X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fobdfilter%2Ffilter_io_26.c;h=cafb080abd6e98a1db502e76e4dd46eae2cf19ae;hb=51206e8cd42134400fa0b6259a92d7138f3dc984;hp=c9d2151270bf29037ca5d7927cca2af3099479fb;hpb=cd9c585e8c7bdd6cfd802be64ef277dfd466be17;p=fs%2Flustre-release.git diff --git a/lustre/obdfilter/filter_io_26.c b/lustre/obdfilter/filter_io_26.c index c9d2151..cafb080 100644 --- a/lustre/obdfilter/filter_io_26.c +++ b/lustre/obdfilter/filter_io_26.c @@ -1,71 +1,212 @@ /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * - * linux/fs/obdfilter/filter_io.c + * GPL HEADER START * - * Copyright (c) 2001-2003 Cluster File Systems, Inc. - * Author: Peter Braam - * Author: Andreas Dilger - * Author: Phil Schwan + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * This file is part of Lustre, http://www.lustre.org. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). * - * Lustre is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Whamcloud, Inc. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/obdfilter/filter_io_26.c + * + * Author: Peter Braam + * Author: Andreas Dilger + * Author: Phil Schwan */ +#ifndef AUTOCONF_INCLUDED #include +#endif #include #include // XXX kill me soon #include +#include #define DEBUG_SUBSYSTEM S_FILTER -#include -#include +#include +#include +#include #include "filter_internal.h" -#warning "implement writeback mode -bzzz" - /* 512byte block min */ -#define MAX_BLOCKS_PER_PAGE (PAGE_SIZE / 512) -struct dio_request { - atomic_t numreqs; /* number of reqs being processed */ - struct bio *bio_list; /* list of completed bios */ - wait_queue_head_t wait; - int created[MAX_BLOCKS_PER_PAGE]; - unsigned long blocks[MAX_BLOCKS_PER_PAGE]; - spinlock_t lock; +#define MAX_BLOCKS_PER_PAGE (CFS_PAGE_SIZE / 512) +struct filter_iobuf { + cfs_atomic_t dr_numreqs; /* number of reqs being processed */ + cfs_waitq_t dr_wait; + int dr_max_pages; + int dr_npages; + int dr_error; + struct page **dr_pages; + unsigned long *dr_blocks; + unsigned int dr_ignore_quota:1; + struct filter_obd *dr_filter; }; +static void record_start_io(struct filter_iobuf *iobuf, int rw, int size, + struct obd_export *exp) +{ + struct filter_obd *filter = iobuf->dr_filter; + + cfs_atomic_inc(&iobuf->dr_numreqs); + + if (rw == OBD_BRW_READ) { + cfs_atomic_inc(&filter->fo_r_in_flight); + lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_R_RPC_HIST], + cfs_atomic_read(&filter->fo_r_in_flight)); + lprocfs_oh_tally_log2(&filter-> + fo_filter_stats.hist[BRW_R_DISK_IOSIZE], + size); + if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) { + lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats-> + hist[BRW_R_RPC_HIST], + cfs_atomic_read(&filter-> \ + fo_r_in_flight)); + lprocfs_oh_tally_log2(&exp->exp_nid_stats-> + nid_brw_stats->hist[BRW_R_DISK_IOSIZE], + size); + } + } else { + cfs_atomic_inc(&filter->fo_w_in_flight); + lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_W_RPC_HIST], + cfs_atomic_read(&filter->fo_w_in_flight)); + lprocfs_oh_tally_log2(&filter-> + fo_filter_stats.hist[BRW_W_DISK_IOSIZE], + size); + if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) { + lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats-> + hist[BRW_W_RPC_HIST], + cfs_atomic_read(&filter-> \ + fo_w_in_flight)); + lprocfs_oh_tally_log2(&exp->exp_nid_stats-> + nid_brw_stats->hist[BRW_W_DISK_IOSIZE], + size); + } + } +} + +static void record_finish_io(struct filter_iobuf *iobuf, int rw, int rc) +{ + struct filter_obd *filter = iobuf->dr_filter; + + /* CAVEAT EMPTOR: possibly in IRQ context + * DO NOT record procfs stats here!!! */ + + if (rw == OBD_BRW_READ) + cfs_atomic_dec(&filter->fo_r_in_flight); + else + cfs_atomic_dec(&filter->fo_w_in_flight); + + if (cfs_atomic_dec_and_test(&iobuf->dr_numreqs)) + cfs_waitq_signal(&iobuf->dr_wait); +} + +#ifdef HAVE_BIO_ENDIO_2ARG +#define DIO_RETURN(a) +static void dio_complete_routine(struct bio *bio, int error) +#else +#define DIO_RETURN(a) return(a) static int dio_complete_routine(struct bio *bio, unsigned int done, int error) +#endif { - struct dio_request *dreq = bio->bi_private; - unsigned long flags; + struct filter_iobuf *iobuf = bio->bi_private; + struct bio_vec *bvl; + int i; + + /* CAVEAT EMPTOR: possibly in IRQ context + * DO NOT record procfs stats here!!! */ + +#ifdef HAVE_BIO_ENDIO_2ARG + /* The "bi_size" check was needed for kernels < 2.6.24 in order to + * handle the case where a SCSI request error caused this callback + * to be called before all of the biovecs had been processed. + * Without this check the server thread will hang. In newer kernels + * the bio_end_io routine is never called for partial completions, + * so this check is no longer needed. */ + if (bio->bi_size) /* Not complete */ + DIO_RETURN(1); +#endif + + if (unlikely(iobuf == NULL)) { + CERROR("***** bio->bi_private is NULL! This should never " + "happen. Normally, I would crash here, but instead I " + "will dump the bio contents to the console. Please " + "report this to , along " + "with any interesting messages leading up to this point " + "(like SCSI errors, perhaps). Because bi_private is " + "NULL, I can't wake up the thread that initiated this " + "IO - you will probably have to reboot this node.\n"); + CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, " + "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, " + "bi_private: %p\n", bio->bi_next, bio->bi_flags, + bio->bi_rw, bio->bi_vcnt, bio->bi_idx, bio->bi_size, + bio->bi_end_io, cfs_atomic_read(&bio->bi_cnt), + bio->bi_private); + DIO_RETURN(0); + } - spin_lock_irqsave(&dreq->lock, flags); - bio->bi_private = dreq->bio_list; - dreq->bio_list = bio; - spin_unlock_irqrestore(&dreq->lock, flags); - if (atomic_dec_and_test(&dreq->numreqs)) - wake_up(&dreq->wait); + /* the check is outside of the cycle for performance reason -bzzz */ + if (!cfs_test_bit(BIO_RW, &bio->bi_rw)) { + bio_for_each_segment(bvl, bio, i) { + if (likely(error == 0)) + SetPageUptodate(bvl->bv_page); + LASSERT(PageLocked(bvl->bv_page)); + ClearPageConstant(bvl->bv_page); + } + record_finish_io(iobuf, OBD_BRW_READ, error); + } else { + if (mapping_cap_page_constant_write(iobuf->dr_pages[0]->mapping)){ + bio_for_each_segment(bvl, bio, i) { + ClearPageConstant(bvl->bv_page); + } + } + record_finish_io(iobuf, OBD_BRW_WRITE, error); + } - return 0; + /* any real error is good enough -bzzz */ + if (error != 0 && iobuf->dr_error == 0) + iobuf->dr_error = error; + + /* Completed bios used to be chained off iobuf->dr_bios and freed in + * filter_clear_dreq(). It was then possible to exhaust the biovec-256 + * mempool when serious on-disk fragmentation was encountered, + * deadlocking the OST. The bios are now released as soon as complete + * so the pool cannot be exhausted while IOs are competing. bug 10076 */ + bio_put(bio); + DIO_RETURN(0); } static int can_be_merged(struct bio *bio, sector_t sector) { - int size; + unsigned int size; if (!bio) return 0; @@ -74,6 +215,349 @@ static int can_be_merged(struct bio *bio, sector_t sector) return bio->bi_sector + size == sector ? 1 : 0; } +struct filter_iobuf *filter_alloc_iobuf(struct filter_obd *filter, + int rw, int num_pages) +{ + struct filter_iobuf *iobuf; + + LASSERTF(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ, "%x\n", rw); + + OBD_ALLOC(iobuf, sizeof(*iobuf)); + if (iobuf == NULL) + goto failed_0; + + OBD_ALLOC(iobuf->dr_pages, num_pages * sizeof(*iobuf->dr_pages)); + if (iobuf->dr_pages == NULL) + goto failed_1; + + OBD_ALLOC(iobuf->dr_blocks, + MAX_BLOCKS_PER_PAGE * num_pages * sizeof(*iobuf->dr_blocks)); + if (iobuf->dr_blocks == NULL) + goto failed_2; + + iobuf->dr_filter = filter; + cfs_waitq_init(&iobuf->dr_wait); + cfs_atomic_set(&iobuf->dr_numreqs, 0); + iobuf->dr_max_pages = num_pages; + iobuf->dr_npages = 0; + iobuf->dr_error = 0; + + RETURN(iobuf); + + failed_2: + OBD_FREE(iobuf->dr_pages, + num_pages * sizeof(*iobuf->dr_pages)); + failed_1: + OBD_FREE(iobuf, sizeof(*iobuf)); + failed_0: + RETURN(ERR_PTR(-ENOMEM)); +} + +static void filter_clear_iobuf(struct filter_iobuf *iobuf) +{ + iobuf->dr_npages = 0; + iobuf->dr_error = 0; + cfs_atomic_set(&iobuf->dr_numreqs, 0); +} + +void filter_free_iobuf(struct filter_iobuf *iobuf) +{ + int num_pages = iobuf->dr_max_pages; + + filter_clear_iobuf(iobuf); + + OBD_FREE(iobuf->dr_blocks, + MAX_BLOCKS_PER_PAGE * num_pages * sizeof(*iobuf->dr_blocks)); + OBD_FREE(iobuf->dr_pages, + num_pages * sizeof(*iobuf->dr_pages)); + OBD_FREE_PTR(iobuf); +} + +void filter_iobuf_put(struct filter_obd *filter, struct filter_iobuf *iobuf, + struct obd_trans_info *oti) +{ + int thread_id = (oti && oti->oti_thread) ? + oti->oti_thread->t_id : -1; + + if (unlikely(thread_id < 0)) { + filter_free_iobuf(iobuf); + return; + } + + LASSERTF(filter->fo_iobuf_pool[thread_id] == iobuf, + "iobuf mismatch for thread %d: pool %p iobuf %p\n", + thread_id, filter->fo_iobuf_pool[thread_id], iobuf); + filter_clear_iobuf(iobuf); +} + +int filter_iobuf_add_page(struct obd_device *obd, struct filter_iobuf *iobuf, + struct inode *inode, struct page *page) +{ + LASSERT(iobuf->dr_npages < iobuf->dr_max_pages); + iobuf->dr_pages[iobuf->dr_npages++] = page; + + return 0; +} + +int filter_do_bio(struct obd_export *exp, struct inode *inode, + struct filter_iobuf *iobuf, int rw) +{ + struct obd_device *obd = exp->exp_obd; + int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits; + struct page **pages = iobuf->dr_pages; + int npages = iobuf->dr_npages; + unsigned long *blocks = iobuf->dr_blocks; + int total_blocks = npages * blocks_per_page; + int sector_bits = inode->i_sb->s_blocksize_bits - 9; + unsigned int blocksize = inode->i_sb->s_blocksize; + struct bio *bio = NULL; + int frags = 0; + unsigned long start_time = jiffies; + struct page *page; + unsigned int page_offset; + sector_t sector; + int nblocks; + int block_idx; + int page_idx; + int i; + int rc = 0; + ENTRY; + + LASSERT(iobuf->dr_npages == npages); + LASSERT(total_blocks <= OBDFILTER_CREATED_SCRATCHPAD_ENTRIES); + + for (page_idx = 0, block_idx = 0; + page_idx < npages; + page_idx++, block_idx += blocks_per_page) { + + page = pages[page_idx]; + LASSERT (block_idx + blocks_per_page <= total_blocks); + + for (i = 0, page_offset = 0; + i < blocks_per_page; + i += nblocks, page_offset += blocksize * nblocks) { + + nblocks = 1; + + if (blocks[block_idx + i] == 0) { /* hole */ + LASSERT(rw == OBD_BRW_READ); + memset(kmap(page) + page_offset, 0, blocksize); + kunmap(page); + continue; + } + + sector = (sector_t)blocks[block_idx + i] << sector_bits; + + /* Additional contiguous file blocks? */ + while (i + nblocks < blocks_per_page && + (sector + (nblocks << sector_bits)) == + ((sector_t)blocks[block_idx + i + nblocks] << + sector_bits)) + nblocks++; + + /* I only set the page to be constant only if it + * is mapped to a contiguous underlying disk block(s). + * It will then make sure the corresponding device + * cache of raid5 will be overwritten by this page. + * - jay */ + if ((rw == OBD_BRW_WRITE) && + (nblocks == blocks_per_page) && + mapping_cap_page_constant_write(inode->i_mapping)) + SetPageConstant(page); + + if (bio != NULL && + can_be_merged(bio, sector) && + bio_add_page(bio, page, + blocksize * nblocks, page_offset) != 0) + continue; /* added this frag OK */ + + if (bio != NULL) { + struct request_queue *q = + bdev_get_queue(bio->bi_bdev); + + /* Dang! I have to fragment this I/O */ + CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) " + "sectors %d(%d) psg %d(%d) hsg %d(%d) " + "sector %llu next %llu\n", + bio->bi_size, + bio->bi_vcnt, bio->bi_max_vecs, + bio->bi_size >> 9, queue_max_sectors(q), + bio_phys_segments(q, bio), + queue_max_phys_segments(q), + bio_hw_segments(q, bio), + queue_max_hw_segments(q), + (unsigned long long)bio->bi_sector, + (unsigned long long)sector); + + record_start_io(iobuf, rw, bio->bi_size, exp); + rc = fsfilt_send_bio(rw, obd, inode, bio); + if (rc < 0) { + CERROR("Can't send bio: %d\n", rc); + record_finish_io(iobuf, rw, rc); + goto out; + } + frags++; + } + + /* allocate new bio, limited by max BIO size, b=9945 */ + bio = bio_alloc(GFP_NOIO, min(BIO_MAX_PAGES, + (npages - page_idx) * + blocks_per_page)); + if (bio == NULL) { + CERROR("Can't allocate bio %u*%u = %u pages\n", + (npages - page_idx), blocks_per_page, + (npages - page_idx) * blocks_per_page); + rc = -ENOMEM; + goto out; + } + + bio->bi_bdev = inode->i_sb->s_bdev; + bio->bi_sector = sector; + bio->bi_end_io = dio_complete_routine; + bio->bi_private = iobuf; + + rc = bio_add_page(bio, page, + blocksize * nblocks, page_offset); + LASSERT (rc != 0); + } + } + + if (bio != NULL) { + record_start_io(iobuf, rw, bio->bi_size, exp); + rc = fsfilt_send_bio(rw, obd, inode, bio); + if (rc >= 0) { + frags++; + rc = 0; + } else { + CERROR("Can't send bio: %d\n", rc); + record_finish_io(iobuf, rw, rc); + } + } + + out: + cfs_wait_event(iobuf->dr_wait, + cfs_atomic_read(&iobuf->dr_numreqs) == 0); + + if (rw == OBD_BRW_READ) { + lprocfs_oh_tally(&obd->u.filter.fo_filter_stats. + hist[BRW_R_DIO_FRAGS], + frags); + lprocfs_oh_tally_log2(&obd->u.filter. + fo_filter_stats.hist[BRW_R_IO_TIME], + jiffies - start_time); + if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) { + lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats-> + hist[BRW_R_DIO_FRAGS], + frags); + lprocfs_oh_tally_log2(&exp->exp_nid_stats-> + nid_brw_stats->hist[BRW_R_IO_TIME], + jiffies - start_time); + } + } else { + lprocfs_oh_tally(&obd->u.filter.fo_filter_stats. + hist[BRW_W_DIO_FRAGS], frags); + lprocfs_oh_tally_log2(&obd->u.filter.fo_filter_stats. + hist[BRW_W_IO_TIME], + jiffies - start_time); + if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) { + lprocfs_oh_tally(&exp->exp_nid_stats->nid_brw_stats-> + hist[BRW_W_DIO_FRAGS], + frags); + lprocfs_oh_tally_log2(&exp->exp_nid_stats-> + nid_brw_stats->hist[BRW_W_IO_TIME], + jiffies - start_time); + } + } + + if (rc == 0) + rc = iobuf->dr_error; + RETURN(rc); +} + +/* Must be called with i_mutex taken for writes; this will drop it */ +int filter_direct_io(int rw, struct dentry *dchild, struct filter_iobuf *iobuf, + struct obd_export *exp, struct iattr *attr, + struct obd_trans_info *oti, void **wait_handle) +{ + struct obd_device *obd = exp->exp_obd; + struct inode *inode = dchild->d_inode; + int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits; + int rc, rc2, create; + cfs_mutex_t *mutex; + ENTRY; + + LASSERTF(iobuf->dr_npages <= iobuf->dr_max_pages, "%d,%d\n", + iobuf->dr_npages, iobuf->dr_max_pages); + LASSERT(iobuf->dr_npages <= OBDFILTER_CREATED_SCRATCHPAD_ENTRIES); + + if (rw == OBD_BRW_READ) { + if (iobuf->dr_npages == 0) + RETURN(0); + create = 0; + mutex = NULL; + } else { + LASSERTF(rw == OBD_BRW_WRITE, "%x\n", rw); + LASSERT(iobuf->dr_npages > 0); + create = 1; + mutex = &obd->u.filter.fo_alloc_lock; + + lquota_enforce(filter_quota_interface_ref, obd, + iobuf->dr_ignore_quota); + } + + if (rw == OBD_BRW_WRITE && + OBD_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC)) { + rc = -ENOSPC; + } else { + rc = fsfilt_map_inode_pages(obd, inode, iobuf->dr_pages, + iobuf->dr_npages, iobuf->dr_blocks, + obdfilter_created_scratchpad, create, mutex); + } + + if (rw == OBD_BRW_WRITE) { + if (rc == 0) { + filter_tally(exp, iobuf->dr_pages, + iobuf->dr_npages, iobuf->dr_blocks, + blocks_per_page, 1); + if (attr->ia_size > i_size_read(inode)) + attr->ia_valid |= ATTR_SIZE; + rc = fsfilt_setattr(obd, dchild, + oti->oti_handle, attr, 0); + } + + UNLOCK_INODE_MUTEX(inode); + + /* Force commit to make the just-deleted blocks + * reusable. LU-456 */ + if (rc == -ENOSPC) { + fsfilt_commit(obd, inode, oti->oti_handle, 1); + RETURN(rc); + } + + rc2 = filter_finish_transno(exp, inode, oti, 0, 0); + if (rc2 != 0) { + CERROR("can't close transaction: %d\n", rc2); + if (rc == 0) + rc = rc2; + } + + if (wait_handle) + rc2 = fsfilt_commit_async(obd,inode,oti->oti_handle, + wait_handle); + else + rc2 = fsfilt_commit(obd, inode, oti->oti_handle, 0); + if (rc == 0) + rc = rc2; + if (rc != 0) + RETURN(rc); + } else if (rc == 0) { + filter_tally(exp, iobuf->dr_pages, iobuf->dr_npages, + iobuf->dr_blocks, blocks_per_page, 0); + } + + RETURN(filter_do_bio(exp, inode, iobuf, rw)); +} + /* See if there are unallocated parts in given file region */ static int filter_range_is_mapped(struct inode *inode, obd_size offset, int len) { @@ -95,24 +579,39 @@ static int filter_range_is_mapped(struct inode *inode, obd_size offset, int len) return 1; } +/* + * interesting use cases on how it interacts with VM: + * + * - vm writeout -- shouldn't see our pages as we don't mark them dirty + * though vm can find partial page left dirty by truncate. in this + * usual writeout is used unless our write rewrite that page - then we + * drop PG_dirty with PG_lock held. + * + * - else? + * + */ int filter_commitrw_write(struct obd_export *exp, struct obdo *oa, - int objcount, struct obd_ioobj *obj, int niocount, + int objcount, struct obd_ioobj *obj, + struct niobuf_remote *nb, int niocount, struct niobuf_local *res, struct obd_trans_info *oti, int rc) { - struct bio *bio = NULL; - int blocks_per_page, err; struct niobuf_local *lnb; + struct filter_iobuf *iobuf = NULL; struct lvfs_run_ctxt saved; struct fsfilt_objinfo fso; struct iattr iattr = { 0 }; - struct inode *inode = NULL; + struct inode *inode = res->dentry->d_inode; unsigned long now = jiffies; - int i, k, cleanup_phase = 0; - - struct dio_request *dreq = NULL; + int i, err, cleanup_phase = 0; struct obd_device *obd = exp->exp_obd; - + struct filter_obd *fo = &obd->u.filter; + void *wait_handle = NULL; + int total_size = 0; + unsigned int qcids[MAXQUOTAS] = { oa->o_uid, oa->o_gid }; + int rec_pending[MAXQUOTAS] = { 0, 0 }, quota_pages = 0; + int sync_journal_commit = obd->u.filter.fo_syncjournal; + int retries = 0; ENTRY; LASSERT(oti != NULL); @@ -122,135 +621,203 @@ int filter_commitrw_write(struct obd_export *exp, struct obdo *oa, if (rc != 0) GOTO(cleanup, rc); - inode = res->dentry->d_inode; - blocks_per_page = PAGE_SIZE >> inode->i_blkbits; - LASSERT(blocks_per_page <= MAX_BLOCKS_PER_PAGE); - - OBD_ALLOC(dreq, sizeof(*dreq)); - - if (dreq == NULL) - RETURN(-ENOMEM); - - dreq->bio_list = NULL; - init_waitqueue_head(&dreq->wait); - atomic_set(&dreq->numreqs, 0); - spin_lock_init(&dreq->lock); - + iobuf = filter_iobuf_get(&obd->u.filter, oti); + if (IS_ERR(iobuf)) + GOTO(cleanup, rc = PTR_ERR(iobuf)); cleanup_phase = 1; + fso.fso_dentry = res->dentry; fso.fso_bufcnt = obj->ioo_bufcnt; - push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); - cleanup_phase = 2; + iobuf->dr_ignore_quota = 0; + for (i = 0, lnb = res; i < niocount; i++, lnb++) { + loff_t this_size; + __u32 flags = lnb->flags; + + if (filter_range_is_mapped(inode, lnb->offset, lnb->len)) { + /* If overwriting an existing block, + * we don't need a grant */ + if (!(flags & OBD_BRW_GRANTED) && lnb->rc == -ENOSPC) + lnb->rc = 0; + } else { + quota_pages++; + } - oti->oti_handle = fsfilt_brw_start(obd, objcount, &fso, - niocount, res, oti); - - if (IS_ERR(oti->oti_handle)) { - rc = PTR_ERR(oti->oti_handle); - CDEBUG(rc == -ENOSPC ? D_INODE : D_ERROR, - "error starting transaction: rc = %d\n", rc); - oti->oti_handle = NULL; - GOTO(cleanup, rc); - } + if (lnb->rc) { /* ENOSPC, network RPC error, etc. */ + CDEBUG(D_INODE, "Skipping [%d] == %d\n", i, lnb->rc); + continue; + } - if (time_after(jiffies, now + 15 * HZ)) - CERROR("slow brw_start %lus\n", (jiffies - now) / HZ); + LASSERT(PageLocked(lnb->page)); + LASSERT(!PageWriteback(lnb->page)); - iattr_from_obdo(&iattr,oa,OBD_MD_FLATIME|OBD_MD_FLMTIME|OBD_MD_FLCTIME); - for (i = 0, lnb = res; i < obj->ioo_bufcnt; i++, lnb++) { - loff_t this_size; - sector_t sector; - int offs; + /* since write & truncate are serialized by the i_alloc_sem, + * even partial truncate should not leave dirty pages in + * the page cache */ + LASSERT(!PageDirty(lnb->page)); - /* If overwriting an existing block, we don't need a grant */ - if (!(lnb->flags & OBD_BRW_GRANTED) && lnb->rc == -ENOSPC && - filter_range_is_mapped(inode, lnb->offset, lnb->len)) - lnb->rc = 0; + SetPageUptodate(lnb->page); - if (lnb->rc) /* ENOSPC, network RPC error, etc. */ - continue; + err = filter_iobuf_add_page(obd, iobuf, inode, lnb->page); + LASSERT (err == 0); - /* get block number for next page */ - rc = fsfilt_map_inode_page(obd, inode, lnb->page, dreq->blocks, - dreq->created, 1); - if (rc != 0) - GOTO(cleanup, rc); - - for (k = 0; k < blocks_per_page; k++) { - sector = dreq->blocks[k] *(inode->i_sb->s_blocksize>>9); - offs = k * inode->i_sb->s_blocksize; - - if (!bio || !can_be_merged(bio, sector) || - !bio_add_page(bio, lnb->page, lnb->len, offs)) { - if (bio) { - atomic_inc(&dreq->numreqs); - submit_bio(WRITE, bio); - bio = NULL; - } - /* allocate new bio */ - bio = bio_alloc(GFP_NOIO, obj->ioo_bufcnt); - bio->bi_bdev = inode->i_sb->s_bdev; - bio->bi_sector = sector; - bio->bi_end_io = dio_complete_routine; - bio->bi_private = dreq; - - if (!bio_add_page(bio, lnb->page, lnb->len, 0)) - LBUG(); - } - } + total_size += lnb->len; /* we expect these pages to be in offset order, but we'll * be forgiving */ this_size = lnb->offset + lnb->len; if (this_size > iattr.ia_size) iattr.ia_size = this_size; - } -#warning This probably needs filemap_fdatasync() like filter_io_24 (bug 2366) - if (bio) { - atomic_inc(&dreq->numreqs); - fsfilt_send_bio(obd, inode, bio); + /* if one page is a write-back page from client cache and + * not from direct_io, or it's written by root, then mark + * the whole io request as ignore quota request, remote + * client can not break through quota. */ + if (exp_connect_rmtclient(exp)) + flags &= ~OBD_BRW_NOQUOTA; + if ((flags & OBD_BRW_NOQUOTA) || + (flags & (OBD_BRW_FROM_GRANT | OBD_BRW_SYNC)) == + OBD_BRW_FROM_GRANT) + iobuf->dr_ignore_quota = 1; + + if (!(lnb->flags & OBD_BRW_ASYNC)) { + sync_journal_commit = 1; + } } - /* time to wait for I/O completion */ - wait_event(dreq->wait, atomic_read(&dreq->numreqs) == 0); + /* we try to get enough quota to write here, and let ldiskfs + * decide if it is out of quota or not b=14783 */ + rc = lquota_chkquota(filter_quota_interface_ref, obd, exp, qcids, + rec_pending, quota_pages, oti, LQUOTA_FLAGS_BLK, + (void *)inode, obj->ioo_bufcnt); + if (rc == -ENOTCONN) + GOTO(cleanup, rc); + + if (OBD_FAIL_CHECK(OBD_FAIL_OST_DQACQ_NET)) + GOTO(cleanup, rc = -EINPROGRESS); + + push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); + cleanup_phase = 2; + + fsfilt_check_slow(obd, now, "quota init"); - /* free all bios */ - while (dreq->bio_list) { - bio = dreq->bio_list; - dreq->bio_list = bio->bi_private; - bio_put(bio); +retry: + LOCK_INODE_MUTEX(inode); + fsfilt_check_slow(obd, now, "i_mutex"); + oti->oti_handle = fsfilt_brw_start(obd, objcount, &fso, niocount, res, + oti); + if (IS_ERR(oti->oti_handle)) { + UNLOCK_INODE_MUTEX(inode); + rc = PTR_ERR(oti->oti_handle); + CDEBUG(rc == -ENOSPC ? D_INODE : D_ERROR, + "error starting transaction: rc = %d\n", rc); + oti->oti_handle = NULL; + GOTO(cleanup, rc); + } + /* have to call fsfilt_commit() from this point on */ + + fsfilt_check_slow(obd, now, "brw_start"); + + /* Locking order: i_mutex -> journal_lock -> dqptr_sem. LU-952 */ + ll_vfs_dq_init(inode); + + i = OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME; + + /* If the inode still has SUID+SGID bits set (see filter_precreate()) + * then we will accept the UID+GID if sent by the client for + * initializing the ownership of this inode. We only allow this to + * happen once (so clear these bits) and later only allow setattr. */ + if (inode->i_mode & S_ISUID) + i |= OBD_MD_FLUID; + if (inode->i_mode & S_ISGID) + i |= OBD_MD_FLGID; + + iattr_from_obdo(&iattr, oa, i); + if (iattr.ia_valid & (ATTR_UID | ATTR_GID)) { + unsigned int save; + + CDEBUG(D_INODE, "update UID/GID to %lu/%lu\n", + (unsigned long)oa->o_uid, (unsigned long)oa->o_gid); + + cfs_cap_raise(CFS_CAP_SYS_RESOURCE); + + iattr.ia_valid |= ATTR_MODE; + iattr.ia_mode = inode->i_mode; + if (iattr.ia_valid & ATTR_UID) + iattr.ia_mode &= ~S_ISUID; + if (iattr.ia_valid & ATTR_GID) + iattr.ia_mode &= ~S_ISGID; + + rc = filter_update_fidea(exp, inode, oti->oti_handle, oa); + + /* To avoid problems with quotas, UID and GID must be set + * in the inode before filter_direct_io() - see bug 10357. */ + save = iattr.ia_valid; + iattr.ia_valid &= (ATTR_UID | ATTR_GID); + rc = fsfilt_setattr(obd, res->dentry, oti->oti_handle,&iattr,0); + CDEBUG(D_QUOTA, "set uid(%u)/gid(%u) to ino(%lu). rc(%d)\n", + iattr.ia_uid, iattr.ia_gid, inode->i_ino, rc); + iattr.ia_valid = save & ~(ATTR_UID | ATTR_GID); } - down(&inode->i_sem); - if (iattr.ia_size > inode->i_size) { - CDEBUG(D_INFO, "setting i_size to "LPU64"\n", - iattr.ia_size); - - iattr.ia_valid |= ATTR_SIZE; - - fsfilt_setattr(obd, res->dentry, oti->oti_handle, - &iattr, 0); + /* filter_direct_io drops i_mutex */ + rc = filter_direct_io(OBD_BRW_WRITE, res->dentry, iobuf, exp, &iattr, + oti, sync_journal_commit ? &wait_handle : NULL); + if (rc == -ENOSPC && retries++ < 3) { + CDEBUG(D_INODE, "retry after force commit, retries:%d\n", + retries); + oti->oti_handle = NULL; + fsfilt_check_slow(obd, now, "direct_io"); + goto retry; } - up(&inode->i_sem); - if (time_after(jiffies, now + 15 * HZ)) - CERROR("slow direct_io %lus\n", (jiffies - now) / HZ); + obdo_from_inode(oa, inode, (rc == 0 ? FILTER_VALID_FLAGS : 0) | + OBD_MD_FLUID | OBD_MD_FLGID); + + lquota_getflag(filter_quota_interface_ref, obd, oa); + + fsfilt_check_slow(obd, now, "direct_io"); - rc = filter_finish_transno(exp, oti, rc); + if (wait_handle) + err = fsfilt_commit_wait(obd, inode, wait_handle); + else + err = 0; - err = fsfilt_commit(obd, inode, oti->oti_handle, obd_sync_filter); - if (err) - rc = err; + if (err) { + CERROR("Failure to commit OST transaction (%d)?\n", err); + if (rc == 0) + rc = err; + } - if (obd_sync_filter) - LASSERT(oti->oti_transno <= obd->obd_last_committed); + /* In rare cases fsfilt_commit_wait() will wake up and return after + * the transaction has finished its work and updated j_commit_sequence + * but the commit callbacks have not been run yet. Wait here until + * that is finished so that clients requesting sync IO don't see the + * reply transno < last_committed. LU-753 */ + if (unlikely(obd->obd_replayable && !rc && wait_handle && + oti->oti_transno > obd->obd_last_committed)) { + cfs_waitq_t wq; + struct l_wait_info lwi = + LWI_TIMEOUT_INTERVAL(cfs_time_seconds(5), + (cfs_duration_t)((HZ + 4)/5), + NULL, NULL); + cfs_waitq_init(&wq); + l_wait_event(wq, + oti->oti_transno <= obd->obd_last_committed, + &lwi); + + /* commit callback isn't done after waiting for 5 secs ? */ + if (unlikely(oti->oti_transno > obd->obd_last_committed)) + CERROR("transno:"LPU64" > last_committed:"LPU64"\n", + oti->oti_transno, obd->obd_last_committed); + } - if (time_after(jiffies, now + 15 * HZ)) - CERROR("slow commitrw commit %lus\n", (jiffies - now) / HZ); + fsfilt_check_slow(obd, now, "commitrw commit"); cleanup: + lquota_pending_commit(filter_quota_interface_ref, obd, qcids, + rec_pending, 1); + filter_grant_commit(exp, niocount, res); switch (cleanup_phase) { @@ -258,16 +825,55 @@ cleanup: pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); LASSERT(current->journal_info == NULL); case 1: - OBD_FREE(dreq, sizeof(*dreq)); + filter_iobuf_put(&obd->u.filter, iobuf, oti); case 0: - for (i = 0, lnb = res; i < obj->ioo_bufcnt; i++, lnb++) { - /* flip_.. gets a ref, while free_page only frees - * when it decrefs to 0 */ - if (rc == 0) - flip_into_page_cache(inode, lnb->page); - __free_page(lnb->page); - } - f_dput(res->dentry); + /* + * lnb->page automatically returns back into per-thread page + * pool (bug 5137) + */ + break; + } + + /* trigger quota pre-acquire */ + err = lquota_adjust(filter_quota_interface_ref, obd, qcids, NULL, rc, + FSFILT_OP_CREATE); + CDEBUG(err ? D_ERROR : D_QUOTA, "filter adjust qunit! " + "(rc:%d, uid:%u, gid:%u)\n", + err, qcids[USRQUOTA], qcids[GRPQUOTA]); + if (qcids[USRQUOTA] != oa->o_uid || qcids[GRPQUOTA] != oa->o_gid) { + qcids[USRQUOTA] = oa->o_uid; + qcids[GRPQUOTA] = oa->o_gid; + err = lquota_adjust(filter_quota_interface_ref, obd, qcids, + NULL, rc, FSFILT_OP_CREATE); + CDEBUG(err ? D_ERROR : D_QUOTA, "filter adjust qunit! " + "(rc:%d, uid:%u, gid:%u)\n", + err, qcids[USRQUOTA], qcids[GRPQUOTA]); + } + + for (i = 0, lnb = res; i < niocount; i++, lnb++) { + if (lnb->page == NULL) + continue; + + if (rc) + /* If the write has failed, the page cache may + * not be consitent with what is on disk, so + * force pages to be reread next time it is + * accessed */ + ClearPageUptodate(lnb->page); + + LASSERT(PageLocked(lnb->page)); + unlock_page(lnb->page); + + page_cache_release(lnb->page); + lnb->page = NULL; + } + f_dput(res->dentry); + + if (inode) { + if (fo->fo_writethrough_cache == 0 || + i_size_read(inode) > fo->fo_readcache_max_filesize) + filter_release_cache(obd, obj, nb, inode); + up_read(&inode->i_alloc_sem); } RETURN(rc);