On Thu, Sep 9, 2021 at 2:31 PM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Tue, Sep 07, 2021 at 08:14:25PM +0800, Xie Yongji wrote: > > When a nbd device encounters a writeback error, that error will > > get propagated to the bd_inode's wb_err field. Then if this nbd > > device's backend is disconnected and another is attached, we will > > get back the previous writeback error on fsync, which is unexpected. > > To fix it, let's clear out the wb_err on disconnect. > > I really do not like how internals of the implementation like into > drivers here. Can you add a block layer helper to clear any state > instead? This should incude e.g. the size just cleared above and should > also be used by the loop driver as well. Sure, will do it. Thanks, Yongji
