/* -*- 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 <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
- * Author: Phil Schwan <phil@clusterfs.com>
+ * 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.
+ */
+/*
+ * 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 <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
*/
+#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
+#endif
#include <linux/module.h>
#include <linux/pagemap.h> // XXX kill me soon
#include <linux/version.h>
+#include <linux/buffer_head.h>
#define DEBUG_SUBSYSTEM S_FILTER
-#include <linux/obd_class.h>
-#include <linux/lustre_fsfilt.h>
+#include <obd_class.h>
+#include <lustre_fsfilt.h>
+#include <lustre_quota.h>
#include "filter_internal.h"
-#warning "implement writeback mode -bzzz"
-
-int ext3_map_inode_page(struct inode *inode, struct page *page,
- unsigned long *blocks, int *created, int create);
-
/* 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 <http://bugs.whamcloud.com/>, 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;
return bio->bi_sector + size == sector ? 1 : 0;
}
-int filter_commitrw_write(struct obd_export *exp, struct obdo *oa, int objcount,
- struct obd_ioobj *obj, int niocount,
- struct niobuf_local *res, struct obd_trans_info *oti)
+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;
- struct obd_run_ctxt saved;
+ 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_semaphore_t *sem;
+ 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;
+ sem = NULL;
+ } else {
+ LASSERTF(rw == OBD_BRW_WRITE, "%x\n", rw);
+ LASSERT(iobuf->dr_npages > 0);
+ create = 1;
+ sem = &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, sem);
+ }
+
+ 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)
+{
+ sector_t (*fs_bmap)(struct address_space *, sector_t) =
+ inode->i_mapping->a_ops->bmap;
+ int j;
+
+ /* We can't know if we are overwriting or not */
+ if (fs_bmap == NULL)
+ return 0;
+
+ offset >>= inode->i_blkbits;
+ len >>= inode->i_blkbits;
+
+ for (j = 0; j <= len; j++)
+ if (fs_bmap(inode->i_mapping, offset + j) == 0)
+ return 0;
+
+ 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,
+ struct niobuf_remote *nb, int niocount,
+ struct niobuf_local *res, struct obd_trans_info *oti,
+ int rc)
+{
struct niobuf_local *lnb;
+ struct filter_iobuf *iobuf = NULL;
+ struct lvfs_run_ctxt saved;
struct fsfilt_objinfo fso;
- struct iattr iattr = { .ia_valid = ATTR_SIZE, .ia_size = 0, };
- struct inode *inode = NULL;
- int rc = 0, i, k, cleanup_phase = 0, err;
- unsigned long now = jiffies; /* DEBUGGING OST TIMEOUTS */
- int blocks_per_page;
- struct dio_request *dreq;
- struct bio *bio = NULL;
+ struct iattr iattr = { 0 };
+ struct inode *inode = res->dentry->d_inode;
+ unsigned long now = jiffies;
+ 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);
LASSERT(objcount == 1);
LASSERT(current->journal_info == NULL);
- 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);
+ if (rc != 0)
+ GOTO(cleanup, rc);
+ 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_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, 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));
- 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));
- /* get block number for next page */
- rc = ext3_map_inode_page(inode, lnb->page, dreq->blocks,
- dreq->created, 1);
- if (rc)
- 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();
- }
- }
+ SetPageUptodate(lnb->page);
+
+ err = filter_iobuf_add_page(obd, iobuf, inode, lnb->page);
+ LASSERT (err == 0);
+
+ total_size += lnb->len;
- /* We expect these pages to be in offset order, but we'll
+ /* 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);
- submit_bio(WRITE, 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);
+
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ cleanup_phase = 2;
- /* free all bios */
- while (dreq->bio_list) {
- bio = dreq->bio_list;
- dreq->bio_list = bio->bi_private;
- bio_put(bio);
+ ll_vfs_dq_init(inode);
+ fsfilt_check_slow(obd, now, "quota init");
+
+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");
+
+ 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);
}
- if (rc == 0) {
- down(&inode->i_sem);
- inode_update_time(inode, 1);
- if (iattr.ia_size > inode->i_size) {
- CDEBUG(D_INFO, "setting i_size to "LPU64"\n",
- iattr.ia_size);
- fsfilt_setattr(obd, res->dentry, oti->oti_handle,
- &iattr, 0);
- }
- up(&inode->i_sem);
+ /* 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;
}
- if (time_after(jiffies, now + 15 * HZ))
- CERROR("slow direct_io %lus\n", (jiffies - now) / HZ);
+ obdo_from_inode(oa, inode, NULL, rc == 0 ? FILTER_VALID_FLAGS : 0 |
+ OBD_MD_FLUID |OBD_MD_FLGID);
- rc = filter_finish_transno(exp, oti, rc);
- err = fsfilt_commit(obd, inode, oti->oti_handle, obd_sync_filter);
- if (err)
- rc = err;
- if (obd_sync_filter)
- LASSERT(oti->oti_transno <= obd->obd_last_committed);
- if (time_after(jiffies, now + 15 * HZ))
- CERROR("slow commitrw commit %lus\n", (jiffies - now) / HZ);
+ lquota_getflag(filter_quota_interface_ref, obd, oa);
+
+ fsfilt_check_slow(obd, now, "direct_io");
+
+ if (wait_handle)
+ err = fsfilt_commit_wait(obd, inode, wait_handle);
+ else
+ err = 0;
+
+ if (err) {
+ CERROR("Failure to commit OST transaction (%d)?\n", err);
+ if (rc == 0)
+ rc = err;
+ }
+
+ if (obd->obd_replayable && !rc && wait_handle)
+ LASSERTF(oti->oti_transno <= obd->obd_last_committed,
+ "oti_transno "LPU64" last_committed "LPU64"\n",
+ oti->oti_transno, obd->obd_last_committed);
+
+ 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) {
case 2:
- pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+ 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);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff