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From: Dave Chinner <david@fromorbit.com>
To: linux-xfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Subject: [PATCH 14/16] xfs: align writepages to large block sizes
Date: Wed,  7 Nov 2018 17:31:25 +1100	[thread overview]
Message-ID: <20181107063127.3902-15-david@fromorbit.com> (raw)
In-Reply-To: <20181107063127.3902-1-david@fromorbit.com>

From: Dave Chinner <dchinner@redhat.com>

For data integrity purposes, we need to write back the entire
filesystem block when asked to sync a sub-block range of the file.
When the filesystem block size is larger than the page size, this
means we need to convert single page integrity writes into whole
block integrity writes. We do this by extending the writepage range
to filesystem block granularity and alignment.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
 fs/xfs/xfs_aops.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index f6ef9e0a7312..5334f16be166 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -900,6 +900,7 @@ xfs_vm_writepages(
 		.io_type = XFS_IO_HOLE,
 	};
 	int			ret;
+	unsigned		bsize =	i_blocksize(mapping->host);
 
 	/*
 	 * Refuse to write pages out if we are called from reclaim context.
@@ -922,6 +923,19 @@ xfs_vm_writepages(
 	if (WARN_ON_ONCE(current->flags & PF_MEMALLOC_NOFS))
 		return 0;
 
+	/*
+	 * If the block size is larger than page size, extent the incoming write
+	 * request to fsb granularity and alignment. This is a requirement for
+	 * data integrity operations and it doesn't hurt for other write
+	 * operations, so do it unconditionally.
+	 */
+	if (wbc->range_start)
+		wbc->range_start = round_down(wbc->range_start, bsize);
+	if (wbc->range_end != LLONG_MAX)
+		wbc->range_end = round_up(wbc->range_end, bsize);
+	if (wbc->nr_to_write < wbc->range_end - wbc->range_start)
+		wbc->nr_to_write = round_up(wbc->nr_to_write, bsize);
+
 	xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED);
 	ret = write_cache_pages(mapping, wbc, xfs_do_writepage, &wpc);
 	if (wpc.ioend)
-- 
2.19.1

  parent reply	other threads:[~2018-11-07 16:01 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-07  6:31 [RFC PATCH 00/16] xfs: Block size > PAGE_SIZE support Dave Chinner
2018-11-07  6:31 ` [PATCH 01/16] xfs: drop ->writepage completely Dave Chinner
2018-11-09 15:12   ` Christoph Hellwig
2018-11-12 21:08     ` Dave Chinner
2021-02-02 20:51       ` Darrick J. Wong
2018-11-07  6:31 ` [PATCH 02/16] xfs: move writepage context warnings to writepages Dave Chinner
2018-11-07  6:31 ` [PATCH 03/16] xfs: finobt AG reserves don't consider last AG can be a runt Dave Chinner
2018-11-07 16:55   ` Darrick J. Wong
2018-11-09  0:21     ` Dave Chinner
2018-11-07  6:31 ` [PATCH 04/16] xfs: extent shifting doesn't fully invalidate page cache Dave Chinner
2018-11-07  6:31 ` [PATCH 05/16] iomap: sub-block dio needs to zeroout beyond EOF Dave Chinner
2018-11-09 15:15   ` Christoph Hellwig
2018-11-07  6:31 ` [PATCH 06/16] iomap: support block size > page size for direct IO Dave Chinner
2018-11-08 11:28   ` Nikolay Borisov
2018-11-09 15:18   ` Christoph Hellwig
2018-11-11  1:12     ` Dave Chinner
2018-11-07  6:31 ` [PATCH 07/16] iomap: prepare buffered IO paths for block size > page size Dave Chinner
2018-11-09 15:19   ` Christoph Hellwig
2018-11-11  1:15     ` Dave Chinner
2018-11-07  6:31 ` [PATCH 08/16] iomap: mode iomap_zero_range and friends Dave Chinner
2018-11-09 15:19   ` Christoph Hellwig
2018-11-07  6:31 ` [PATCH 09/16] iomap: introduce zero-around functionality Dave Chinner
2018-11-07  6:31 ` [PATCH 10/16] iomap: enable zero-around for iomap_zero_range() Dave Chinner
2018-11-07  6:31 ` [PATCH 11/16] iomap: Don't mark partial pages zeroing uptodate for zero-around Dave Chinner
2018-11-07  6:31 ` [PATCH 12/16] iomap: zero-around in iomap_page_mkwrite Dave Chinner
2018-11-07  6:31 ` [PATCH 13/16] xfs: add zero-around controls to iomap Dave Chinner
2018-11-07  6:31 ` Dave Chinner [this message]
2018-11-09 15:22   ` [PATCH 14/16] xfs: align writepages to large block sizes Christoph Hellwig
2018-11-11  1:20     ` Dave Chinner
2018-11-11 16:32       ` Christoph Hellwig
2018-11-14 14:19   ` Brian Foster
2018-11-14 21:18     ` Dave Chinner
2018-11-15 12:55       ` Brian Foster
2018-11-16  6:19         ` Dave Chinner
2018-11-16 13:29           ` Brian Foster
2018-11-19  1:14             ` Dave Chinner
2018-11-07  6:31 ` [PATCH 15/16] xfs: expose block size in stat Dave Chinner
2018-11-07  6:31 ` [PATCH 16/16] xfs: enable block size larger than page size support Dave Chinner
2018-11-07 17:14 ` [RFC PATCH 00/16] xfs: Block size > PAGE_SIZE support Darrick J. Wong
2018-11-07 22:04   ` Dave Chinner
2018-11-08  1:38     ` Darrick J. Wong
2018-11-08  9:04       ` Dave Chinner
2018-11-08 22:17         ` Darrick J. Wong
2018-11-08 22:22           ` Dave Chinner

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