On 3/18/25 03:08, Daeho Jeong wrote:
> From: Daeho Jeong <daehoje...@google.com>
>
> support a file truncation to zero size for device aliasing files.
>
> Signed-off-by: Daeho Jeong <daehoje...@google.com>
> ---
> fs/f2fs/file.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index f92a9fba9991..7ae5a5af5ed9 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -1036,7 +1036,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry
> *dentry,
>
> if ((attr->ia_valid & ATTR_SIZE)) {
> if (!f2fs_is_compress_backend_ready(inode) ||
> - IS_DEVICE_ALIASING(inode))
> + (IS_DEVICE_ALIASING(inode) && attr->ia_size))
> return -EOPNOTSUPP;
> if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
> !IS_ALIGNED(attr->ia_size,
> @@ -1117,6 +1117,9 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry
> *dentry,
> if (err)
> return err;
Daeho,
If truncate(, 0) failed due to some reasons, maybe, the file was partially
truncated, should we tag it as inconsistent status to avoid its later access?
thoughts?
Thanks,
>
> + if (IS_DEVICE_ALIASING(inode))
> + f2fs_destroy_extent_tree(inode);
> +
> spin_lock(&fi->i_size_lock);
> inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
> fi->last_disk_size = i_size_read(inode);
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