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f2fs: fix to truncate inline data in inode page when setattr

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Previous we do not truncate inline data in inode page when setattr, so following
case could still read the inline data which has already truncated:

1.write inline data
2.ftruncate size to 0
3.ftruncate size to max inline data size
4.read from offset 0

This patch introduces truncate_inline_data() to fix this problem.

change log from v1:
 o fix a bug and do not truncate first page data after truncate inline data.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Chao Yu
2014-04-29 09:03:03 +08:00
committed by Jaegeuk Kim
parent 817202d937
commit 8aa6f1c5bd
3 changed files with 22 additions and 0 deletions
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18
fs/f2fs/inline.c
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@@ -176,6 +176,24 @@ int f2fs_write_inline_data(struct inode *inode,
return 0;
}
void truncate_inline_data(struct inode *inode, u64 from)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
struct page *ipage;
if (from >= MAX_INLINE_DATA)
return;
ipage = get_node_page(sbi, inode->i_ino);
if (IS_ERR(ipage))
return;
zero_user_segment(ipage, INLINE_DATA_OFFSET + from,
INLINE_DATA_OFFSET + MAX_INLINE_DATA);
set_page_dirty(ipage);
f2fs_put_page(ipage, 1);
}
int recover_inline_data(struct inode *inode, struct page *npage)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);