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}*()
53 #include <obd_support.h>
54 #include <libcfs/libcfs.h>
56 #include "osd_internal.h"
59 #include <ldiskfs/ldiskfs_extents.h>
60 #include <ldiskfs/ldiskfs.h>
62 struct kmem_cache *biop_cachep;
64 #ifdef HAVE_BIO_ENDIO_USES_ONE_ARG
65 static void dio_complete_routine(struct bio *bio);
67 static void dio_complete_routine(struct bio *bio, int error);
70 static int osd_bio_init(struct bio *bio, struct osd_iobuf *iobuf,
71 bool integrity_enabled, int start_page_idx)
73 struct osd_bio_private *bio_private = NULL;
76 OBD_SLAB_ALLOC_GFP(bio_private, biop_cachep, sizeof(*bio_private),
78 if (bio_private == NULL)
81 bio->bi_end_io = dio_complete_routine;
82 bio->bi_private = bio_private;
83 bio_private->obp_start_page_idx = start_page_idx;
84 bio_private->obp_iobuf = iobuf;
89 static void osd_bio_fini(struct bio *bio)
91 struct osd_bio_private *bio_private;
95 bio_private = bio->bi_private;
97 OBD_SLAB_FREE(bio_private, biop_cachep, sizeof(*bio_private));
100 static inline bool osd_use_page_cache(struct osd_device *d)
102 /* do not use pagecache if write and read caching are disabled */
103 if (d->od_writethrough_cache + d->od_read_cache == 0)
105 /* use pagecache by default */
109 static int __osd_init_iobuf(struct osd_device *d, struct osd_iobuf *iobuf,
110 int rw, int line, int pages)
114 LASSERTF(iobuf->dr_elapsed_valid == 0,
115 "iobuf %p, reqs %d, rw %d, line %d\n", iobuf,
116 atomic_read(&iobuf->dr_numreqs), iobuf->dr_rw,
118 LASSERT(pages <= PTLRPC_MAX_BRW_PAGES);
120 init_waitqueue_head(&iobuf->dr_wait);
121 atomic_set(&iobuf->dr_numreqs, 0);
122 iobuf->dr_npages = 0;
126 iobuf->dr_elapsed = ktime_set(0, 0);
127 /* must be counted before, so assert */
129 iobuf->dr_init_at = line;
131 /* Init dr_start_pg_wblks to 0 for osd_read/write_prep().
132 * For osd_write_commit() need to keep the value assigned in
133 * osd_ldiskfs_map_inode_pages() during retries, and before it ,
134 * init dr_start_pg_wblks to 0 in osd_write_prep() is sufficient.
137 iobuf->dr_start_pg_wblks = 0;
139 blocks = pages * (PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
140 if (iobuf->dr_bl_buf.lb_len >= blocks * sizeof(iobuf->dr_blocks[0])) {
141 LASSERT(iobuf->dr_pg_buf.lb_len >=
142 pages * sizeof(iobuf->dr_pages[0]));
146 /* start with 1MB for 4K blocks */
148 while (i <= PTLRPC_MAX_BRW_PAGES && i < pages)
151 CDEBUG(D_OTHER, "realloc %u for %u (%u) pages\n",
152 (unsigned int)(pages * sizeof(iobuf->dr_pages[0])), i, pages);
154 blocks = pages * (PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
155 iobuf->dr_max_pages = 0;
156 CDEBUG(D_OTHER, "realloc %u for %u blocks\n",
157 (unsigned int)(blocks * sizeof(iobuf->dr_blocks[0])), blocks);
159 lu_buf_realloc(&iobuf->dr_bl_buf, blocks * sizeof(iobuf->dr_blocks[0]));
160 iobuf->dr_blocks = iobuf->dr_bl_buf.lb_buf;
161 if (unlikely(iobuf->dr_blocks == NULL))
164 lu_buf_realloc(&iobuf->dr_pg_buf, pages * sizeof(iobuf->dr_pages[0]));
165 iobuf->dr_pages = iobuf->dr_pg_buf.lb_buf;
166 if (unlikely(iobuf->dr_pages == NULL))
169 lu_buf_realloc(&iobuf->dr_lnb_buf,
170 pages * sizeof(iobuf->dr_lnbs[0]));
171 iobuf->dr_lnbs = iobuf->dr_lnb_buf.lb_buf;
172 if (unlikely(iobuf->dr_lnbs == NULL))
175 iobuf->dr_max_pages = pages;
179 #define osd_init_iobuf(dev, iobuf, rw, pages) \
180 __osd_init_iobuf(dev, iobuf, rw, __LINE__, pages)
182 static void osd_iobuf_add_page(struct osd_iobuf *iobuf,
183 struct niobuf_local *lnb)
185 LASSERT(iobuf->dr_npages < iobuf->dr_max_pages);
186 iobuf->dr_pages[iobuf->dr_npages] = lnb->lnb_page;
187 iobuf->dr_lnbs[iobuf->dr_npages] = lnb;
191 void osd_fini_iobuf(struct osd_device *d, struct osd_iobuf *iobuf)
193 int rw = iobuf->dr_rw;
195 if (iobuf->dr_elapsed_valid) {
196 struct brw_stats *h = &d->od_brw_stats;
198 iobuf->dr_elapsed_valid = 0;
199 LASSERT(iobuf->dr_dev == d);
200 LASSERT(iobuf->dr_frags > 0);
201 lprocfs_oh_tally_pcpu(&h->bs_hist[BRW_R_DIO_FRAGS+rw],
203 lprocfs_oh_tally_log2_pcpu(&h->bs_hist[BRW_R_IO_TIME+rw],
204 ktime_to_ms(iobuf->dr_elapsed));
211 #ifdef HAVE_BIO_ENDIO_USES_ONE_ARG
212 static void dio_complete_routine(struct bio *bio)
214 int error = blk_status_to_errno(bio->bi_status);
216 static void dio_complete_routine(struct bio *bio, int error)
219 struct osd_bio_private *bio_private = bio->bi_private;
220 struct osd_iobuf *iobuf = bio_private->obp_iobuf;
224 /* CAVEAT EMPTOR: possibly in IRQ context
225 * DO NOT record procfs stats here!!!
227 if (unlikely(iobuf == NULL)) {
228 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");
229 CERROR("bi_next: %p, bi_flags: %lx, " __stringify(bi_opf)
230 ": %x, bi_vcnt: %d, bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, bi_private: %p\n",
231 bio->bi_next, (unsigned long)bio->bi_flags,
232 (unsigned int)bio->bi_opf, bio->bi_vcnt, bio_idx(bio),
233 bio_sectors(bio) << 9, bio->bi_end_io,
234 atomic_read(&bio->__bi_cnt),
239 /* the check is outside of the cycle for performance reason -bzzz */
240 if (!bio_data_dir(bio)) {
241 DECLARE_BVEC_ITER_ALL(iter_all);
243 bio_for_each_segment_all(bvl, bio, iter_all) {
244 if (likely(error == 0))
245 SetPageUptodate(bvl_to_page(bvl));
246 LASSERT(PageLocked(bvl_to_page(bvl)));
248 atomic_dec(&iobuf->dr_dev->od_r_in_flight);
250 atomic_dec(&iobuf->dr_dev->od_w_in_flight);
253 /* any real error is good enough -bzzz */
254 if (error != 0 && iobuf->dr_error == 0)
255 iobuf->dr_error = error;
258 * set dr_elapsed before dr_numreqs turns to 0, otherwise
259 * it's possible that service thread will see dr_numreqs
260 * is zero, but dr_elapsed is not set yet, leading to lost
261 * data in this processing and an assertion in a subsequent
264 if (atomic_read(&iobuf->dr_numreqs) == 1) {
265 ktime_t now = ktime_get();
267 iobuf->dr_elapsed = ktime_sub(now, iobuf->dr_start_time);
268 iobuf->dr_elapsed_valid = 1;
270 if (atomic_dec_and_test(&iobuf->dr_numreqs))
271 wake_up(&iobuf->dr_wait);
273 /* Completed bios used to be chained off iobuf->dr_bios and freed in
274 * filter_clear_dreq(). It was then possible to exhaust the biovec-256
275 * mempool when serious on-disk fragmentation was encountered,
276 * deadlocking the OST. The bios are now released as soon as complete
277 * so the pool cannot be exhausted while IOs are competing. b=10076
282 static void record_start_io(struct osd_iobuf *iobuf, int size)
284 struct osd_device *osd = iobuf->dr_dev;
285 struct brw_stats *h = &osd->od_brw_stats;
288 atomic_inc(&iobuf->dr_numreqs);
290 if (iobuf->dr_rw == 0) {
291 atomic_inc(&osd->od_r_in_flight);
292 lprocfs_oh_tally_pcpu(&h->bs_hist[BRW_R_RPC_HIST],
293 atomic_read(&osd->od_r_in_flight));
294 lprocfs_oh_tally_log2_pcpu(&h->bs_hist[BRW_R_DISK_IOSIZE],
296 } else if (iobuf->dr_rw == 1) {
297 atomic_inc(&osd->od_w_in_flight);
298 lprocfs_oh_tally_pcpu(&h->bs_hist[BRW_W_RPC_HIST],
299 atomic_read(&osd->od_w_in_flight));
300 lprocfs_oh_tally_log2_pcpu(&h->bs_hist[BRW_W_DISK_IOSIZE],
307 static void osd_submit_bio(int rw, struct bio *bio)
309 LASSERTF(rw == 0 || rw == 1, "%x\n", rw);
310 #ifdef HAVE_SUBMIT_BIO_2ARGS
311 submit_bio(rw ? WRITE : READ, bio);
318 static int can_be_merged(struct bio *bio, sector_t sector)
323 return bio_end_sector(bio) == sector ? 1 : 0;
327 static void osd_mark_page_io_done(struct osd_iobuf *iobuf,
329 sector_t start_blocks,
332 struct niobuf_local **lnbs = iobuf->dr_lnbs;
333 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
336 i = start_blocks / blocks_per_page;
337 end = (start_blocks + count) / blocks_per_page;
338 for ( ; i < end; i++)
339 lnbs[i]->lnb_flags |= OBD_BRW_DONE;
343 * Linux v5.12-rc1-20-ga8affc03a9b3
344 * block: rename BIO_MAX_PAGES to BIO_MAX_VECS
347 #define BIO_MAX_VECS BIO_MAX_PAGES
350 static int osd_do_bio(struct osd_device *osd, struct inode *inode,
351 struct osd_iobuf *iobuf, sector_t start_blocks,
354 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
355 struct page **pages = iobuf->dr_pages;
356 int npages = iobuf->dr_npages;
357 sector_t *blocks = iobuf->dr_blocks;
358 struct super_block *sb = inode->i_sb;
359 int sector_bits = sb->s_blocksize_bits - 9;
360 unsigned int blocksize = sb->s_blocksize;
361 struct block_device *bdev = sb->s_bdev;
362 struct bio *bio = NULL;
363 int bio_start_page_idx;
365 unsigned int page_offset;
368 int block_idx, block_idx_end;
369 int page_idx, page_idx_start;
373 bool integrity_enabled;
374 struct blk_plug plug;
375 int blocks_left_page;
379 fault_inject = CFS_FAIL_CHECK(OBD_FAIL_OST_INTEGRITY_FAULT);
380 LASSERT(iobuf->dr_npages == npages);
382 integrity_enabled = bdev_integrity_enabled(bdev, iobuf->dr_rw);
384 osd_brw_stats_update(osd, iobuf);
385 iobuf->dr_start_time = ktime_get();
388 count = npages * blocks_per_page;
389 block_idx_end = start_blocks + count;
391 blk_start_plug(&plug);
393 page_idx_start = start_blocks / blocks_per_page;
394 for (page_idx = page_idx_start, block_idx = start_blocks;
395 block_idx < block_idx_end; page_idx++,
396 block_idx += blocks_left_page) {
397 /* For cases where the filesystems blocksize is not the
398 * same as PAGE_SIZE (e.g. ARM with PAGE_SIZE=64KB and
399 * blocksize=4KB), there will be multiple blocks to
400 * read/write per page. Also, the start and end block may
401 * not be aligned to the start and end of the page, so the
402 * first page may skip some blocks at the start ("i != 0",
403 * "blocks_left_page" is reduced), and the last page may
404 * skip some blocks at the end (limited by "count").
406 page = pages[page_idx];
407 LASSERT(page_idx < iobuf->dr_npages);
409 i = block_idx % blocks_per_page;
410 blocks_left_page = blocks_per_page - i;
411 if (block_idx + blocks_left_page > block_idx_end)
412 blocks_left_page = block_idx_end - block_idx;
413 page_offset = i * blocksize;
414 for (i = 0; i < blocks_left_page;
415 i += nblocks, page_offset += blocksize * nblocks) {
418 if (blocks[block_idx + i] == 0) { /* hole */
419 LASSERTF(iobuf->dr_rw == 0,
420 "page_idx %u, block_idx %u, i %u,"
421 "start_blocks: %llu, count: %llu, npages: %d\n",
422 page_idx, block_idx, i,
423 (unsigned long long)start_blocks,
424 (unsigned long long)count, npages);
425 memset(kmap(page) + page_offset, 0, blocksize);
430 sector = (sector_t)blocks[block_idx + i] << sector_bits;
432 /* Additional contiguous file blocks? */
433 while (i + nblocks < blocks_left_page &&
434 (sector + (nblocks << sector_bits)) ==
435 ((sector_t)blocks[block_idx + i + nblocks] <<
439 if (bio && can_be_merged(bio, sector) &&
440 bio_add_page(bio, page, blocksize * nblocks,
442 continue; /* added this frag OK */
445 struct request_queue *q = bio_get_queue(bio);
446 unsigned int bi_size = bio_sectors(bio) << 9;
448 /* Dang! I have to fragment this I/O */
450 "bio++ sz %d vcnt %d(%d) sectors %d(%d) psg %d(%d)\n",
451 bi_size, bio->bi_vcnt, bio->bi_max_vecs,
453 queue_max_sectors(q),
454 osd_bio_nr_segs(bio),
455 queue_max_segments(q));
456 rc = osd_bio_integrity_handle(osd, bio,
457 iobuf, bio_start_page_idx,
458 fault_inject, integrity_enabled);
463 record_start_io(iobuf, bi_size);
464 osd_submit_bio(iobuf->dr_rw, bio);
467 bio_start_page_idx = page_idx;
468 /* allocate new bio */
469 bio = cfs_bio_alloc(bdev,
470 min_t(unsigned short, BIO_MAX_VECS,
471 (block_idx_end - block_idx +
472 blocks_left_page - 1)),
473 iobuf->dr_rw ? REQ_OP_WRITE
477 CERROR("Can't allocate bio %u pages\n",
478 block_idx_end - block_idx +
479 blocks_left_page - 1);
483 bio_set_sector(bio, sector);
484 rc = osd_bio_init(bio, iobuf, integrity_enabled,
489 rc = bio_add_page(bio, page,
490 blocksize * nblocks, page_offset);
496 rc = osd_bio_integrity_handle(osd, bio, iobuf,
503 record_start_io(iobuf, bio_sectors(bio) << 9);
504 osd_submit_bio(iobuf->dr_rw, bio);
509 blk_finish_plug(&plug);
511 /* in order to achieve better IO throughput, we don't wait for writes
512 * completion here. instead we proceed with transaction commit in
513 * parallel and wait for IO completion once transaction is stopped
514 * see osd_trans_stop() for more details -bzzz
516 if (iobuf->dr_rw == 0 || fault_inject)
517 wait_event(iobuf->dr_wait,
518 atomic_read(&iobuf->dr_numreqs) == 0);
521 rc = iobuf->dr_error;
525 if (iobuf->dr_rw == 0 || fault_inject)
526 osd_fini_iobuf(osd, iobuf);
529 if (rc == 0 && iobuf->dr_rw)
530 osd_mark_page_io_done(iobuf, inode,
531 start_blocks, count);
536 static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
537 struct niobuf_local *lnb, int maxlnb)
545 int poff = offset & (PAGE_SIZE - 1);
546 int plen = PAGE_SIZE - poff;
548 if (*nrpages >= maxlnb) {
555 lnb->lnb_file_offset = offset;
556 lnb->lnb_page_offset = poff;
558 /* lnb->lnb_flags = rnb->rnb_flags; */
560 lnb->lnb_page = NULL;
562 lnb->lnb_guard_rpc = 0;
563 lnb->lnb_guard_disk = 0;
566 LASSERTF(plen <= len, "plen %u, len %lld\n", plen,
577 static struct page *osd_get_page(const struct lu_env *env, struct dt_object *dt,
578 loff_t offset, gfp_t gfp_mask, bool cache)
580 struct osd_thread_info *oti = osd_oti_get(env);
581 struct inode *inode = osd_dt_obj(dt)->oo_inode;
582 struct osd_device *d = osd_obj2dev(osd_dt_obj(dt));
589 page = find_or_create_page(inode->i_mapping,
590 offset >> PAGE_SHIFT, gfp_mask);
593 LASSERT(!PagePrivate2(page));
594 wait_on_page_writeback(page);
596 lprocfs_counter_add(d->od_stats, LPROC_OSD_NO_PAGE, 1);
602 if (inode->i_mapping->nrpages) {
603 /* consult with pagecache, but do not create new pages */
604 /* this is normally used once */
605 page = find_lock_page(inode->i_mapping, offset >> PAGE_SHIFT);
607 wait_on_page_writeback(page);
612 LASSERT(oti->oti_dio_pages);
613 cur = oti->oti_dio_pages_used;
614 page = oti->oti_dio_pages[cur];
616 if (unlikely(!page)) {
617 LASSERT(cur < PTLRPC_MAX_BRW_PAGES);
618 page = alloc_page(gfp_mask);
621 oti->oti_dio_pages[cur] = page;
622 SetPagePrivate2(page);
626 ClearPageUptodate(page);
627 page->index = offset >> PAGE_SHIFT;
628 oti->oti_dio_pages_used++;
634 * there are following "locks":
645 * - lock pages, unlock
647 * - lock partial page
653 * Unlock and release pages loaded by osd_bufs_get()
655 * Unlock \a npages pages from \a lnb and drop the refcount on them.
657 * \param env thread execution environment
658 * \param dt dt object undergoing IO (OSD object + methods)
659 * \param lnb array of pages undergoing IO
660 * \param npages number of pages in \a lnb
664 static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
665 struct niobuf_local *lnb, int npages)
667 struct osd_thread_info *oti = osd_oti_get(env);
671 ll_pagevec_init(&pvec, 0);
673 for (i = 0; i < npages; i++) {
674 struct page *page = lnb[i].lnb_page;
679 /* if the page isn't cached, then reset uptodate
682 if (PagePrivate2(page)) {
683 oti->oti_dio_pages_used--;
685 if (lnb[i].lnb_locked)
687 if (pagevec_add(&pvec, page) == 0)
688 pagevec_release(&pvec);
691 lnb[i].lnb_page = NULL;
694 LASSERTF(oti->oti_dio_pages_used == 0, "%d\n", oti->oti_dio_pages_used);
696 /* Release any partial pagevec */
697 pagevec_release(&pvec);
703 * Load and lock pages undergoing IO
705 * Pages as described in the \a lnb array are fetched (from disk or cache)
706 * and locked for IO by the caller.
708 * DLM locking protects us from write and truncate competing for same region,
709 * but partial-page truncate can leave dirty pages in the cache for ldiskfs.
710 * It's possible the writeout on a such a page is in progress when we access
711 * it. It's also possible that during this writeout we put new (partial) data
712 * into the page, but won't be able to proceed in filter_commitrw_write().
713 * Therefore, just wait for writeout completion as it should be rare enough.
715 * \param env thread execution environment
716 * \param dt dt object undergoing IO (OSD object + methods)
717 * \param pos byte offset of IO start
718 * \param len number of bytes of IO
719 * \param lnb array of extents undergoing IO
720 * \param rw read or write operation, and other flags
721 * \param capa capabilities
723 * \retval pages (zero or more) loaded successfully
724 * \retval -ENOMEM on memory/page allocation error
726 static int osd_bufs_get(const struct lu_env *env, struct dt_object *dt,
727 loff_t pos, ssize_t len, struct niobuf_local *lnb,
728 int maxlnb, enum dt_bufs_type rw)
730 struct osd_thread_info *oti = osd_oti_get(env);
731 struct osd_object *obj = osd_dt_obj(dt);
732 struct osd_device *osd = osd_obj2dev(obj);
733 int npages, i, iosize, rc = 0;
738 LASSERT(obj->oo_inode);
740 if (unlikely(obj->oo_destroyed))
743 rc = osd_map_remote_to_local(pos, len, &npages, lnb, maxlnb);
747 write = rw & DT_BUFS_TYPE_WRITE;
749 fsize = lnb[npages - 1].lnb_file_offset + lnb[npages - 1].lnb_len;
750 iosize = fsize - lnb[0].lnb_file_offset;
751 fsize = max(fsize, i_size_read(obj->oo_inode));
753 cache = rw & DT_BUFS_TYPE_READAHEAD;
757 cache = osd_use_page_cache(osd);
760 if (!osd->od_writethrough_cache) {
764 if (iosize > osd->od_writethrough_max_iosize) {
769 if (!osd->od_read_cache) {
773 if (iosize > osd->od_readcache_max_iosize) {
778 /* don't use cache on large files */
779 if (osd->od_readcache_max_filesize &&
780 fsize > osd->od_readcache_max_filesize)
786 if (!cache && unlikely(!oti->oti_dio_pages)) {
787 OBD_ALLOC_PTR_ARRAY_LARGE(oti->oti_dio_pages,
788 PTLRPC_MAX_BRW_PAGES);
789 if (!oti->oti_dio_pages)
793 /* this could also try less hard for DT_BUFS_TYPE_READAHEAD pages */
794 gfp_mask = rw & DT_BUFS_TYPE_LOCAL ? (GFP_NOFS | __GFP_HIGHMEM) :
796 for (i = 0; i < npages; i++, lnb++) {
797 lnb->lnb_page = osd_get_page(env, dt, lnb->lnb_file_offset,
799 if (lnb->lnb_page == NULL)
800 GOTO(cleanup, rc = -ENOMEM);
804 mark_page_accessed(lnb->lnb_page);
808 /* XXX: this version doesn't invalidate cached pages, but use them */
809 if (!cache && write && obj->oo_inode->i_mapping->nrpages) {
810 /* do not allow data aliasing, invalidate pagecache */
811 /* XXX: can be quite expensive in mixed case */
812 invalidate_mapping_pages(obj->oo_inode->i_mapping,
813 lnb[0].lnb_file_offset >> PAGE_SHIFT,
814 lnb[npages - 1].lnb_file_offset >> PAGE_SHIFT);
822 osd_bufs_put(env, dt, lnb - i, i);
826 #ifdef HAVE_LDISKFS_JOURNAL_ENSURE_CREDITS
827 static int osd_extend_restart_trans(handle_t *handle, int needed,
832 rc = ldiskfs_journal_ensure_credits(handle, needed,
833 ldiskfs_trans_default_revoke_credits(inode->i_sb));
834 /* this means journal has been restarted */
841 static int osd_extend_restart_trans(handle_t *handle, int needed,
846 if (ldiskfs_handle_has_enough_credits(handle, needed))
848 rc = ldiskfs_journal_extend(handle,
849 needed - handle->h_buffer_credits);
853 return ldiskfs_journal_restart(handle, needed);
855 #endif /* HAVE_LDISKFS_JOURNAL_ENSURE_CREDITS */
857 static int osd_ldiskfs_map_write(struct inode *inode, struct osd_iobuf *iobuf,
858 struct osd_device *osd, sector_t start_blocks,
859 sector_t count, loff_t *disk_size,
862 /* if file has grown, take user_size into account */
863 if (user_size && *disk_size > user_size)
864 *disk_size = user_size;
866 spin_lock(&inode->i_lock);
867 if (*disk_size > i_size_read(inode)) {
868 i_size_write(inode, *disk_size);
869 LDISKFS_I(inode)->i_disksize = *disk_size;
870 spin_unlock(&inode->i_lock);
871 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
873 spin_unlock(&inode->i_lock);
877 * We don't do stats here as in read path because
878 * write is async: we'll do this in osd_put_bufs()
880 return osd_do_bio(osd, inode, iobuf, start_blocks, count);
883 static unsigned int osd_extent_bytes(const struct osd_device *o)
885 unsigned int *extent_bytes_ptr =
886 raw_cpu_ptr(o->od_extent_bytes_percpu);
888 if (likely(*extent_bytes_ptr))
889 return *extent_bytes_ptr;
891 /* initialize on first access or CPU hotplug */
892 if (!ldiskfs_has_feature_extents(osd_sb(o)))
893 *extent_bytes_ptr = 1 << osd_sb(o)->s_blocksize_bits;
895 *extent_bytes_ptr = OSD_DEFAULT_EXTENT_BYTES;
897 return *extent_bytes_ptr;
900 #define EXTENT_BYTES_DECAY 64
901 static void osd_decay_extent_bytes(struct osd_device *osd,
902 unsigned int new_bytes)
904 unsigned int old_bytes;
906 if (!ldiskfs_has_feature_extents(osd_sb(osd)))
909 old_bytes = osd_extent_bytes(osd);
910 *raw_cpu_ptr(osd->od_extent_bytes_percpu) =
911 (old_bytes * (EXTENT_BYTES_DECAY - 1) +
912 min(new_bytes, OSD_DEFAULT_EXTENT_BYTES) +
913 EXTENT_BYTES_DECAY - 1) / EXTENT_BYTES_DECAY;
916 static int osd_ldiskfs_map_inode_pages(struct inode *inode,
917 struct osd_iobuf *iobuf,
918 struct osd_device *osd,
919 int create, __u64 user_size,
921 struct thandle *thandle)
923 int blocks_per_page = PAGE_SIZE >> inode->i_blkbits;
924 int rc = 0, i = 0, mapped_index = 0;
925 struct page *fp = NULL;
927 pgoff_t max_page_index;
928 handle_t *handle = NULL;
929 sector_t start_blocks = 0, count = 0;
930 loff_t disk_size = 0;
931 struct page **page = iobuf->dr_pages;
932 int pages = iobuf->dr_npages;
933 sector_t *blocks = iobuf->dr_blocks;
934 struct niobuf_local *lnb1, *lnb2;
937 max_page_index = inode->i_sb->s_maxbytes >> PAGE_SHIFT;
939 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
940 inode->i_ino, pages, (*page)->index);
943 create = LDISKFS_GET_BLOCKS_CREATE;
944 handle = ldiskfs_journal_current_handle();
945 LASSERT(handle != NULL);
946 rc = osd_attach_jinode(inode);
949 disk_size = i_size_read(inode);
950 /* if disk_size is already bigger than specified user_size,
953 if (disk_size > user_size)
956 /* pages are sorted already. so, we just have to find
957 * contig. space and process them properly
960 long blen, total = 0, previous_total = 0;
961 struct ldiskfs_map_blocks map = { 0 };
964 if (fp == NULL) { /* start new extent */
969 } else if (fp->index + clen == (*page)->index) {
970 /* continue the extent */
976 if (fp->index + clen >= max_page_index)
977 GOTO(cleanup, rc = -EFBIG);
978 /* process found extent */
979 map.m_lblk = fp->index * blocks_per_page;
980 map.m_len = blen = clen * blocks_per_page;
983 * Skip already written blocks of the start page.
984 * Note that this branch will not go into for 4K PAGE_SIZE.
985 * Because dr_start_pg_wblks is always 0 for 4K PAGE_SIZE.
986 * iobuf->dr_start_pg_wblks = (start_blocks + count) %
989 if (iobuf->dr_start_pg_wblks > 0) {
990 total = previous_total = start_blocks =
991 iobuf->dr_start_pg_wblks;
992 map.m_lblk = fp->index * blocks_per_page +
994 map.m_len = blen - total;
995 iobuf->dr_start_pg_wblks = 0;
1000 * We might restart transaction for block allocations,
1001 * in order to make sure data ordered mode, issue IO, disk
1002 * size update and block allocations need be within same
1003 * transaction to make sure consistency.
1005 if (handle && check_credits) {
1006 struct osd_thandle *oh;
1008 LASSERT(thandle != NULL);
1009 oh = container_of(thandle, struct osd_thandle,
1012 * only issue IO if restart transaction needed,
1013 * as update disk size need hold inode lock, we
1014 * want to avoid that as much as possible.
1016 if (oh->oh_declared_ext <= 0) {
1017 rc = osd_ldiskfs_map_write(inode,
1018 iobuf, osd, start_blocks,
1019 count, &disk_size, user_size);
1022 thandle->th_restart_tran = 1;
1023 iobuf->dr_start_pg_wblks = (start_blocks +
1024 count) % blocks_per_page;
1025 GOTO(cleanup, rc = -EAGAIN);
1028 if (CFS_FAIL_CHECK(OBD_FAIL_OST_RESTART_IO))
1029 oh->oh_declared_ext = 0;
1031 oh->oh_declared_ext--;
1035 rc = ldiskfs_map_blocks(handle, inode, &map, create);
1036 time = ktime_sub(ktime_get(), time);
1039 struct brw_stats *h = &osd->od_brw_stats;
1042 idx = map.m_flags & LDISKFS_MAP_NEW ?
1043 BRW_ALLOC_TIME : BRW_MAP_TIME;
1044 lprocfs_oh_tally_log2_pcpu(&h->bs_hist[idx],
1047 for (; total < blen && c < map.m_len; c++, total++) {
1049 *(blocks + total) = 0;
1053 if ((map.m_flags & LDISKFS_MAP_UNWRITTEN) &&
1055 /* don't try to read allocated, but
1056 * unwritten blocks, instead fill the
1057 * patches with zeros in osd_do_bio() */
1058 *(blocks + total) = 0;
1061 *(blocks + total) = map.m_pblk + c;
1062 /* unmap any possible underlying
1063 * metadata from the block device
1066 if ((map.m_flags & LDISKFS_MAP_NEW) &&
1068 clean_bdev_aliases(inode->i_sb->s_bdev,
1074 if (rc == 0 && create) {
1075 count += (total - previous_total);
1076 mapped_index = (start_blocks + count + blocks_per_page -
1077 1) / blocks_per_page - 1;
1078 lnb1 = iobuf->dr_lnbs[i - clen];
1079 lnb2 = iobuf->dr_lnbs[mapped_index];
1080 size1 = lnb1->lnb_file_offset -
1081 (lnb1->lnb_file_offset % PAGE_SIZE) +
1082 (total << inode->i_blkbits);
1083 size2 = lnb2->lnb_file_offset + lnb2->lnb_len;
1087 if (size1 > disk_size)
1091 if (rc == 0 && total < blen) {
1093 * decay extent blocks if we could not
1094 * allocate extent once.
1096 osd_decay_extent_bytes(osd,
1097 (total - previous_total) << inode->i_blkbits);
1098 map.m_lblk = fp->index * blocks_per_page + total;
1099 map.m_len = blen - total;
1100 previous_total = total;
1106 * decay extent blocks if we could allocate
1107 * good large extent.
1109 if (total - previous_total >=
1110 osd_extent_bytes(osd) >> inode->i_blkbits)
1111 osd_decay_extent_bytes(osd,
1112 (total - previous_total) << inode->i_blkbits);
1113 /* look for next extent */
1115 blocks += blocks_per_page * clen;
1118 if (rc == 0 && create &&
1119 start_blocks < pages * blocks_per_page) {
1120 rc = osd_ldiskfs_map_write(inode, iobuf, osd, start_blocks,
1121 count, &disk_size, user_size);
1122 LASSERT(start_blocks + count == pages * blocks_per_page);
1127 static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
1128 struct niobuf_local *lnb, int npages)
1130 struct osd_thread_info *oti = osd_oti_get(env);
1131 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1132 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1133 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1142 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1143 if (unlikely(rc != 0))
1146 isize = i_size_read(inode);
1147 maxidx = ((isize + PAGE_SIZE - 1) >> PAGE_SHIFT) - 1;
1149 start = ktime_get();
1150 for (i = 0; i < npages; i++) {
1153 * till commit the content of the page is undefined
1154 * we'll set it uptodate once bulk is done. otherwise
1155 * subsequent reads can access non-stable data
1157 ClearPageUptodate(lnb[i].lnb_page);
1159 if (lnb[i].lnb_len == PAGE_SIZE)
1162 if (maxidx >= lnb[i].lnb_page->index) {
1163 osd_iobuf_add_page(iobuf, &lnb[i]);
1166 char *p = kmap(lnb[i].lnb_page);
1168 off = lnb[i].lnb_page_offset;
1171 off = (lnb[i].lnb_page_offset + lnb[i].lnb_len) &
1174 memset(p + off, 0, PAGE_SIZE - off);
1175 kunmap(lnb[i].lnb_page);
1179 timediff = ktime_us_delta(end, start);
1180 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1182 if (iobuf->dr_npages) {
1183 rc = osd_ldiskfs_map_inode_pages(inode, iobuf, osd, 0,
1185 if (likely(rc == 0)) {
1186 rc = osd_do_bio(osd, inode, iobuf, 0, 0);
1187 /* do IO stats for preparation reads */
1188 osd_fini_iobuf(osd, iobuf);
1195 #define DECLARE_MM_SEGMENT_T(name) mm_segment_t name
1196 #define access_set_kernel(saved_fs, fei) \
1198 saved_fs = get_fs(); \
1199 set_fs(KERNEL_DS); \
1201 #define access_unset_kernel(saved_fs, fei) set_fs((saved_fs))
1203 #define DECLARE_MM_SEGMENT_T(name)
1204 #define access_set_kernel(saved_fs, fei) \
1205 (fei)->fi_flags |= LDISKFS_FIEMAP_FLAG_MEMCPY
1206 #define access_unset_kernel(saved_fs, fei) \
1207 (fei)->fi_flags &= ~(LDISKFS_FIEMAP_FLAG_MEMCPY)
1208 #endif /* KERNEL_DS */
1210 static int osd_is_mapped(struct dt_object *dt, __u64 offset,
1211 struct ldiskfs_map_blocks *map)
1213 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1215 sector_t block = osd_i_blocks(inode, offset);
1218 if (i_size_read(inode) == 0)
1221 /* Beyond EOF, must not be mapped */
1222 if ((i_size_read(inode) - 1) < offset)
1225 end = map->m_lblk + map->m_len;
1226 if (block >= map->m_lblk && block < end)
1227 return map->m_flags & LDISKFS_MAP_MAPPED;
1229 map->m_lblk = block;
1230 map->m_len = INT_MAX;
1232 mapped = ldiskfs_map_blocks(NULL, inode, map, 0);
1238 return map->m_flags & LDISKFS_MAP_MAPPED;
1241 #define MAX_EXTENTS_PER_WRITE 100
1242 static int osd_declare_write_commit(const struct lu_env *env,
1243 struct dt_object *dt,
1244 struct niobuf_local *lnb, int npages,
1245 struct thandle *handle)
1247 const struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1248 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1249 struct osd_thandle *oh;
1250 int extents = 0, new_meta = 0;
1251 int depth, new_blocks = 0;
1253 int dirty_groups = 0;
1256 long long quota_space = 0;
1257 struct ldiskfs_map_blocks map;
1258 enum osd_quota_local_flags local_flags = 0;
1259 enum osd_qid_declare_flags declare_flags = OSD_QID_BLK;
1260 unsigned int extent_bytes;
1261 loff_t extent_start = 0;
1262 loff_t extent_end = 0;
1265 LASSERT(handle != NULL);
1266 oh = container_of(handle, struct osd_thandle, ot_super);
1267 LASSERT(oh->ot_handle == NULL);
1270 * We track a decaying average extent blocks per filesystem,
1271 * for most of time, it will be 1M, with filesystem becoming
1272 * heavily-fragmented, it will be reduced to 4K at the worst.
1274 extent_bytes = osd_extent_bytes(osd);
1275 LASSERT(extent_bytes >= osd_sb(osd)->s_blocksize);
1277 /* calculate number of extents (probably better to pass nb) */
1278 for (i = 0; i < npages; i++) {
1279 /* ignore quota for the whole request if any page is from
1280 * client cache or written by root.
1282 * XXX we could handle this on per-lnb basis as done by
1285 if ((lnb[i].lnb_flags & OBD_BRW_NOQUOTA) ||
1286 (lnb[i].lnb_flags & OBD_BRW_SYS_RESOURCE) ||
1287 !(lnb[i].lnb_flags & OBD_BRW_SYNC))
1288 declare_flags |= OSD_QID_FORCE;
1291 * Convert unwritten extent might need split extents, could
1294 if (osd_is_mapped(dt, lnb[i].lnb_file_offset, &map) &&
1295 !(map.m_flags & LDISKFS_MAP_UNWRITTEN)) {
1296 lnb[i].lnb_flags |= OBD_BRW_MAPPED;
1300 if (lnb[i].lnb_flags & OBD_BRW_DONE) {
1301 lnb[i].lnb_flags |= OBD_BRW_MAPPED;
1305 /* count only unmapped changes */
1307 if (lnb[i].lnb_file_offset != extent_end || extent_end == 0) {
1308 if (extent_end != 0)
1309 extents += (extent_end - extent_start +
1310 extent_bytes - 1) / extent_bytes;
1311 extent_start = lnb[i].lnb_file_offset;
1312 extent_end = lnb[i].lnb_file_offset + lnb[i].lnb_len;
1314 extent_end += lnb[i].lnb_len;
1317 quota_space += PAGE_SIZE;
1320 credits++; /* inode */
1322 * overwrite case, no need to modify tree and
1328 extents += (extent_end - extent_start +
1329 extent_bytes - 1) / extent_bytes;
1331 * with system space usage growing up, mballoc codes won't
1332 * try best to scan block group to align best free extent as
1333 * we can. So extent bytes per extent could be decayed to a
1334 * very small value, this could make us reserve too many credits.
1335 * We could be more optimistic in the credit reservations, even
1336 * in a case where the filesystem is nearly full, it is extremely
1337 * unlikely that the worst case would ever be hit.
1339 if (extents > MAX_EXTENTS_PER_WRITE)
1340 extents = MAX_EXTENTS_PER_WRITE;
1343 * If we add a single extent, then in the worse case, each tree
1344 * level index/leaf need to be changed in case of the tree split.
1345 * If more extents are inserted, they could cause the whole tree
1346 * split more than once, but this is really rare.
1348 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
1350 * many concurrent threads may grow tree by the time
1351 * our transaction starts. so, consider 2 is a min depth.
1353 depth = ext_depth(inode);
1354 depth = min(max(depth, 1) + 1, LDISKFS_MAX_EXTENT_DEPTH);
1356 credits += depth * 2 * extents;
1359 credits += depth * 3 * extents;
1360 new_meta = depth * 2 * extents;
1364 * With N contiguous data blocks, we need at most
1365 * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1 indirect blocks,
1366 * 2 dindirect blocks, and 1 tindirect block
1368 new_meta = DIV_ROUND_UP(new_blocks,
1369 LDISKFS_ADDR_PER_BLOCK(inode->i_sb)) + 4;
1370 credits += new_meta;
1372 dirty_groups += (extents + new_meta);
1374 oh->oh_declared_ext = extents;
1376 /* quota space for metadata blocks */
1377 quota_space += new_meta * LDISKFS_BLOCK_SIZE(osd_sb(osd));
1379 /* quota space should be reported in 1K blocks */
1380 quota_space = toqb(quota_space);
1382 /* each new block can go in different group (bitmap + gd) */
1384 /* we can't dirty more bitmap blocks than exist */
1385 if (dirty_groups > LDISKFS_SB(osd_sb(osd))->s_groups_count)
1386 credits += LDISKFS_SB(osd_sb(osd))->s_groups_count;
1388 credits += dirty_groups;
1390 /* we can't dirty more gd blocks than exist */
1391 if (dirty_groups > LDISKFS_SB(osd_sb(osd))->s_gdb_count)
1392 credits += LDISKFS_SB(osd_sb(osd))->s_gdb_count;
1394 credits += dirty_groups;
1397 "%s: inode #%lu extent_bytes %u extents %d credits %d\n",
1398 osd_ino2name(inode), inode->i_ino, extent_bytes, extents,
1402 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
1404 /* make sure the over quota flags were not set */
1405 lnb[0].lnb_flags &= ~OBD_BRW_OVER_ALLQUOTA;
1407 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
1408 i_projid_read(inode), quota_space, oh,
1409 osd_dt_obj(dt), &local_flags, declare_flags);
1411 /* we need only to store the overquota flags in the first lnb for
1412 * now, once we support multiple objects BRW, this code needs be
1415 if (local_flags & QUOTA_FL_OVER_USRQUOTA)
1416 lnb[0].lnb_flags |= OBD_BRW_OVER_USRQUOTA;
1417 if (local_flags & QUOTA_FL_OVER_GRPQUOTA)
1418 lnb[0].lnb_flags |= OBD_BRW_OVER_GRPQUOTA;
1419 if (local_flags & QUOTA_FL_OVER_PRJQUOTA)
1420 lnb[0].lnb_flags |= OBD_BRW_OVER_PRJQUOTA;
1421 if (local_flags & QUOTA_FL_ROOT_PRJQUOTA)
1422 lnb[0].lnb_flags |= OBD_BRW_ROOT_PRJQUOTA;
1425 rc = osd_trunc_lock(osd_dt_obj(dt), oh, true);
1430 /* Check if a block is allocated or not */
1431 static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
1432 struct niobuf_local *lnb, int npages,
1433 struct thandle *thandle, __u64 user_size)
1435 struct osd_thread_info *oti = osd_oti_get(env);
1436 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1437 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1438 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1439 int rc = 0, i, check_credits = 0;
1443 rc = osd_init_iobuf(osd, iobuf, 1, npages);
1444 if (unlikely(rc != 0))
1447 dquot_initialize(inode);
1449 for (i = 0; i < npages; i++) {
1450 if (lnb[i].lnb_rc == -ENOSPC &&
1451 (lnb[i].lnb_flags & OBD_BRW_MAPPED)) {
1452 /* Allow the write to proceed if overwriting an
1458 if (lnb[i].lnb_rc) { /* ENOSPC, network RPC error, etc. */
1459 CDEBUG(D_INODE, "Skipping [%d] == %d\n", i,
1461 LASSERT(lnb[i].lnb_page);
1462 generic_error_remove_page(inode->i_mapping,
1467 if (lnb[i].lnb_flags & OBD_BRW_DONE)
1470 if (!(lnb[i].lnb_flags & OBD_BRW_MAPPED))
1473 LASSERT(PageLocked(lnb[i].lnb_page));
1474 LASSERT(!PageWriteback(lnb[i].lnb_page));
1477 * Since write and truncate are serialized by oo_sem, even
1478 * partial-page truncate should not leave dirty pages in the
1481 LASSERT(!PageDirty(lnb[i].lnb_page));
1483 SetPageUptodate(lnb[i].lnb_page);
1485 osd_iobuf_add_page(iobuf, &lnb[i]);
1488 osd_trans_exec_op(env, thandle, OSD_OT_WRITE);
1490 if (CFS_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC)) {
1492 } else if (iobuf->dr_npages > 0) {
1493 rc = osd_ldiskfs_map_inode_pages(inode, iobuf, osd,
1498 /* no pages to write, no transno is needed */
1499 thandle->th_local = 1;
1502 if (rc != 0 && !thandle->th_restart_tran)
1503 osd_fini_iobuf(osd, iobuf);
1505 osd_trans_exec_check(env, thandle, OSD_OT_WRITE);
1507 if (unlikely(rc != 0 && !thandle->th_restart_tran)) {
1508 /* if write fails, we should drop pages from the cache */
1509 for (i = 0; i < npages; i++) {
1510 if (lnb[i].lnb_page == NULL)
1512 if (!PagePrivate2(lnb[i].lnb_page)) {
1513 LASSERT(PageLocked(lnb[i].lnb_page));
1514 generic_error_remove_page(inode->i_mapping,
1523 static int osd_read_prep(const struct lu_env *env, struct dt_object *dt,
1524 struct niobuf_local *lnb, int npages)
1526 struct osd_thread_info *oti = osd_oti_get(env);
1527 struct osd_iobuf *iobuf = &oti->oti_iobuf;
1528 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1529 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1530 int rc = 0, i, cache_hits = 0, cache_misses = 0;
1537 rc = osd_init_iobuf(osd, iobuf, 0, npages);
1538 if (unlikely(rc != 0))
1541 isize = i_size_read(inode);
1543 start = ktime_get();
1544 for (i = 0; i < npages; i++) {
1546 if (isize <= lnb[i].lnb_file_offset)
1547 /* If there's no more data, abort early.
1548 * lnb->lnb_rc == 0, so it's easy to detect later.
1552 /* instead of looking if we go beyong isize, send complete
1553 * pages all the time
1555 lnb[i].lnb_rc = lnb[i].lnb_len;
1557 /* Bypass disk read if fail_loc is set properly */
1558 if (CFS_FAIL_CHECK_QUIET(OBD_FAIL_OST_FAKE_RW))
1559 SetPageUptodate(lnb[i].lnb_page);
1561 if (PageUptodate(lnb[i].lnb_page)) {
1563 unlock_page(lnb[i].lnb_page);
1566 osd_iobuf_add_page(iobuf, &lnb[i]);
1568 /* no need to unlock in osd_bufs_put(), the sooner page is
1569 * unlocked, the earlier another client can access it.
1570 * notice real unlock_page() can be called few lines
1571 * below after osd_do_bio(). lnb is a per-thread, so it's
1572 * fine to have PG_locked and lnb_locked inconsistent here
1574 lnb[i].lnb_locked = 0;
1577 timediff = ktime_us_delta(end, start);
1578 lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
1580 if (cache_hits != 0)
1581 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_HIT,
1583 if (cache_misses != 0)
1584 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_MISS,
1586 if (cache_hits + cache_misses != 0)
1587 lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
1588 cache_hits + cache_misses);
1590 if (iobuf->dr_npages) {
1591 rc = osd_ldiskfs_map_inode_pages(inode, iobuf, osd, 0,
1594 rc = osd_do_bio(osd, inode, iobuf, 0, 0);
1596 /* IO stats will be done in osd_bufs_put() */
1598 /* early release to let others read data during the bulk */
1599 for (i = 0; i < iobuf->dr_npages; i++) {
1600 LASSERT(PageLocked(iobuf->dr_pages[i]));
1601 if (!PagePrivate2(iobuf->dr_pages[i]))
1602 unlock_page(iobuf->dr_pages[i]);
1610 * XXX: Another layering violation for now.
1612 * We don't want to use ->f_op->read methods, because generic file write
1614 * - serializes on ->i_sem, and
1616 * - does a lot of extra work like balance_dirty_pages(),
1618 * which doesn't work for globally shared files like /last_rcvd.
1620 static int osd_ldiskfs_readlink(struct inode *inode, char *buffer, int buflen)
1622 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
1624 memcpy(buffer, (char *)ei->i_data, buflen);
1629 int osd_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs)
1631 struct buffer_head *bh;
1632 unsigned long block;
1638 /* prevent reading after eof */
1639 spin_lock(&inode->i_lock);
1640 if (i_size_read(inode) < *offs + size) {
1641 loff_t diff = i_size_read(inode) - *offs;
1643 spin_unlock(&inode->i_lock);
1646 "size %llu is too short to read @%llu\n",
1647 i_size_read(inode), *offs);
1649 } else if (diff == 0) {
1655 spin_unlock(&inode->i_lock);
1658 blocksize = 1 << inode->i_blkbits;
1661 block = *offs >> inode->i_blkbits;
1662 boffs = *offs & (blocksize - 1);
1663 csize = min(blocksize - boffs, size);
1664 bh = __ldiskfs_bread(NULL, inode, block, 0);
1666 CERROR("%s: can't read %u@%llu on ino %lu: rc = %ld\n",
1667 osd_ino2name(inode), csize, *offs, inode->i_ino,
1673 memcpy(buf, bh->b_data + boffs, csize);
1676 memset(buf, 0, csize);
1686 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
1687 struct lu_buf *buf, loff_t *pos)
1689 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1692 /* Read small symlink from inode body as we need to maintain correct
1693 * on-disk symlinks for ldiskfs.
1695 if (S_ISLNK(dt->do_lu.lo_header->loh_attr)) {
1696 loff_t size = i_size_read(inode);
1698 if (buf->lb_len < size)
1701 if (size < sizeof(LDISKFS_I(inode)->i_data))
1702 rc = osd_ldiskfs_readlink(inode, buf->lb_buf, size);
1704 rc = osd_ldiskfs_read(inode, buf->lb_buf, size, pos);
1706 rc = osd_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
1712 static inline int osd_extents_enabled(struct super_block *sb,
1713 struct inode *inode)
1715 if (inode != NULL) {
1716 if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL)
1718 } else if (ldiskfs_has_feature_extents(sb)) {
1724 int osd_calc_bkmap_credits(struct super_block *sb, struct inode *inode,
1725 const loff_t size, const loff_t pos,
1728 int credits, bits, bs, i;
1730 bits = sb->s_blocksize_bits;
1733 /* legacy blockmap: 3 levels * 3 (bitmap,gd,itself)
1734 * we do not expect blockmaps on the large files,
1735 * so let's shrink it to 2 levels (4GB files)
1738 /* this is default reservation: 2 levels */
1739 credits = (blocks + 2) * 3;
1741 /* actual offset is unknown, hard to optimize */
1745 /* now check for few specific cases to optimize */
1746 if (pos + size <= LDISKFS_NDIR_BLOCKS * bs) {
1749 /* allocate if not allocated */
1750 if (inode == NULL) {
1751 credits += blocks * 2;
1754 for (i = (pos >> bits); i < (pos >> bits) + blocks; i++) {
1755 LASSERT(i < LDISKFS_NDIR_BLOCKS);
1756 if (LDISKFS_I(inode)->i_data[i] == 0)
1759 } else if (pos + size <= (LDISKFS_NDIR_BLOCKS + 1024) * bs) {
1760 /* single indirect */
1761 credits = blocks * 3;
1762 if (inode == NULL ||
1763 LDISKFS_I(inode)->i_data[LDISKFS_IND_BLOCK] == 0)
1766 /* The indirect block may be modified. */
1773 static ssize_t osd_declare_write(const struct lu_env *env, struct dt_object *dt,
1774 const struct lu_buf *buf, loff_t _pos,
1775 struct thandle *handle)
1777 struct osd_object *obj = osd_dt_obj(dt);
1778 struct inode *inode = obj->oo_inode;
1779 struct super_block *sb = osd_sb(osd_obj2dev(obj));
1780 struct osd_thandle *oh;
1781 int rc = 0, est = 0, credits, blocks, allocated = 0;
1787 LASSERT(buf != NULL);
1788 LASSERT(handle != NULL);
1790 oh = container_of(handle, struct osd_thandle, ot_super);
1791 LASSERT(oh->ot_handle == NULL);
1794 bits = sb->s_blocksize_bits;
1797 if (osd_tx_was_declared(env, oh, dt, DTO_WRITE_BASE, _pos))
1801 /* if this is an append, then we
1802 * should expect cross-block record
1809 /* blocks to modify */
1810 blocks = ((pos + size + bs - 1) >> bits) - (pos >> bits);
1811 LASSERT(blocks > 0);
1813 if (inode != NULL && _pos != -1) {
1814 /* object size in blocks */
1815 est = (i_size_read(inode) + bs - 1) >> bits;
1816 allocated = inode->i_blocks >> (bits - 9);
1817 if (pos + size <= i_size_read(inode) && est <= allocated) {
1818 /* looks like an overwrite, no need to modify tree */
1820 /* no need to modify i_size */
1825 if (osd_extents_enabled(sb, inode)) {
1827 * many concurrent threads may grow tree by the time
1828 * our transaction starts. so, consider 2 is a min depth
1829 * for every level we may need to allocate a new block
1830 * and take some entries from the old one. so, 3 blocks
1831 * to allocate (bitmap, gd, itself) + old block - 4 per
1834 depth = inode != NULL ? ext_depth(inode) : 0;
1835 depth = min(max(depth, 1) + 3, LDISKFS_MAX_EXTENT_DEPTH);
1837 /* if not append, then split may need to modify
1838 * existing blocks moving entries into the new ones
1842 /* blocks to store data: bitmap,gd,itself */
1843 credits += blocks * 3;
1845 credits = osd_calc_bkmap_credits(sb, inode, size, _pos, blocks);
1847 /* if inode is created as part of the transaction,
1848 * then it's counted already by the creation method
1855 osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
1857 /* dt_declare_write() is usually called for system objects, such
1858 * as llog or last_rcvd files. We needn't enforce quota on those
1859 * objects, so always set the lqi_space as 0.
1862 rc = osd_declare_inode_qid(env, i_uid_read(inode),
1864 i_projid_read(inode), 0,
1865 oh, obj, NULL, OSD_QID_BLK);
1868 rc = osd_trunc_lock(obj, oh, true);
1873 static int osd_ldiskfs_writelink(struct inode *inode, char *buffer, int buflen)
1875 /* LU-2634: clear the extent format for fast symlink */
1876 ldiskfs_clear_inode_flag(inode, LDISKFS_INODE_EXTENTS);
1878 /* Copying the NUL byte terminating the link target as well */
1879 memcpy((char *)&LDISKFS_I(inode)->i_data, (char *)buffer, buflen + 1);
1880 spin_lock(&inode->i_lock);
1881 LDISKFS_I(inode)->i_disksize = buflen;
1882 i_size_write(inode, buflen);
1883 spin_unlock(&inode->i_lock);
1884 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
1889 static int osd_ldiskfs_write_record(struct dt_object *dt, void *buf,
1890 int bufsize, int write_NUL, loff_t *offs,
1893 struct inode *inode = osd_dt_obj(dt)->oo_inode;
1894 struct buffer_head *bh = NULL;
1895 loff_t offset = *offs;
1896 loff_t new_size = i_size_read(inode);
1897 unsigned long block;
1898 int blocksize = 1 << inode->i_blkbits;
1899 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
1903 int dirty_inode = 0;
1904 bool create, sparse, sync = false;
1908 * long symlink write does not count the NUL terminator in
1909 * bufsize, we write it, and the inode's file size does not
1910 * count the NUL terminator as well.
1912 ((char *)buf)[bufsize] = '\0';
1916 /* only the first flag-set matters */
1917 dirty_inode = !test_and_set_bit(LDISKFS_INODE_JOURNAL_DATA,
1920 /* sparse checking is racy, but sparse is very rare case, leave as is */
1921 sparse = (new_size > 0 && (inode->i_blocks >> (inode->i_blkbits - 9)) <
1922 ((new_size - 1) >> inode->i_blkbits) + 1);
1924 while (bufsize > 0) {
1925 int credits = handle->h_buffer_credits;
1926 unsigned long last_block = (new_size == 0) ? 0 :
1927 (new_size - 1) >> inode->i_blkbits;
1932 block = offset >> inode->i_blkbits;
1933 boffs = offset & (blocksize - 1);
1934 size = min(blocksize - boffs, bufsize);
1935 sync = (block > last_block || new_size == 0 || sparse);
1938 down(&ei->i_append_sem);
1940 bh = __ldiskfs_bread(handle, inode, block, 0);
1942 if (unlikely(IS_ERR_OR_NULL(bh) && !sync))
1944 "%s: adding bh without locking off %llu (block %lu, size %d, offs %llu)\n",
1945 osd_ino2name(inode),
1946 offset, block, bufsize, *offs);
1948 if (IS_ERR_OR_NULL(bh)) {
1949 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1950 int flags = LDISKFS_GET_BLOCKS_CREATE;
1952 /* while the file system is being mounted, avoid
1953 * preallocation otherwise mount can take a long
1954 * time as mballoc cache is cold.
1955 * XXX: this is a workaround until we have a proper
1957 * XXX: works with extent-based files only */
1958 if (!osd->od_cl_seq)
1959 flags |= LDISKFS_GET_BLOCKS_NO_NORMALIZE;
1960 bh = __ldiskfs_bread(handle, inode, block, flags);
1964 up(&ei->i_append_sem);
1969 if (IS_ERR_OR_NULL(bh)) {
1978 "%s: error reading offset %llu (block %lu, size %d, offs %llu), credits %d/%d: rc = %d\n",
1979 osd_ino2name(inode), offset, block, bufsize,
1980 *offs, credits, handle->h_buffer_credits, err);
1984 err = osd_ldiskfs_journal_get_write_access(handle, inode->i_sb,
1988 CERROR("journal_get_write_access() returned error %d\n",
1992 LASSERTF(boffs + size <= bh->b_size,
1993 "boffs %d size %d bh->b_size %lu\n",
1994 boffs, size, (unsigned long)bh->b_size);
1996 memset(bh->b_data, 0, bh->b_size);
1998 up(&ei->i_append_sem);
2002 memcpy(bh->b_data + boffs, buf, size);
2003 err = ldiskfs_handle_dirty_metadata(handle, NULL, bh);
2007 if (offset + size > new_size)
2008 new_size = offset + size;
2014 up(&ei->i_append_sem);
2021 /* correct in-core and on-disk sizes */
2022 if (new_size > i_size_read(inode)) {
2023 spin_lock(&inode->i_lock);
2024 if (new_size > i_size_read(inode))
2025 i_size_write(inode, new_size);
2026 if (i_size_read(inode) > ei->i_disksize) {
2027 ei->i_disksize = i_size_read(inode);
2030 spin_unlock(&inode->i_lock);
2033 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
2040 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
2041 const struct lu_buf *buf, loff_t *pos,
2042 struct thandle *handle)
2044 struct inode *inode = osd_dt_obj(dt)->oo_inode;
2045 struct osd_thandle *oh;
2049 LASSERT(dt_object_exists(dt));
2051 LASSERT(handle != NULL);
2052 LASSERT(inode != NULL);
2053 dquot_initialize(inode);
2055 /* XXX: don't check: one declared chunk can be used many times */
2056 /* osd_trans_exec_op(env, handle, OSD_OT_WRITE); */
2058 oh = container_of(handle, struct osd_thandle, ot_super);
2059 LASSERT(oh->ot_handle->h_transaction != NULL);
2060 osd_trans_exec_op(env, handle, OSD_OT_WRITE);
2062 /* Write small symlink to inode body as we need to maintain correct
2063 * on-disk symlinks for ldiskfs.
2064 * Note: the buf->lb_buf contains a NUL terminator while buf->lb_len
2065 * does not count it in.
2067 is_link = S_ISLNK(dt->do_lu.lo_header->loh_attr);
2068 if (is_link && (buf->lb_len < sizeof(LDISKFS_I(inode)->i_data)))
2069 result = osd_ldiskfs_writelink(inode, buf->lb_buf, buf->lb_len);
2071 result = osd_ldiskfs_write_record(dt, buf->lb_buf, buf->lb_len,
2072 is_link, pos, oh->ot_handle);
2074 result = buf->lb_len;
2076 osd_trans_exec_check(env, handle, OSD_OT_WRITE);
2081 static int osd_declare_fallocate(const struct lu_env *env,
2082 struct dt_object *dt, __u64 start, __u64 end,
2083 int mode, struct thandle *th)
2085 struct osd_thandle *oh = container_of(th, struct osd_thandle, ot_super);
2086 struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
2087 struct inode *inode = osd_dt_obj(dt)->oo_inode;
2088 long long quota_space = 0;
2089 /* 5 is max tree depth. (inode + 4 index blocks) */
2096 * mode == 0 (which is standard prealloc) and PUNCH is supported
2097 * Rest of mode options is not supported yet.
2099 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2100 RETURN(-EOPNOTSUPP);
2102 /* disable fallocate completely */
2103 if (osd_dev(dt->do_lu.lo_dev)->od_fallocate_zero_blocks < 0)
2104 RETURN(-EOPNOTSUPP);
2109 if (mode & FALLOC_FL_PUNCH_HOLE) {
2110 rc = osd_declare_inode_qid(env, i_uid_read(inode),
2112 i_projid_read(inode), 0, oh,
2113 osd_dt_obj(dt), NULL, OSD_QID_BLK);
2115 rc = osd_trunc_lock(osd_dt_obj(dt), oh, false);
2119 /* quota space for metadata blocks
2120 * approximate metadata estimate should be good enough.
2122 quota_space += PAGE_SIZE;
2123 quota_space += depth * LDISKFS_BLOCK_SIZE(osd_sb(osd));
2125 /* quota space should be reported in 1K blocks */
2126 quota_space = toqb(quota_space) + toqb(end - start) +
2127 LDISKFS_META_TRANS_BLOCKS(inode->i_sb);
2129 /* We don't need to reserve credits for whole fallocate here.
2130 * We reserve space only for metadata. Fallocate credits are
2131 * extended as required
2133 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2134 i_projid_read(inode), quota_space, oh,
2135 osd_dt_obj(dt), NULL, OSD_QID_BLK);
2139 static int osd_fallocate_preallocate(const struct lu_env *env,
2140 struct dt_object *dt,
2141 __u64 start, __u64 end, int mode,
2144 struct osd_thandle *oh = container_of(th, struct osd_thandle, ot_super);
2145 handle_t *handle = ldiskfs_journal_current_handle();
2146 unsigned int save_credits = oh->ot_credits;
2147 struct osd_object *obj = osd_dt_obj(dt);
2148 struct inode *inode = obj->oo_inode;
2149 struct ldiskfs_map_blocks map;
2150 unsigned int credits;
2151 ldiskfs_lblk_t blen;
2152 ldiskfs_lblk_t boff;
2153 loff_t new_size = 0;
2160 LASSERT(dt_object_exists(dt));
2161 LASSERT(osd_invariant(obj));
2162 LASSERT(inode != NULL);
2164 CDEBUG(D_INODE, "fallocate: inode #%lu: start %llu end %llu mode %d\n",
2165 inode->i_ino, start, end, mode);
2167 dquot_initialize(inode);
2171 boff = osd_i_blocks(inode, start);
2172 blen = osd_i_blocks(inode, ALIGN(end, 1 << inode->i_blkbits)) - boff;
2174 /* Create and mark new extents as either zero or unwritten */
2175 flags = (osd_dev(dt->do_lu.lo_dev)->od_fallocate_zero_blocks ||
2176 !ldiskfs_test_inode_flag(inode, LDISKFS_INODE_EXTENTS)) ?
2177 LDISKFS_GET_BLOCKS_CREATE_ZERO :
2178 LDISKFS_GET_BLOCKS_CREATE_UNWRIT_EXT;
2179 #ifdef LDISKFS_GET_BLOCKS_KEEP_SIZE
2180 if (mode & FALLOC_FL_KEEP_SIZE)
2181 flags |= LDISKFS_GET_BLOCKS_KEEP_SIZE;
2185 if (!(mode & FALLOC_FL_KEEP_SIZE) && (end > i_size_read(inode) ||
2186 end > LDISKFS_I(inode)->i_disksize)) {
2188 rc = inode_newsize_ok(inode, new_size);
2193 inode_dio_wait(inode);
2198 /* Don't normalize the request if it can fit in one extent so
2199 * that it doesn't get unnecessarily split into multiple extents.
2201 if (blen <= EXT_UNWRITTEN_MAX_LEN)
2202 flags |= LDISKFS_GET_BLOCKS_NO_NORMALIZE;
2205 * credits to insert 1 extent into extent tree.
2207 credits = ldiskfs_chunk_trans_blocks(inode, blen);
2208 depth = ext_depth(inode);
2210 while (rc >= 0 && blen) {
2214 * Recalculate credits when extent tree depth changes.
2216 if (depth != ext_depth(inode)) {
2217 credits = ldiskfs_chunk_trans_blocks(inode, blen);
2218 depth = ext_depth(inode);
2221 /* TODO: quota check */
2222 rc = osd_extend_restart_trans(handle, credits, inode);
2226 rc = ldiskfs_map_blocks(handle, inode, &map, flags);
2229 "inode #%lu: block %u: len %u: ldiskfs_map_blocks returned %d\n",
2230 inode->i_ino, map.m_lblk, map.m_len, rc);
2231 ldiskfs_mark_inode_dirty(handle, inode);
2236 map.m_len = blen = blen - rc;
2237 epos = (loff_t)map.m_lblk << inode->i_blkbits;
2238 inode->i_ctime = current_time(inode);
2242 if (ldiskfs_update_inode_size(inode, epos) & 0x1)
2243 inode->i_mtime = inode->i_ctime;
2244 #ifdef LDISKFS_EOFBLOCKS_FL
2246 if (epos > inode->i_size)
2247 ldiskfs_set_inode_flag(inode,
2248 LDISKFS_INODE_EOFBLOCKS);
2252 ldiskfs_mark_inode_dirty(handle, inode);
2256 /* extand credits if needed for operations such as attribute set */
2258 rc = osd_extend_restart_trans(handle, save_credits, inode);
2260 inode_unlock(inode);
2265 static int osd_fallocate_punch(const struct lu_env *env, struct dt_object *dt,
2266 __u64 start, __u64 end, int mode,
2269 struct osd_object *obj = osd_dt_obj(dt);
2270 struct inode *inode = obj->oo_inode;
2271 struct osd_access_lock *al;
2272 struct osd_thandle *oh;
2273 int rc = 0, found = 0;
2277 LASSERT(dt_object_exists(dt));
2278 LASSERT(osd_invariant(obj));
2279 LASSERT(inode != NULL);
2281 dquot_initialize(inode);
2284 oh = container_of(th, struct osd_thandle, ot_super);
2285 LASSERT(oh->ot_handle->h_transaction != NULL);
2287 list_for_each_entry(al, &oh->ot_trunc_locks, tl_list) {
2288 if (obj != al->tl_obj)
2290 LASSERT(al->tl_shared == 0);
2292 /* do actual punch in osd_trans_stop() */
2293 al->tl_start = start;
2296 al->tl_punch = true;
2303 static int osd_fallocate(const struct lu_env *env, struct dt_object *dt,
2304 __u64 start, __u64 end, int mode, struct thandle *th)
2310 if (mode & FALLOC_FL_PUNCH_HOLE) {
2312 rc = osd_fallocate_punch(env, dt, start, end, mode, th);
2314 /* standard preallocate */
2315 rc = osd_fallocate_preallocate(env, dt, start, end, mode, th);
2320 static int osd_declare_punch(const struct lu_env *env, struct dt_object *dt,
2321 __u64 start, __u64 end, struct thandle *th)
2323 struct osd_thandle *oh;
2324 struct osd_object *obj = osd_dt_obj(dt);
2325 struct inode *inode;
2330 oh = container_of(th, struct osd_thandle, ot_super);
2333 * we don't need to reserve credits for whole truncate
2334 * it's not possible as truncate may need to free too many
2335 * blocks and that won't fit a single transaction. instead
2336 * we reserve credits to change i_size and put inode onto
2337 * orphan list. if needed truncate will extend or restart
2340 osd_trans_declare_op(env, oh, OSD_OT_PUNCH,
2341 osd_dto_credits_noquota[DTO_ATTR_SET_BASE] + 3);
2343 inode = obj->oo_inode;
2346 rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2347 i_projid_read(inode), 0, oh, obj,
2350 /* if object holds encrypted content, we need to make sure we truncate
2351 * on an encryption unit boundary, or subsequent reads will get
2355 if (obj->oo_lma_flags & LUSTRE_ENCRYPT_FL &&
2356 start & ~LUSTRE_ENCRYPTION_MASK)
2357 start = (start & LUSTRE_ENCRYPTION_MASK) +
2358 LUSTRE_ENCRYPTION_UNIT_SIZE;
2359 ll_truncate_pagecache(inode, start);
2360 rc = osd_trunc_lock(obj, oh, false);
2366 static int osd_punch(const struct lu_env *env, struct dt_object *dt,
2367 __u64 start, __u64 end, struct thandle *th)
2369 struct osd_object *obj = osd_dt_obj(dt);
2370 struct osd_device *osd = osd_obj2dev(obj);
2371 struct inode *inode = obj->oo_inode;
2372 struct osd_access_lock *al;
2373 struct osd_thandle *oh;
2374 int rc = 0, found = 0;
2378 LASSERT(dt_object_exists(dt));
2379 LASSERT(osd_invariant(obj));
2380 LASSERT(inode != NULL);
2381 dquot_initialize(inode);
2384 oh = container_of(th, struct osd_thandle, ot_super);
2385 LASSERT(oh->ot_handle->h_transaction != NULL);
2387 /* we used to skip truncate to current size to
2388 * optimize truncates on OST. with DoM we can
2389 * get attr_set to set specific size (MDS_REINT)
2390 * and then get truncate RPC which essentially
2391 * would be skipped. this is bad.. so, disable
2392 * this optimization on MDS till the client stop
2393 * to sent MDS_REINT (LU-11033) -bzzz
2395 if (osd->od_is_ost && i_size_read(inode) == start)
2398 osd_trans_exec_op(env, th, OSD_OT_PUNCH);
2400 spin_lock(&inode->i_lock);
2401 if (i_size_read(inode) < start)
2403 i_size_write(inode, start);
2404 spin_unlock(&inode->i_lock);
2406 /* optimize grow case */
2408 osd_execute_truncate(obj);
2413 /* add to orphan list to ensure truncate completion
2414 * if this transaction succeed. ldiskfs_truncate()
2415 * will take the inode out of the list
2417 rc = ldiskfs_orphan_add(oh->ot_handle, inode);
2418 inode_unlock(inode);
2422 list_for_each_entry(al, &oh->ot_trunc_locks, tl_list) {
2423 if (obj != al->tl_obj)
2425 LASSERT(al->tl_shared == 0);
2427 /* do actual truncate in osd_trans_stop() */
2428 al->tl_truncate = 1;
2437 static int fiemap_check_ranges(struct inode *inode,
2438 u64 start, u64 len, u64 *new_len)
2447 if (ldiskfs_test_inode_flag(inode, LDISKFS_INODE_EXTENTS))
2448 maxbytes = inode->i_sb->s_maxbytes;
2450 maxbytes = LDISKFS_SB(inode->i_sb)->s_bitmap_maxbytes;
2452 if (start > maxbytes)
2456 * Shrink request scope to what the fs can actually handle.
2458 if (len > maxbytes || (maxbytes - len) < start)
2459 *new_len = maxbytes - start;
2464 /* So that the fiemap access checks can't overflow on 32 bit machines. */
2465 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
2467 static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
2470 struct fiemap_extent_info fieinfo = {0, };
2471 struct inode *inode = osd_dt_obj(dt)->oo_inode;
2474 DECLARE_MM_SEGMENT_T(saved_fs);
2477 if (inode->i_op->fiemap == NULL)
2480 if (fm->fm_extent_count > FIEMAP_MAX_EXTENTS)
2483 rc = fiemap_check_ranges(inode, fm->fm_start, fm->fm_length, &len);
2487 fieinfo.fi_flags = fm->fm_flags;
2488 fieinfo.fi_extents_max = fm->fm_extent_count;
2489 fieinfo.fi_extents_start = fm->fm_extents;
2491 if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
2492 filemap_write_and_wait(inode->i_mapping);
2494 access_set_kernel(saved_fs, &fieinfo);
2495 rc = inode->i_op->fiemap(inode, &fieinfo, fm->fm_start, len);
2496 access_unset_kernel(saved_fs, &fieinfo);
2497 fm->fm_flags = fieinfo.fi_flags;
2498 fm->fm_mapped_extents = fieinfo.fi_extents_mapped;
2503 static int osd_ladvise(const struct lu_env *env, struct dt_object *dt,
2504 __u64 start, __u64 end, enum lu_ladvise_type advice)
2506 struct osd_object *obj = osd_dt_obj(dt);
2511 case LU_LADVISE_DONTNEED:
2513 invalidate_mapping_pages(obj->oo_inode->i_mapping,
2514 start >> PAGE_SHIFT,
2515 (end - 1) >> PAGE_SHIFT);
2525 static loff_t osd_lseek(const struct lu_env *env, struct dt_object *dt,
2526 loff_t offset, int whence)
2528 struct osd_object *obj = osd_dt_obj(dt);
2529 struct osd_device *dev = osd_obj2dev(obj);
2530 struct inode *inode = obj->oo_inode;
2535 LASSERT(dt_object_exists(dt));
2536 LASSERT(osd_invariant(obj));
2538 LASSERT(offset >= 0);
2540 file = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
2543 RETURN(PTR_ERR(file));
2545 file->f_mode |= FMODE_64BITHASH;
2546 result = file->f_op->llseek(file, offset, whence);
2550 * If 'offset' is beyond end of object file then treat it as not error
2551 * but valid case for SEEK_HOLE and return 'offset' as result.
2552 * LOV will decide if it is beyond real end of file or not.
2554 if (whence == SEEK_HOLE && result == -ENXIO)
2557 CDEBUG(D_INFO, "seek %s from %lld: %lld\n", whence == SEEK_HOLE ?
2558 "hole" : "data", offset, result);
2563 * in some cases we may need declare methods for objects being created
2564 * e.g., when we create symlink
2566 const struct dt_body_operations osd_body_ops_new = {
2567 .dbo_declare_write = osd_declare_write,
2570 const struct dt_body_operations osd_body_ops = {
2571 .dbo_read = osd_read,
2572 .dbo_declare_write = osd_declare_write,
2573 .dbo_write = osd_write,
2574 .dbo_bufs_get = osd_bufs_get,
2575 .dbo_bufs_put = osd_bufs_put,
2576 .dbo_write_prep = osd_write_prep,
2577 .dbo_declare_write_commit = osd_declare_write_commit,
2578 .dbo_write_commit = osd_write_commit,
2579 .dbo_read_prep = osd_read_prep,
2580 .dbo_declare_punch = osd_declare_punch,
2581 .dbo_punch = osd_punch,
2582 .dbo_fiemap_get = osd_fiemap_get,
2583 .dbo_ladvise = osd_ladvise,
2584 .dbo_declare_fallocate = osd_declare_fallocate,
2585 .dbo_fallocate = osd_fallocate,
2586 .dbo_lseek = osd_lseek,
2590 * Get a truncate lock
2592 * In order to take multi-transaction truncate out of main transaction we let
2593 * the caller grab a lock on the object passed. the lock can be shared (for
2594 * writes) and exclusive (for truncate). It's not allowed to mix truncate
2595 * and write in the same transaction handle (do not confuse with big ldiskfs
2596 * transaction containing lots of handles).
2597 * The lock must be taken at declaration.
2599 * \param obj object to lock
2601 * \shared shared or exclusive
2603 * \retval 0 lock is granted
2604 * \retval -NOMEM no memory to allocate lock
2606 int osd_trunc_lock(struct osd_object *obj, struct osd_thandle *oh, bool shared)
2608 struct osd_access_lock *al, *tmp;
2613 list_for_each_entry(tmp, &oh->ot_trunc_locks, tl_list) {
2614 if (tmp->tl_obj != obj)
2616 LASSERT(tmp->tl_shared == shared);
2617 /* found same lock */
2622 if (unlikely(al == NULL))
2625 al->tl_truncate = false;
2627 down_read(&obj->oo_ext_idx_sem);
2629 down_write(&obj->oo_ext_idx_sem);
2630 al->tl_shared = shared;
2631 lu_object_get(&obj->oo_dt.do_lu);
2633 list_add(&al->tl_list, &oh->ot_trunc_locks);
2638 void osd_trunc_unlock_all(const struct lu_env *env, struct list_head *list)
2640 struct osd_access_lock *al, *tmp;
2642 list_for_each_entry_safe(al, tmp, list, tl_list) {
2644 up_read(&al->tl_obj->oo_ext_idx_sem);
2646 up_write(&al->tl_obj->oo_ext_idx_sem);
2647 osd_object_put(env, al->tl_obj);
2648 list_del(&al->tl_list);
2653 /* For a partial-page punch, flush punch range to disk immediately */
2654 static void osd_partial_page_flush_punch(struct osd_device *d,
2655 struct inode *inode, loff_t start,
2658 if (osd_use_page_cache(d)) {
2659 filemap_fdatawrite_range(inode->i_mapping, start, end);
2661 /* Notice we use "wait" version to ensure I/O is complete */
2662 filemap_write_and_wait_range(inode->i_mapping, start,
2664 invalidate_mapping_pages(inode->i_mapping, start >> PAGE_SHIFT,
2670 * For a partial-page truncate, flush the page to disk immediately to
2671 * avoid data corruption during direct disk write. b=17397
2673 static void osd_partial_page_flush(struct osd_device *d, struct inode *inode,
2676 if (!(offset & ~PAGE_MASK))
2679 if (osd_use_page_cache(d)) {
2680 filemap_fdatawrite_range(inode->i_mapping, offset, offset + 1);
2682 /* Notice we use "wait" version to ensure I/O is complete */
2683 filemap_write_and_wait_range(inode->i_mapping, offset,
2685 invalidate_mapping_pages(inode->i_mapping, offset >> PAGE_SHIFT,
2686 offset >> PAGE_SHIFT);
2690 void osd_execute_truncate(struct osd_object *obj)
2692 struct osd_device *d = osd_obj2dev(obj);
2693 struct inode *inode = obj->oo_inode;
2696 /* simulate crash before (in the middle) of delayed truncate */
2697 if (CFS_FAIL_CHECK(OBD_FAIL_OSD_FAIL_AT_TRUNCATE)) {
2698 struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
2699 struct ldiskfs_sb_info *sbi = LDISKFS_SB(inode->i_sb);
2701 mutex_lock(&sbi->s_orphan_lock);
2702 list_del_init(&ei->i_orphan);
2703 mutex_unlock(&sbi->s_orphan_lock);
2707 size = i_size_read(inode);
2709 /* if object holds encrypted content, we need to make sure we truncate
2710 * on an encryption unit boundary, or block content will get corrupted
2712 if (obj->oo_lma_flags & LUSTRE_ENCRYPT_FL &&
2713 size & ~LUSTRE_ENCRYPTION_MASK)
2714 inode->i_size = (size & LUSTRE_ENCRYPTION_MASK) +
2715 LUSTRE_ENCRYPTION_UNIT_SIZE;
2716 ldiskfs_truncate(inode);
2717 inode_unlock(inode);
2718 if (inode->i_size != size) {
2719 spin_lock(&inode->i_lock);
2720 i_size_write(inode, size);
2721 LDISKFS_I(inode)->i_disksize = size;
2722 spin_unlock(&inode->i_lock);
2723 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
2725 osd_partial_page_flush(d, inode, size);
2728 static int osd_execute_punch(const struct lu_env *env, struct osd_object *obj,
2729 loff_t start, loff_t end, int mode)
2731 struct osd_device *d = osd_obj2dev(obj);
2732 struct inode *inode = obj->oo_inode;
2736 file = alloc_file_pseudo(inode, d->od_mnt, "/", O_NOATIME,
2739 RETURN(PTR_ERR(file));
2741 file->f_mode |= FMODE_64BITHASH;
2742 rc = file->f_op->fallocate(file, mode, start, end - start);
2746 osd_partial_page_flush_punch(d, inode, start, end - 1);
2750 int osd_process_truncates(const struct lu_env *env, struct list_head *list)
2752 struct osd_access_lock *al;
2755 LASSERT(!journal_current_handle());
2757 list_for_each_entry(al, list, tl_list) {
2760 if (al->tl_truncate)
2761 osd_execute_truncate(al->tl_obj);
2762 else if (al->tl_punch)
2763 rc = osd_execute_punch(env, al->tl_obj, al->tl_start,
2764 al->tl_end, al->tl_mode);