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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Author: Nikita Danilov <nikita@clusterfs.com>
37 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
41 /* LUSTRE_VERSION_CODE */
42 #include <lustre_ver.h>
43 /* prerequisite for linux/xattr.h */
44 #include <linux/types.h>
45 /* prerequisite for linux/xattr.h */
49 * struct OBD_{ALLOC,FREE}*()
52 #include <obd_support.h>
54 #include "osd_internal.h"
57 #include <ldiskfs/ldiskfs_extents.h>
59 static int __osd_init_iobuf(struct osd_device *d, struct osd_iobuf *iobuf,
60 int rw, int line, int pages)
64 LASSERTF(iobuf->dr_elapsed_valid == 0,
65 "iobuf %p, reqs %d, rw %d, line %d\n", iobuf,
66 atomic_read(&iobuf->dr_numreqs), iobuf->dr_rw,
68 LASSERT(pages <= PTLRPC_MAX_BRW_PAGES);
70 init_waitqueue_head(&iobuf->dr_wait);
71 atomic_set(&iobuf->dr_numreqs, 0);
76 iobuf->dr_elapsed = 0;
77 /* must be counted before, so assert */
79 iobuf->dr_init_at = line;
81 blocks = pages * (PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
82 if (iobuf->dr_bl_buf.lb_len >= blocks * sizeof(iobuf->dr_blocks[0])) {
83 LASSERT(iobuf->dr_pg_buf.lb_len >=
84 pages * sizeof(iobuf->dr_pages[0]));
88 /* start with 1MB for 4K blocks */
90 while (i <= PTLRPC_MAX_BRW_PAGES && i < pages)
93 CDEBUG(D_OTHER, "realloc %u for %u (%u) pages\n",
94 (unsigned)(pages * sizeof(iobuf->dr_pages[0])), i, pages);
96 blocks = pages * (PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
97 iobuf->dr_max_pages = 0;
98 CDEBUG(D_OTHER, "realloc %u for %u blocks\n",
99 (unsigned)(blocks * sizeof(iobuf->dr_blocks[0])), blocks);
101 lu_buf_realloc(&iobuf->dr_bl_buf, blocks * sizeof(iobuf->dr_blocks[0]));
102 iobuf->dr_blocks = iobuf->dr_bl_buf.lb_buf;
103 if (unlikely(iobuf->dr_blocks == NULL))
106 lu_buf_realloc(&iobuf->dr_pg_buf, pages * sizeof(iobuf->dr_pages[0]));
107 iobuf->dr_pages = iobuf->dr_pg_buf.lb_buf;
108 if (unlikely(iobuf->dr_pages == NULL))
111 iobuf->dr_max_pages = pages;
115 #define osd_init_iobuf(dev, iobuf, rw, pages) \
116 __osd_init_iobuf(dev, iobuf, rw, __LINE__, pages)
118 static void osd_iobuf_add_page(struct osd_iobuf *iobuf, struct page *page)
120 LASSERT(iobuf->dr_npages < iobuf->dr_max_pages);
121 iobuf->dr_pages[iobuf->dr_npages++] = page;
124 void osd_fini_iobuf(struct osd_device *d, struct osd_iobuf *iobuf)
126 int rw = iobuf->dr_rw;
128 if (iobuf->dr_elapsed_valid) {
129 iobuf->dr_elapsed_valid = 0;
130 LASSERT(iobuf->dr_dev == d);
131 LASSERT(iobuf->dr_frags > 0);
132 lprocfs_oh_tally(&d->od_brw_stats.
133 hist[BRW_R_DIO_FRAGS+rw],
135 lprocfs_oh_tally_log2(&d->od_brw_stats.hist[BRW_R_IO_TIME+rw],
140 #ifdef HAVE_BIO_ENDIO_USES_ONE_ARG
141 static void dio_complete_routine(struct bio *bio)
143 int error = bio->bi_error;
145 static void dio_complete_routine(struct bio *bio, int error)
148 struct osd_iobuf *iobuf = bio->bi_private;
152 /* CAVEAT EMPTOR: possibly in IRQ context
153 * DO NOT record procfs stats here!!! */
155 if (unlikely(iobuf == NULL)) {
156 CERROR("***** bio->bi_private is NULL! This should never "
157 "happen. Normally, I would crash here, but instead I "
158 "will dump the bio contents to the console. Please "
159 "report this to <https://jira.hpdd.intel.com/> , along "
160 "with any interesting messages leading up to this point "
161 "(like SCSI errors, perhaps). Because bi_private is "
162 "NULL, I can't wake up the thread that initiated this "
163 "IO - you will probably have to reboot this node.\n");
164 CERROR("bi_next: %p, bi_flags: %lx, "
170 "bi_vcnt: %d, bi_idx: %d, bi->size: %d, bi_end_io: %p,"
171 "bi_cnt: %d, bi_private: %p\n", bio->bi_next,
172 (unsigned long)bio->bi_flags,
178 bio->bi_vcnt, bio_idx(bio),
179 bio_sectors(bio) << 9, bio->bi_end_io,
181 atomic_read(&bio->bi_cnt),
183 atomic_read(&bio->__bi_cnt),
189 /* the check is outside of the cycle for performance reason -bzzz */
190 if (!bio_data_dir(bio)) {
191 bio_for_each_segment_all(bvl, bio, iter) {
192 if (likely(error == 0))
193 SetPageUptodate(bvl_to_page(bvl));
194 LASSERT(PageLocked(bvl_to_page(bvl)));
196 atomic_dec(&iobuf->dr_dev->od_r_in_flight);
198 atomic_dec(&iobuf->dr_dev->od_w_in_flight);
201 /* any real error is good enough -bzzz */
202 if (error != 0 && iobuf->dr_error == 0)
203 iobuf->dr_error = error;
206 * set dr_elapsed before dr_numreqs turns to 0, otherwise
207 * it's possible that service thread will see dr_numreqs
208 * is zero, but dr_elapsed is not set yet, leading to lost
209 * data in this processing and an assertion in a subsequent
212 if (atomic_read(&iobuf->dr_numreqs) == 1) {
213 iobuf->dr_elapsed = jiffies - iobuf->dr_start_time;
214 iobuf->dr_elapsed_valid = 1;
216 if (atomic_dec_and_test(&iobuf->dr_numreqs))
217 wake_up(&iobuf->dr_wait);
219 /* Completed bios used to be chained off iobuf->dr_bios and freed in
220 * filter_clear_dreq(). It was then possible to exhaust the biovec-256
221 * mempool when serious on-disk fragmentation was encountered,
222 * deadlocking the OST. The bios are now released as soon as complete
223 * so the pool cannot be exhausted while IOs are competing. bug 10076 */
227 static void record_start_io(struct osd_iobuf *iobuf, int size)
229 struct osd_device *osd = iobuf->dr_dev;
230 struct obd_histogram *h = osd->od_brw_stats.hist;
233 atomic_inc(&iobuf->dr_numreqs);
235 if (iobuf->dr_rw == 0) {
236 atomic_inc(&osd->od_r_in_flight);
237 lprocfs_oh_tally(&h[BRW_R_RPC_HIST],
238 atomic_read(&osd->od_r_in_flight));
239 lprocfs_oh_tally_log2(&h[BRW_R_DISK_IOSIZE], size);
240 } else if (iobuf->dr_rw == 1) {
241 atomic_inc(&osd->od_w_in_flight);
242 lprocfs_oh_tally(&h[BRW_W_RPC_HIST],
243 atomic_read(&osd->od_w_in_flight));
244 lprocfs_oh_tally_log2(&h[BRW_W_DISK_IOSIZE], size);
250 static void osd_submit_bio(int rw, struct bio *bio)
252 LASSERTF(rw == 0 || rw == 1, "%x\n", rw);
253 #ifdef HAVE_SUBMIT_BIO_2ARGS
255 submit_bio(READ, bio);
257 submit_bio(WRITE, bio);
264 static int can_be_merged(struct bio *bio, sector_t sector)
269 return bio_end_sector(bio) == sector ? 1 : 0;
272 static int osd_do_bio(struct osd_device *osd, struct inode *inode,
273 struct osd_iobuf *iobuf)
275 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
276 struct page **pages = iobuf->dr_pages;
277 int npages = iobuf->dr_npages;
278 sector_t *blocks = iobuf->dr_blocks;
279 int total_blocks = npages * blocks_per_page;
280 int sector_bits = inode->i_sb->s_blocksize_bits - 9;
281 unsigned int blocksize = inode->i_sb->s_blocksize;
282 struct bio *bio = NULL;
284 unsigned int page_offset;
294 LASSERT(iobuf->dr_npages == npages);
296 osd_brw_stats_update(osd, iobuf);
297 iobuf->dr_start_time = cfs_time_current();
299 blk_start_plug(&plug);
300 for (page_idx = 0, block_idx = 0;
302 page_idx++, block_idx += blocks_per_page) {
304 page = pages[page_idx];
305 LASSERT(block_idx + blocks_per_page <= total_blocks);
307 for (i = 0, page_offset = 0;
309 i += nblocks, page_offset += blocksize * nblocks) {
313 if (blocks[block_idx + i] == 0) { /* hole */
314 LASSERTF(iobuf->dr_rw == 0,
315 "page_idx %u, block_idx %u, i %u\n",
316 page_idx, block_idx, i);
317 memset(kmap(page) + page_offset, 0, blocksize);
322 sector = (sector_t)blocks[block_idx + i] << sector_bits;
324 /* Additional contiguous file blocks? */
325 while (i + nblocks < blocks_per_page &&
326 (sector + (nblocks << sector_bits)) ==
327 ((sector_t)blocks[block_idx + i + nblocks] <<
332 can_be_merged(bio, sector) &&
333 bio_add_page(bio, page,
334 blocksize * nblocks, page_offset) != 0)
335 continue; /* added this frag OK */
338 struct request_queue *q =
339 bdev_get_queue(bio->bi_bdev);
340 unsigned int bi_size = bio_sectors(bio) << 9;
342 /* Dang! I have to fragment this I/O */
343 CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) "
344 "sectors %d(%d) psg %d(%d) hsg %d(%d)\n",
345 bi_size, bio->bi_vcnt, bio->bi_max_vecs,
347 queue_max_sectors(q),
348 bio_phys_segments(q, bio),
349 queue_max_phys_segments(q),
350 0, queue_max_hw_segments(q));
351 record_start_io(iobuf, bi_size);
352 osd_submit_bio(iobuf->dr_rw, bio);
355 /* allocate new bio */
356 bio = bio_alloc(GFP_NOIO, min(BIO_MAX_PAGES,
357 (npages - page_idx) *
360 CERROR("Can't allocate bio %u*%u = %u pages\n",
361 (npages - page_idx), blocks_per_page,
362 (npages - page_idx) * blocks_per_page);
367 bio->bi_bdev = inode->i_sb->s_bdev;
368 bio_set_sector(bio, sector);
370 bio->bi_rw = (iobuf->dr_rw == 0) ? READ : WRITE;
372 bio->bi_opf = (iobuf->dr_rw == 0) ? READ : WRITE;
374 bio->bi_end_io = dio_complete_routine;
375 bio->bi_private = iobuf;
377 rc = bio_add_page(bio, page,
378 blocksize * nblocks, page_offset);
384 record_start_io(iobuf, bio_sectors(bio) << 9);
385 osd_submit_bio(iobuf->dr_rw, bio);
390 blk_finish_plug(&plug);
392 /* in order to achieve better IO throughput, we don't wait for writes
393 * completion here. instead we proceed with transaction commit in
394 * parallel and wait for IO completion once transaction is stopped
395 * see osd_trans_stop() for more details -bzzz */
396 if (iobuf->dr_rw == 0) {
397 wait_event(iobuf->dr_wait,
398 atomic_read(&iobuf->dr_numreqs) == 0);
399 osd_fini_iobuf(osd, iobuf);
403 rc = iobuf->dr_error;
407 static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
408 struct niobuf_local *lnb)
415 int poff = offset & (PAGE_SIZE - 1);
416 int plen = PAGE_SIZE - poff;
420 lnb->lnb_file_offset = offset;
421 lnb->lnb_page_offset = poff;
423 /* lnb->lnb_flags = rnb->rnb_flags; */
425 lnb->lnb_page = NULL;
428 LASSERTF(plen <= len, "plen %u, len %lld\n", plen,
439 static struct page *osd_get_page(struct dt_object *dt, loff_t offset,
442 struct inode *inode = osd_dt_obj(dt)->oo_inode;
443 struct osd_device *d = osd_obj2dev(osd_dt_obj(dt));
448 page = find_or_create_page(inode->i_mapping, offset >> PAGE_SHIFT,
451 if (unlikely(page == NULL))
452 lprocfs_counter_add(d->od_stats, LPROC_OSD_NO_PAGE, 1);
458 * there are following "locks":
469 * - lock pages, unlock
471 * - lock partial page
477 * Unlock and release pages loaded by osd_bufs_get()
479 * Unlock \a npages pages from \a lnb and drop the refcount on them.
481 * \param env thread execution environment
482 * \param dt dt object undergoing IO (OSD object + methods)
483 * \param lnb array of pages undergoing IO
484 * \param npages number of pages in \a lnb
488 static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
489 struct niobuf_local *lnb, int npages)
493 for (i = 0; i < npages; i++) {
494 if (lnb[i].lnb_page == NULL)
496 LASSERT(PageLocked(lnb[i].lnb_page));
497 unlock_page(lnb[i].lnb_page);
498 put_page(lnb[i].lnb_page);
499 dt_object_put(env, dt);
500 lnb[i].lnb_page = NULL;
507 * Load and lock pages undergoing IO
509 * Pages as described in the \a lnb array are fetched (from disk or cache)
510 * and locked for IO by the caller.
512 * DLM locking protects us from write and truncate competing for same region,
513 * but partial-page truncate can leave dirty pages in the cache for ldiskfs.
514 * It's possible the writeout on a such a page is in progress when we access
515 * it. It's also possible that during this writeout we put new (partial) data
516 * into the page, but won't be able to proceed in filter_commitrw_write().
517 * Therefore, just wait for writeout completion as it should be rare enough.
519 * \param env thread execution environment
520 * \param dt dt object undergoing IO (OSD object + methods)
521 * \param pos byte offset of IO start
522 * \param len number of bytes of IO
523 * \param lnb array of extents undergoing IO
524 * \param rw read or write operation, and other flags
525 * \param capa capabilities
527 * \retval pages (zero or more) loaded successfully
528 * \retval -ENOMEM on memory/page allocation error
530 static int osd_bufs_get(const struct lu_env *env, struct dt_object *dt,
531 loff_t pos, ssize_t len, struct niobuf_local *lnb,
532 enum dt_bufs_type rw)
534 struct osd_object *obj = osd_dt_obj(dt);
535 int npages, i, rc = 0;
538 LASSERT(obj->oo_inode);
540 osd_map_remote_to_local(pos, len, &npages, lnb);
542 /* this could also try less hard for DT_BUFS_TYPE_READAHEAD pages */
543 gfp_mask = rw & DT_BUFS_TYPE_LOCAL ? (GFP_NOFS | __GFP_HIGHMEM) :
545 for (i = 0; i < npages; i++, lnb++) {
546 lnb->lnb_page = osd_get_page(dt, lnb->lnb_file_offset,
548 if (lnb->lnb_page == NULL)
549 GOTO(cleanup, rc = -ENOMEM);
551 wait_on_page_writeback(lnb->lnb_page);
552 BUG_ON(PageWriteback(lnb->lnb_page));
554 lu_object_get(&dt->do_lu);
561 osd_bufs_put(env, dt, lnb - i, i);
565 #ifndef HAVE_LDISKFS_MAP_BLOCKS
567 #ifdef HAVE_EXT_PBLOCK /* Name changed to ext4_ext_pblock for kernel 2.6.35 */
568 #define ldiskfs_ext_pblock(ex) ext_pblock((ex))
579 static long ldiskfs_ext_find_goal(struct inode *inode,
580 struct ldiskfs_ext_path *path,
581 unsigned long block, int *aflags)
583 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
584 unsigned long bg_start;
585 unsigned long colour;
589 struct ldiskfs_extent *ex;
590 depth = path->p_depth;
592 /* try to predict block placement */
593 if ((ex = path[depth].p_ext))
594 return ldiskfs_ext_pblock(ex) +
595 (block - le32_to_cpu(ex->ee_block));
597 /* it looks index is empty
598 * try to find starting from index itself */
599 if (path[depth].p_bh)
600 return path[depth].p_bh->b_blocknr;
603 /* OK. use inode's group */
604 bg_start = (ei->i_block_group * LDISKFS_BLOCKS_PER_GROUP(inode->i_sb)) +
605 le32_to_cpu(LDISKFS_SB(inode->i_sb)->s_es->s_first_data_block);
606 colour = (current->pid % 16) *
607 (LDISKFS_BLOCKS_PER_GROUP(inode->i_sb) / 16);
608 return bg_start + colour + block;
611 static unsigned long new_blocks(handle_t *handle, struct inode *inode,
612 struct ldiskfs_ext_path *path,
613 unsigned long block, unsigned long *count,
616 struct ldiskfs_allocation_request ar;
617 unsigned long pblock;
620 /* find neighbour allocated blocks */
622 *err = ldiskfs_ext_search_left(inode, path, &ar.lleft, &ar.pleft);
626 *err = ldiskfs_ext_search_right(inode, path, &ar.lright, &ar.pright);
630 /* allocate new block */
631 ar.goal = ldiskfs_ext_find_goal(inode, path, block, &aflags);
635 ar.flags = LDISKFS_MB_HINT_DATA;
636 pblock = ldiskfs_mb_new_blocks(handle, &ar, err);
641 static int ldiskfs_ext_new_extent_cb(struct inode *inode,
642 struct ldiskfs_ext_path *path,
643 struct ldiskfs_ext_cache *cex,
644 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
645 struct ldiskfs_extent *ex,
649 struct bpointers *bp = cbdata;
650 struct ldiskfs_extent nex;
651 unsigned long pblock = 0;
657 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
658 if (cex->ec_type == LDISKFS_EXT_CACHE_EXTENT) {
660 if ((cex->ec_len != 0) && (cex->ec_start != 0)) {
666 if (bp->create == 0) {
668 if (cex->ec_block < bp->start)
669 i = bp->start - cex->ec_block;
670 if (i >= cex->ec_len)
671 CERROR("nothing to do?! i = %d, e_num = %u\n",
673 for (; i < cex->ec_len && bp->num; i++) {
683 tgen = LDISKFS_I(inode)->i_ext_generation;
684 count = ldiskfs_ext_calc_credits_for_insert(inode, path);
686 handle = osd_journal_start(inode, LDISKFS_HT_MISC,
687 count + LDISKFS_ALLOC_NEEDED + 1);
688 if (IS_ERR(handle)) {
689 return PTR_ERR(handle);
692 if (tgen != LDISKFS_I(inode)->i_ext_generation) {
693 /* the tree has changed. so path can be invalid at moment */
694 ldiskfs_journal_stop(handle);
698 /* In 2.6.32 kernel, ldiskfs_ext_walk_space()'s callback func is not
699 * protected by i_data_sem as whole. so we patch it to store
700 * generation to path and now verify the tree hasn't changed */
701 down_write((&LDISKFS_I(inode)->i_data_sem));
703 /* validate extent, make sure the extent tree does not changed */
704 if (LDISKFS_I(inode)->i_ext_generation != path[0].p_generation) {
705 /* cex is invalid, try again */
706 up_write(&LDISKFS_I(inode)->i_data_sem);
707 ldiskfs_journal_stop(handle);
712 pblock = new_blocks(handle, inode, path, cex->ec_block, &count, &err);
715 BUG_ON(count > cex->ec_len);
717 /* insert new extent */
718 nex.ee_block = cpu_to_le32(cex->ec_block);
719 ldiskfs_ext_store_pblock(&nex, pblock);
720 nex.ee_len = cpu_to_le16(count);
721 err = ldiskfs_ext_insert_extent(handle, inode, path, &nex, 0);
723 /* free data blocks we just allocated */
724 /* not a good idea to call discard here directly,
725 * but otherwise we'd need to call it every free() */
726 ldiskfs_discard_preallocations(inode);
727 #ifdef HAVE_EXT_FREE_BLOCK_WITH_BUFFER_HEAD /* Introduced in 2.6.32-rc7 */
728 ldiskfs_free_blocks(handle, inode, NULL,
729 ldiskfs_ext_pblock(&nex),
730 le16_to_cpu(nex.ee_len), 0);
732 ldiskfs_free_blocks(handle, inode, ldiskfs_ext_pblock(&nex),
733 le16_to_cpu(nex.ee_len), 0);
739 * Putting len of the actual extent we just inserted,
740 * we are asking ldiskfs_ext_walk_space() to continue
741 * scaning after that block
743 cex->ec_len = le16_to_cpu(nex.ee_len);
744 cex->ec_start = ldiskfs_ext_pblock(&nex);
745 BUG_ON(le16_to_cpu(nex.ee_len) == 0);
746 BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
749 up_write((&LDISKFS_I(inode)->i_data_sem));
750 ldiskfs_journal_stop(handle);
755 CERROR("hmm. why do we find this extent?\n");
756 CERROR("initial space: %lu:%u\n",
757 bp->start, bp->init_num);
758 #ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
759 CERROR("current extent: %u/%u/%llu %d\n",
760 cex->ec_block, cex->ec_len,
761 (unsigned long long)cex->ec_start,
764 CERROR("current extent: %u/%u/%llu\n",
765 cex->ec_block, cex->ec_len,
766 (unsigned long long)cex->ec_start);
770 if (cex->ec_block < bp->start)
771 i = bp->start - cex->ec_block;
772 if (i >= cex->ec_len)
773 CERROR("nothing to do?! i = %d, e_num = %u\n",
775 for (; i < cex->ec_len && bp->num; i++) {
776 *(bp->blocks) = cex->ec_start + i;
778 /* unmap any possible underlying metadata from
779 * the block device mapping. bug 6998. */
780 #ifndef HAVE_CLEAN_BDEV_ALIASES
781 unmap_underlying_metadata(inode->i_sb->s_bdev,
784 clean_bdev_aliases(inode->i_sb->s_bdev,
796 static int osd_ldiskfs_map_nblocks(struct inode *inode, unsigned long index,
797 int clen, sector_t *blocks, int create)
799 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
803 if (index + clen >= inode->i_sb->s_maxbytes >> PAGE_SHIFT)
807 bp.start = index * blocks_per_page;
808 bp.init_num = bp.num = clen * blocks_per_page;
811 CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
812 bp.start, bp.start + bp.num - 1, (unsigned)inode->i_ino);
814 err = ldiskfs_ext_walk_space(inode, bp.start, bp.num,
815 ldiskfs_ext_new_extent_cb, &bp);
816 ldiskfs_ext_invalidate_cache(inode);
821 static int osd_ldiskfs_map_bm_inode_pages(struct inode *inode,
822 struct page **page, int pages,
823 sector_t *blocks, int create)
825 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
826 pgoff_t bitmap_max_page_index;
830 bitmap_max_page_index = LDISKFS_SB(inode->i_sb)->s_bitmap_maxbytes >>
832 for (i = 0, b = blocks; i < pages; i++, page++) {
833 if ((*page)->index + 1 >= bitmap_max_page_index) {
837 rc = ldiskfs_map_inode_page(inode, *page, b, create);
839 CERROR("ino %lu, blk %llu create %d: rc %d\n",
841 (unsigned long long)*b, create, rc);
844 b += blocks_per_page;
849 static int osd_ldiskfs_map_ext_inode_pages(struct inode *inode,
851 int pages, sector_t *blocks,
854 int rc = 0, i = 0, clen = 0;
855 struct page *fp = NULL;
857 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
858 inode->i_ino, pages, (*page)->index);
860 /* pages are sorted already. so, we just have to find
861 * contig. space and process them properly */
864 /* start new extent */
869 } else if (fp->index + clen == (*page)->index) {
870 /* continue the extent */
877 /* process found extent */
878 rc = osd_ldiskfs_map_nblocks(inode, fp->index, clen,
883 /* look for next extent */
885 blocks += clen * (PAGE_SIZE >> inode->i_blkbits);
889 rc = osd_ldiskfs_map_nblocks(inode, fp->index, clen,
896 static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
897 int pages, sector_t *blocks,
902 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
903 rc = osd_ldiskfs_map_ext_inode_pages(inode, page, pages,
907 rc = osd_ldiskfs_map_bm_inode_pages(inode, page, pages, blocks, create);
912 static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
913 int pages, sector_t *blocks,
916 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
918 struct page *fp = NULL;
920 pgoff_t max_page_index;
921 handle_t *handle = NULL;
923 max_page_index = inode->i_sb->s_maxbytes >> PAGE_SHIFT;
925 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
926 inode->i_ino, pages, (*page)->index);
929 create = LDISKFS_GET_BLOCKS_CREATE;
930 handle = ldiskfs_journal_current_handle();
931 LASSERT(handle != NULL);
932 rc = osd_attach_jinode(inode);
936 /* pages are sorted already. so, we just have to find
937 * contig. space and process them properly */
939 long blen, total = 0;
940 struct ldiskfs_map_blocks map = { 0 };
942 if (fp == NULL) { /* start new extent */
947 } else if (fp->index + clen == (*page)->index) {
948 /* continue the extent */
954 if (fp->index + clen >= max_page_index)
955 GOTO(cleanup, rc = -EFBIG);
956 /* process found extent */
957 map.m_lblk = fp->index * blocks_per_page;
958 map.m_len = blen = clen * blocks_per_page;
960 rc = ldiskfs_map_blocks(handle, inode, &map, create);
963 for (; total < blen && c < map.m_len; c++, total++) {
965 *(blocks + total) = 0;
969 *(blocks + total) = map.m_pblk + c;
970 /* unmap any possible underlying
971 * metadata from the block device
972 * mapping. bug 6998. */
973 if ((map.m_flags & LDISKFS_MAP_NEW) &&
975 #ifndef HAVE_CLEAN_BDEV_ALIASES
976 unmap_underlying_metadata(
988 if (rc == 0 && total < blen) {
989 map.m_lblk = fp->index * blocks_per_page + total;
990 map.m_len = blen - total;
996 /* look for next extent */
998 blocks += blocks_per_page * clen;
1003 #endif /* HAVE_LDISKFS_MAP_BLOCKS */
1005 static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
1006 struct niobuf_local *lnb, int npages)
1008 struct osd_thread_info *oti = osd_oti_get(env);
1009 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1010 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1011 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1023 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1024 if (unlikely(rc != 0))
1027 isize = i_size_read(inode);
1028 maxidx = ((isize + PAGE_SIZE - 1) >> PAGE_SHIFT) - 1;
1030 if (osd->od_writethrough_cache)
1032 if (isize > osd->od_readcache_max_filesize)
1035 start = ktime_get();
1036 for (i = 0; i < npages; i++) {
1039 generic_error_remove_page(inode->i_mapping,
1043 * till commit the content of the page is undefined
1044 * we'll set it uptodate once bulk is done. otherwise
1045 * subsequent reads can access non-stable data
1047 ClearPageUptodate(lnb[i].lnb_page);
1049 if (lnb[i].lnb_len == PAGE_SIZE)
1052 if (maxidx >= lnb[i].lnb_page->index) {
1053 osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
1056 char *p = kmap(lnb[i].lnb_page);
1058 off = lnb[i].lnb_page_offset;
1061 off = (lnb[i].lnb_page_offset + lnb[i].lnb_len) &
1064 memset(p + off, 0, PAGE_SIZE - off);
1065 kunmap(lnb[i].lnb_page);
1069 timediff = ktime_us_delta(end, start);
1070 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1072 if (iobuf->dr_npages) {
1073 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
1075 iobuf->dr_blocks, 0);
1076 if (likely(rc == 0)) {
1077 rc = osd_do_bio(osd, inode, iobuf);
1078 /* do IO stats for preparation reads */
1079 osd_fini_iobuf(osd, iobuf);
1085 struct osd_fextent {
1088 unsigned int mapped:1;
1091 static int osd_is_mapped(struct dt_object *dt, __u64 offset,
1092 struct osd_fextent *cached_extent)
1094 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1095 sector_t block = offset >> inode->i_blkbits;
1097 struct fiemap_extent_info fei = { 0 };
1098 struct fiemap_extent fe = { 0 };
1099 mm_segment_t saved_fs;
1102 if (block >= cached_extent->start && block < cached_extent->end)
1103 return cached_extent->mapped;
1105 if (i_size_read(inode) == 0)
1108 /* Beyond EOF, must not be mapped */
1109 if (((i_size_read(inode) - 1) >> inode->i_blkbits) < block)
1112 fei.fi_extents_max = 1;
1113 fei.fi_extents_start = &fe;
1115 saved_fs = get_fs();
1117 rc = inode->i_op->fiemap(inode, &fei, offset, FIEMAP_MAX_OFFSET-offset);
1122 start = fe.fe_logical >> inode->i_blkbits;
1124 if (start > block) {
1125 cached_extent->start = block;
1126 cached_extent->end = start;
1127 cached_extent->mapped = 0;
1129 cached_extent->start = start;
1130 cached_extent->end = (fe.fe_logical + fe.fe_length) >>
1132 cached_extent->mapped = 1;
1135 return cached_extent->mapped;
1138 static int osd_declare_write_commit(const struct lu_env *env,
1139 struct dt_object *dt,
1140 struct niobuf_local *lnb, int npages,
1141 struct thandle *handle)
1143 const struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1144 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1145 struct osd_thandle *oh;
1153 long long quota_space = 0;
1154 struct osd_fextent extent = { 0 };
1155 enum osd_qid_declare_flags declare_flags = OSD_QID_BLK;
1158 LASSERT(handle != NULL);
1159 oh = container_of0(handle, struct osd_thandle, ot_super);
1160 LASSERT(oh->ot_handle == NULL);
1164 /* calculate number of extents (probably better to pass nb) */
1165 for (i = 0; i < npages; i++) {
1166 if (i && lnb[i].lnb_file_offset !=
1167 lnb[i - 1].lnb_file_offset + lnb[i - 1].lnb_len)
1170 if (osd_is_mapped(dt, lnb[i].lnb_file_offset, &extent))
1171 lnb[i].lnb_flags |= OBD_BRW_MAPPED;
1173 quota_space += PAGE_SIZE;
1175 /* ignore quota for the whole request if any page is from
1176 * client cache or written by root.
1178 * XXX once we drop the 1.8 client support, the checking
1179 * for whether page is from cache can be simplified as:
1180 * !(lnb[i].flags & OBD_BRW_SYNC)
1182 * XXX we could handle this on per-lnb basis as done by
1184 if ((lnb[i].lnb_flags & OBD_BRW_NOQUOTA) ||
1185 (lnb[i].lnb_flags & (OBD_BRW_FROM_GRANT | OBD_BRW_SYNC)) ==
1187 declare_flags |= OSD_QID_FORCE;
1191 * each extent can go into new leaf causing a split
1192 * 5 is max tree depth: inode + 4 index blocks
1193 * with blockmaps, depth is 3 at most
1195 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
1197 * many concurrent threads may grow tree by the time
1198 * our transaction starts. so, consider 2 is a min depth
1200 depth = ext_depth(inode);
1201 depth = max(depth, 1) + 1;
1203 credits++; /* inode */
1204 credits += depth * 2 * extents;
1208 credits++; /* inode */
1209 credits += depth * extents;
1212 /* quota space for metadata blocks */
1213 quota_space += depth * extents * LDISKFS_BLOCK_SIZE(osd_sb(osd));
1215 /* quota space should be reported in 1K blocks */
1216 quota_space = toqb(quota_space);
1218 /* each new block can go in different group (bitmap + gd) */
1220 /* we can't dirty more bitmap blocks than exist */
1221 if (newblocks > LDISKFS_SB(osd_sb(osd))->s_groups_count)
1222 credits += LDISKFS_SB(osd_sb(osd))->s_groups_count;
1224 credits += newblocks;
1226 /* we can't dirty more gd blocks than exist */
1227 if (newblocks > LDISKFS_SB(osd_sb(osd))->s_gdb_count)
1228 credits += LDISKFS_SB(osd_sb(osd))->s_gdb_count;
1230 credits += newblocks;
1232 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
1234 /* make sure the over quota flags were not set */
1235 lnb[0].lnb_flags &= ~OBD_BRW_OVER_ALLQUOTA;
1237 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1238 i_projid_read(inode), quota_space, oh,
1239 osd_dt_obj(dt), &flags, declare_flags);
1241 /* we need only to store the overquota flags in the first lnb for
1242 * now, once we support multiple objects BRW, this code needs be
1244 if (flags & QUOTA_FL_OVER_USRQUOTA)
1245 lnb[0].lnb_flags |= OBD_BRW_OVER_USRQUOTA;
1246 if (flags & QUOTA_FL_OVER_GRPQUOTA)
1247 lnb[0].lnb_flags |= OBD_BRW_OVER_GRPQUOTA;
1248 if (flags & QUOTA_FL_OVER_PRJQUOTA)
1249 lnb[0].lnb_flags |= OBD_BRW_OVER_PRJQUOTA;
1254 /* Check if a block is allocated or not */
1255 static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
1256 struct niobuf_local *lnb, int npages,
1257 struct thandle *thandle)
1259 struct osd_thread_info *oti = osd_oti_get(env);
1260 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1261 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1262 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1268 rc = osd_init_iobuf(osd, iobuf, 1, npages);
1269 if (unlikely(rc != 0))
1272 isize = i_size_read(inode);
1273 ll_vfs_dq_init(inode);
1275 for (i = 0; i < npages; i++) {
1276 if (lnb[i].lnb_rc == -ENOSPC &&
1277 (lnb[i].lnb_flags & OBD_BRW_MAPPED)) {
1278 /* Allow the write to proceed if overwriting an
1283 if (lnb[i].lnb_rc) { /* ENOSPC, network RPC error, etc. */
1284 CDEBUG(D_INODE, "Skipping [%d] == %d\n", i,
1286 LASSERT(lnb[i].lnb_page);
1287 generic_error_remove_page(inode->i_mapping,
1292 LASSERT(PageLocked(lnb[i].lnb_page));
1293 LASSERT(!PageWriteback(lnb[i].lnb_page));
1295 if (lnb[i].lnb_file_offset + lnb[i].lnb_len > isize)
1296 isize = lnb[i].lnb_file_offset + lnb[i].lnb_len;
1299 * Since write and truncate are serialized by oo_sem, even
1300 * partial-page truncate should not leave dirty pages in the
1303 LASSERT(!PageDirty(lnb[i].lnb_page));
1305 SetPageUptodate(lnb[i].lnb_page);
1307 osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
1310 osd_trans_exec_op(env, thandle, OSD_OT_WRITE);
1312 if (OBD_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC)) {
1314 } else if (iobuf->dr_npages > 0) {
1315 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
1317 iobuf->dr_blocks, 1);
1319 /* no pages to write, no transno is needed */
1320 thandle->th_local = 1;
1323 if (likely(rc == 0)) {
1324 spin_lock(&inode->i_lock);
1325 if (isize > i_size_read(inode)) {
1326 i_size_write(inode, isize);
1327 LDISKFS_I(inode)->i_disksize = isize;
1328 spin_unlock(&inode->i_lock);
1329 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1331 spin_unlock(&inode->i_lock);
1334 rc = osd_do_bio(osd, inode, iobuf);
1335 /* we don't do stats here as in read path because
1336 * write is async: we'll do this in osd_put_bufs() */
1338 osd_fini_iobuf(osd, iobuf);
1341 osd_trans_exec_check(env, thandle, OSD_OT_WRITE);
1343 if (unlikely(rc != 0)) {
1344 /* if write fails, we should drop pages from the cache */
1345 for (i = 0; i < npages; i++) {
1346 if (lnb[i].lnb_page == NULL)
1348 LASSERT(PageLocked(lnb[i].lnb_page));
1349 generic_error_remove_page(inode->i_mapping,
1357 static int osd_read_prep(const struct lu_env *env, struct dt_object *dt,
1358 struct niobuf_local *lnb, int npages)
1360 struct osd_thread_info *oti = osd_oti_get(env);
1361 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1362 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1363 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1364 int rc = 0, i, cache = 0, cache_hits = 0, cache_misses = 0;
1371 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1372 if (unlikely(rc != 0))
1375 isize = i_size_read(inode);
1377 if (osd->od_read_cache)
1379 if (isize > osd->od_readcache_max_filesize)
1382 start = ktime_get();
1383 for (i = 0; i < npages; i++) {
1385 if (isize <= lnb[i].lnb_file_offset)
1386 /* If there's no more data, abort early.
1387 * lnb->lnb_rc == 0, so it's easy to detect later. */
1390 if (isize < lnb[i].lnb_file_offset + lnb[i].lnb_len)
1391 lnb[i].lnb_rc = isize - lnb[i].lnb_file_offset;
1393 lnb[i].lnb_rc = lnb[i].lnb_len;
1395 /* Bypass disk read if fail_loc is set properly */
1396 if (OBD_FAIL_CHECK(OBD_FAIL_OST_FAKE_RW))
1397 SetPageUptodate(lnb[i].lnb_page);
1399 if (PageUptodate(lnb[i].lnb_page)) {
1403 osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
1407 generic_error_remove_page(inode->i_mapping,
1411 timediff = ktime_us_delta(end, start);
1412 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1414 if (cache_hits != 0)
1415 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_HIT,
1417 if (cache_misses != 0)
1418 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_MISS,
1420 if (cache_hits + cache_misses != 0)
1421 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
1422 cache_hits + cache_misses);
1424 if (iobuf->dr_npages) {
1425 rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
1427 iobuf->dr_blocks, 0);
1428 rc = osd_do_bio(osd, inode, iobuf);
1430 /* IO stats will be done in osd_bufs_put() */
1437 * XXX: Another layering violation for now.
1439 * We don't want to use ->f_op->read methods, because generic file write
1441 * - serializes on ->i_sem, and
1443 * - does a lot of extra work like balance_dirty_pages(),
1445 * which doesn't work for globally shared files like /last_rcvd.
1447 static int osd_ldiskfs_readlink(struct inode *inode, char *buffer, int buflen)
1449 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
1451 memcpy(buffer, (char *)ei->i_data, buflen);
1456 int osd_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs)
1458 struct buffer_head *bh;
1459 unsigned long block;
1465 /* prevent reading after eof */
1466 spin_lock(&inode->i_lock);
1467 if (i_size_read(inode) < *offs + size) {
1468 loff_t diff = i_size_read(inode) - *offs;
1469 spin_unlock(&inode->i_lock);
1471 CDEBUG(D_EXT2, "size %llu is too short to read @%llu\n",
1472 i_size_read(inode), *offs);
1474 } else if (diff == 0) {
1480 spin_unlock(&inode->i_lock);
1483 blocksize = 1 << inode->i_blkbits;
1486 block = *offs >> inode->i_blkbits;
1487 boffs = *offs & (blocksize - 1);
1488 csize = min(blocksize - boffs, size);
1489 bh = __ldiskfs_bread(NULL, inode, block, 0);
1491 CERROR("%s: can't read %u@%llu on ino %lu: "
1492 "rc = %ld\n", osd_ino2name(inode),
1493 csize, *offs, inode->i_ino,
1499 memcpy(buf, bh->b_data + boffs, csize);
1502 memset(buf, 0, csize);
1512 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
1513 struct lu_buf *buf, loff_t *pos)
1515 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1518 /* Read small symlink from inode body as we need to maintain correct
1519 * on-disk symlinks for ldiskfs.
1521 if (S_ISLNK(dt->do_lu.lo_header->loh_attr) &&
1522 (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
1523 rc = osd_ldiskfs_readlink(inode, buf->lb_buf, buf->lb_len);
1525 rc = osd_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
1530 static inline int osd_extents_enabled(struct super_block *sb,
1531 struct inode *inode)
1533 if (inode != NULL) {
1534 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL)
1536 } else if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
1537 LDISKFS_FEATURE_INCOMPAT_EXTENTS)) {
1543 int osd_calc_bkmap_credits(struct super_block *sb, struct inode *inode,
1544 const loff_t size, const loff_t pos,
1547 int credits, bits, bs, i;
1549 bits = sb->s_blocksize_bits;
1552 /* legacy blockmap: 3 levels * 3 (bitmap,gd,itself)
1553 * we do not expect blockmaps on the large files,
1554 * so let's shrink it to 2 levels (4GB files) */
1556 /* this is default reservation: 2 levels */
1557 credits = (blocks + 2) * 3;
1559 /* actual offset is unknown, hard to optimize */
1563 /* now check for few specific cases to optimize */
1564 if (pos + size <= LDISKFS_NDIR_BLOCKS * bs) {
1567 /* allocate if not allocated */
1568 if (inode == NULL) {
1569 credits += blocks * 2;
1572 for (i = (pos >> bits); i < (pos >> bits) + blocks; i++) {
1573 LASSERT(i < LDISKFS_NDIR_BLOCKS);
1574 if (LDISKFS_I(inode)->i_data[i] == 0)
1577 } else if (pos + size <= (LDISKFS_NDIR_BLOCKS + 1024) * bs) {
1578 /* single indirect */
1579 credits = blocks * 3;
1580 if (inode == NULL ||
1581 LDISKFS_I(inode)->i_data[LDISKFS_IND_BLOCK] == 0)
1584 /* The indirect block may be modified. */
1591 static ssize_t osd_declare_write(const struct lu_env *env, struct dt_object *dt,
1592 const struct lu_buf *buf, loff_t _pos,
1593 struct thandle *handle)
1595 struct osd_object *obj = osd_dt_obj(dt);
1596 struct inode *inode = obj->oo_inode;
1597 struct super_block *sb = osd_sb(osd_obj2dev(obj));
1598 struct osd_thandle *oh;
1599 int rc = 0, est = 0, credits, blocks, allocated = 0;
1605 LASSERT(buf != NULL);
1606 LASSERT(handle != NULL);
1608 oh = container_of0(handle, struct osd_thandle, ot_super);
1609 LASSERT(oh->ot_handle == NULL);
1612 bits = sb->s_blocksize_bits;
1616 /* if this is an append, then we
1617 * should expect cross-block record */
1623 /* blocks to modify */
1624 blocks = ((pos + size + bs - 1) >> bits) - (pos >> bits);
1625 LASSERT(blocks > 0);
1627 if (inode != NULL && _pos != -1) {
1628 /* object size in blocks */
1629 est = (i_size_read(inode) + bs - 1) >> bits;
1630 allocated = inode->i_blocks >> (bits - 9);
1631 if (pos + size <= i_size_read(inode) && est <= allocated) {
1632 /* looks like an overwrite, no need to modify tree */
1634 /* no need to modify i_size */
1639 if (osd_extents_enabled(sb, inode)) {
1641 * many concurrent threads may grow tree by the time
1642 * our transaction starts. so, consider 2 is a min depth
1643 * for every level we may need to allocate a new block
1644 * and take some entries from the old one. so, 3 blocks
1645 * to allocate (bitmap, gd, itself) + old block - 4 per
1648 depth = inode != NULL ? ext_depth(inode) : 0;
1649 depth = max(depth, 1) + 1;
1651 /* if not append, then split may need to modify
1652 * existing blocks moving entries into the new ones */
1655 /* blocks to store data: bitmap,gd,itself */
1656 credits += blocks * 3;
1658 credits = osd_calc_bkmap_credits(sb, inode, size, _pos, blocks);
1660 /* if inode is created as part of the transaction,
1661 * then it's counted already by the creation method */
1667 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
1669 /* dt_declare_write() is usually called for system objects, such
1670 * as llog or last_rcvd files. We needn't enforce quota on those
1671 * objects, so always set the lqi_space as 0. */
1673 rc = osd_declare_inode_qid(env, i_uid_read(inode),
1675 i_projid_read(inode), 0,
1676 oh, obj, NULL, OSD_QID_BLK);
1680 static int osd_ldiskfs_writelink(struct inode *inode, char *buffer, int buflen)
1682 /* LU-2634: clear the extent format for fast symlink */
1683 ldiskfs_clear_inode_flag(inode, LDISKFS_INODE_EXTENTS);
1685 memcpy((char *)&LDISKFS_I(inode)->i_data, (char *)buffer, buflen);
1686 spin_lock(&inode->i_lock);
1687 LDISKFS_I(inode)->i_disksize = buflen;
1688 i_size_write(inode, buflen);
1689 spin_unlock(&inode->i_lock);
1690 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1695 int osd_ldiskfs_write_record(struct inode *inode, void *buf, int bufsize,
1696 int write_NUL, loff_t *offs, handle_t *handle)
1698 struct buffer_head *bh = NULL;
1699 loff_t offset = *offs;
1700 loff_t new_size = i_size_read(inode);
1701 unsigned long block;
1702 int blocksize = 1 << inode->i_blkbits;
1706 int dirty_inode = 0;
1710 * long symlink write does not count the NUL terminator in
1711 * bufsize, we write it, and the inode's file size does not
1712 * count the NUL terminator as well.
1714 ((char *)buf)[bufsize] = '\0';
1718 while (bufsize > 0) {
1719 int credits = handle->h_buffer_credits;
1724 block = offset >> inode->i_blkbits;
1725 boffs = offset & (blocksize - 1);
1726 size = min(blocksize - boffs, bufsize);
1727 bh = __ldiskfs_bread(handle, inode, block, 1);
1728 if (IS_ERR_OR_NULL(bh)) {
1736 CERROR("%s: error reading offset %llu (block %lu, "
1737 "size %d, offs %llu), credits %d/%d: rc = %d\n",
1738 inode->i_sb->s_id, offset, block, bufsize, *offs,
1739 credits, handle->h_buffer_credits, err);
1743 err = ldiskfs_journal_get_write_access(handle, bh);
1745 CERROR("journal_get_write_access() returned error %d\n",
1749 LASSERTF(boffs + size <= bh->b_size,
1750 "boffs %d size %d bh->b_size %lu\n",
1751 boffs, size, (unsigned long)bh->b_size);
1752 memcpy(bh->b_data + boffs, buf, size);
1753 err = ldiskfs_handle_dirty_metadata(handle, NULL, bh);
1757 if (offset + size > new_size)
1758 new_size = offset + size;
1768 /* correct in-core and on-disk sizes */
1769 if (new_size > i_size_read(inode)) {
1770 spin_lock(&inode->i_lock);
1771 if (new_size > i_size_read(inode))
1772 i_size_write(inode, new_size);
1773 if (i_size_read(inode) > LDISKFS_I(inode)->i_disksize) {
1774 LDISKFS_I(inode)->i_disksize = i_size_read(inode);
1777 spin_unlock(&inode->i_lock);
1779 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1787 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
1788 const struct lu_buf *buf, loff_t *pos,
1789 struct thandle *handle, int ignore_quota)
1791 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1792 struct osd_thandle *oh;
1796 LASSERT(dt_object_exists(dt));
1798 LASSERT(handle != NULL);
1799 LASSERT(inode != NULL);
1800 ll_vfs_dq_init(inode);
1802 /* XXX: don't check: one declared chunk can be used many times */
1803 /* osd_trans_exec_op(env, handle, OSD_OT_WRITE); */
1805 oh = container_of(handle, struct osd_thandle, ot_super);
1806 LASSERT(oh->ot_handle->h_transaction != NULL);
1807 osd_trans_exec_op(env, handle, OSD_OT_WRITE);
1809 /* Write small symlink to inode body as we need to maintain correct
1810 * on-disk symlinks for ldiskfs.
1811 * Note: the buf->lb_buf contains a NUL terminator while buf->lb_len
1812 * does not count it in.
1814 is_link = S_ISLNK(dt->do_lu.lo_header->loh_attr);
1815 if (is_link && (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
1816 result = osd_ldiskfs_writelink(inode, buf->lb_buf, buf->lb_len);
1818 result = osd_ldiskfs_write_record(inode, buf->lb_buf,
1819 buf->lb_len, is_link, pos,
1822 result = buf->lb_len;
1824 osd_trans_exec_check(env, handle, OSD_OT_WRITE);
1829 static int osd_declare_punch(const struct lu_env *env, struct dt_object *dt,
1830 __u64 start, __u64 end, struct thandle *th)
1832 struct osd_thandle *oh;
1833 struct inode *inode;
1838 oh = container_of(th, struct osd_thandle, ot_super);
1841 * we don't need to reserve credits for whole truncate
1842 * it's not possible as truncate may need to free too many
1843 * blocks and that won't fit a single transaction. instead
1844 * we reserve credits to change i_size and put inode onto
1845 * orphan list. if needed truncate will extend or restart
1848 osd_trans_declare_op(env, oh, OSD_OT_PUNCH,
1849 osd_dto_credits_noquota[DTO_ATTR_SET_BASE] + 3);
1851 inode = osd_dt_obj(dt)->oo_inode;
1854 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1855 i_projid_read(inode), 0, oh, osd_dt_obj(dt),
1860 static int osd_punch(const struct lu_env *env, struct dt_object *dt,
1861 __u64 start, __u64 end, struct thandle *th)
1863 struct osd_thandle *oh;
1864 struct osd_object *obj = osd_dt_obj(dt);
1865 struct inode *inode = obj->oo_inode;
1868 int rc = 0, rc2 = 0;
1871 LASSERT(end == OBD_OBJECT_EOF);
1872 LASSERT(dt_object_exists(dt));
1873 LASSERT(osd_invariant(obj));
1874 LASSERT(inode != NULL);
1875 ll_vfs_dq_init(inode);
1878 oh = container_of(th, struct osd_thandle, ot_super);
1879 LASSERT(oh->ot_handle->h_transaction != NULL);
1881 osd_trans_exec_op(env, th, OSD_OT_PUNCH);
1883 tid = oh->ot_handle->h_transaction->t_tid;
1885 spin_lock(&inode->i_lock);
1886 i_size_write(inode, start);
1887 spin_unlock(&inode->i_lock);
1888 ll_truncate_pagecache(inode, start);
1889 #ifdef HAVE_INODEOPS_TRUNCATE
1890 if (inode->i_op->truncate) {
1891 inode->i_op->truncate(inode);
1894 ldiskfs_truncate(inode);
1897 * For a partial-page truncate, flush the page to disk immediately to
1898 * avoid data corruption during direct disk write. b=17397
1900 if ((start & ~PAGE_MASK) != 0)
1901 rc = filemap_fdatawrite_range(inode->i_mapping, start, start+1);
1903 h = journal_current_handle();
1905 LASSERT(h == oh->ot_handle);
1907 /* do not check credits with osd_trans_exec_check() as the truncate
1908 * can restart the transaction internally and we restart the
1909 * transaction in this case */
1911 if (tid != h->h_transaction->t_tid) {
1912 int credits = oh->ot_credits;
1914 * transaction has changed during truncate
1915 * we need to restart the handle with our credits
1917 if (h->h_buffer_credits < credits) {
1918 if (ldiskfs_journal_extend(h, credits))
1919 rc2 = ldiskfs_journal_restart(h, credits);
1923 RETURN(rc == 0 ? rc2 : rc);
1926 static int fiemap_check_ranges(struct inode *inode,
1927 u64 start, u64 len, u64 *new_len)
1936 if (ldiskfs_test_inode_flag(inode, LDISKFS_INODE_EXTENTS))
1937 maxbytes = inode->i_sb->s_maxbytes;
1939 maxbytes = LDISKFS_SB(inode->i_sb)->s_bitmap_maxbytes;
1941 if (start > maxbytes)
1945 * Shrink request scope to what the fs can actually handle.
1947 if (len > maxbytes || (maxbytes - len) < start)
1948 *new_len = maxbytes - start;
1953 /* So that the fiemap access checks can't overflow on 32 bit machines. */
1954 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
1956 static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
1959 struct fiemap_extent_info fieinfo = {0, };
1960 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1966 if (inode->i_op->fiemap == NULL)
1969 if (fm->fm_extent_count > FIEMAP_MAX_EXTENTS)
1972 rc = fiemap_check_ranges(inode, fm->fm_start, fm->fm_length, &len);
1976 fieinfo.fi_flags = fm->fm_flags;
1977 fieinfo.fi_extents_max = fm->fm_extent_count;
1978 fieinfo.fi_extents_start = fm->fm_extents;
1980 if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
1981 filemap_write_and_wait(inode->i_mapping);
1983 rc = inode->i_op->fiemap(inode, &fieinfo, fm->fm_start, len);
1984 fm->fm_flags = fieinfo.fi_flags;
1985 fm->fm_mapped_extents = fieinfo.fi_extents_mapped;
1990 static int osd_ladvise(const struct lu_env *env, struct dt_object *dt,
1991 __u64 start, __u64 end, enum lu_ladvise_type advice)
1994 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1998 case LU_LADVISE_DONTNEED:
2001 invalidate_mapping_pages(inode->i_mapping,
2002 start >> PAGE_CACHE_SHIFT,
2003 (end - 1) >> PAGE_CACHE_SHIFT);
2014 * in some cases we may need declare methods for objects being created
2015 * e.g., when we create symlink
2017 const struct dt_body_operations osd_body_ops_new = {
2018 .dbo_declare_write = osd_declare_write,
2021 const struct dt_body_operations osd_body_ops = {
2022 .dbo_read = osd_read,
2023 .dbo_declare_write = osd_declare_write,
2024 .dbo_write = osd_write,
2025 .dbo_bufs_get = osd_bufs_get,
2026 .dbo_bufs_put = osd_bufs_put,
2027 .dbo_write_prep = osd_write_prep,
2028 .dbo_declare_write_commit = osd_declare_write_commit,
2029 .dbo_write_commit = osd_write_commit,
2030 .dbo_read_prep = osd_read_prep,
2031 .dbo_declare_punch = osd_declare_punch,
2032 .dbo_punch = osd_punch,
2033 .dbo_fiemap_get = osd_fiemap_get,
2034 .dbo_ladvise = osd_ladvise,