[linux-lvm] resend patch - bcache may mistakenly write data to another disk when writes error

[David Teigland]

On Wed, Nov 13, 2019 at 02:23:42AM +0000, Heming Zhao wrote:
> label_write // @ lib/label/label.c
>   +-> dev_write_bytes //
>   |    +-> if (!bcache_flush()) //when failed, call below invalidate
>   |          label_scan_invalidate // will set fd=-1 in _scan_dev_close()
>   +-> dev_unset_last_byte // with fd: -1
>       +-> bcache_unset_last_byte
>             +-> _last_byte_fd != fd(-1), the _last_byte_xx never clean.
> ```
> So all bcache_unset_last_byte which after dev_write_bytes should be modified.
> For detail code fix, please check my V2 patch which I sent on Oct 28th.

Got it, thanks for your work on that, please check I got all the necessary
lines from your patch.

https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=13c254fc05386d05ab6bbda2806f9ca4d3358a0c

> Would you have any plan/schedule to backport bcache bug fixes to stable-2.02 branch?

I'll try to apply them all today.