1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdfilter/filter_io_26.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Andreas Dilger <adilger@clusterfs.com>
40 * Author: Phil Schwan <phil@clusterfs.com>
43 #ifndef AUTOCONF_INCLUDED
44 #include <linux/config.h>
46 #include <linux/module.h>
47 #include <linux/pagemap.h> // XXX kill me soon
48 #include <linux/version.h>
49 #include <linux/buffer_head.h>
51 #define DEBUG_SUBSYSTEM S_FILTER
53 #include <obd_class.h>
54 #include <lustre_fsfilt.h>
55 #include <lustre_quota.h>
56 #include "filter_internal.h"
58 /* 512byte block min */
59 #define MAX_BLOCKS_PER_PAGE (CFS_PAGE_SIZE / 512)
61 atomic_t dr_numreqs; /* number of reqs being processed */
62 wait_queue_head_t dr_wait;
66 struct page **dr_pages;
67 unsigned long *dr_blocks;
68 spinlock_t dr_lock; /* IRQ lock */
69 unsigned int dr_ignore_quota:1;
70 struct filter_obd *dr_filter;
73 static void record_start_io(struct filter_iobuf *iobuf, int rw, int size,
74 struct obd_export *exp)
76 struct filter_obd *filter = iobuf->dr_filter;
78 atomic_inc(&iobuf->dr_numreqs);
80 if (rw == OBD_BRW_READ) {
81 atomic_inc(&filter->fo_r_in_flight);
82 lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_R_RPC_HIST],
83 atomic_read(&filter->fo_r_in_flight));
84 lprocfs_oh_tally_log2(&filter->fo_filter_stats.hist[BRW_R_DISK_IOSIZE],
86 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_RPC_HIST],
87 atomic_read(&filter->fo_r_in_flight));
88 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_DISK_IOSIZE], size);
90 atomic_inc(&filter->fo_w_in_flight);
91 lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_W_RPC_HIST],
92 atomic_read(&filter->fo_w_in_flight));
93 lprocfs_oh_tally_log2(&filter->fo_filter_stats.hist[BRW_W_DISK_IOSIZE],
95 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_RPC_HIST],
96 atomic_read(&filter->fo_w_in_flight));
97 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_DISK_IOSIZE], size);
101 static void record_finish_io(struct filter_iobuf *iobuf, int rw, int rc)
103 struct filter_obd *filter = iobuf->dr_filter;
105 /* CAVEAT EMPTOR: possibly in IRQ context
106 * DO NOT record procfs stats here!!! */
108 if (rw == OBD_BRW_READ)
109 atomic_dec(&filter->fo_r_in_flight);
111 atomic_dec(&filter->fo_w_in_flight);
113 if (atomic_dec_and_test(&iobuf->dr_numreqs))
114 wake_up(&iobuf->dr_wait);
117 static int dio_complete_routine(struct bio *bio, unsigned int done, int error)
119 struct filter_iobuf *iobuf = bio->bi_private;
122 #ifdef HAVE_PAGE_CONSTANT
127 /* CAVEAT EMPTOR: possibly in IRQ context
128 * DO NOT record procfs stats here!!! */
130 if (bio->bi_size) /* Not complete */
134 CERROR("***** bio->bi_private is NULL! This should never "
135 "happen. Normally, I would crash here, but instead I "
136 "will dump the bio contents to the console. Please "
137 "report this to <http://bugzilla.lustre.org/> , along "
138 "with any interesting messages leading up to this point "
139 "(like SCSI errors, perhaps). Because bi_private is "
140 "NULL, I can't wake up the thread that initiated this "
141 "I/O -- so you will probably have to reboot this node.\n");
142 CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, "
143 "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, "
144 "bi_private: %p\n", bio->bi_next, bio->bi_flags,
145 bio->bi_rw, bio->bi_vcnt, bio->bi_idx, bio->bi_size,
146 bio->bi_end_io, atomic_read(&bio->bi_cnt),
151 #ifdef HAVE_PAGE_CONSTANT
152 bio_for_each_segment(bvl, bio, i)
153 ClearPageConstant(bvl->bv_page);
156 spin_lock_irqsave(&iobuf->dr_lock, flags);
157 if (iobuf->dr_error == 0)
158 iobuf->dr_error = error;
159 spin_unlock_irqrestore(&iobuf->dr_lock, flags);
161 record_finish_io(iobuf, test_bit(BIO_RW, &bio->bi_rw) ?
162 OBD_BRW_WRITE : OBD_BRW_READ, error);
164 /* Completed bios used to be chained off iobuf->dr_bios and freed in
165 * filter_clear_dreq(). It was then possible to exhaust the biovec-256
166 * mempool when serious on-disk fragmentation was encountered,
167 * deadlocking the OST. The bios are now released as soon as complete
168 * so the pool cannot be exhausted while IOs are competing. bug 10076 */
173 static int can_be_merged(struct bio *bio, sector_t sector)
180 size = bio->bi_size >> 9;
181 return bio->bi_sector + size == sector ? 1 : 0;
184 struct filter_iobuf *filter_alloc_iobuf(struct filter_obd *filter,
185 int rw, int num_pages)
187 struct filter_iobuf *iobuf;
189 LASSERTF(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ, "%x\n", rw);
191 OBD_ALLOC(iobuf, sizeof(*iobuf));
195 OBD_ALLOC(iobuf->dr_pages, num_pages * sizeof(*iobuf->dr_pages));
196 if (iobuf->dr_pages == NULL)
199 OBD_ALLOC(iobuf->dr_blocks,
200 MAX_BLOCKS_PER_PAGE * num_pages * sizeof(*iobuf->dr_blocks));
201 if (iobuf->dr_blocks == NULL)
204 iobuf->dr_filter = filter;
205 init_waitqueue_head(&iobuf->dr_wait);
206 atomic_set(&iobuf->dr_numreqs, 0);
207 spin_lock_init(&iobuf->dr_lock);
208 iobuf->dr_max_pages = num_pages;
209 iobuf->dr_npages = 0;
215 OBD_FREE(iobuf->dr_pages,
216 num_pages * sizeof(*iobuf->dr_pages));
218 OBD_FREE(iobuf, sizeof(*iobuf));
220 RETURN(ERR_PTR(-ENOMEM));
223 static void filter_clear_iobuf(struct filter_iobuf *iobuf)
225 iobuf->dr_npages = 0;
227 atomic_set(&iobuf->dr_numreqs, 0);
230 void filter_free_iobuf(struct filter_iobuf *iobuf)
232 int num_pages = iobuf->dr_max_pages;
234 filter_clear_iobuf(iobuf);
236 OBD_FREE(iobuf->dr_blocks,
237 MAX_BLOCKS_PER_PAGE * num_pages * sizeof(*iobuf->dr_blocks));
238 OBD_FREE(iobuf->dr_pages,
239 num_pages * sizeof(*iobuf->dr_pages));
243 void filter_iobuf_put(struct filter_obd *filter, struct filter_iobuf *iobuf,
244 struct obd_trans_info *oti)
246 int thread_id = oti ? oti->oti_thread_id : -1;
248 if (unlikely(thread_id < 0)) {
249 filter_free_iobuf(iobuf);
253 LASSERTF(filter->fo_iobuf_pool[thread_id] == iobuf,
254 "iobuf mismatch for thread %d: pool %p iobuf %p\n",
255 thread_id, filter->fo_iobuf_pool[thread_id], iobuf);
256 filter_clear_iobuf(iobuf);
259 int filter_iobuf_add_page(struct obd_device *obd, struct filter_iobuf *iobuf,
260 struct inode *inode, struct page *page)
262 LASSERT(iobuf->dr_npages < iobuf->dr_max_pages);
263 iobuf->dr_pages[iobuf->dr_npages++] = page;
268 int filter_do_bio(struct obd_export *exp, struct inode *inode,
269 struct filter_iobuf *iobuf, int rw)
271 struct obd_device *obd = exp->exp_obd;
272 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
273 struct page **pages = iobuf->dr_pages;
274 int npages = iobuf->dr_npages;
275 unsigned long *blocks = iobuf->dr_blocks;
276 int total_blocks = npages * blocks_per_page;
277 int sector_bits = inode->i_sb->s_blocksize_bits - 9;
278 unsigned int blocksize = inode->i_sb->s_blocksize;
279 struct bio *bio = NULL;
281 unsigned long start_time = jiffies;
283 unsigned int page_offset;
292 LASSERT(iobuf->dr_npages == npages);
293 LASSERT(total_blocks <= OBDFILTER_CREATED_SCRATCHPAD_ENTRIES);
295 for (page_idx = 0, block_idx = 0;
297 page_idx++, block_idx += blocks_per_page) {
299 page = pages[page_idx];
300 LASSERT (block_idx + blocks_per_page <= total_blocks);
302 for (i = 0, page_offset = 0;
304 i += nblocks, page_offset += blocksize * nblocks) {
308 if (blocks[block_idx + i] == 0) { /* hole */
309 LASSERT(rw == OBD_BRW_READ);
310 memset(kmap(page) + page_offset, 0, blocksize);
315 sector = (sector_t)blocks[block_idx + i] << sector_bits;
317 /* Additional contiguous file blocks? */
318 while (i + nblocks < blocks_per_page &&
319 (sector + (nblocks << sector_bits)) ==
320 ((sector_t)blocks[block_idx + i + nblocks] <<
324 #ifdef HAVE_PAGE_CONSTANT
325 /* I only set the page to be constant only if it
326 * is mapped to a contiguous underlying disk block(s).
327 * It will then make sure the corresponding device
328 * cache of raid5 will be overwritten by this page.
330 if ((rw == OBD_BRW_WRITE) &&
331 (nblocks == blocks_per_page) &&
332 mapping_cap_page_constant_write(inode->i_mapping))
333 SetPageConstant(page);
337 can_be_merged(bio, sector) &&
338 bio_add_page(bio, page,
339 blocksize * nblocks, page_offset) != 0)
340 continue; /* added this frag OK */
344 bdev_get_queue(bio->bi_bdev);
346 /* Dang! I have to fragment this I/O */
347 CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) "
348 "sectors %d(%d) psg %d(%d) hsg %d(%d)\n",
350 bio->bi_vcnt, bio->bi_max_vecs,
351 bio->bi_size >> 9, q->max_sectors,
352 bio_phys_segments(q, bio),
353 q->max_phys_segments,
354 bio_hw_segments(q, bio),
357 record_start_io(iobuf, rw, bio->bi_size, exp);
358 rc = fsfilt_send_bio(rw, obd, inode, bio);
360 CERROR("Can't send bio: %d\n", rc);
361 record_finish_io(iobuf, rw, rc);
367 /* allocate new bio */
368 bio = bio_alloc(GFP_NOIO,
369 (npages - page_idx) * blocks_per_page);
371 CERROR("Can't allocate bio %u*%u = %u pages\n",
372 (npages - page_idx), blocks_per_page,
373 (npages - page_idx) * blocks_per_page);
378 bio->bi_bdev = inode->i_sb->s_bdev;
379 bio->bi_sector = sector;
380 bio->bi_end_io = dio_complete_routine;
381 bio->bi_private = iobuf;
383 rc = bio_add_page(bio, page,
384 blocksize * nblocks, page_offset);
390 record_start_io(iobuf, rw, bio->bi_size, exp);
391 rc = fsfilt_send_bio(rw, obd, inode, bio);
396 CERROR("Can't send bio: %d\n", rc);
397 record_finish_io(iobuf, rw, rc);
402 wait_event(iobuf->dr_wait, atomic_read(&iobuf->dr_numreqs) == 0);
404 if (rw == OBD_BRW_READ) {
405 lprocfs_oh_tally(&obd->u.filter.fo_filter_stats.hist[BRW_R_DIO_FRAGS],
407 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_DIO_FRAGS],
409 lprocfs_oh_tally_log2(&obd->u.filter.fo_filter_stats.hist[BRW_R_IO_TIME],
410 jiffies - start_time);
411 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_IO_TIME], jiffies - start_time);
412 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) {
413 lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_R_DIO_FRAGS],
415 lprocfs_oh_tally_log2(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_R_IO_TIME],
416 jiffies - start_time);
419 lprocfs_oh_tally(&obd->u.filter.fo_filter_stats.hist[BRW_W_DIO_FRAGS],
421 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_DIO_FRAGS],
423 lprocfs_oh_tally_log2(&obd->u.filter.fo_filter_stats.hist[BRW_W_IO_TIME],
424 jiffies - start_time);
425 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_IO_TIME], jiffies - start_time);
426 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) {
427 lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_W_DIO_FRAGS],
429 lprocfs_oh_tally_log2(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_W_IO_TIME],
430 jiffies - start_time);
435 rc = iobuf->dr_error;
439 /* These are our hacks to keep our directio/bh IO coherent with ext3's
440 * page cache use. Most notably ext3 reads file data into the page
441 * cache when it is zeroing the tail of partial-block truncates and
442 * leaves it there, sometimes generating io from it at later truncates.
443 * This removes the partial page and its buffers from the page cache,
444 * so it should only ever cause a wait in rare cases, as otherwise we
445 * always do full-page IO to the OST.
447 * The call to truncate_complete_page() will call journal_invalidatepage()
448 * to free the buffers and drop the page from cache. The buffers should
449 * not be dirty, because we already called fdatasync/fdatawait on them.
451 static int filter_sync_inode_data(struct inode *inode, int locked)
455 /* This is nearly do_fsync(), without the waiting on the inode */
456 /* XXX: in 2.6.16 (at least) we don't need to hold i_mutex over
457 * filemap_fdatawrite() and filemap_fdatawait(), so we may no longer
458 * need this lock here at all. */
460 LOCK_INODE_MUTEX(inode);
461 if (inode->i_mapping->nrpages) {
463 current->flags |= PF_SYNCWRITE;
465 rc = filemap_fdatawrite(inode->i_mapping);
467 rc = filemap_fdatawait(inode->i_mapping);
469 current->flags &= ~PF_SYNCWRITE;
473 UNLOCK_INODE_MUTEX(inode);
477 /* Clear pages from the mapping before we do direct IO to that offset.
478 * Now that the only source of such pages in the truncate path flushes
479 * these pages to disk and then discards them, this is error condition.
480 * If add back read cache this will happen again. This could be disabled
481 * until that time if we never see the below error. */
482 static int filter_clear_page_cache(struct inode *inode,
483 struct filter_iobuf *iobuf)
488 rc = filter_sync_inode_data(inode, 0);
492 /* be careful to call this after fsync_inode_data_buffers has waited
493 * for IO to complete before we evict it from the cache */
494 for (i = 0; i < iobuf->dr_npages; i++) {
495 page = find_lock_page(inode->i_mapping,
496 iobuf->dr_pages[i]->index);
499 if (page->mapping != NULL) {
500 CERROR("page %lu (%d/%d) in page cache during write!\n",
501 page->index, i, iobuf->dr_npages);
502 wait_on_page_writeback(page);
503 ll_truncate_complete_page(page);
507 page_cache_release(page);
513 int filter_clear_truncated_page(struct inode *inode)
518 /* Truncate on page boundary, so nothing to flush? */
519 if (!(i_size_read(inode) & ~CFS_PAGE_MASK))
522 rc = filter_sync_inode_data(inode, 1);
526 /* be careful to call this after fsync_inode_data_buffers has waited
527 * for IO to complete before we evict it from the cache */
528 page = find_lock_page(inode->i_mapping,
529 i_size_read(inode) >> CFS_PAGE_SHIFT);
531 if (page->mapping != NULL) {
532 wait_on_page_writeback(page);
533 ll_truncate_complete_page(page);
536 page_cache_release(page);
542 /* Must be called with i_mutex taken for writes; this will drop it */
543 int filter_direct_io(int rw, struct dentry *dchild, struct filter_iobuf *iobuf,
544 struct obd_export *exp, struct iattr *attr,
545 struct obd_trans_info *oti, void **wait_handle)
547 struct obd_device *obd = exp->exp_obd;
548 struct inode *inode = dchild->d_inode;
549 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
551 struct semaphore *sem;
554 LASSERTF(iobuf->dr_npages <= iobuf->dr_max_pages, "%d,%d\n",
555 iobuf->dr_npages, iobuf->dr_max_pages);
556 LASSERT(iobuf->dr_npages <= OBDFILTER_CREATED_SCRATCHPAD_ENTRIES);
558 if (rw == OBD_BRW_READ) {
559 if (iobuf->dr_npages == 0)
564 LASSERTF(rw == OBD_BRW_WRITE, "%x\n", rw);
565 LASSERT(iobuf->dr_npages > 0);
567 sem = &obd->u.filter.fo_alloc_lock;
569 lquota_enforce(filter_quota_interface_ref, obd, iobuf->dr_ignore_quota);
572 rc = fsfilt_map_inode_pages(obd, inode, iobuf->dr_pages,
573 iobuf->dr_npages, iobuf->dr_blocks,
574 obdfilter_created_scratchpad, create, sem);
576 if (rw == OBD_BRW_WRITE) {
578 filter_tally(exp, iobuf->dr_pages,
579 iobuf->dr_npages, iobuf->dr_blocks,
581 if (attr->ia_size > i_size_read(inode))
582 attr->ia_valid |= ATTR_SIZE;
583 rc = fsfilt_setattr(obd, dchild,
584 oti->oti_handle, attr, 0);
587 UNLOCK_INODE_MUTEX(inode);
589 rc2 = filter_finish_transno(exp, oti, 0, 0);
591 CERROR("can't close transaction: %d\n", rc2);
596 rc2 = fsfilt_commit_async(obd,inode,oti->oti_handle,
602 } else if (rc == 0) {
603 filter_tally(exp, iobuf->dr_pages, iobuf->dr_npages,
604 iobuf->dr_blocks, blocks_per_page, 0);
607 rc = filter_clear_page_cache(inode, iobuf);
611 RETURN(filter_do_bio(exp, inode, iobuf, rw));
614 /* See if there are unallocated parts in given file region */
615 static int filter_range_is_mapped(struct inode *inode, obd_size offset, int len)
617 sector_t (*fs_bmap)(struct address_space *, sector_t) =
618 inode->i_mapping->a_ops->bmap;
621 /* We can't know if we are overwriting or not */
625 offset >>= inode->i_blkbits;
626 len >>= inode->i_blkbits;
628 for (j = 0; j <= len; j++)
629 if (fs_bmap(inode->i_mapping, offset + j) == 0)
635 int filter_commitrw_write(struct obd_export *exp, struct obdo *oa,
636 int objcount, struct obd_ioobj *obj, int niocount,
637 struct niobuf_local *res, struct obd_trans_info *oti,
640 struct niobuf_local *lnb;
641 struct filter_iobuf *iobuf = NULL;
642 struct lvfs_run_ctxt saved;
643 struct fsfilt_objinfo fso;
644 struct iattr iattr = { 0 };
645 struct inode *inode = NULL;
646 unsigned long now = jiffies;
647 int i, err, cleanup_phase = 0;
648 struct obd_device *obd = exp->exp_obd;
650 int total_size = 0, rc2;
651 unsigned int qcids[MAXQUOTAS] = {0, 0};
654 LASSERT(oti != NULL);
655 LASSERT(objcount == 1);
656 LASSERT(current->journal_info == NULL);
661 /* Unfortunately, if quota master is too busy to handle the
662 * pre-dqacq in time and quota hash on ost is used up, we
663 * have to wait for the completion of in flight dqacq/dqrel,
665 if ((rc2 = lquota_chkquota(filter_quota_interface_ref, obd, oa->o_uid,
666 oa->o_gid, niocount)) == QUOTA_RET_ACQUOTA) {
667 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_HOLD_WRITE_RPC, 90);
668 lquota_acquire(filter_quota_interface_ref, obd, oa->o_uid,
677 iobuf = filter_iobuf_get(&obd->u.filter, oti);
679 GOTO(cleanup, rc = PTR_ERR(iobuf));
682 fso.fso_dentry = res->dentry;
683 fso.fso_bufcnt = obj->ioo_bufcnt;
684 inode = res->dentry->d_inode;
686 iobuf->dr_ignore_quota = 0;
687 for (i = 0, lnb = res; i < obj->ioo_bufcnt; i++, lnb++) {
690 /* If overwriting an existing block, we don't need a grant */
691 if (!(lnb->flags & OBD_BRW_GRANTED) && lnb->rc == -ENOSPC &&
692 filter_range_is_mapped(inode, lnb->offset, lnb->len))
695 if (lnb->rc) { /* ENOSPC, network RPC error, etc. */
696 CDEBUG(D_INODE, "Skipping [%d] == %d\n", i, lnb->rc);
700 err = filter_iobuf_add_page(obd, iobuf, inode, lnb->page);
703 total_size += lnb->len;
705 /* we expect these pages to be in offset order, but we'll
707 this_size = lnb->offset + lnb->len;
708 if (this_size > iattr.ia_size)
709 iattr.ia_size = this_size;
711 /* if one page is a write-back page from client cache, or it's
712 * written by root, then mark the whole io request as ignore
714 if (lnb->flags & (OBD_BRW_FROM_GRANT | OBD_BRW_NOQUOTA))
715 iobuf->dr_ignore_quota = 1;
718 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
723 LOCK_INODE_MUTEX(inode);
724 fsfilt_check_slow(obd, now, "i_mutex");
725 oti->oti_handle = fsfilt_brw_start(obd, objcount, &fso, niocount, res,
727 if (IS_ERR(oti->oti_handle)) {
728 UNLOCK_INODE_MUTEX(inode);
729 rc = PTR_ERR(oti->oti_handle);
730 CDEBUG(rc == -ENOSPC ? D_INODE : D_ERROR,
731 "error starting transaction: rc = %d\n", rc);
732 oti->oti_handle = NULL;
735 /* have to call fsfilt_commit() from this point on */
737 fsfilt_check_slow(obd, now, "brw_start");
739 i = OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME;
741 /* If the inode still has SUID+SGID bits set (see filter_precreate())
742 * then we will accept the UID+GID if sent by the client for
743 * initializing the ownership of this inode. We only allow this to
744 * happen once (so clear these bits) and later only allow setattr. */
745 if (inode->i_mode & S_ISUID)
747 if (inode->i_mode & S_ISGID)
750 iattr_from_obdo(&iattr, oa, i);
751 if (iattr.ia_valid & (ATTR_UID | ATTR_GID)) {
754 CDEBUG(D_INODE, "update UID/GID to %lu/%lu\n",
755 (unsigned long)oa->o_uid, (unsigned long)oa->o_gid);
757 cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
759 iattr.ia_valid |= ATTR_MODE;
760 iattr.ia_mode = inode->i_mode;
761 if (iattr.ia_valid & ATTR_UID)
762 iattr.ia_mode &= ~S_ISUID;
763 if (iattr.ia_valid & ATTR_GID)
764 iattr.ia_mode &= ~S_ISGID;
766 rc = filter_update_fidea(exp, inode, oti->oti_handle, oa);
768 /* To avoid problems with quotas, UID and GID must be set
769 * in the inode before filter_direct_io() - see bug 10357. */
770 save = iattr.ia_valid;
771 iattr.ia_valid &= (ATTR_UID | ATTR_GID);
772 rc = fsfilt_setattr(obd, res->dentry, oti->oti_handle, &iattr, 0);
773 CDEBUG(D_QUOTA, "set uid(%u)/gid(%u) to ino(%lu). rc(%d)\n",
774 iattr.ia_uid, iattr.ia_gid, inode->i_ino, rc);
775 iattr.ia_valid = save & ~(ATTR_UID | ATTR_GID);
778 /* filter_direct_io drops i_mutex */
779 rc = filter_direct_io(OBD_BRW_WRITE, res->dentry, iobuf, exp, &iattr,
782 obdo_from_inode(oa, inode,
783 FILTER_VALID_FLAGS |OBD_MD_FLUID |OBD_MD_FLGID);
785 obdo_from_inode(oa, inode, OBD_MD_FLUID | OBD_MD_FLGID);
787 lquota_getflag(filter_quota_interface_ref, obd, oa);
789 fsfilt_check_slow(obd, now, "direct_io");
791 err = fsfilt_commit_wait(obd, inode, wait_handle);
793 CERROR("Failure to commit OST transaction (%d)?\n", err);
797 if (obd->obd_replayable && !rc)
798 LASSERTF(oti->oti_transno <= obd->obd_last_committed,
799 "oti_transno "LPU64" last_committed "LPU64"\n",
800 oti->oti_transno, obd->obd_last_committed);
802 fsfilt_check_slow(obd, now, "commitrw commit");
805 filter_grant_commit(exp, niocount, res);
807 switch (cleanup_phase) {
809 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
810 LASSERT(current->journal_info == NULL);
812 filter_iobuf_put(&obd->u.filter, iobuf, oti);
815 * lnb->page automatically returns back into per-thread page
821 /* trigger quota pre-acquire */
822 qcids[USRQUOTA] = oa->o_uid;
823 qcids[GRPQUOTA] = oa->o_gid;
824 err = lquota_adjust(filter_quota_interface_ref, obd, qcids, NULL, rc,
826 CDEBUG(err ? D_ERROR : D_QUOTA,
827 "filter adjust qunit! (rc:%d)\n", err);