2011-12-31 05:17:10

by Yongqiang Yang

[permalink] [raw]
Subject: [PATCH] ext4: teach ext4_free_blocks to handle multi journalled data blocks

This patch makes ext4_free_blocks work well with multi journaled data blocks.
Consider that journal mode of a file is changed from ordered mode to
jounral mode, then ext4_free_blocks() should record data blocks in revoke table.
ext4 with journal mode also needs ext4_free_blocks() to record data blocks
in revoke table.

Signed-off-by: Yongqiang Yang <[email protected]>
---
fs/ext4/mballoc.c | 8 +++-----
1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index cb990b2..46f5a24 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4562,19 +4562,17 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
trace_ext4_free_blocks(inode, block, count, flags);

if (flags & EXT4_FREE_BLOCKS_FORGET) {
- struct buffer_head *tbh = bh;
int i;

BUG_ON(bh && (count > 1));

for (i = 0; i < count; i++) {
if (!bh)
- tbh = sb_find_get_block(inode->i_sb,
+ bh = sb_find_get_block(inode->i_sb,
block + i);
- if (unlikely(!tbh))
- continue;
ext4_forget(handle, flags & EXT4_FREE_BLOCKS_METADATA,
- inode, tbh, block + i);
+ inode, bh, block + i);
+ bh = NULL;
}
}

--
1.7.5.1