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Koen Kooi
189ce92b4c
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
46 lines
1.5 KiB
Diff
46 lines
1.5 KiB
Diff
From 1075b6106024e51af7a5108626091322d2e91710 Mon Sep 17 00:00:00 2001
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From: Dave Chinner <dchinner@redhat.com>
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Date: Wed, 18 Jan 2012 14:41:45 -0600
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Subject: [PATCH 118/129] xfs: fix endian conversion issue in discard code
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commit b1c770c273a4787069306fc82aab245e9ac72e9d upstream
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When finding the longest extent in an AG, we read the value directly
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out of the AGF buffer without endian conversion. This will give an
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incorrect length, resulting in FITRIM operations potentially not
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trimming everything that it should.
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Signed-off-by: Dave Chinner <dchinner@redhat.com>
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Reviewed-by: Christoph Hellwig <hch@lst.de>
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Signed-off-by: Ben Myers <bpm@sgi.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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---
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fs/xfs/xfs_discard.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
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index 8a24f0c..286a051 100644
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--- a/fs/xfs/xfs_discard.c
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+++ b/fs/xfs/xfs_discard.c
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@@ -68,7 +68,7 @@ xfs_trim_extents(
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* Look up the longest btree in the AGF and start with it.
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*/
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error = xfs_alloc_lookup_le(cur, 0,
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- XFS_BUF_TO_AGF(agbp)->agf_longest, &i);
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+ be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_longest), &i);
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if (error)
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goto out_del_cursor;
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@@ -84,7 +84,7 @@ xfs_trim_extents(
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if (error)
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goto out_del_cursor;
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XFS_WANT_CORRUPTED_GOTO(i == 1, out_del_cursor);
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- ASSERT(flen <= XFS_BUF_TO_AGF(agbp)->agf_longest);
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+ ASSERT(flen <= be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_longest));
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/*
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* Too small? Give up.
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--
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1.7.9.5
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