Re: [PATCH v2 3/4] f2fs: atomic: fix to truncate pagecache before on-disk metadata truncation

From: Jaegeuk Kim
Date: Mon Jul 29 2024 - 12:33:32 EST


On 07/26, Chao Yu wrote:
> We should always truncate pagecache while truncating on-disk data.
>
> Fixes: a46bebd502fe ("f2fs: synchronize atomic write aborts")
> Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
> ---
> v2:
> - fix to use cow_inode instead of inode
> fs/f2fs/file.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 6c62f76474d1..54886ddcb8ab 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -2202,6 +2202,7 @@ static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)
> F2FS_I(fi->cow_inode)->atomic_inode = inode;
> } else {
> /* Reuse the already created COW inode */
> + truncate_setsize(fi->cow_inode, 0);

What if the below truncation failed?

> ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
> if (ret) {
> f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
> --
> 2.40.1