On 2022/9/13 11:05, Zhang Qilong wrote:
If we do not truncate source page cache, user can still
see the previous source data after being moved. We fix
it by adding truncating after __exchange_data_block.
Fixes:4dd6f977fc778 ("f2fs: support an ioctl to move a range of data blocks")
Signed-off-by: Zhang Qilong <zhangqilo...@huawei.com>
---
fs/f2fs/file.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 771f1f7f3690..e3ff648aa496 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2789,6 +2789,10 @@ static int f2fs_move_file_range(struct file *file_in,
loff_t pos_in,
}
f2fs_unlock_op(sbi);
+ filemap_invalidate_lock(src->i_mapping);
invalidate lock should cover __exchange_data_block()?
+ truncate_pagecache_range(src, pos_in, pos_in + len - 1);
truncate_pagecache_range() should be called before __exchange_data_block()?
Thanks,
+ filemap_invalidate_unlock(src->i_mapping);
+
if (src != dst)
f2fs_up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);
out_src:
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