linux-kernel - [PATCH 5/8] nilfs2: simplify handling of active state of segments fix

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Message-Id: <1239341281-20249-6-git-send-email-konishi.ryusuke@lab.ntt.co.jp>
Date:	Fri, 10 Apr 2009 14:27:58 +0900
From:	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
To:	linux-fsdevel@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
Subject: [PATCH 5/8] nilfs2: simplify handling of active state of segments fix

This fixes a bug of ("nilfs2: simplify handling of active state of
segments") patch.  The patch did not take account that a base index is
increased in nilfs_sufile_get_suinfo() function if requested entries
go across block boundary on sufile.

Due to this bug, the active flag sometimes appears on wrong segments
and has induced malfunction of garbage collection.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
---
 fs/nilfs2/sufile.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index c774cf3..1ef2b4d 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -625,7 +625,7 @@ ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum,
 			si[i + j].sui_nblocks = le32_to_cpu(su->su_nblocks);
 			si[i + j].sui_flags = le32_to_cpu(su->su_flags) &
 				~(1UL << NILFS_SEGMENT_USAGE_ACTIVE);
-			if (nilfs_segment_is_active(nilfs, segnum + i + j))
+			if (nilfs_segment_is_active(nilfs, segnum + j))
 				si[i + j].sui_flags |=
 					(1UL << NILFS_SEGMENT_USAGE_ACTIVE);
 		}
-- 
1.5.6.5

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