* Author: Andreas Dilger <adilger@clusterfs.com>
* Author: Phil Schwan <phil@clusterfs.com>
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This file is part of the Lustre file system, http://www.lustre.org
+ * Lustre is a trademark of Cluster File Systems, Inc.
*
- * 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.
+ * You may have signed or agreed to another license before downloading
+ * this software. If so, you are bound by the terms and conditions
+ * of that agreement, and the following does not apply to you. See the
+ * LICENSE file included with this distribution for more information.
*
- * 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.
+ * If you did not agree to a different license, then this copy of Lustre
+ * is open source 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.
*
- * 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.
+ * In either case, 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
+ * license text for more details.
*/
+#ifdef HAVE_KERNEL_CONFIG_H
#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"
-
/* 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 {
+ atomic_t dr_numreqs; /* number of reqs being processed */
+ wait_queue_head_t dr_wait;
+ int dr_max_pages;
+ int dr_npages;
+ int dr_error;
+ struct page **dr_pages;
+ unsigned long *dr_blocks;
+ spinlock_t dr_lock; /* IRQ lock */
+ 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;
+
+ atomic_inc(&iobuf->dr_numreqs);
+
+ if (rw == OBD_BRW_READ) {
+ atomic_inc(&filter->fo_r_in_flight);
+ lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_R_RPC_HIST],
+ atomic_read(&filter->fo_r_in_flight));
+ lprocfs_oh_tally_log2(&filter->fo_filter_stats.hist[BRW_R_DISK_IOSIZE], size);
+ lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_RPC_HIST],
+ atomic_read(&filter->fo_r_in_flight));
+ lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_R_DISK_IOSIZE], size);
+ } else {
+ atomic_inc(&filter->fo_w_in_flight);
+ lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_W_RPC_HIST],
+ atomic_read(&filter->fo_w_in_flight));
+ lprocfs_oh_tally_log2(&filter->fo_filter_stats.hist[BRW_W_DISK_IOSIZE], size);
+ lprocfs_oh_tally(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_RPC_HIST],
+ atomic_read(&filter->fo_w_in_flight));
+ lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_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)
+ atomic_dec(&filter->fo_r_in_flight);
+ else
+ atomic_dec(&filter->fo_w_in_flight);
+
+ if (atomic_dec_and_test(&iobuf->dr_numreqs))
+ wake_up(&iobuf->dr_wait);
+}
+
static int dio_complete_routine(struct bio *bio, unsigned int done, int error)
{
- struct dio_request *dreq = bio->bi_private;
- unsigned long flags;
+ struct filter_iobuf *iobuf = bio->bi_private;
+ unsigned long flags;
+
+ /* CAVEAT EMPTOR: possibly in IRQ context
+ * DO NOT record procfs stats here!!! */
+
+ if (bio->bi_size) /* Not complete */
+ return 1;
+
+ if (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 CFS, 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 I/O -- so 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, atomic_read(&bio->bi_cnt),
+ bio->bi_private);
+ 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);
+ spin_lock_irqsave(&iobuf->dr_lock, flags);
+ if (iobuf->dr_error == 0)
+ iobuf->dr_error = error;
+ spin_unlock_irqrestore(&iobuf->dr_lock, flags);
+ record_finish_io(iobuf, test_bit(BIO_RW, &bio->bi_rw) ?
+ OBD_BRW_WRITE : OBD_BRW_READ, 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);
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;
}
+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;
+ init_waitqueue_head(&iobuf->dr_wait);
+ atomic_set(&iobuf->dr_numreqs, 0);
+ spin_lock_init(&iobuf->dr_lock);
+ iobuf->dr_max_pages = num_pages;
+ iobuf->dr_npages = 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;
+ 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_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 = blocks[block_idx + i] << sector_bits;
+
+ /* Additional contiguous file blocks? */
+ while (i + nblocks < blocks_per_page &&
+ (sector + nblocks*(blocksize>>9)) ==
+ (blocks[block_idx + i + nblocks] << sector_bits))
+ nblocks++;
+
+ 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) {
+ request_queue_t *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)\n",
+ bio->bi_size,
+ bio->bi_vcnt, bio->bi_max_vecs,
+ bio->bi_size >> 9, q->max_sectors,
+ bio_phys_segments(q, bio),
+ q->max_phys_segments,
+ bio_hw_segments(q, bio),
+ q->max_hw_segments);
+
+ 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 */
+ bio = bio_alloc(GFP_NOIO,
+ (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:
+ wait_event(iobuf->dr_wait, 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(&exp->exp_filter_data.fed_brw_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);
+ lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_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(&exp->exp_filter_data.fed_brw_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);
+ lprocfs_oh_tally_log2(&exp->exp_filter_data.fed_brw_stats.hist[BRW_W_IO_TIME],
+ jiffies - start_time);
+ }
+
+ if (rc == 0)
+ rc = iobuf->dr_error;
+ RETURN(rc);
+}
+
+/* These are our hacks to keep our directio/bh IO coherent with ext3's
+ * page cache use. Most notably ext3 reads file data into the page
+ * cache when it is zeroing the tail of partial-block truncates and
+ * leaves it there, sometimes generating io from it at later truncates.
+ * This removes the partial page and its buffers from the page cache,
+ * so it should only ever cause a wait in rare cases, as otherwise we
+ * always do full-page IO to the OST.
+ *
+ * The call to truncate_complete_page() will call journal_invalidatepage()
+ * to free the buffers and drop the page from cache. The buffers should
+ * not be dirty, because we already called fdatasync/fdatawait on them.
+ */
+static int filter_sync_inode_data(struct inode *inode, int locked)
+{
+ int rc = 0;
+
+ /* This is nearly do_fsync(), without the waiting on the inode */
+ /* XXX: in 2.6.16 (at least) we don't need to hold i_mutex over
+ * filemap_fdatawrite() and filemap_fdatawait(), so we may no longer
+ * need this lock here at all. */
+ if (!locked)
+ LOCK_INODE_MUTEX(inode);
+ if (inode->i_mapping->nrpages) {
+ current->flags |= PF_SYNCWRITE;
+ rc = filemap_fdatawrite(inode->i_mapping);
+ if (rc == 0)
+ rc = filemap_fdatawait(inode->i_mapping);
+ current->flags &= ~PF_SYNCWRITE;
+ }
+ if (!locked)
+ UNLOCK_INODE_MUTEX(inode);
+
+ return rc;
+}
+
+/* Clear pages from the mapping before we do direct IO to that offset.
+ * Now that the only source of such pages in the truncate path flushes
+ * these pages to disk and then discards them, this is error condition.
+ * If add back read cache this will happen again. This could be disabled
+ * until that time if we never see the below error. */
+static int filter_clear_page_cache(struct inode *inode,
+ struct filter_iobuf *iobuf)
+{
+ struct page *page;
+ int i, rc;
+
+ rc = filter_sync_inode_data(inode, 0);
+ if (rc != 0)
+ RETURN(rc);
+
+ /* be careful to call this after fsync_inode_data_buffers has waited
+ * for IO to complete before we evict it from the cache */
+ for (i = 0; i < iobuf->dr_npages; i++) {
+ page = find_lock_page(inode->i_mapping,
+ iobuf->dr_pages[i]->index);
+ if (page == NULL)
+ continue;
+ if (page->mapping != NULL) {
+ CERROR("page %lu (%d/%d) in page cache during write!\n",
+ page->index, i, iobuf->dr_npages);
+ wait_on_page_writeback(page);
+ ll_truncate_complete_page(page);
+ }
+
+ unlock_page(page);
+ page_cache_release(page);
+ }
+
+ return 0;
+}
+
+int filter_clear_truncated_page(struct inode *inode)
+{
+ struct page *page;
+ int rc;
+
+ /* Truncate on page boundary, so nothing to flush? */
+ if (!(inode->i_size & ~CFS_PAGE_MASK))
+ return 0;
+
+ rc = filter_sync_inode_data(inode, 1);
+ if (rc != 0)
+ RETURN(rc);
+
+ /* be careful to call this after fsync_inode_data_buffers has waited
+ * for IO to complete before we evict it from the cache */
+ page = find_lock_page(inode->i_mapping,
+ inode->i_size >> CFS_PAGE_SHIFT);
+ if (page) {
+ if (page->mapping != NULL) {
+ wait_on_page_writeback(page);
+ ll_truncate_complete_page(page);
+ }
+ unlock_page(page);
+ page_cache_release(page);
+ }
+
+ return 0;
+}
+
+/* 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;
+ struct semaphore *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);
+ }
+remap:
+ rc = fsfilt_map_inode_pages(obd, inode, iobuf->dr_pages,
+ iobuf->dr_npages, iobuf->dr_blocks,
+ obdfilter_created_scratchpad, create, sem);
+
+ if (rc == -EDQUOT) {
+ LASSERT(rw == OBD_BRW_WRITE &&
+ !cap_raised(current->cap_effective, CAP_SYS_RESOURCE));
+
+ /* Unfortunately, if quota master is too busy to handle the
+ * pre-dqacq in time or this user has exceeded quota limit, we
+ * have to wait for the completion of in flight dqacq/dqrel,
+ * then try again */
+ if (lquota_acquire(filter_quota_interface_ref, obd,
+ inode->i_uid, inode->i_gid))
+ goto remap;
+ }
+
+ if (rw == OBD_BRW_WRITE) {
+ if (rc == 0) {
+ filter_tally_write(exp, iobuf->dr_pages,
+ iobuf->dr_npages, iobuf->dr_blocks,
+ blocks_per_page);
+ if (attr->ia_size > inode->i_size)
+ attr->ia_valid |= ATTR_SIZE;
+ rc = fsfilt_setattr(obd, dchild,
+ oti->oti_handle, attr, 0);
+ }
+
+ UNLOCK_INODE_MUTEX(inode);
+
+ rc2 = filter_finish_transno(exp, oti, 0);
+ if (rc2 != 0) {
+ CERROR("can't close transaction: %d\n", rc2);
+ if (rc == 0)
+ rc = rc2;
+ }
+
+ rc2 =fsfilt_commit_async(obd,inode,oti->oti_handle,wait_handle);
+ if (rc == 0)
+ rc = rc2;
+ if (rc != 0)
+ RETURN(rc);
+ } else if (rc == 0) {
+ filter_tally_read(exp, iobuf->dr_pages,
+ iobuf->dr_npages, iobuf->dr_blocks,
+ blocks_per_page);
+ }
+
+ rc = filter_clear_page_cache(inode, iobuf);
+ if (rc != 0)
+ RETURN(rc);
+
+ 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)
{
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;
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;
-
+ void *wait_handle;
+ int total_size = 0;
+ unsigned int qcids[MAXQUOTAS] = {0, 0};
ENTRY;
LASSERT(oti != NULL);
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;
+ inode = res->dentry->d_inode;
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- cleanup_phase = 2;
-
- 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 (time_after(jiffies, now + 15 * HZ))
- CERROR("slow brw_start %lus\n", (jiffies - now) / HZ);
-
- iattr_from_obdo(&iattr,oa,OBD_MD_FLATIME|OBD_MD_FLMTIME|OBD_MD_FLCTIME);
+ iobuf->dr_ignore_quota = 0;
for (i = 0, lnb = res; i < obj->ioo_bufcnt; i++, lnb++) {
loff_t this_size;
- sector_t sector;
- struct page *pages[1];
- int offs;
/* 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;
- if (lnb->rc) /* ENOSPC, network RPC error, etc. */
+ if (lnb->rc) { /* ENOSPC, network RPC error, etc. */
+ CDEBUG(D_INODE, "Skipping [%d] == %d\n", i, lnb->rc);
continue;
-
- /* get block number for next page */
- pages[0] = lnb->page;
- rc = fsfilt_map_inode_pages(obd, inode, pages, 1,
- dreq->blocks, dreq->created, 1,
- NULL);
- 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();
- }
}
+ 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
* 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, or it's
+ * written by root, then mark the whole io request as ignore
+ * quota request */
+ if (lnb->flags & (OBD_BRW_FROM_GRANT | OBD_BRW_NOQUOTA))
+ iobuf->dr_ignore_quota = 1;
}
- /* time to wait for I/O completion */
- wait_event(dreq->wait, atomic_read(&dreq->numreqs) == 0);
+ 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);
- }
+ DQUOT_INIT(inode);
- 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);
+ LOCK_INODE_MUTEX(inode);
+ fsfilt_check_slow(obd, now, obd_timeout, "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);
}
- up(&inode->i_sem);
+ /* have to call fsfilt_commit() from this point on */
+
+ fsfilt_check_slow(obd, now, obd_timeout, "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);
+
+ cap_raise(current->cap_effective, 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);
+ }
+
+ /* filter_direct_io drops i_mutex */
+ rc = filter_direct_io(OBD_BRW_WRITE, res->dentry, iobuf, exp, &iattr,
+ oti, &wait_handle);
+ if (rc == 0)
+ obdo_from_inode(oa, inode,
+ FILTER_VALID_FLAGS |OBD_MD_FLUID |OBD_MD_FLGID);
+ else
+ obdo_from_inode(oa, inode, OBD_MD_FLUID | OBD_MD_FLGID);
- if (time_after(jiffies, now + 15 * HZ))
- CERROR("slow direct_io %lus\n", (jiffies - now) / HZ);
+ lquota_getflag(filter_quota_interface_ref, obd, oa);
- rc = filter_finish_transno(exp, oti, rc);
+ fsfilt_check_slow(obd, now, obd_timeout, "direct_io");
- err = fsfilt_commit(obd, inode, oti->oti_handle, obd_sync_filter);
- if (err)
+ err = fsfilt_commit_wait(obd, inode, wait_handle);
+ if (err) {
+ CERROR("Failure to commit OST transaction (%d)?\n", err);
rc = err;
+ }
- if (obd_sync_filter)
- LASSERT(oti->oti_transno <= obd->obd_last_committed);
+ if (obd->obd_replayable && !rc)
+ LASSERTF(oti->oti_transno <= obd->obd_last_committed,
+ "oti_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, obd_timeout, "commitrw commit");
cleanup:
filter_grant_commit(exp, niocount, res);
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++) {
- filter_release_write_page(&obd->u.filter,
- res->dentry->d_inode, lnb,
- rc);
- }
-
+ /*
+ * lnb->page automatically returns back into per-thread page
+ * pool (bug 5137)
+ */
f_dput(res->dentry);
}
+ /* trigger quota pre-acquire */
+ 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)\n", err);
+
RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff