linux-ext4 - [PATCH v2 2/2] ext4: disable COLLAPSE

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Message-id: <000d01cf5b8b$5b149110$113db330$@samsung.com>
Date:	Sat, 19 Apr 2014 13:53:50 +0900
From:	Namjae Jeon <namjae.jeon@...sung.com>
To:	Theodore Ts'o <tytso@....edu>
Cc:	linux-ext4 <linux-ext4@...r.kernel.org>,
	Lukáš Czerner <lczerner@...hat.com>
Subject: [PATCH v2 2/2] ext4: disable COLLAPSE_RANGE for bigalloc

From: Namjae Jeon <namjae.jeon@...sung.com>

Once COLLAPSE RANGE is be disable for ext4 with bigalloc feature till finding
root-cause of problem. It will be enable with fixing that regression of
xfstest(generic 075 and 091) again.

Signed-off-by: Namjae Jeon <namjae.jeon@...sung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@...sung.com>
Reviewed-by: Lukas Czerner <lczerner@...hat.com>
---
 fs/ext4/extents.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 4cf8c5b..3276865 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -5406,6 +5406,9 @@ int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
 	if (!S_ISREG(inode->i_mode))
 		return -EINVAL;
 
+	if (EXT4_SB(inode->i_sb)->s_cluster_ratio > 1)
+		return -EOPNOTSUPP;
+
 	trace_ext4_collapse_range(inode, offset, len);
 
 	punch_start = offset >> EXT4_BLOCK_SIZE_BITS(sb);
-- 
1.7.11-rc0

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