1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * linux/fs/obdfilter/filter_io.c
6 * Copyright (c) 2001-2003 Cluster File Systems, Inc.
7 * Author: Peter Braam <braam@clusterfs.com>
8 * Author: Andreas Dilger <adilger@clusterfs.com>
9 * Author: Phil Schwan <phil@clusterfs.com>
11 * This file is part of the Lustre file system, http://www.lustre.org
12 * Lustre is a trademark of Cluster File Systems, Inc.
14 * You may have signed or agreed to another license before downloading
15 * this software. If so, you are bound by the terms and conditions
16 * of that agreement, and the following does not apply to you. See the
17 * LICENSE file included with this distribution for more information.
19 * If you did not agree to a different license, then this copy of Lustre
20 * is open source software; you can redistribute it and/or modify it
21 * under the terms of version 2 of the GNU General Public License as
22 * published by the Free Software Foundation.
24 * In either case, Lustre is distributed in the hope that it will be
25 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
26 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * license text for more details.
30 #ifndef AUTOCONF_INCLUDED
31 #include <linux/config.h>
33 #include <linux/module.h>
34 #include <linux/pagemap.h> // XXX kill me soon
35 #include <linux/version.h>
36 #include <linux/buffer_head.h>
38 #define DEBUG_SUBSYSTEM S_FILTER
40 #include <obd_class.h>
41 #include <lustre_fsfilt.h>
42 #include <lustre_quota.h>
43 #include "filter_internal.h"
45 /* 512byte block min */
46 #define MAX_BLOCKS_PER_PAGE (CFS_PAGE_SIZE / 512)
48 atomic_t dr_numreqs; /* number of reqs being processed */
49 wait_queue_head_t dr_wait;
53 struct page **dr_pages;
54 unsigned long *dr_blocks;
55 spinlock_t dr_lock; /* IRQ lock */
56 unsigned int dr_ignore_quota:1;
57 struct filter_obd *dr_filter;
60 static void record_start_io(struct filter_iobuf *iobuf, int rw, int size,
61 struct obd_export *exp)
63 struct filter_obd *filter = iobuf->dr_filter;
65 atomic_inc(&iobuf->dr_numreqs);
67 if (rw == OBD_BRW_READ) {
68 atomic_inc(&filter->fo_r_in_flight);
69 lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_R_RPC_HIST],
70 atomic_read(&filter->fo_r_in_flight));
71 lprocfs_oh_tally_log2(&filter->fo_filter_stats.hist[BRW_R_DISK_IOSIZE],
73 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_RPC_HIST],
74 atomic_read(&filter->fo_r_in_flight));
75 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_DISK_IOSIZE], size);
77 atomic_inc(&filter->fo_w_in_flight);
78 lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_W_RPC_HIST],
79 atomic_read(&filter->fo_w_in_flight));
80 lprocfs_oh_tally_log2(&filter->fo_filter_stats.hist[BRW_W_DISK_IOSIZE],
82 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_RPC_HIST],
83 atomic_read(&filter->fo_w_in_flight));
84 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_DISK_IOSIZE], size);
88 static void record_finish_io(struct filter_iobuf *iobuf, int rw, int rc)
90 struct filter_obd *filter = iobuf->dr_filter;
92 /* CAVEAT EMPTOR: possibly in IRQ context
93 * DO NOT record procfs stats here!!! */
95 if (rw == OBD_BRW_READ)
96 atomic_dec(&filter->fo_r_in_flight);
98 atomic_dec(&filter->fo_w_in_flight);
100 if (atomic_dec_and_test(&iobuf->dr_numreqs))
101 wake_up(&iobuf->dr_wait);
104 static int dio_complete_routine(struct bio *bio, unsigned int done, int error)
106 struct filter_iobuf *iobuf = bio->bi_private;
109 #ifdef HAVE_PAGE_CONSTANT
114 /* CAVEAT EMPTOR: possibly in IRQ context
115 * DO NOT record procfs stats here!!! */
117 if (bio->bi_size) /* Not complete */
121 CERROR("***** bio->bi_private is NULL! This should never "
122 "happen. Normally, I would crash here, but instead I "
123 "will dump the bio contents to the console. Please "
124 "report this to CFS, along with any interesting "
125 "messages leading up to this point (like SCSI errors, "
126 "perhaps). Because bi_private is NULL, I can't wake up "
127 "the thread that initiated this I/O -- so you will "
128 "probably have to reboot this node.\n");
129 CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, "
130 "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, "
131 "bi_private: %p\n", bio->bi_next, bio->bi_flags,
132 bio->bi_rw, bio->bi_vcnt, bio->bi_idx, bio->bi_size,
133 bio->bi_end_io, atomic_read(&bio->bi_cnt),
138 #ifdef HAVE_PAGE_CONSTANT
139 bio_for_each_segment(bvl, bio, i)
140 ClearPageConstant(bvl->bv_page);
143 spin_lock_irqsave(&iobuf->dr_lock, flags);
144 if (iobuf->dr_error == 0)
145 iobuf->dr_error = error;
146 spin_unlock_irqrestore(&iobuf->dr_lock, flags);
148 record_finish_io(iobuf, test_bit(BIO_RW, &bio->bi_rw) ?
149 OBD_BRW_WRITE : OBD_BRW_READ, error);
151 /* Completed bios used to be chained off iobuf->dr_bios and freed in
152 * filter_clear_dreq(). It was then possible to exhaust the biovec-256
153 * mempool when serious on-disk fragmentation was encountered,
154 * deadlocking the OST. The bios are now released as soon as complete
155 * so the pool cannot be exhausted while IOs are competing. bug 10076 */
160 static int can_be_merged(struct bio *bio, sector_t sector)
167 size = bio->bi_size >> 9;
168 return bio->bi_sector + size == sector ? 1 : 0;
171 struct filter_iobuf *filter_alloc_iobuf(struct filter_obd *filter,
172 int rw, int num_pages)
174 struct filter_iobuf *iobuf;
176 LASSERTF(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ, "%x\n", rw);
178 OBD_ALLOC(iobuf, sizeof(*iobuf));
182 OBD_ALLOC(iobuf->dr_pages, num_pages * sizeof(*iobuf->dr_pages));
183 if (iobuf->dr_pages == NULL)
186 OBD_ALLOC(iobuf->dr_blocks,
187 MAX_BLOCKS_PER_PAGE * num_pages * sizeof(*iobuf->dr_blocks));
188 if (iobuf->dr_blocks == NULL)
191 iobuf->dr_filter = filter;
192 init_waitqueue_head(&iobuf->dr_wait);
193 atomic_set(&iobuf->dr_numreqs, 0);
194 spin_lock_init(&iobuf->dr_lock);
195 iobuf->dr_max_pages = num_pages;
196 iobuf->dr_npages = 0;
202 OBD_FREE(iobuf->dr_pages,
203 num_pages * sizeof(*iobuf->dr_pages));
205 OBD_FREE(iobuf, sizeof(*iobuf));
207 RETURN(ERR_PTR(-ENOMEM));
210 static void filter_clear_iobuf(struct filter_iobuf *iobuf)
212 iobuf->dr_npages = 0;
214 atomic_set(&iobuf->dr_numreqs, 0);
217 void filter_free_iobuf(struct filter_iobuf *iobuf)
219 int num_pages = iobuf->dr_max_pages;
221 filter_clear_iobuf(iobuf);
223 OBD_FREE(iobuf->dr_blocks,
224 MAX_BLOCKS_PER_PAGE * num_pages * sizeof(*iobuf->dr_blocks));
225 OBD_FREE(iobuf->dr_pages,
226 num_pages * sizeof(*iobuf->dr_pages));
230 void filter_iobuf_put(struct filter_obd *filter, struct filter_iobuf *iobuf,
231 struct obd_trans_info *oti)
233 int thread_id = oti ? oti->oti_thread_id : -1;
235 if (unlikely(thread_id < 0)) {
236 filter_free_iobuf(iobuf);
240 LASSERTF(filter->fo_iobuf_pool[thread_id] == iobuf,
241 "iobuf mismatch for thread %d: pool %p iobuf %p\n",
242 thread_id, filter->fo_iobuf_pool[thread_id], iobuf);
243 filter_clear_iobuf(iobuf);
246 int filter_iobuf_add_page(struct obd_device *obd, struct filter_iobuf *iobuf,
247 struct inode *inode, struct page *page)
249 LASSERT(iobuf->dr_npages < iobuf->dr_max_pages);
250 iobuf->dr_pages[iobuf->dr_npages++] = page;
255 int filter_do_bio(struct obd_export *exp, struct inode *inode,
256 struct filter_iobuf *iobuf, int rw)
258 struct obd_device *obd = exp->exp_obd;
259 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
260 struct page **pages = iobuf->dr_pages;
261 int npages = iobuf->dr_npages;
262 unsigned long *blocks = iobuf->dr_blocks;
263 int total_blocks = npages * blocks_per_page;
264 int sector_bits = inode->i_sb->s_blocksize_bits - 9;
265 unsigned int blocksize = inode->i_sb->s_blocksize;
266 struct bio *bio = NULL;
268 unsigned long start_time = jiffies;
270 unsigned int page_offset;
279 LASSERT(iobuf->dr_npages == npages);
280 LASSERT(total_blocks <= OBDFILTER_CREATED_SCRATCHPAD_ENTRIES);
282 for (page_idx = 0, block_idx = 0;
284 page_idx++, block_idx += blocks_per_page) {
286 page = pages[page_idx];
287 LASSERT (block_idx + blocks_per_page <= total_blocks);
289 for (i = 0, page_offset = 0;
291 i += nblocks, page_offset += blocksize * nblocks) {
295 if (blocks[block_idx + i] == 0) { /* hole */
296 LASSERT(rw == OBD_BRW_READ);
297 memset(kmap(page) + page_offset, 0, blocksize);
302 sector = (sector_t)blocks[block_idx + i] << sector_bits;
304 /* Additional contiguous file blocks? */
305 while (i + nblocks < blocks_per_page &&
306 (sector + (nblocks << sector_bits)) ==
307 ((sector_t)blocks[block_idx + i + nblocks] <<
311 #ifdef HAVE_PAGE_CONSTANT
312 /* I only set the page to be constant only if it
313 * is mapped to a contiguous underlying disk block(s).
314 * It will then make sure the corresponding device
315 * cache of raid5 will be overwritten by this page.
317 if ((rw == OBD_BRW_WRITE) &&
318 (nblocks == blocks_per_page) &&
319 mapping_cap_page_constant_write(inode->i_mapping))
320 SetPageConstant(page);
324 can_be_merged(bio, sector) &&
325 bio_add_page(bio, page,
326 blocksize * nblocks, page_offset) != 0)
327 continue; /* added this frag OK */
331 bdev_get_queue(bio->bi_bdev);
333 /* Dang! I have to fragment this I/O */
334 CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) "
335 "sectors %d(%d) psg %d(%d) hsg %d(%d)\n",
337 bio->bi_vcnt, bio->bi_max_vecs,
338 bio->bi_size >> 9, q->max_sectors,
339 bio_phys_segments(q, bio),
340 q->max_phys_segments,
341 bio_hw_segments(q, bio),
344 record_start_io(iobuf, rw, bio->bi_size, exp);
345 rc = fsfilt_send_bio(rw, obd, inode, bio);
347 CERROR("Can't send bio: %d\n", rc);
348 record_finish_io(iobuf, rw, rc);
354 /* allocate new bio */
355 bio = bio_alloc(GFP_NOIO,
356 (npages - page_idx) * blocks_per_page);
358 CERROR("Can't allocate bio %u*%u = %u pages\n",
359 (npages - page_idx), blocks_per_page,
360 (npages - page_idx) * blocks_per_page);
365 bio->bi_bdev = inode->i_sb->s_bdev;
366 bio->bi_sector = sector;
367 bio->bi_end_io = dio_complete_routine;
368 bio->bi_private = iobuf;
370 rc = bio_add_page(bio, page,
371 blocksize * nblocks, page_offset);
377 record_start_io(iobuf, rw, bio->bi_size, exp);
378 rc = fsfilt_send_bio(rw, obd, inode, bio);
383 CERROR("Can't send bio: %d\n", rc);
384 record_finish_io(iobuf, rw, rc);
389 wait_event(iobuf->dr_wait, atomic_read(&iobuf->dr_numreqs) == 0);
391 if (rw == OBD_BRW_READ) {
392 lprocfs_oh_tally(&obd->u.filter.fo_filter_stats.hist[BRW_R_DIO_FRAGS],
394 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_DIO_FRAGS],
396 lprocfs_oh_tally_log2(&obd->u.filter.fo_filter_stats.hist[BRW_R_IO_TIME],
397 jiffies - start_time);
398 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_IO_TIME], jiffies - start_time);
399 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) {
400 lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_R_DIO_FRAGS],
402 lprocfs_oh_tally_log2(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_R_IO_TIME],
403 jiffies - start_time);
406 lprocfs_oh_tally(&obd->u.filter.fo_filter_stats.hist[BRW_W_DIO_FRAGS],
408 lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_DIO_FRAGS],
410 lprocfs_oh_tally_log2(&obd->u.filter.fo_filter_stats.hist[BRW_W_IO_TIME],
411 jiffies - start_time);
412 lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_IO_TIME], jiffies - start_time);
413 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) {
414 lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_W_DIO_FRAGS],
416 lprocfs_oh_tally_log2(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_W_IO_TIME],
417 jiffies - start_time);
422 rc = iobuf->dr_error;
426 /* These are our hacks to keep our directio/bh IO coherent with ext3's
427 * page cache use. Most notably ext3 reads file data into the page
428 * cache when it is zeroing the tail of partial-block truncates and
429 * leaves it there, sometimes generating io from it at later truncates.
430 * This removes the partial page and its buffers from the page cache,
431 * so it should only ever cause a wait in rare cases, as otherwise we
432 * always do full-page IO to the OST.
434 * The call to truncate_complete_page() will call journal_invalidatepage()
435 * to free the buffers and drop the page from cache. The buffers should
436 * not be dirty, because we already called fdatasync/fdatawait on them.
438 static int filter_sync_inode_data(struct inode *inode, int locked)
442 /* This is nearly do_fsync(), without the waiting on the inode */
443 /* XXX: in 2.6.16 (at least) we don't need to hold i_mutex over
444 * filemap_fdatawrite() and filemap_fdatawait(), so we may no longer
445 * need this lock here at all. */
447 LOCK_INODE_MUTEX(inode);
448 if (inode->i_mapping->nrpages) {
450 current->flags |= PF_SYNCWRITE;
452 rc = filemap_fdatawrite(inode->i_mapping);
454 rc = filemap_fdatawait(inode->i_mapping);
456 current->flags &= ~PF_SYNCWRITE;
460 UNLOCK_INODE_MUTEX(inode);
464 /* Clear pages from the mapping before we do direct IO to that offset.
465 * Now that the only source of such pages in the truncate path flushes
466 * these pages to disk and then discards them, this is error condition.
467 * If add back read cache this will happen again. This could be disabled
468 * until that time if we never see the below error. */
469 static int filter_clear_page_cache(struct inode *inode,
470 struct filter_iobuf *iobuf)
475 rc = filter_sync_inode_data(inode, 0);
479 /* be careful to call this after fsync_inode_data_buffers has waited
480 * for IO to complete before we evict it from the cache */
481 for (i = 0; i < iobuf->dr_npages; i++) {
482 page = find_lock_page(inode->i_mapping,
483 iobuf->dr_pages[i]->index);
486 if (page->mapping != NULL) {
487 CERROR("page %lu (%d/%d) in page cache during write!\n",
488 page->index, i, iobuf->dr_npages);
489 wait_on_page_writeback(page);
490 ll_truncate_complete_page(page);
494 page_cache_release(page);
500 int filter_clear_truncated_page(struct inode *inode)
505 /* Truncate on page boundary, so nothing to flush? */
506 if (!(i_size_read(inode) & ~CFS_PAGE_MASK))
509 rc = filter_sync_inode_data(inode, 1);
513 /* be careful to call this after fsync_inode_data_buffers has waited
514 * for IO to complete before we evict it from the cache */
515 page = find_lock_page(inode->i_mapping,
516 i_size_read(inode) >> CFS_PAGE_SHIFT);
518 if (page->mapping != NULL) {
519 wait_on_page_writeback(page);
520 ll_truncate_complete_page(page);
523 page_cache_release(page);
529 /* Must be called with i_mutex taken for writes; this will drop it */
530 int filter_direct_io(int rw, struct dentry *dchild, struct filter_iobuf *iobuf,
531 struct obd_export *exp, struct iattr *attr,
532 struct obd_trans_info *oti, void **wait_handle)
534 struct obd_device *obd = exp->exp_obd;
535 struct inode *inode = dchild->d_inode;
536 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
538 struct semaphore *sem;
541 LASSERTF(iobuf->dr_npages <= iobuf->dr_max_pages, "%d,%d\n",
542 iobuf->dr_npages, iobuf->dr_max_pages);
543 LASSERT(iobuf->dr_npages <= OBDFILTER_CREATED_SCRATCHPAD_ENTRIES);
545 if (rw == OBD_BRW_READ) {
546 if (iobuf->dr_npages == 0)
551 LASSERTF(rw == OBD_BRW_WRITE, "%x\n", rw);
552 LASSERT(iobuf->dr_npages > 0);
554 sem = &obd->u.filter.fo_alloc_lock;
556 lquota_enforce(filter_quota_interface_ref, obd, iobuf->dr_ignore_quota);
559 rc = fsfilt_map_inode_pages(obd, inode, iobuf->dr_pages,
560 iobuf->dr_npages, iobuf->dr_blocks,
561 obdfilter_created_scratchpad, create, sem);
563 if (rw == OBD_BRW_WRITE) {
565 filter_tally(exp, iobuf->dr_pages,
566 iobuf->dr_npages, iobuf->dr_blocks,
568 if (attr->ia_size > i_size_read(inode))
569 attr->ia_valid |= ATTR_SIZE;
570 rc = fsfilt_setattr(obd, dchild,
571 oti->oti_handle, attr, 0);
574 UNLOCK_INODE_MUTEX(inode);
576 rc2 = filter_finish_transno(exp, oti, 0, 0);
578 CERROR("can't close transaction: %d\n", rc2);
583 rc2 = fsfilt_commit_async(obd,inode,oti->oti_handle,
589 } else if (rc == 0) {
590 filter_tally(exp, iobuf->dr_pages, iobuf->dr_npages,
591 iobuf->dr_blocks, blocks_per_page, 0);
594 rc = filter_clear_page_cache(inode, iobuf);
598 RETURN(filter_do_bio(exp, inode, iobuf, rw));
601 /* See if there are unallocated parts in given file region */
602 static int filter_range_is_mapped(struct inode *inode, obd_size offset, int len)
604 sector_t (*fs_bmap)(struct address_space *, sector_t) =
605 inode->i_mapping->a_ops->bmap;
608 /* We can't know if we are overwriting or not */
612 offset >>= inode->i_blkbits;
613 len >>= inode->i_blkbits;
615 for (j = 0; j <= len; j++)
616 if (fs_bmap(inode->i_mapping, offset + j) == 0)
622 int filter_commitrw_write(struct obd_export *exp, struct obdo *oa,
623 int objcount, struct obd_ioobj *obj, int niocount,
624 struct niobuf_local *res, struct obd_trans_info *oti,
627 struct niobuf_local *lnb;
628 struct filter_iobuf *iobuf = NULL;
629 struct lvfs_run_ctxt saved;
630 struct fsfilt_objinfo fso;
631 struct iattr iattr = { 0 };
632 struct inode *inode = NULL;
633 unsigned long now = jiffies;
634 int i, err, cleanup_phase = 0;
635 struct obd_device *obd = exp->exp_obd;
637 int total_size = 0, rc2;
638 unsigned int qcids[MAXQUOTAS] = {0, 0};
641 LASSERT(oti != NULL);
642 LASSERT(objcount == 1);
643 LASSERT(current->journal_info == NULL);
648 /* Unfortunately, if quota master is too busy to handle the
649 * pre-dqacq in time and quota hash on ost is used up, we
650 * have to wait for the completion of in flight dqacq/dqrel,
652 if ((rc2 = lquota_chkquota(filter_quota_interface_ref, obd, oa->o_uid,
653 oa->o_gid, niocount)) == QUOTA_RET_ACQUOTA) {
654 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_HOLD_WRITE_RPC, 90);
655 lquota_acquire(filter_quota_interface_ref, obd, oa->o_uid,
664 iobuf = filter_iobuf_get(&obd->u.filter, oti);
666 GOTO(cleanup, rc = PTR_ERR(iobuf));
669 fso.fso_dentry = res->dentry;
670 fso.fso_bufcnt = obj->ioo_bufcnt;
671 inode = res->dentry->d_inode;
673 iobuf->dr_ignore_quota = 0;
674 for (i = 0, lnb = res; i < obj->ioo_bufcnt; i++, lnb++) {
677 /* If overwriting an existing block, we don't need a grant */
678 if (!(lnb->flags & OBD_BRW_GRANTED) && lnb->rc == -ENOSPC &&
679 filter_range_is_mapped(inode, lnb->offset, lnb->len))
682 if (lnb->rc) { /* ENOSPC, network RPC error, etc. */
683 CDEBUG(D_INODE, "Skipping [%d] == %d\n", i, lnb->rc);
687 err = filter_iobuf_add_page(obd, iobuf, inode, lnb->page);
690 total_size += lnb->len;
692 /* we expect these pages to be in offset order, but we'll
694 this_size = lnb->offset + lnb->len;
695 if (this_size > iattr.ia_size)
696 iattr.ia_size = this_size;
698 /* if one page is a write-back page from client cache, or it's
699 * written by root, then mark the whole io request as ignore
701 if (lnb->flags & (OBD_BRW_FROM_GRANT | OBD_BRW_NOQUOTA))
702 iobuf->dr_ignore_quota = 1;
705 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
710 LOCK_INODE_MUTEX(inode);
711 fsfilt_check_slow(obd, now, obd_timeout, "i_mutex");
712 oti->oti_handle = fsfilt_brw_start(obd, objcount, &fso, niocount, res,
714 if (IS_ERR(oti->oti_handle)) {
715 UNLOCK_INODE_MUTEX(inode);
716 rc = PTR_ERR(oti->oti_handle);
717 CDEBUG(rc == -ENOSPC ? D_INODE : D_ERROR,
718 "error starting transaction: rc = %d\n", rc);
719 oti->oti_handle = NULL;
722 /* have to call fsfilt_commit() from this point on */
724 fsfilt_check_slow(obd, now, obd_timeout, "brw_start");
726 i = OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME;
728 /* If the inode still has SUID+SGID bits set (see filter_precreate())
729 * then we will accept the UID+GID if sent by the client for
730 * initializing the ownership of this inode. We only allow this to
731 * happen once (so clear these bits) and later only allow setattr. */
732 if (inode->i_mode & S_ISUID)
734 if (inode->i_mode & S_ISGID)
737 iattr_from_obdo(&iattr, oa, i);
738 if (iattr.ia_valid & (ATTR_UID | ATTR_GID)) {
741 CDEBUG(D_INODE, "update UID/GID to %lu/%lu\n",
742 (unsigned long)oa->o_uid, (unsigned long)oa->o_gid);
744 cap_raise(current->cap_effective, CAP_SYS_RESOURCE);
746 iattr.ia_valid |= ATTR_MODE;
747 iattr.ia_mode = inode->i_mode;
748 if (iattr.ia_valid & ATTR_UID)
749 iattr.ia_mode &= ~S_ISUID;
750 if (iattr.ia_valid & ATTR_GID)
751 iattr.ia_mode &= ~S_ISGID;
753 rc = filter_update_fidea(exp, inode, oti->oti_handle, oa);
755 /* To avoid problems with quotas, UID and GID must be set
756 * in the inode before filter_direct_io() - see bug 10357. */
757 save = iattr.ia_valid;
758 iattr.ia_valid &= (ATTR_UID | ATTR_GID);
759 rc = fsfilt_setattr(obd, res->dentry, oti->oti_handle, &iattr, 0);
760 CDEBUG(D_QUOTA, "set uid(%u)/gid(%u) to ino(%lu). rc(%d)\n",
761 iattr.ia_uid, iattr.ia_gid, inode->i_ino, rc);
762 iattr.ia_valid = save & ~(ATTR_UID | ATTR_GID);
765 /* filter_direct_io drops i_mutex */
766 rc = filter_direct_io(OBD_BRW_WRITE, res->dentry, iobuf, exp, &iattr,
769 obdo_from_inode(oa, inode,
770 FILTER_VALID_FLAGS |OBD_MD_FLUID |OBD_MD_FLGID);
772 obdo_from_inode(oa, inode, OBD_MD_FLUID | OBD_MD_FLGID);
774 lquota_getflag(filter_quota_interface_ref, obd, oa);
776 fsfilt_check_slow(obd, now, obd_timeout, "direct_io");
778 err = fsfilt_commit_wait(obd, inode, wait_handle);
780 CERROR("Failure to commit OST transaction (%d)?\n", err);
784 if (obd->obd_replayable && !rc)
785 LASSERTF(oti->oti_transno <= obd->obd_last_committed,
786 "oti_transno "LPU64" last_committed "LPU64"\n",
787 oti->oti_transno, obd->obd_last_committed);
789 fsfilt_check_slow(obd, now, obd_timeout, "commitrw commit");
792 filter_grant_commit(exp, niocount, res);
794 switch (cleanup_phase) {
796 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
797 LASSERT(current->journal_info == NULL);
799 filter_iobuf_put(&obd->u.filter, iobuf, oti);
802 * lnb->page automatically returns back into per-thread page
808 /* trigger quota pre-acquire */
809 qcids[USRQUOTA] = oa->o_uid;
810 qcids[GRPQUOTA] = oa->o_gid;
811 err = lquota_adjust(filter_quota_interface_ref, obd, qcids, NULL, rc,
813 CDEBUG(err ? D_ERROR : D_QUOTA,
814 "filter adjust qunit! (rc:%d)\n", err);