On Thu, Sep 14, 2017 at 11:50:46AM +0200, Andreas Gruenbacher wrote:
> +int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap)
> +{
> + __u64 addr;
> + int error = -EAGAIN;
> + struct ext4_iloc iloc;
> +
> + down_read(&EXT4_I(inode)->xattr_sem);
> + if (!ext4_has_inline_data(inode))
> + goto out;
....
> +out:
> + up_read(&EXT4_I(inode)->xattr_sem);
> + return error;
> +}
If we race with the inline data flag getting cleared,
ext4_iomap_begin() will return with -EAGAIN. As near as I can tell,
this will get reflected all the way up to userspace, instead of having
the retry happen in the kernel. Is this intentional?
It looks like a user visible change, no?
- Ted
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