMAP,
1801 * in some cases we may need declare methods for objects being created
1802 * e.g., when we create symlink
1804 const struct dt_body_operations osd_body_ops_new = {
1805 .dbo_declare_write = osd_declare_write,
1808 const struct dt_body_operations osd_body_ops = {
1809 .dbo_read = osd_read,
1810 .dbo_declare_write = osd_declare_write,
1811 .dbo_write = osd_write,
1812 .dbo_bufs_get = osd_bufs_get,
1813 .dbo_bufs_put = osd_bufs_put,
1814 .dbo_write_prep = osd_write_prep,
1815 .dbo_declare_write_commit = osd_declare_write_commit,
1816 .dbo_write_commit = osd_write_commit,
1817 .dbo_read_prep = osd_read_prep,
1818 .dbo_declare_punch = osd_declare_punch,
1819 .dbo_punch = osd_punch,
1820 .dbo_fiemap_get = osd_fiemap_get,