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, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
35 * Author: Nikita Danilov <nikita@clusterfs.com>
36 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
40 #define DEBUG_SUBSYSTEM S_OSD
42 /* prerequisite for linux/xattr.h */
43 #include <linux/types.h>
44 /* prerequisite for linux/xattr.h */
47 #include <linux/swap.h>
48 #include <linux/pagevec.h>
51 * struct OBD_{ALLOC,FREE}*()
54 #include <obd_support.h>
56 #include "osd_internal.h"
59 #include <ldiskfs/ldiskfs_extents.h>
60 #include <ldiskfs/ldiskfs.h>
62 static inline bool osd_use_page_cache(struct osd_device *d)
64 /* do not use pagecache if write and read caching are disabled */
65 if (d->od_writethrough_cache + d->od_read_cache == 0)
67 /* use pagecache by default */
71 static int __osd_init_iobuf(struct osd_device *d, struct osd_iobuf *iobuf,
72 int rw, int line, int pages)
76 LASSERTF(iobuf->dr_elapsed_valid == 0,
77 "iobuf %p, reqs %d, rw %d, line %d\n", iobuf,
78 atomic_read(&iobuf->dr_numreqs), iobuf->dr_rw,
80 LASSERT(pages <= PTLRPC_MAX_BRW_PAGES);
82 init_waitqueue_head(&iobuf->dr_wait);
83 atomic_set(&iobuf->dr_numreqs, 0);
88 iobuf->dr_elapsed = ktime_set(0, 0);
89 /* must be counted before, so assert */
91 iobuf->dr_init_at = line;
93 blocks = pages * (PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
94 if (iobuf->dr_bl_buf.lb_len >= blocks * sizeof(iobuf->dr_blocks[0])) {
95 LASSERT(iobuf->dr_pg_buf.lb_len >=
96 pages * sizeof(iobuf->dr_pages[0]));
100 /* start with 1MB for 4K blocks */
102 while (i <= PTLRPC_MAX_BRW_PAGES && i < pages)
105 CDEBUG(D_OTHER, "realloc %u for %u (%u) pages\n",
106 (unsigned int)(pages * sizeof(iobuf->dr_pages[0])), i, pages);
108 blocks = pages * (PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
109 iobuf->dr_max_pages = 0;
110 CDEBUG(D_OTHER, "realloc %u for %u blocks\n",
111 (unsigned int)(blocks * sizeof(iobuf->dr_blocks[0])), blocks);
113 lu_buf_realloc(&iobuf->dr_bl_buf, blocks * sizeof(iobuf->dr_blocks[0]));
114 iobuf->dr_blocks = iobuf->dr_bl_buf.lb_buf;
115 if (unlikely(iobuf->dr_blocks == NULL))
118 lu_buf_realloc(&iobuf->dr_pg_buf, pages * sizeof(iobuf->dr_pages[0]));
119 iobuf->dr_pages = iobuf->dr_pg_buf.lb_buf;
120 if (unlikely(iobuf->dr_pages == NULL))
123 lu_buf_realloc(&iobuf->dr_lnb_buf,
124 pages * sizeof(iobuf->dr_lnbs[0]));
125 iobuf->dr_lnbs = iobuf->dr_lnb_buf.lb_buf;
126 if (unlikely(iobuf->dr_lnbs == NULL))
129 iobuf->dr_max_pages = pages;
133 #define osd_init_iobuf(dev, iobuf, rw, pages) \
134 __osd_init_iobuf(dev, iobuf, rw, __LINE__, pages)
136 static void osd_iobuf_add_page(struct osd_iobuf *iobuf,
137 struct niobuf_local *lnb)
139 LASSERT(iobuf->dr_npages < iobuf->dr_max_pages);
140 iobuf->dr_pages[iobuf->dr_npages] = lnb->lnb_page;
141 iobuf->dr_lnbs[iobuf->dr_npages] = lnb;
145 void osd_fini_iobuf(struct osd_device *d, struct osd_iobuf *iobuf)
147 int rw = iobuf->dr_rw;
149 if (iobuf->dr_elapsed_valid) {
150 struct brw_stats *h = &d->od_brw_stats;
152 iobuf->dr_elapsed_valid = 0;
153 LASSERT(iobuf->dr_dev == d);
154 LASSERT(iobuf->dr_frags > 0);
155 lprocfs_oh_tally_pcpu(&h->bs_hist[BRW_R_DIO_FRAGS+rw],
157 lprocfs_oh_tally_log2_pcpu(&h->bs_hist[BRW_R_IO_TIME+rw],
158 ktime_to_ms(iobuf->dr_elapsed));
162 #ifdef HAVE_BIO_ENDIO_USES_ONE_ARG
163 static void dio_complete_routine(struct bio *bio)
165 int error = blk_status_to_errno(bio->bi_status);
167 static void dio_complete_routine(struct bio *bio, int error)
170 struct osd_iobuf *iobuf = bio->bi_private;
173 /* CAVEAT EMPTOR: possibly in IRQ context
174 * DO NOT record procfs stats here!!!
177 if (unlikely(iobuf == NULL)) {
178 CERROR("***** bio->bi_private is NULL! Dump the bio contents to the console. Please report this to <https://jira.whamcloud.com/>, and probably have to reboot this node.\n");
179 CERROR("bi_next: %p, bi_flags: %lx, " __stringify(bi_opf)
180 ": %x, bi_vcnt: %d, bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, bi_private: %p\n",
181 bio->bi_next, (unsigned long)bio->bi_flags,
182 (unsigned int)bio->bi_opf, bio->bi_vcnt, bio_idx(bio),
183 bio_sectors(bio) << 9, bio->bi_end_io,
184 atomic_read(&bio->__bi_cnt),
189 /* the check is outside of the cycle for performance reason -bzzz */
190 if (!bio_data_dir(bio)) {
191 DECLARE_BVEC_ITER_ALL(iter_all);
193 bio_for_each_segment_all(bvl, bio, iter_all) {
194 if (likely(error == 0))
195 SetPageUptodate(bvl_to_page(bvl));
196 LASSERT(PageLocked(bvl_to_page(bvl)));
198 atomic_dec(&iobuf->dr_dev->od_r_in_flight);
200 atomic_dec(&iobuf->dr_dev->od_w_in_flight);
203 /* any real error is good enough -bzzz */
204 if (error != 0 && iobuf->dr_error == 0)
205 iobuf->dr_error = error;
208 * set dr_elapsed before dr_numreqs turns to 0, otherwise
209 * it's possible that service thread will see dr_numreqs
210 * is zero, but dr_elapsed is not set yet, leading to lost
211 * data in this processing and an assertion in a subsequent
214 if (atomic_read(&iobuf->dr_numreqs) == 1) {
215 ktime_t now = ktime_get();
217 iobuf->dr_elapsed = ktime_sub(now, iobuf->dr_start_time);
218 iobuf->dr_elapsed_valid = 1;
220 if (atomic_dec_and_test(&iobuf->dr_numreqs))
221 wake_up(&iobuf->dr_wait);
223 /* Completed bios used to be chained off iobuf->dr_bios and freed in
224 * filter_clear_dreq(). It was then possible to exhaust the biovec-256
225 * mempool when serious on-disk fragmentation was encountered,
226 * deadlocking the OST. The bios are now released as soon as complete
227 * so the pool cannot be exhausted while IOs are competing. b=10076
232 static void record_start_io(struct osd_iobuf *iobuf, int size)
234 struct osd_device *osd = iobuf->dr_dev;
235 struct brw_stats *h = &osd->od_brw_stats;
238 atomic_inc(&iobuf->dr_numreqs);
240 if (iobuf->dr_rw == 0) {
241 atomic_inc(&osd->od_r_in_flight);
242 lprocfs_oh_tally_pcpu(&h->bs_hist[BRW_R_RPC_HIST],
243 atomic_read(&osd->od_r_in_flight));
244 lprocfs_oh_tally_log2_pcpu(&h->bs_hist[BRW_R_DISK_IOSIZE],
246 } else if (iobuf->dr_rw == 1) {
247 atomic_inc(&osd->od_w_in_flight);
248 lprocfs_oh_tally_pcpu(&h->bs_hist[BRW_W_RPC_HIST],
249 atomic_read(&osd->od_w_in_flight));
250 lprocfs_oh_tally_log2_pcpu(&h->bs_hist[BRW_W_DISK_IOSIZE],
257 static void osd_submit_bio(int rw, struct bio *bio)
259 LASSERTF(rw == 0 || rw == 1, "%x\n", rw);
260 #ifdef HAVE_SUBMIT_BIO_2ARGS
261 submit_bio(rw ? WRITE : READ, bio);
268 static int can_be_merged(struct bio *bio, sector_t sector)
273 return bio_end_sector(bio) == sector ? 1 : 0;
276 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
278 * This function will change the data written, thus it should only be
279 * used when checking data integrity feature
281 static void bio_integrity_fault_inject(struct bio *bio)
283 struct bio_vec *bvec;
284 DECLARE_BVEC_ITER_ALL(iter_all);
288 bio_for_each_segment_all(bvec, bio, iter_all) {
289 struct page *page = bvec->bv_page;
299 static int bio_dif_compare(__u16 *expected_guard_buf, void *bio_prot_buf,
300 unsigned int sectors, int tuple_size)
302 __u16 *expected_guard;
306 expected_guard = expected_guard_buf;
307 for (i = 0; i < sectors; i++) {
308 bio_guard = (__u16 *)bio_prot_buf;
309 if (*bio_guard != *expected_guard) {
311 "unexpected guard tags on sector %d expected guard %u, bio guard %u, sectors %u, tuple size %d\n",
312 i, *expected_guard, *bio_guard, sectors,
317 bio_prot_buf += tuple_size;
322 static int osd_bio_integrity_compare(struct bio *bio, struct block_device *bdev,
323 struct osd_iobuf *iobuf, int index)
325 struct blk_integrity *bi = bdev_get_integrity(bdev);
326 struct bio_integrity_payload *bip = bio->bi_integrity;
327 struct niobuf_local *lnb = NULL;
328 unsigned short sector_size = blk_integrity_interval(bi);
329 void *bio_prot_buf = page_address(bip->bip_vec->bv_page) +
330 bip->bip_vec->bv_offset;
332 sector_t sector = bio_start_sector(bio);
333 unsigned int i, sectors, total;
334 DECLARE_BVEC_ITER_ALL(iter_all);
335 __u16 *expected_guard;
339 bio_for_each_segment_all(bv, bio, iter_all) {
340 for (i = index; i < iobuf->dr_npages; i++) {
341 if (iobuf->dr_pages[i] == bv->bv_page) {
342 lnb = iobuf->dr_lnbs[i];
348 expected_guard = lnb->lnb_guards;
349 sectors = bv->bv_len / sector_size;
350 if (lnb->lnb_guard_rpc) {
351 rc = bio_dif_compare(expected_guard, bio_prot_buf,
352 sectors, bi->tuple_size);
358 bio_prot_buf += sectors * bi->tuple_size;
359 total += sectors * bi->tuple_size;
360 LASSERT(total <= bip_size(bio->bi_integrity));
367 static int osd_bio_integrity_handle(struct osd_device *osd, struct bio *bio,
368 struct osd_iobuf *iobuf,
369 int start_page_idx, bool fault_inject,
370 bool integrity_enabled)
372 struct super_block *sb = osd_sb(osd);
373 integrity_gen_fn *generate_fn = NULL;
374 integrity_vrfy_fn *verify_fn = NULL;
379 if (!integrity_enabled)
382 rc = osd_get_integrity_profile(osd, &generate_fn, &verify_fn);
386 rc = bio_integrity_prep_fn(bio, generate_fn, verify_fn);
390 /* Verify and inject fault only when writing */
391 if (iobuf->dr_rw == 1) {
392 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_OST_INTEGRITY_CMP))) {
393 rc = osd_bio_integrity_compare(bio, sb->s_bdev, iobuf,
399 if (unlikely(fault_inject))
400 bio_integrity_fault_inject(bio);
406 #ifdef HAVE_BIO_INTEGRITY_PREP_FN
407 # ifdef HAVE_BIO_ENDIO_USES_ONE_ARG
408 static void dio_integrity_complete_routine(struct bio *bio)
410 static void dio_integrity_complete_routine(struct bio *bio, int error)
413 struct osd_bio_private *bio_private = bio->bi_private;
415 bio->bi_private = bio_private->obp_iobuf;
416 osd_dio_complete_routine(bio, error);
418 OBD_FREE_PTR(bio_private);
420 #endif /* HAVE_BIO_INTEGRITY_PREP_FN */
421 #else /* !CONFIG_BLK_DEV_INTEGRITY */
422 #define osd_bio_integrity_handle(osd, bio, iobuf, start_page_idx, \
423 fault_inject, integrity_enabled) 0
424 #endif /* CONFIG_BLK_DEV_INTEGRITY */
426 static int osd_bio_init(struct bio *bio, struct osd_iobuf *iobuf,
427 bool integrity_enabled, int start_page_idx,
428 struct osd_bio_private **pprivate)
434 #ifdef HAVE_BIO_INTEGRITY_PREP_FN
435 if (integrity_enabled) {
436 struct osd_bio_private *bio_private = NULL;
438 OBD_ALLOC_GFP(bio_private, sizeof(*bio_private), GFP_NOIO);
439 if (bio_private == NULL)
441 bio->bi_end_io = dio_integrity_complete_routine;
442 bio->bi_private = bio_private;
443 bio_private->obp_start_page_idx = start_page_idx;
444 bio_private->obp_iobuf = iobuf;
445 *pprivate = bio_private;
449 bio->bi_end_io = dio_complete_routine;
450 bio->bi_private = iobuf;
456 static void osd_mark_page_io_done(struct osd_iobuf *iobuf,
458 sector_t start_blocks,
461 struct niobuf_local *lnb;
462 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
463 pgoff_t pg_start, pg_end;
465 pg_start = start_blocks / blocks_per_page;
466 if (start_blocks % blocks_per_page)
468 if (count >= blocks_per_page)
469 pg_end = (start_blocks + count -
470 blocks_per_page) / blocks_per_page;
472 return; /* nothing to mark */
473 for ( ; pg_start <= pg_end; pg_start++) {
474 lnb = iobuf->dr_lnbs[pg_start];
475 lnb->lnb_flags |= OBD_BRW_DONE;
479 static int osd_do_bio(struct osd_device *osd, struct inode *inode,
480 struct osd_iobuf *iobuf, sector_t start_blocks,
483 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
484 struct page **pages = iobuf->dr_pages;
485 int npages = iobuf->dr_npages;
486 sector_t *blocks = iobuf->dr_blocks;
487 struct super_block *sb = inode->i_sb;
488 int sector_bits = sb->s_blocksize_bits - 9;
489 unsigned int blocksize = sb->s_blocksize;
490 struct block_device *bdev = sb->s_bdev;
491 struct osd_bio_private *bio_private = NULL;
492 struct bio *bio = NULL;
493 int bio_start_page_idx;
495 unsigned int page_offset;
498 int block_idx, block_idx_end;
499 int page_idx, page_idx_start;
503 bool integrity_enabled;
504 struct blk_plug plug;
505 int blocks_left_page;
509 fault_inject = OBD_FAIL_CHECK(OBD_FAIL_OST_INTEGRITY_FAULT);
510 LASSERT(iobuf->dr_npages == npages);
512 integrity_enabled = bdev_integrity_enabled(bdev, iobuf->dr_rw);
514 osd_brw_stats_update(osd, iobuf);
515 iobuf->dr_start_time = ktime_get();
518 count = npages * blocks_per_page;
519 block_idx_end = start_blocks + count;
521 blk_start_plug(&plug);
523 page_idx_start = start_blocks / blocks_per_page;
524 for (page_idx = page_idx_start, block_idx = start_blocks;
525 block_idx < block_idx_end; page_idx++,
526 block_idx += blocks_left_page) {
527 /* For cases where the filesystems blocksize is not the
528 * same as PAGE_SIZE (e.g. ARM with PAGE_SIZE=64KB and
529 * blocksize=4KB), there will be multiple blocks to
530 * read/write per page. Also, the start and end block may
531 * not be aligned to the start and end of the page, so the
532 * first page may skip some blocks at the start ("i != 0",
533 * "blocks_left_page" is reduced), and the last page may
534 * skip some blocks at the end (limited by "count").
536 page = pages[page_idx];
537 LASSERT(page_idx < iobuf->dr_npages);
539 i = block_idx % blocks_per_page;
540 blocks_left_page = blocks_per_page - i;
541 if (block_idx + blocks_left_page > block_idx_end)
542 blocks_left_page = block_idx_end - block_idx;
543 page_offset = i * blocksize;
544 for (i = 0; i < blocks_left_page;
545 i += nblocks, page_offset += blocksize * nblocks) {
548 if (blocks[block_idx + i] == 0) { /* hole */
549 LASSERTF(iobuf->dr_rw == 0,
550 "page_idx %u, block_idx %u, i %u,"
551 "start_blocks: %llu, count: %llu, npages: %d\n",
552 page_idx, block_idx, i,
553 (unsigned long long)start_blocks,
554 (unsigned long long)count, npages);
555 memset(kmap(page) + page_offset, 0, blocksize);
560 sector = (sector_t)blocks[block_idx + i] << sector_bits;
562 /* Additional contiguous file blocks? */
563 while (i + nblocks < blocks_left_page &&
564 (sector + (nblocks << sector_bits)) ==
565 ((sector_t)blocks[block_idx + i + nblocks] <<
569 if (bio && can_be_merged(bio, sector) &&
570 bio_add_page(bio, page, blocksize * nblocks,
572 continue; /* added this frag OK */
575 struct request_queue *q = bio_get_queue(bio);
576 unsigned int bi_size = bio_sectors(bio) << 9;
578 /* Dang! I have to fragment this I/O */
580 "bio++ sz %d vcnt %d(%d) sectors %d(%d) psg %d(%d)\n",
581 bi_size, bio->bi_vcnt, bio->bi_max_vecs,
583 queue_max_sectors(q),
584 osd_bio_nr_segs(bio),
585 queue_max_segments(q));
586 rc = osd_bio_integrity_handle(osd, bio,
587 iobuf, bio_start_page_idx,
588 fault_inject, integrity_enabled);
594 record_start_io(iobuf, bi_size);
595 osd_submit_bio(iobuf->dr_rw, bio);
598 bio_start_page_idx = page_idx;
599 /* allocate new bio */
600 bio = bio_alloc(GFP_NOIO, min(BIO_MAX_PAGES,
601 (block_idx_end - block_idx +
602 blocks_left_page - 1)));
604 CERROR("Can't allocate bio %u pages\n",
605 block_idx_end - block_idx +
606 blocks_left_page - 1);
611 bio_set_dev(bio, bdev);
612 bio_set_sector(bio, sector);
613 bio->bi_opf = iobuf->dr_rw ? WRITE : READ;
614 rc = osd_bio_init(bio, iobuf, integrity_enabled,
615 bio_start_page_idx, &bio_private);
621 rc = bio_add_page(bio, page,
622 blocksize * nblocks, page_offset);
628 rc = osd_bio_integrity_handle(osd, bio, iobuf,
637 record_start_io(iobuf, bio_sectors(bio) << 9);
638 osd_submit_bio(iobuf->dr_rw, bio);
643 blk_finish_plug(&plug);
645 /* in order to achieve better IO throughput, we don't wait for writes
646 * completion here. instead we proceed with transaction commit in
647 * parallel and wait for IO completion once transaction is stopped
648 * see osd_trans_stop() for more details -bzzz
650 if (iobuf->dr_rw == 0 || fault_inject) {
651 wait_event(iobuf->dr_wait,
652 atomic_read(&iobuf->dr_numreqs) == 0);
653 osd_fini_iobuf(osd, iobuf);
657 rc = iobuf->dr_error;
660 OBD_FREE_PTR(bio_private);
664 if (rc == 0 && iobuf->dr_rw)
665 osd_mark_page_io_done(iobuf, inode,
666 start_blocks, count);
671 static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
672 struct niobuf_local *lnb, int maxlnb)
680 int poff = offset & (PAGE_SIZE - 1);
681 int plen = PAGE_SIZE - poff;
683 if (*nrpages >= maxlnb) {
690 lnb->lnb_file_offset = offset;
691 lnb->lnb_page_offset = poff;
693 /* lnb->lnb_flags = rnb->rnb_flags; */
695 lnb->lnb_page = NULL;
697 lnb->lnb_guard_rpc = 0;
698 lnb->lnb_guard_disk = 0;
701 LASSERTF(plen <= len, "plen %u, len %lld\n", plen,
712 static struct page *osd_get_page(const struct lu_env *env, struct dt_object *dt,
713 loff_t offset, gfp_t gfp_mask, bool cache)
715 struct osd_thread_info *oti = osd_oti_get(env);
716 struct inode *inode = osd_dt_obj(dt)->oo_inode;
717 struct osd_device *d = osd_obj2dev(osd_dt_obj(dt));
724 page = find_or_create_page(inode->i_mapping,
725 offset >> PAGE_SHIFT, gfp_mask);
728 LASSERT(!PagePrivate2(page));
729 wait_on_page_writeback(page);
731 lprocfs_counter_add(d->od_stats, LPROC_OSD_NO_PAGE, 1);
737 if (inode->i_mapping->nrpages) {
738 /* consult with pagecache, but do not create new pages */
739 /* this is normally used once */
740 page = find_lock_page(inode->i_mapping, offset >> PAGE_SHIFT);
742 wait_on_page_writeback(page);
747 LASSERT(oti->oti_dio_pages);
748 cur = oti->oti_dio_pages_used;
749 page = oti->oti_dio_pages[cur];
751 if (unlikely(!page)) {
752 LASSERT(cur < PTLRPC_MAX_BRW_PAGES);
753 page = alloc_page(gfp_mask);
756 oti->oti_dio_pages[cur] = page;
757 SetPagePrivate2(page);
761 ClearPageUptodate(page);
762 page->index = offset >> PAGE_SHIFT;
763 oti->oti_dio_pages_used++;
769 * there are following "locks":
780 * - lock pages, unlock
782 * - lock partial page
788 * Unlock and release pages loaded by osd_bufs_get()
790 * Unlock \a npages pages from \a lnb and drop the refcount on them.
792 * \param env thread execution environment
793 * \param dt dt object undergoing IO (OSD object + methods)
794 * \param lnb array of pages undergoing IO
795 * \param npages number of pages in \a lnb
799 static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
800 struct niobuf_local *lnb, int npages)
802 struct osd_thread_info *oti = osd_oti_get(env);
806 ll_pagevec_init(&pvec, 0);
808 for (i = 0; i < npages; i++) {
809 struct page *page = lnb[i].lnb_page;
814 /* if the page isn't cached, then reset uptodate
817 if (PagePrivate2(page)) {
818 oti->oti_dio_pages_used--;
820 if (lnb[i].lnb_locked)
822 if (pagevec_add(&pvec, page) == 0)
823 pagevec_release(&pvec);
826 lnb[i].lnb_page = NULL;
829 LASSERTF(oti->oti_dio_pages_used == 0, "%d\n", oti->oti_dio_pages_used);
831 /* Release any partial pagevec */
832 pagevec_release(&pvec);
838 * Load and lock pages undergoing IO
840 * Pages as described in the \a lnb array are fetched (from disk or cache)
841 * and locked for IO by the caller.
843 * DLM locking protects us from write and truncate competing for same region,
844 * but partial-page truncate can leave dirty pages in the cache for ldiskfs.
845 * It's possible the writeout on a such a page is in progress when we access
846 * it. It's also possible that during this writeout we put new (partial) data
847 * into the page, but won't be able to proceed in filter_commitrw_write().
848 * Therefore, just wait for writeout completion as it should be rare enough.
850 * \param env thread execution environment
851 * \param dt dt object undergoing IO (OSD object + methods)
852 * \param pos byte offset of IO start
853 * \param len number of bytes of IO
854 * \param lnb array of extents undergoing IO
855 * \param rw read or write operation, and other flags
856 * \param capa capabilities
858 * \retval pages (zero or more) loaded successfully
859 * \retval -ENOMEM on memory/page allocation error
861 static int osd_bufs_get(const struct lu_env *env, struct dt_object *dt,
862 loff_t pos, ssize_t len, struct niobuf_local *lnb,
863 int maxlnb, enum dt_bufs_type rw)
865 struct osd_thread_info *oti = osd_oti_get(env);
866 struct osd_object *obj = osd_dt_obj(dt);
867 struct osd_device *osd = osd_obj2dev(obj);
868 int npages, i, iosize, rc = 0;
873 LASSERT(obj->oo_inode);
875 if (unlikely(obj->oo_destroyed))
878 rc = osd_map_remote_to_local(pos, len, &npages, lnb, maxlnb);
882 write = rw & DT_BUFS_TYPE_WRITE;
884 fsize = lnb[npages - 1].lnb_file_offset + lnb[npages - 1].lnb_len;
885 iosize = fsize - lnb[0].lnb_file_offset;
886 fsize = max(fsize, i_size_read(obj->oo_inode));
888 cache = rw & DT_BUFS_TYPE_READAHEAD;
892 cache = osd_use_page_cache(osd);
895 if (!osd->od_writethrough_cache) {
899 if (iosize > osd->od_writethrough_max_iosize) {
904 if (!osd->od_read_cache) {
908 if (iosize > osd->od_readcache_max_iosize) {
913 /* don't use cache on large files */
914 if (osd->od_readcache_max_filesize &&
915 fsize > osd->od_readcache_max_filesize)
921 if (!cache && unlikely(!oti->oti_dio_pages)) {
922 OBD_ALLOC_PTR_ARRAY_LARGE(oti->oti_dio_pages,
923 PTLRPC_MAX_BRW_PAGES);
924 if (!oti->oti_dio_pages)
928 /* this could also try less hard for DT_BUFS_TYPE_READAHEAD pages */
929 gfp_mask = rw & DT_BUFS_TYPE_LOCAL ? (GFP_NOFS | __GFP_HIGHMEM) :
931 for (i = 0; i < npages; i++, lnb++) {
932 lnb->lnb_page = osd_get_page(env, dt, lnb->lnb_file_offset,
934 if (lnb->lnb_page == NULL)
935 GOTO(cleanup, rc = -ENOMEM);
939 mark_page_accessed(lnb->lnb_page);
943 /* XXX: this version doesn't invalidate cached pages, but use them */
944 if (!cache && write && obj->oo_inode->i_mapping->nrpages) {
945 /* do not allow data aliasing, invalidate pagecache */
946 /* XXX: can be quite expensive in mixed case */
947 invalidate_mapping_pages(obj->oo_inode->i_mapping,
948 lnb[0].lnb_file_offset >> PAGE_SHIFT,
949 lnb[npages - 1].lnb_file_offset >> PAGE_SHIFT);
957 osd_bufs_put(env, dt, lnb - i, i);
960 /* Borrow @ext4_chunk_trans_blocks */
961 static int osd_chunk_trans_blocks(struct inode *inode, int nrblocks)
963 ldiskfs_group_t groups;
969 depth = ext_depth(inode);
970 idxblocks = depth * 2;
973 * Now let's see how many group bitmaps and group descriptors need
976 groups = idxblocks + 1;
978 if (groups > LDISKFS_SB(inode->i_sb)->s_groups_count)
979 groups = LDISKFS_SB(inode->i_sb)->s_groups_count;
980 if (gdpblocks > LDISKFS_SB(inode->i_sb)->s_gdb_count)
981 gdpblocks = LDISKFS_SB(inode->i_sb)->s_gdb_count;
983 /* bitmaps and block group descriptor blocks */
984 ret = idxblocks + groups + gdpblocks;
986 /* Blocks for super block, inode, quota and xattr blocks */
987 ret += LDISKFS_META_TRANS_BLOCKS(inode->i_sb);
992 #ifdef HAVE_LDISKFS_JOURNAL_ENSURE_CREDITS
993 static int osd_extend_restart_trans(handle_t *handle, int needed,
998 rc = ldiskfs_journal_ensure_credits(handle, needed,
999 ldiskfs_trans_default_revoke_credits(inode->i_sb));
1000 /* this means journal has been restarted */
1007 static int osd_extend_restart_trans(handle_t *handle, int needed,
1008 struct inode *inode)
1012 if (ldiskfs_handle_has_enough_credits(handle, needed))
1014 rc = ldiskfs_journal_extend(handle,
1015 needed - handle->h_buffer_credits);
1019 return ldiskfs_journal_restart(handle, needed);
1021 #endif /* HAVE_LDISKFS_JOURNAL_ENSURE_CREDITS */
1023 static int osd_ldiskfs_map_write(struct inode *inode, struct osd_iobuf *iobuf,
1024 struct osd_device *osd, sector_t start_blocks,
1025 sector_t count, loff_t *disk_size,
1028 /* if file has grown, take user_size into account */
1029 if (user_size && *disk_size > user_size)
1030 *disk_size = user_size;
1032 spin_lock(&inode->i_lock);
1033 if (*disk_size > i_size_read(inode)) {
1034 i_size_write(inode, *disk_size);
1035 LDISKFS_I(inode)->i_disksize = *disk_size;
1036 spin_unlock(&inode->i_lock);
1037 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
1039 spin_unlock(&inode->i_lock);
1043 * We don't do stats here as in read path because
1044 * write is async: we'll do this in osd_put_bufs()
1046 return osd_do_bio(osd, inode, iobuf, start_blocks, count);
1049 static unsigned int osd_extent_bytes(const struct osd_device *o)
1051 unsigned int *extent_bytes_ptr =
1052 raw_cpu_ptr(o->od_extent_bytes_percpu);
1054 if (likely(*extent_bytes_ptr))
1055 return *extent_bytes_ptr;
1057 /* initialize on first access or CPU hotplug */
1058 if (!ldiskfs_has_feature_extents(osd_sb(o)))
1059 *extent_bytes_ptr = 1 << osd_sb(o)->s_blocksize_bits;
1061 *extent_bytes_ptr = OSD_DEFAULT_EXTENT_BYTES;
1063 return *extent_bytes_ptr;
1066 #define EXTENT_BYTES_DECAY 64
1067 static void osd_decay_extent_bytes(struct osd_device *osd,
1068 unsigned int new_bytes)
1070 unsigned int old_bytes;
1072 if (!ldiskfs_has_feature_extents(osd_sb(osd)))
1075 old_bytes = osd_extent_bytes(osd);
1076 *raw_cpu_ptr(osd->od_extent_bytes_percpu) =
1077 (old_bytes * (EXTENT_BYTES_DECAY - 1) +
1078 min(new_bytes, OSD_DEFAULT_EXTENT_BYTES) +
1079 EXTENT_BYTES_DECAY - 1) / EXTENT_BYTES_DECAY;
1082 static int osd_ldiskfs_map_inode_pages(struct inode *inode,
1083 struct osd_iobuf *iobuf,
1084 struct osd_device *osd,
1085 int create, __u64 user_size,
1087 struct thandle *thandle)
1089 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
1090 int blocksize = 1 << inode->i_blkbits;
1091 int rc = 0, i = 0, mapped_index = 0;
1092 struct page *fp = NULL;
1094 pgoff_t max_page_index;
1095 handle_t *handle = NULL;
1096 sector_t start_blocks = 0, count = 0;
1097 loff_t disk_size = 0;
1098 struct page **page = iobuf->dr_pages;
1099 int pages = iobuf->dr_npages;
1100 sector_t *blocks = iobuf->dr_blocks;
1101 struct niobuf_local *lnb1, *lnb2;
1102 loff_t size1, size2;
1104 max_page_index = inode->i_sb->s_maxbytes >> PAGE_SHIFT;
1106 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1107 inode->i_ino, pages, (*page)->index);
1110 create = LDISKFS_GET_BLOCKS_CREATE;
1111 handle = ldiskfs_journal_current_handle();
1112 LASSERT(handle != NULL);
1113 rc = osd_attach_jinode(inode);
1116 disk_size = i_size_read(inode);
1117 /* if disk_size is already bigger than specified user_size,
1120 if (disk_size > user_size)
1123 /* pages are sorted already. so, we just have to find
1124 * contig. space and process them properly
1127 long blen, total = 0, previous_total = 0;
1128 struct ldiskfs_map_blocks map = { 0 };
1130 if (fp == NULL) { /* start new extent */
1135 } else if (fp->index + clen == (*page)->index) {
1136 /* continue the extent */
1142 if (fp->index + clen >= max_page_index)
1143 GOTO(cleanup, rc = -EFBIG);
1144 /* process found extent */
1145 map.m_lblk = fp->index * blocks_per_page;
1146 map.m_len = blen = clen * blocks_per_page;
1149 * For PAGE_SIZE > blocksize block allocation mapping, the
1150 * ldiskfs_map_blocks() aims at looking up already mapped
1151 * blocks, recording them to iobuf->dr_blocks and fixing up
1152 * m_lblk, m_len for un-allocated blocks to be created/mapped
1153 * in the second ldiskfs_map_blocks().
1155 * M_lblk should be the first un-allocated block if m_lblk
1156 * points at an already allocated block when create = 1,
1157 * ldiskfs_map_blocks() will just return with already
1158 * allocated blocks and without allocating any requested
1159 * new blocks for the extent. For PAGE_SIZE = blocksize
1160 * case, if m_lblk points at an already allocated block it
1161 * will point at an un-allocated block in next restart
1162 * transaction, because the already mapped block/page will
1163 * be filtered out in next restart transaction via flag
1164 * OBD_BRW_DONE in osd_declare_write_commit().
1166 if (create && PAGE_SIZE > blocksize) {
1167 /* With flags=0 just for already mapped blocks lookup */
1168 rc = ldiskfs_map_blocks(handle, inode, &map, 0);
1169 if (rc > 0 && map.m_flags & LDISKFS_MAP_MAPPED) {
1170 for (; total < blen && total < map.m_len;
1172 *(blocks + total) = map.m_pblk + total;
1174 /* The extent is already full mapped */
1175 if (total == blen) {
1177 goto ext_already_mapped;
1181 * Fixup or reset m_lblk and m_len for un-mapped blocks.
1182 * The second ldiskfs_map_blocks() will create and map
1185 map.m_lblk = fp->index * blocks_per_page + total;
1186 map.m_len = blen - total;
1191 * We might restart transaction for block allocations,
1192 * in order to make sure data ordered mode, issue IO, disk
1193 * size update and block allocations need be within same
1194 * transaction to make sure consistency.
1196 if (handle && check_credits) {
1197 struct osd_thandle *oh;
1199 LASSERT(thandle != NULL);
1200 oh = container_of(thandle, struct osd_thandle,
1203 * only issue IO if restart transaction needed,
1204 * as update disk size need hold inode lock, we
1205 * want to avoid that as much as possible.
1207 if (oh->oh_declared_ext <= 0) {
1208 rc = osd_ldiskfs_map_write(inode,
1209 iobuf, osd, start_blocks,
1210 count, &disk_size, user_size);
1213 thandle->th_restart_tran = 1;
1214 GOTO(cleanup, rc = -EAGAIN);
1217 if (OBD_FAIL_CHECK(OBD_FAIL_OST_RESTART_IO))
1218 oh->oh_declared_ext = 0;
1220 oh->oh_declared_ext--;
1222 rc = ldiskfs_map_blocks(handle, inode, &map, create);
1226 for (; total < blen && c < map.m_len; c++, total++) {
1228 *(blocks + total) = 0;
1232 if ((map.m_flags & LDISKFS_MAP_UNWRITTEN) &&
1234 /* don't try to read allocated, but
1235 * unwritten blocks, instead fill the
1236 * patches with zeros in osd_do_bio() */
1237 *(blocks + total) = 0;
1240 *(blocks + total) = map.m_pblk + c;
1241 /* unmap any possible underlying
1242 * metadata from the block device
1245 if ((map.m_flags & LDISKFS_MAP_NEW) &&
1247 clean_bdev_aliases(inode->i_sb->s_bdev,
1254 if (rc == 0 && create) {
1255 count += (total - previous_total);
1256 mapped_index = (count + blocks_per_page -
1257 1) / blocks_per_page - 1;
1258 lnb1 = iobuf->dr_lnbs[i - clen];
1259 lnb2 = iobuf->dr_lnbs[mapped_index];
1260 size1 = lnb1->lnb_file_offset -
1261 (lnb1->lnb_file_offset % PAGE_SIZE) +
1262 (total << inode->i_blkbits);
1263 size2 = lnb2->lnb_file_offset + lnb2->lnb_len;
1267 if (size1 > disk_size)
1271 if (rc == 0 && total < blen) {
1273 * decay extent blocks if we could not
1274 * allocate extent once.
1276 osd_decay_extent_bytes(osd,
1277 (total - previous_total) << inode->i_blkbits);
1278 map.m_lblk = fp->index * blocks_per_page + total;
1279 map.m_len = blen - total;
1280 previous_total = total;
1286 * decay extent blocks if we could allocate
1287 * good large extent.
1289 if (total - previous_total >=
1290 osd_extent_bytes(osd) >> inode->i_blkbits)
1291 osd_decay_extent_bytes(osd,
1292 (total - previous_total) << inode->i_blkbits);
1293 /* look for next extent */
1295 blocks += blocks_per_page * clen;
1298 if (rc == 0 && create &&
1299 start_blocks < pages * blocks_per_page) {
1300 rc = osd_ldiskfs_map_write(inode, iobuf, osd, start_blocks,
1301 count, &disk_size, user_size);
1302 LASSERT(start_blocks + count == pages * blocks_per_page);
1307 static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
1308 struct niobuf_local *lnb, int npages)
1310 struct osd_thread_info *oti = osd_oti_get(env);
1311 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1312 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1313 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1322 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1323 if (unlikely(rc != 0))
1326 isize = i_size_read(inode);
1327 maxidx = ((isize + PAGE_SIZE - 1) >> PAGE_SHIFT) - 1;
1329 start = ktime_get();
1330 for (i = 0; i < npages; i++) {
1333 * till commit the content of the page is undefined
1334 * we'll set it uptodate once bulk is done. otherwise
1335 * subsequent reads can access non-stable data
1337 ClearPageUptodate(lnb[i].lnb_page);
1339 if (lnb[i].lnb_len == PAGE_SIZE)
1342 if (maxidx >= lnb[i].lnb_page->index) {
1343 osd_iobuf_add_page(iobuf, &lnb[i]);
1346 char *p = kmap(lnb[i].lnb_page);
1348 off = lnb[i].lnb_page_offset;
1351 off = (lnb[i].lnb_page_offset + lnb[i].lnb_len) &
1354 memset(p + off, 0, PAGE_SIZE - off);
1355 kunmap(lnb[i].lnb_page);
1359 timediff = ktime_us_delta(end, start);
1360 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1362 if (iobuf->dr_npages) {
1363 rc = osd_ldiskfs_map_inode_pages(inode, iobuf, osd, 0,
1365 if (likely(rc == 0)) {
1366 rc = osd_do_bio(osd, inode, iobuf, 0, 0);
1367 /* do IO stats for preparation reads */
1368 osd_fini_iobuf(osd, iobuf);
1374 struct osd_fextent {
1378 unsigned int mapped:1;
1381 static int osd_is_mapped(struct dt_object *dt, __u64 offset,
1382 struct osd_fextent *cached_extent)
1384 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1385 sector_t block = offset >> inode->i_blkbits;
1387 struct fiemap_extent_info fei = { 0 };
1388 struct fiemap_extent fe = { 0 };
1391 if (block >= cached_extent->start && block < cached_extent->end)
1392 return cached_extent->mapped;
1394 if (i_size_read(inode) == 0)
1397 /* Beyond EOF, must not be mapped */
1398 if (((i_size_read(inode) - 1) >> inode->i_blkbits) < block)
1401 fei.fi_extents_max = 1;
1402 fei.fi_extents_start = &fe;
1404 rc = inode->i_op->fiemap(inode, &fei, offset, FIEMAP_MAX_OFFSET-offset);
1408 start = fe.fe_logical >> inode->i_blkbits;
1409 cached_extent->flags = fe.fe_flags;
1410 if (fei.fi_extents_mapped == 0) {
1411 /* a special case - no extent found at this offset and forward.
1412 * we can consider this as a hole to EOF. it's safe to cache
1413 * as other threads can not allocate/punch blocks this thread
1414 * is working on (LDLM). */
1415 cached_extent->start = block;
1416 cached_extent->end = i_size_read(inode) >> inode->i_blkbits;
1417 cached_extent->mapped = 0;
1421 if (start > block) {
1422 cached_extent->start = block;
1423 cached_extent->end = start;
1424 cached_extent->mapped = 0;
1426 cached_extent->start = start;
1427 cached_extent->end = (fe.fe_logical + fe.fe_length) >>
1429 cached_extent->mapped = 1;
1432 return cached_extent->mapped;
1435 #define MAX_EXTENTS_PER_WRITE 100
1436 static int osd_declare_write_commit(const struct lu_env *env,
1437 struct dt_object *dt,
1438 struct niobuf_local *lnb, int npages,
1439 struct thandle *handle)
1441 const struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1442 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1443 struct osd_thandle *oh;
1444 int extents = 0, new_meta = 0;
1445 int depth, new_blocks = 0;
1447 int dirty_groups = 0;
1450 long long quota_space = 0;
1451 struct osd_fextent mapped = { 0 }, extent = { 0 };
1452 enum osd_quota_local_flags local_flags = 0;
1453 enum osd_qid_declare_flags declare_flags = OSD_QID_BLK;
1454 unsigned int extent_bytes;
1457 LASSERT(handle != NULL);
1458 oh = container_of(handle, struct osd_thandle, ot_super);
1459 LASSERT(oh->ot_handle == NULL);
1462 * We track a decaying average extent blocks per filesystem,
1463 * for most of time, it will be 1M, with filesystem becoming
1464 * heavily-fragmented, it will be reduced to 4K at the worst.
1466 extent_bytes = osd_extent_bytes(osd);
1467 LASSERT(extent_bytes >= osd_sb(osd)->s_blocksize);
1469 /* calculate number of extents (probably better to pass nb) */
1470 for (i = 0; i < npages; i++) {
1471 /* ignore quota for the whole request if any page is from
1472 * client cache or written by root.
1474 * XXX we could handle this on per-lnb basis as done by
1477 if ((lnb[i].lnb_flags & OBD_BRW_NOQUOTA) ||
1478 (lnb[i].lnb_flags & OBD_BRW_SYS_RESOURCE) ||
1479 !(lnb[i].lnb_flags & OBD_BRW_SYNC))
1480 declare_flags |= OSD_QID_FORCE;
1483 * Convert unwritten extent might need split extents, could
1486 if (osd_is_mapped(dt, lnb[i].lnb_file_offset, &mapped) &&
1487 !(mapped.flags & FIEMAP_EXTENT_UNWRITTEN)) {
1488 lnb[i].lnb_flags |= OBD_BRW_MAPPED;
1492 if (lnb[i].lnb_flags & OBD_BRW_DONE) {
1493 lnb[i].lnb_flags |= OBD_BRW_MAPPED;
1497 /* count only unmapped changes */
1499 if (lnb[i].lnb_file_offset != extent.end || extent.end == 0) {
1500 if (extent.end != 0)
1501 extents += (extent.end - extent.start +
1502 extent_bytes - 1) / extent_bytes;
1503 extent.start = lnb[i].lnb_file_offset;
1504 extent.end = lnb[i].lnb_file_offset + lnb[i].lnb_len;
1506 extent.end += lnb[i].lnb_len;
1509 quota_space += PAGE_SIZE;
1512 credits++; /* inode */
1514 * overwrite case, no need to modify tree and
1520 extents += (extent.end - extent.start +
1521 extent_bytes - 1) / extent_bytes;
1523 * with system space usage growing up, mballoc codes won't
1524 * try best to scan block group to align best free extent as
1525 * we can. So extent bytes per extent could be decayed to a
1526 * very small value, this could make us reserve too many credits.
1527 * We could be more optimistic in the credit reservations, even
1528 * in a case where the filesystem is nearly full, it is extremely
1529 * unlikely that the worst case would ever be hit.
1531 if (extents > MAX_EXTENTS_PER_WRITE)
1532 extents = MAX_EXTENTS_PER_WRITE;
1535 * If we add a single extent, then in the worse case, each tree
1536 * level index/leaf need to be changed in case of the tree split.
1537 * If more extents are inserted, they could cause the whole tree
1538 * split more than once, but this is really rare.
1540 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
1542 * many concurrent threads may grow tree by the time
1543 * our transaction starts. so, consider 2 is a min depth.
1545 depth = ext_depth(inode);
1546 depth = min(max(depth, 1) + 1, LDISKFS_MAX_EXTENT_DEPTH);
1548 credits += depth * 2 * extents;
1551 credits += depth * 3 * extents;
1552 new_meta = depth * 2 * extents;
1556 * With N contiguous data blocks, we need at most
1557 * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1 indirect blocks,
1558 * 2 dindirect blocks, and 1 tindirect block
1560 new_meta = DIV_ROUND_UP(new_blocks,
1561 LDISKFS_ADDR_PER_BLOCK(inode->i_sb)) + 4;
1562 credits += new_meta;
1564 dirty_groups += (extents + new_meta);
1566 oh->oh_declared_ext = extents;
1568 /* quota space for metadata blocks */
1569 quota_space += new_meta * LDISKFS_BLOCK_SIZE(osd_sb(osd));
1571 /* quota space should be reported in 1K blocks */
1572 quota_space = toqb(quota_space);
1574 /* each new block can go in different group (bitmap + gd) */
1576 /* we can't dirty more bitmap blocks than exist */
1577 if (dirty_groups > LDISKFS_SB(osd_sb(osd))->s_groups_count)
1578 credits += LDISKFS_SB(osd_sb(osd))->s_groups_count;
1580 credits += dirty_groups;
1582 /* we can't dirty more gd blocks than exist */
1583 if (dirty_groups > LDISKFS_SB(osd_sb(osd))->s_gdb_count)
1584 credits += LDISKFS_SB(osd_sb(osd))->s_gdb_count;
1586 credits += dirty_groups;
1589 "%s: inode #%lu extent_bytes %u extents %d credits %d\n",
1590 osd_ino2name(inode), inode->i_ino, extent_bytes, extents,
1594 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
1596 /* make sure the over quota flags were not set */
1597 lnb[0].lnb_flags &= ~OBD_BRW_OVER_ALLQUOTA;
1599 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1600 i_projid_read(inode), quota_space, oh,
1601 osd_dt_obj(dt), &local_flags, declare_flags);
1603 /* we need only to store the overquota flags in the first lnb for
1604 * now, once we support multiple objects BRW, this code needs be
1607 if (local_flags & QUOTA_FL_OVER_USRQUOTA)
1608 lnb[0].lnb_flags |= OBD_BRW_OVER_USRQUOTA;
1609 if (local_flags & QUOTA_FL_OVER_GRPQUOTA)
1610 lnb[0].lnb_flags |= OBD_BRW_OVER_GRPQUOTA;
1611 if (local_flags & QUOTA_FL_OVER_PRJQUOTA)
1612 lnb[0].lnb_flags |= OBD_BRW_OVER_PRJQUOTA;
1615 rc = osd_trunc_lock(osd_dt_obj(dt), oh, true);
1620 /* Check if a block is allocated or not */
1621 static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
1622 struct niobuf_local *lnb, int npages,
1623 struct thandle *thandle, __u64 user_size)
1625 struct osd_thread_info *oti = osd_oti_get(env);
1626 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1627 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1628 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1629 int rc = 0, i, check_credits = 0;
1633 rc = osd_init_iobuf(osd, iobuf, 1, npages);
1634 if (unlikely(rc != 0))
1637 dquot_initialize(inode);
1639 for (i = 0; i < npages; i++) {
1640 if (lnb[i].lnb_rc == -ENOSPC &&
1641 (lnb[i].lnb_flags & OBD_BRW_MAPPED)) {
1642 /* Allow the write to proceed if overwriting an
1648 if (lnb[i].lnb_rc) { /* ENOSPC, network RPC error, etc. */
1649 CDEBUG(D_INODE, "Skipping [%d] == %d\n", i,
1651 LASSERT(lnb[i].lnb_page);
1652 generic_error_remove_page(inode->i_mapping,
1657 if (lnb[i].lnb_flags & OBD_BRW_DONE)
1660 if (!(lnb[i].lnb_flags & OBD_BRW_MAPPED))
1663 LASSERT(PageLocked(lnb[i].lnb_page));
1664 LASSERT(!PageWriteback(lnb[i].lnb_page));
1667 * Since write and truncate are serialized by oo_sem, even
1668 * partial-page truncate should not leave dirty pages in the
1671 LASSERT(!PageDirty(lnb[i].lnb_page));
1673 SetPageUptodate(lnb[i].lnb_page);
1675 osd_iobuf_add_page(iobuf, &lnb[i]);
1678 osd_trans_exec_op(env, thandle, OSD_OT_WRITE);
1680 if (OBD_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC)) {
1682 } else if (iobuf->dr_npages > 0) {
1683 rc = osd_ldiskfs_map_inode_pages(inode, iobuf, osd,
1688 /* no pages to write, no transno is needed */
1689 thandle->th_local = 1;
1692 if (rc != 0 && !thandle->th_restart_tran)
1693 osd_fini_iobuf(osd, iobuf);
1695 osd_trans_exec_check(env, thandle, OSD_OT_WRITE);
1697 if (unlikely(rc != 0 && !thandle->th_restart_tran)) {
1698 /* if write fails, we should drop pages from the cache */
1699 for (i = 0; i < npages; i++) {
1700 if (lnb[i].lnb_page == NULL)
1702 if (!PagePrivate2(lnb[i].lnb_page)) {
1703 LASSERT(PageLocked(lnb[i].lnb_page));
1704 generic_error_remove_page(inode->i_mapping,
1713 static int osd_read_prep(const struct lu_env *env, struct dt_object *dt,
1714 struct niobuf_local *lnb, int npages)
1716 struct osd_thread_info *oti = osd_oti_get(env);
1717 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1718 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1719 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1720 int rc = 0, i, cache_hits = 0, cache_misses = 0;
1727 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1728 if (unlikely(rc != 0))
1731 isize = i_size_read(inode);
1733 start = ktime_get();
1734 for (i = 0; i < npages; i++) {
1736 if (isize <= lnb[i].lnb_file_offset)
1737 /* If there's no more data, abort early.
1738 * lnb->lnb_rc == 0, so it's easy to detect later.
1742 /* instead of looking if we go beyong isize, send complete
1743 * pages all the time
1745 lnb[i].lnb_rc = lnb[i].lnb_len;
1747 /* Bypass disk read if fail_loc is set properly */
1748 if (OBD_FAIL_CHECK_QUIET(OBD_FAIL_OST_FAKE_RW))
1749 SetPageUptodate(lnb[i].lnb_page);
1751 if (PageUptodate(lnb[i].lnb_page)) {
1753 unlock_page(lnb[i].lnb_page);
1756 osd_iobuf_add_page(iobuf, &lnb[i]);
1758 /* no need to unlock in osd_bufs_put(), the sooner page is
1759 * unlocked, the earlier another client can access it.
1760 * notice real unlock_page() can be called few lines
1761 * below after osd_do_bio(). lnb is a per-thread, so it's
1762 * fine to have PG_locked and lnb_locked inconsistent here
1764 lnb[i].lnb_locked = 0;
1767 timediff = ktime_us_delta(end, start);
1768 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1770 if (cache_hits != 0)
1771 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_HIT,
1773 if (cache_misses != 0)
1774 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_MISS,
1776 if (cache_hits + cache_misses != 0)
1777 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
1778 cache_hits + cache_misses);
1780 if (iobuf->dr_npages) {
1781 rc = osd_ldiskfs_map_inode_pages(inode, iobuf, osd, 0,
1784 rc = osd_do_bio(osd, inode, iobuf, 0, 0);
1786 /* IO stats will be done in osd_bufs_put() */
1788 /* early release to let others read data during the bulk */
1789 for (i = 0; i < iobuf->dr_npages; i++) {
1790 LASSERT(PageLocked(iobuf->dr_pages[i]));
1791 if (!PagePrivate2(iobuf->dr_pages[i]))
1792 unlock_page(iobuf->dr_pages[i]);
1800 * XXX: Another layering violation for now.
1802 * We don't want to use ->f_op->read methods, because generic file write
1804 * - serializes on ->i_sem, and
1806 * - does a lot of extra work like balance_dirty_pages(),
1808 * which doesn't work for globally shared files like /last_rcvd.
1810 static int osd_ldiskfs_readlink(struct inode *inode, char *buffer, int buflen)
1812 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
1814 memcpy(buffer, (char *)ei->i_data, buflen);
1819 int osd_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs)
1821 struct buffer_head *bh;
1822 unsigned long block;
1828 /* prevent reading after eof */
1829 spin_lock(&inode->i_lock);
1830 if (i_size_read(inode) < *offs + size) {
1831 loff_t diff = i_size_read(inode) - *offs;
1833 spin_unlock(&inode->i_lock);
1836 "size %llu is too short to read @%llu\n",
1837 i_size_read(inode), *offs);
1839 } else if (diff == 0) {
1845 spin_unlock(&inode->i_lock);
1848 blocksize = 1 << inode->i_blkbits;
1851 block = *offs >> inode->i_blkbits;
1852 boffs = *offs & (blocksize - 1);
1853 csize = min(blocksize - boffs, size);
1854 bh = __ldiskfs_bread(NULL, inode, block, 0);
1856 CERROR("%s: can't read %u@%llu on ino %lu: rc = %ld\n",
1857 osd_ino2name(inode), csize, *offs, inode->i_ino,
1863 memcpy(buf, bh->b_data + boffs, csize);
1866 memset(buf, 0, csize);
1876 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
1877 struct lu_buf *buf, loff_t *pos)
1879 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1882 /* Read small symlink from inode body as we need to maintain correct
1883 * on-disk symlinks for ldiskfs.
1885 if (S_ISLNK(dt->do_lu.lo_header->loh_attr)) {
1886 loff_t size = i_size_read(inode);
1888 if (buf->lb_len < size)
1891 if (size < sizeof(LDISKFS_I(inode)->i_data))
1892 rc = osd_ldiskfs_readlink(inode, buf->lb_buf, size);
1894 rc = osd_ldiskfs_read(inode, buf->lb_buf, size, pos);
1896 rc = osd_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
1902 static inline int osd_extents_enabled(struct super_block *sb,
1903 struct inode *inode)
1905 if (inode != NULL) {
1906 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL)
1908 } else if (ldiskfs_has_feature_extents(sb)) {
1914 int osd_calc_bkmap_credits(struct super_block *sb, struct inode *inode,
1915 const loff_t size, const loff_t pos,
1918 int credits, bits, bs, i;
1920 bits = sb->s_blocksize_bits;
1923 /* legacy blockmap: 3 levels * 3 (bitmap,gd,itself)
1924 * we do not expect blockmaps on the large files,
1925 * so let's shrink it to 2 levels (4GB files)
1928 /* this is default reservation: 2 levels */
1929 credits = (blocks + 2) * 3;
1931 /* actual offset is unknown, hard to optimize */
1935 /* now check for few specific cases to optimize */
1936 if (pos + size <= LDISKFS_NDIR_BLOCKS * bs) {
1939 /* allocate if not allocated */
1940 if (inode == NULL) {
1941 credits += blocks * 2;
1944 for (i = (pos >> bits); i < (pos >> bits) + blocks; i++) {
1945 LASSERT(i < LDISKFS_NDIR_BLOCKS);
1946 if (LDISKFS_I(inode)->i_data[i] == 0)
1949 } else if (pos + size <= (LDISKFS_NDIR_BLOCKS + 1024) * bs) {
1950 /* single indirect */
1951 credits = blocks * 3;
1952 if (inode == NULL ||
1953 LDISKFS_I(inode)->i_data[LDISKFS_IND_BLOCK] == 0)
1956 /* The indirect block may be modified. */
1963 static ssize_t osd_declare_write(const struct lu_env *env, struct dt_object *dt,
1964 const struct lu_buf *buf, loff_t _pos,
1965 struct thandle *handle)
1967 struct osd_object *obj = osd_dt_obj(dt);
1968 struct inode *inode = obj->oo_inode;
1969 struct super_block *sb = osd_sb(osd_obj2dev(obj));
1970 struct osd_thandle *oh;
1971 int rc = 0, est = 0, credits, blocks, allocated = 0;
1977 LASSERT(buf != NULL);
1978 LASSERT(handle != NULL);
1980 oh = container_of(handle, struct osd_thandle, ot_super);
1981 LASSERT(oh->ot_handle == NULL);
1984 bits = sb->s_blocksize_bits;
1988 /* if this is an append, then we
1989 * should expect cross-block record
1996 /* blocks to modify */
1997 blocks = ((pos + size + bs - 1) >> bits) - (pos >> bits);
1998 LASSERT(blocks > 0);
2000 if (inode != NULL && _pos != -1) {
2001 /* object size in blocks */
2002 est = (i_size_read(inode) + bs - 1) >> bits;
2003 allocated = inode->i_blocks >> (bits - 9);
2004 if (pos + size <= i_size_read(inode) && est <= allocated) {
2005 /* looks like an overwrite, no need to modify tree */
2007 /* no need to modify i_size */
2012 if (osd_extents_enabled(sb, inode)) {
2014 * many concurrent threads may grow tree by the time
2015 * our transaction starts. so, consider 2 is a min depth
2016 * for every level we may need to allocate a new block
2017 * and take some entries from the old one. so, 3 blocks
2018 * to allocate (bitmap, gd, itself) + old block - 4 per
2021 depth = inode != NULL ? ext_depth(inode) : 0;
2022 depth = min(max(depth, 1) + 3, LDISKFS_MAX_EXTENT_DEPTH);
2024 /* if not append, then split may need to modify
2025 * existing blocks moving entries into the new ones
2029 /* blocks to store data: bitmap,gd,itself */
2030 credits += blocks * 3;
2032 credits = osd_calc_bkmap_credits(sb, inode, size, _pos, blocks);
2034 /* if inode is created as part of the transaction,
2035 * then it's counted already by the creation method
2042 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
2044 /* dt_declare_write() is usually called for system objects, such
2045 * as llog or last_rcvd files. We needn't enforce quota on those
2046 * objects, so always set the lqi_space as 0.
2049 rc = osd_declare_inode_qid(env, i_uid_read(inode),
2051 i_projid_read(inode), 0,
2052 oh, obj, NULL, OSD_QID_BLK);
2055 rc = osd_trunc_lock(obj, oh, true);
2060 static int osd_ldiskfs_writelink(struct inode *inode, char *buffer, int buflen)
2062 /* LU-2634: clear the extent format for fast symlink */
2063 ldiskfs_clear_inode_flag(inode, LDISKFS_INODE_EXTENTS);
2065 /* Copying the NUL byte terminating the link target as well */
2066 memcpy((char *)&LDISKFS_I(inode)->i_data, (char *)buffer, buflen + 1);
2067 spin_lock(&inode->i_lock);
2068 LDISKFS_I(inode)->i_disksize = buflen;
2069 i_size_write(inode, buflen);
2070 spin_unlock(&inode->i_lock);
2071 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
2076 static int osd_ldiskfs_write_record(struct dt_object *dt, void *buf,
2077 int bufsize, int write_NUL, loff_t *offs,
2080 struct inode *inode = osd_dt_obj(dt)->oo_inode;
2081 struct buffer_head *bh = NULL;
2082 loff_t offset = *offs;
2083 loff_t new_size = i_size_read(inode);
2084 unsigned long block;
2085 int blocksize = 1 << inode->i_blkbits;
2086 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
2090 int dirty_inode = 0;
2091 bool create, sparse, sync = false;
2095 * long symlink write does not count the NUL terminator in
2096 * bufsize, we write it, and the inode's file size does not
2097 * count the NUL terminator as well.
2099 ((char *)buf)[bufsize] = '\0';
2103 /* only the first flag-set matters */
2104 dirty_inode = !test_and_set_bit(LDISKFS_INODE_JOURNAL_DATA,
2107 /* sparse checking is racy, but sparse is very rare case, leave as is */
2108 sparse = (new_size > 0 && (inode->i_blocks >> (inode->i_blkbits - 9)) <
2109 ((new_size - 1) >> inode->i_blkbits) + 1);
2111 while (bufsize > 0) {
2112 int credits = handle->h_buffer_credits;
2113 unsigned long last_block = (new_size == 0) ? 0 :
2114 (new_size - 1) >> inode->i_blkbits;
2119 block = offset >> inode->i_blkbits;
2120 boffs = offset & (blocksize - 1);
2121 size = min(blocksize - boffs, bufsize);
2122 sync = (block > last_block || new_size == 0 || sparse);
2125 down(&ei->i_append_sem);
2127 bh = __ldiskfs_bread(handle, inode, block, 0);
2129 if (unlikely(IS_ERR_OR_NULL(bh) && !sync))
2131 "%s: adding bh without locking off %llu (block %lu, size %d, offs %llu)\n",
2132 osd_ino2name(inode),
2133 offset, block, bufsize, *offs);
2135 if (IS_ERR_OR_NULL(bh)) {
2136 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
2137 int flags = LDISKFS_GET_BLOCKS_CREATE;
2139 /* while the file system is being mounted, avoid
2140 * preallocation otherwise mount can take a long
2141 * time as mballoc cache is cold.
2142 * XXX: this is a workaround until we have a proper
2144 * XXX: works with extent-based files only */
2145 if (!osd->od_cl_seq)
2146 flags |= LDISKFS_GET_BLOCKS_NO_NORMALIZE;
2147 bh = __ldiskfs_bread(handle, inode, block, flags);
2151 up(&ei->i_append_sem);
2156 if (IS_ERR_OR_NULL(bh)) {
2165 "%s: error reading offset %llu (block %lu, size %d, offs %llu), credits %d/%d: rc = %d\n",
2166 osd_ino2name(inode), offset, block, bufsize,
2167 *offs, credits, handle->h_buffer_credits, err);
2171 err = ldiskfs_journal_get_write_access(handle, bh);
2173 CERROR("journal_get_write_access() returned error %d\n",
2177 LASSERTF(boffs + size <= bh->b_size,
2178 "boffs %d size %d bh->b_size %lu\n",
2179 boffs, size, (unsigned long)bh->b_size);
2181 memset(bh->b_data, 0, bh->b_size);
2183 up(&ei->i_append_sem);
2187 memcpy(bh->b_data + boffs, buf, size);
2188 err = ldiskfs_handle_dirty_metadata(handle, NULL, bh);
2192 if (offset + size > new_size)
2193 new_size = offset + size;
2199 up(&ei->i_append_sem);
2206 /* correct in-core and on-disk sizes */
2207 if (new_size > i_size_read(inode)) {
2208 spin_lock(&inode->i_lock);
2209 if (new_size > i_size_read(inode))
2210 i_size_write(inode, new_size);
2211 if (i_size_read(inode) > ei->i_disksize) {
2212 ei->i_disksize = i_size_read(inode);
2215 spin_unlock(&inode->i_lock);
2218 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
2225 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
2226 const struct lu_buf *buf, loff_t *pos,
2227 struct thandle *handle)
2229 struct inode *inode = osd_dt_obj(dt)->oo_inode;
2230 struct osd_thandle *oh;
2234 LASSERT(dt_object_exists(dt));
2236 LASSERT(handle != NULL);
2237 LASSERT(inode != NULL);
2238 dquot_initialize(inode);
2240 /* XXX: don't check: one declared chunk can be used many times */
2241 /* osd_trans_exec_op(env, handle, OSD_OT_WRITE); */
2243 oh = container_of(handle, struct osd_thandle, ot_super);
2244 LASSERT(oh->ot_handle->h_transaction != NULL);
2245 osd_trans_exec_op(env, handle, OSD_OT_WRITE);
2247 /* Write small symlink to inode body as we need to maintain correct
2248 * on-disk symlinks for ldiskfs.
2249 * Note: the buf->lb_buf contains a NUL terminator while buf->lb_len
2250 * does not count it in.
2252 is_link = S_ISLNK(dt->do_lu.lo_header->loh_attr);
2253 if (is_link && (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
2254 result = osd_ldiskfs_writelink(inode, buf->lb_buf, buf->lb_len);
2256 result = osd_ldiskfs_write_record(dt, buf->lb_buf, buf->lb_len,
2257 is_link, pos, oh->ot_handle);
2259 result = buf->lb_len;
2261 osd_trans_exec_check(env, handle, OSD_OT_WRITE);
2266 static int osd_declare_fallocate(const struct lu_env *env,
2267 struct dt_object *dt, __u64 start, __u64 end,
2268 int mode, struct thandle *th)
2270 struct osd_thandle *oh = container_of(th, struct osd_thandle, ot_super);
2271 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
2272 struct inode *inode = osd_dt_obj(dt)->oo_inode;
2273 long long quota_space = 0;
2274 /* 5 is max tree depth. (inode + 4 index blocks) */
2281 * mode == 0 (which is standard prealloc) and PUNCH is supported
2282 * Rest of mode options is not supported yet.
2284 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2285 RETURN(-EOPNOTSUPP);
2287 /* disable fallocate completely */
2288 if (osd_dev(dt->do_lu.lo_dev)->od_fallocate_zero_blocks < 0)
2289 RETURN(-EOPNOTSUPP);
2294 if (mode & FALLOC_FL_PUNCH_HOLE) {
2295 rc = osd_declare_inode_qid(env, i_uid_read(inode),
2297 i_projid_read(inode), 0, oh,
2298 osd_dt_obj(dt), NULL, OSD_QID_BLK);
2300 rc = osd_trunc_lock(osd_dt_obj(dt), oh, false);
2304 /* quota space for metadata blocks
2305 * approximate metadata estimate should be good enough.
2307 quota_space += PAGE_SIZE;
2308 quota_space += depth * LDISKFS_BLOCK_SIZE(osd_sb(osd));
2310 /* quota space should be reported in 1K blocks */
2311 quota_space = toqb(quota_space) + toqb(end - start) +
2312 LDISKFS_META_TRANS_BLOCKS(inode->i_sb);
2314 /* We don't need to reserve credits for whole fallocate here.
2315 * We reserve space only for metadata. Fallocate credits are
2316 * extended as required
2318 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2319 i_projid_read(inode), quota_space, oh,
2320 osd_dt_obj(dt), NULL, OSD_QID_BLK);
2324 static int osd_fallocate_preallocate(const struct lu_env *env,
2325 struct dt_object *dt,
2326 __u64 start, __u64 end, int mode,
2329 struct osd_thandle *oh = container_of(th, struct osd_thandle, ot_super);
2330 handle_t *handle = ldiskfs_journal_current_handle();
2331 unsigned int save_credits = oh->ot_credits;
2332 struct osd_object *obj = osd_dt_obj(dt);
2333 struct inode *inode = obj->oo_inode;
2334 struct ldiskfs_map_blocks map;
2335 unsigned int credits;
2336 ldiskfs_lblk_t blen;
2337 ldiskfs_lblk_t boff;
2338 loff_t new_size = 0;
2345 LASSERT(dt_object_exists(dt));
2346 LASSERT(osd_invariant(obj));
2347 LASSERT(inode != NULL);
2349 CDEBUG(D_INODE, "fallocate: inode #%lu: start %llu end %llu mode %d\n",
2350 inode->i_ino, start, end, mode);
2352 dquot_initialize(inode);
2356 boff = start >> inode->i_blkbits;
2357 blen = (ALIGN(end, 1 << inode->i_blkbits) >> inode->i_blkbits) - boff;
2359 /* Create and mark new extents as either zero or unwritten */
2360 flags = (osd_dev(dt->do_lu.lo_dev)->od_fallocate_zero_blocks ||
2361 !ldiskfs_test_inode_flag(inode, LDISKFS_INODE_EXTENTS)) ?
2362 LDISKFS_GET_BLOCKS_CREATE_ZERO :
2363 LDISKFS_GET_BLOCKS_CREATE_UNWRIT_EXT;
2364 #ifndef HAVE_LDISKFS_GET_BLOCKS_KEEP_SIZE
2365 if (mode & FALLOC_FL_KEEP_SIZE)
2366 flags |= LDISKFS_GET_BLOCKS_KEEP_SIZE;
2370 if (!(mode & FALLOC_FL_KEEP_SIZE) && (end > i_size_read(inode) ||
2371 end > LDISKFS_I(inode)->i_disksize)) {
2373 rc = inode_newsize_ok(inode, new_size);
2378 inode_dio_wait(inode);
2383 /* Don't normalize the request if it can fit in one extent so
2384 * that it doesn't get unnecessarily split into multiple extents.
2386 if (blen <= EXT_UNWRITTEN_MAX_LEN)
2387 flags |= LDISKFS_GET_BLOCKS_NO_NORMALIZE;
2390 * credits to insert 1 extent into extent tree.
2392 credits = osd_chunk_trans_blocks(inode, blen);
2393 depth = ext_depth(inode);
2395 while (rc >= 0 && blen) {
2399 * Recalculate credits when extent tree depth changes.
2401 if (depth != ext_depth(inode)) {
2402 credits = osd_chunk_trans_blocks(inode, blen);
2403 depth = ext_depth(inode);
2406 /* TODO: quota check */
2407 rc = osd_extend_restart_trans(handle, credits, inode);
2411 rc = ldiskfs_map_blocks(handle, inode, &map, flags);
2414 "inode #%lu: block %u: len %u: ldiskfs_map_blocks returned %d\n",
2415 inode->i_ino, map.m_lblk, map.m_len, rc);
2416 ldiskfs_mark_inode_dirty(handle, inode);
2421 map.m_len = blen = blen - rc;
2422 epos = (loff_t)map.m_lblk << inode->i_blkbits;
2423 inode->i_ctime = current_time(inode);
2427 if (ldiskfs_update_inode_size(inode, epos) & 0x1)
2428 inode->i_mtime = inode->i_ctime;
2429 #ifndef HAVE_LDISKFS_GET_BLOCKS_KEEP_SIZE
2431 if (epos > inode->i_size)
2432 ldiskfs_set_inode_flag(inode,
2433 LDISKFS_INODE_EOFBLOCKS);
2437 ldiskfs_mark_inode_dirty(handle, inode);
2441 /* extand credits if needed for operations such as attribute set */
2443 rc = osd_extend_restart_trans(handle, save_credits, inode);
2445 inode_unlock(inode);
2450 static int osd_fallocate_punch(const struct lu_env *env, struct dt_object *dt,
2451 __u64 start, __u64 end, int mode,
2454 struct osd_object *obj = osd_dt_obj(dt);
2455 struct inode *inode = obj->oo_inode;
2456 struct osd_access_lock *al;
2457 struct osd_thandle *oh;
2458 int rc = 0, found = 0;
2462 LASSERT(dt_object_exists(dt));
2463 LASSERT(osd_invariant(obj));
2464 LASSERT(inode != NULL);
2466 dquot_initialize(inode);
2469 oh = container_of(th, struct osd_thandle, ot_super);
2470 LASSERT(oh->ot_handle->h_transaction != NULL);
2472 list_for_each_entry(al, &oh->ot_trunc_locks, tl_list) {
2473 if (obj != al->tl_obj)
2475 LASSERT(al->tl_shared == 0);
2477 /* do actual punch in osd_trans_stop() */
2478 al->tl_start = start;
2481 al->tl_punch = true;
2488 static int osd_fallocate(const struct lu_env *env, struct dt_object *dt,
2489 __u64 start, __u64 end, int mode, struct thandle *th)
2495 if (mode & FALLOC_FL_PUNCH_HOLE) {
2497 rc = osd_fallocate_punch(env, dt, start, end, mode, th);
2499 /* standard preallocate */
2500 rc = osd_fallocate_preallocate(env, dt, start, end, mode, th);
2505 static int osd_declare_punch(const struct lu_env *env, struct dt_object *dt,
2506 __u64 start, __u64 end, struct thandle *th)
2508 struct osd_thandle *oh;
2509 struct inode *inode;
2514 oh = container_of(th, struct osd_thandle, ot_super);
2517 * we don't need to reserve credits for whole truncate
2518 * it's not possible as truncate may need to free too many
2519 * blocks and that won't fit a single transaction. instead
2520 * we reserve credits to change i_size and put inode onto
2521 * orphan list. if needed truncate will extend or restart
2524 osd_trans_declare_op(env, oh, OSD_OT_PUNCH,
2525 osd_dto_credits_noquota[DTO_ATTR_SET_BASE] + 3);
2527 inode = osd_dt_obj(dt)->oo_inode;
2530 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2531 i_projid_read(inode), 0, oh, osd_dt_obj(dt),
2535 rc = osd_trunc_lock(osd_dt_obj(dt), oh, false);
2540 static int osd_punch(const struct lu_env *env, struct dt_object *dt,
2541 __u64 start, __u64 end, struct thandle *th)
2543 struct osd_object *obj = osd_dt_obj(dt);
2544 struct osd_device *osd = osd_obj2dev(obj);
2545 struct inode *inode = obj->oo_inode;
2546 struct osd_access_lock *al;
2547 struct osd_thandle *oh;
2548 int rc = 0, found = 0;
2552 LASSERT(dt_object_exists(dt));
2553 LASSERT(osd_invariant(obj));
2554 LASSERT(inode != NULL);
2555 dquot_initialize(inode);
2558 oh = container_of(th, struct osd_thandle, ot_super);
2559 LASSERT(oh->ot_handle->h_transaction != NULL);
2561 /* we used to skip truncate to current size to
2562 * optimize truncates on OST. with DoM we can
2563 * get attr_set to set specific size (MDS_REINT)
2564 * and then get truncate RPC which essentially
2565 * would be skipped. this is bad.. so, disable
2566 * this optimization on MDS till the client stop
2567 * to sent MDS_REINT (LU-11033) -bzzz
2569 if (osd->od_is_ost && i_size_read(inode) == start)
2572 osd_trans_exec_op(env, th, OSD_OT_PUNCH);
2574 spin_lock(&inode->i_lock);
2575 if (i_size_read(inode) < start)
2577 i_size_write(inode, start);
2578 spin_unlock(&inode->i_lock);
2579 /* if object holds encrypted content, we need to make sure we truncate
2580 * on an encryption unit boundary, or subsequent reads will get
2583 if (obj->oo_lma_flags & LUSTRE_ENCRYPT_FL &&
2584 start & ~LUSTRE_ENCRYPTION_MASK)
2585 start = (start & LUSTRE_ENCRYPTION_MASK) +
2586 LUSTRE_ENCRYPTION_UNIT_SIZE;
2587 ll_truncate_pagecache(inode, start);
2589 /* optimize grow case */
2591 osd_execute_truncate(obj);
2596 /* add to orphan list to ensure truncate completion
2597 * if this transaction succeed. ldiskfs_truncate()
2598 * will take the inode out of the list
2600 rc = ldiskfs_orphan_add(oh->ot_handle, inode);
2601 inode_unlock(inode);
2605 list_for_each_entry(al, &oh->ot_trunc_locks, tl_list) {
2606 if (obj != al->tl_obj)
2608 LASSERT(al->tl_shared == 0);
2610 /* do actual truncate in osd_trans_stop() */
2611 al->tl_truncate = 1;
2620 static int fiemap_check_ranges(struct inode *inode,
2621 u64 start, u64 len, u64 *new_len)
2630 if (ldiskfs_test_inode_flag(inode, LDISKFS_INODE_EXTENTS))
2631 maxbytes = inode->i_sb->s_maxbytes;
2633 maxbytes = LDISKFS_SB(inode->i_sb)->s_bitmap_maxbytes;
2635 if (start > maxbytes)
2639 * Shrink request scope to what the fs can actually handle.
2641 if (len > maxbytes || (maxbytes - len) < start)
2642 *new_len = maxbytes - start;
2647 /* So that the fiemap access checks can't overflow on 32 bit machines. */
2648 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
2650 static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
2653 struct fiemap_extent_info fieinfo = {0, };
2654 struct inode *inode = osd_dt_obj(dt)->oo_inode;
2659 if (inode->i_op->fiemap == NULL)
2662 if (fm->fm_extent_count > FIEMAP_MAX_EXTENTS)
2665 rc = fiemap_check_ranges(inode, fm->fm_start, fm->fm_length, &len);
2669 fieinfo.fi_flags = fm->fm_flags;
2670 fieinfo.fi_extents_max = fm->fm_extent_count;
2671 fieinfo.fi_extents_start = fm->fm_extents;
2673 if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
2674 filemap_write_and_wait(inode->i_mapping);
2676 rc = inode->i_op->fiemap(inode, &fieinfo, fm->fm_start, len);
2677 fm->fm_flags = fieinfo.fi_flags;
2678 fm->fm_mapped_extents = fieinfo.fi_extents_mapped;
2683 static int osd_ladvise(const struct lu_env *env, struct dt_object *dt,
2684 __u64 start, __u64 end, enum lu_ladvise_type advice)
2686 struct osd_object *obj = osd_dt_obj(dt);
2691 case LU_LADVISE_DONTNEED:
2693 invalidate_mapping_pages(obj->oo_inode->i_mapping,
2694 start >> PAGE_SHIFT,
2695 (end - 1) >> PAGE_SHIFT);
2705 static loff_t osd_lseek(const struct lu_env *env, struct dt_object *dt,
2706 loff_t offset, int whence)
2708 struct osd_object *obj = osd_dt_obj(dt);
2709 struct osd_device *dev = osd_obj2dev(obj);
2710 struct inode *inode = obj->oo_inode;
2715 LASSERT(dt_object_exists(dt));
2716 LASSERT(osd_invariant(obj));
2718 LASSERT(offset >= 0);
2720 file = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
2723 RETURN(PTR_ERR(file));
2725 file->f_mode |= FMODE_64BITHASH;
2726 result = file->f_op->llseek(file, offset, whence);
2730 * If 'offset' is beyond end of object file then treat it as not error
2731 * but valid case for SEEK_HOLE and return 'offset' as result.
2732 * LOV will decide if it is beyond real end of file or not.
2734 if (whence == SEEK_HOLE && result == -ENXIO)
2737 CDEBUG(D_INFO, "seek %s from %lld: %lld\n", whence == SEEK_HOLE ?
2738 "hole" : "data", offset, result);
2743 * in some cases we may need declare methods for objects being created
2744 * e.g., when we create symlink
2746 const struct dt_body_operations osd_body_ops_new = {
2747 .dbo_declare_write = osd_declare_write,
2750 const struct dt_body_operations osd_body_ops = {
2751 .dbo_read = osd_read,
2752 .dbo_declare_write = osd_declare_write,
2753 .dbo_write = osd_write,
2754 .dbo_bufs_get = osd_bufs_get,
2755 .dbo_bufs_put = osd_bufs_put,
2756 .dbo_write_prep = osd_write_prep,
2757 .dbo_declare_write_commit = osd_declare_write_commit,
2758 .dbo_write_commit = osd_write_commit,
2759 .dbo_read_prep = osd_read_prep,
2760 .dbo_declare_punch = osd_declare_punch,
2761 .dbo_punch = osd_punch,
2762 .dbo_fiemap_get = osd_fiemap_get,
2763 .dbo_ladvise = osd_ladvise,
2764 .dbo_declare_fallocate = osd_declare_fallocate,
2765 .dbo_fallocate = osd_fallocate,
2766 .dbo_lseek = osd_lseek,
2770 * Get a truncate lock
2772 * In order to take multi-transaction truncate out of main transaction we let
2773 * the caller grab a lock on the object passed. the lock can be shared (for
2774 * writes) and exclusive (for truncate). It's not allowed to mix truncate
2775 * and write in the same transaction handle (do not confuse with big ldiskfs
2776 * transaction containing lots of handles).
2777 * The lock must be taken at declaration.
2779 * \param obj object to lock
2781 * \shared shared or exclusive
2783 * \retval 0 lock is granted
2784 * \retval -NOMEM no memory to allocate lock
2786 int osd_trunc_lock(struct osd_object *obj, struct osd_thandle *oh, bool shared)
2788 struct osd_access_lock *al, *tmp;
2793 list_for_each_entry(tmp, &oh->ot_trunc_locks, tl_list) {
2794 if (tmp->tl_obj != obj)
2796 LASSERT(tmp->tl_shared == shared);
2797 /* found same lock */
2802 if (unlikely(al == NULL))
2805 al->tl_truncate = false;
2807 down_read(&obj->oo_ext_idx_sem);
2809 down_write(&obj->oo_ext_idx_sem);
2810 al->tl_shared = shared;
2811 lu_object_get(&obj->oo_dt.do_lu);
2813 list_add(&al->tl_list, &oh->ot_trunc_locks);
2818 void osd_trunc_unlock_all(const struct lu_env *env, struct list_head *list)
2820 struct osd_access_lock *al, *tmp;
2822 list_for_each_entry_safe(al, tmp, list, tl_list) {
2824 up_read(&al->tl_obj->oo_ext_idx_sem);
2826 up_write(&al->tl_obj->oo_ext_idx_sem);
2827 osd_object_put(env, al->tl_obj);
2828 list_del(&al->tl_list);
2833 /* For a partial-page punch, flush punch range to disk immediately */
2834 static void osd_partial_page_flush_punch(struct osd_device *d,
2835 struct inode *inode, loff_t start,
2838 if (osd_use_page_cache(d)) {
2839 filemap_fdatawrite_range(inode->i_mapping, start, end);
2841 /* Notice we use "wait" version to ensure I/O is complete */
2842 filemap_write_and_wait_range(inode->i_mapping, start,
2844 invalidate_mapping_pages(inode->i_mapping, start >> PAGE_SHIFT,
2850 * For a partial-page truncate, flush the page to disk immediately to
2851 * avoid data corruption during direct disk write. b=17397
2853 static void osd_partial_page_flush(struct osd_device *d, struct inode *inode,
2856 if (!(offset & ~PAGE_MASK))
2859 if (osd_use_page_cache(d)) {
2860 filemap_fdatawrite_range(inode->i_mapping, offset, offset + 1);
2862 /* Notice we use "wait" version to ensure I/O is complete */
2863 filemap_write_and_wait_range(inode->i_mapping, offset,
2865 invalidate_mapping_pages(inode->i_mapping, offset >> PAGE_SHIFT,
2866 offset >> PAGE_SHIFT);
2870 void osd_execute_truncate(struct osd_object *obj)
2872 struct osd_device *d = osd_obj2dev(obj);
2873 struct inode *inode = obj->oo_inode;
2876 /* simulate crash before (in the middle) of delayed truncate */
2877 if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FAIL_AT_TRUNCATE)) {
2878 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
2879 struct ldiskfs_sb_info *sbi = LDISKFS_SB(inode->i_sb);
2881 mutex_lock(&sbi->s_orphan_lock);
2882 list_del_init(&ei->i_orphan);
2883 mutex_unlock(&sbi->s_orphan_lock);
2887 size = i_size_read(inode);
2889 /* if object holds encrypted content, we need to make sure we truncate
2890 * on an encryption unit boundary, or block content will get corrupted
2892 if (obj->oo_lma_flags & LUSTRE_ENCRYPT_FL &&
2893 size & ~LUSTRE_ENCRYPTION_MASK)
2894 inode->i_size = (size & LUSTRE_ENCRYPTION_MASK) +
2895 LUSTRE_ENCRYPTION_UNIT_SIZE;
2896 ldiskfs_truncate(inode);
2897 inode_unlock(inode);
2898 if (inode->i_size != size) {
2899 spin_lock(&inode->i_lock);
2900 i_size_write(inode, size);
2901 LDISKFS_I(inode)->i_disksize = size;
2902 spin_unlock(&inode->i_lock);
2903 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
2905 osd_partial_page_flush(d, inode, size);
2908 static int osd_execute_punch(const struct lu_env *env, struct osd_object *obj,
2909 loff_t start, loff_t end, int mode)
2911 struct osd_device *d = osd_obj2dev(obj);
2912 struct inode *inode = obj->oo_inode;
2916 file = alloc_file_pseudo(inode, d->od_mnt, "/", O_NOATIME,
2919 RETURN(PTR_ERR(file));
2921 file->f_mode |= FMODE_64BITHASH;
2922 rc = file->f_op->fallocate(file, mode, start, end - start);
2926 osd_partial_page_flush_punch(d, inode, start, end - 1);
2930 int osd_process_truncates(const struct lu_env *env, struct list_head *list)
2932 struct osd_access_lock *al;
2935 LASSERT(!journal_current_handle());
2937 list_for_each_entry(al, list, tl_list) {
2940 if (al->tl_truncate)
2941 osd_execute_truncate(al->tl_obj);
2942 else if (al->tl_punch)
2943 rc = osd_execute_punch(env, al->tl_obj, al->tl_start,
2944 al->tl_end, al->tl_mode);