Re: kern/59761: dmsetup broken in 10.1 with default GENERIC kernel

["Mike Edwards via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/59761; it has been noted by GNATS.

From: Mike Edwards <mike%mobile.mirkwood.net@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
	medwards-netbsd%mirkwood.net@localhost
Subject: Re: kern/59761: dmsetup broken in 10.1 with default GENERIC kernel
Date: Mon, 17 Nov 2025 08:56:43 -0500

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 So, we effectively have two bugs here: dmsetup prints garbage, and ext2fs
 does nothing with rdev.
 
 What's the next step - create two new bugs and close this one?
 
 Thanks for your help in tracking these down!
 
 On Sun, Nov 16, 2025, 20:15 Michael van Elst via gnats <
 gnats-admin%netbsd.org@localhost> wrote:
 
 > The following reply was made to PR kern/59761; it has been noted by GNATS.
 >
 > From: mlelstv%serpens.de@localhost (Michael van Elst)
 > To: gnats-bugs%netbsd.org@localhost
 > Cc:
 > Subject: Re: kern/59761: dmsetup broken in 10.1 with default GENERIC kernel
 > Date: Mon, 17 Nov 2025 01:11:12 -0000 (UTC)
 >
 >  gnats-admin%NetBSD.org@localhost ("Mike Edwards via gnats") writes:
 >
 >  > Perhaps unusually, I'm using ext2fs here, as it makes it easier to
 >  > mount the vm on the host if needed (Xen dom0 is currently Linux).
 >
 >
 >  Looks like ext2fs does not initialize the rdev field for anything.
 >
 >  -rw-r--r--  1 root  wheel      0 Nov 17 02:08 foo
 >  crw-r--r--  1 root  wheel   0, 0 Nov 17 02:09 bar
 >
 >  % stat -s foo
 >  st_dev=4864 st_ino=12 st_mode=0100644 st_nlink=1 st_uid=0 st_gid=0
 > st_rdev=0 st_size=0 st_atime=1763341722 st_mtime=1763341722
 > st_ctime=1763341722 st_birthtime=0 st_blksize=1024 st_blocks=0 st_flags=0
 >
 >  % stat -s bar
 >  st_dev=4864 st_ino=13 st_mode=020644 st_nlink=1 st_uid=0 st_gid=0
 > st_rdev=0 st_size=0 st_atime=1763341746 st_mtime=1763341746
 > st_ctime=1763341746 st_birthtime=0 st_blksize=65536 st_blocks=0 st_flags=0
 >
 >
 >
 
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 <div dir=3D"auto">So, we effectively have two bugs here: dmsetup prints gar=
 bage, and ext2fs does nothing with rdev.<div dir=3D"auto"><br></div><div di=
 r=3D"auto">What&#39;s the next step - create two new bugs and close this on=
 e?=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Thanks for your=
  help in tracking these down!</div></div><br><div class=3D"gmail_quote gmai=
 l_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Nov 16, 20=
 25, 20:15 Michael van Elst via gnats &lt;<a href=3D"mailto:gnats-admin@netb=
 sd.org">gnats-admin%netbsd.org@localhost</a>&gt; wrote:<br></div><blockquote class=3D=
 "gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
 -left:1ex">The following reply was made to PR kern/59761; it has been noted=
  by GNATS.<br>
 <br>
 From: <a href=3D"mailto:mlelstv%serpens.de@localhost"; target=3D"_blank" rel=3D"norefe=
 rrer">mlelstv%serpens.de@localhost</a> (Michael van Elst)<br>
 To: <a href=3D"mailto:gnats-bugs%netbsd.org@localhost"; target=3D"_blank" rel=3D"noref=
 errer">gnats-bugs%netbsd.org@localhost</a><br>
 Cc: <br>
 Subject: Re: kern/59761: dmsetup broken in 10.1 with default GENERIC kernel=
 <br>
 Date: Mon, 17 Nov 2025 01:11:12 -0000 (UTC)<br>
 <br>
 =C2=A0gnats-admin%NetBSD.org@localhost (&quot;Mike Edwards via gnats&quot;) writes:<b=
 r>
 <br>
 =C2=A0&gt; Perhaps unusually, I&#39;m using ext2fs here, as it makes it eas=
 ier to<br>
 =C2=A0&gt; mount the vm on the host if needed (Xen dom0 is currently Linux)=
 .<br>
 <br>
 <br>
 =C2=A0Looks like ext2fs does not initialize the rdev field for anything.<br=
 >
 <br>
 =C2=A0-rw-r--r--=C2=A0 1 root=C2=A0 wheel=C2=A0 =C2=A0 =C2=A0 0 Nov 17 02:0=
 8 foo<br>
 =C2=A0crw-r--r--=C2=A0 1 root=C2=A0 wheel=C2=A0 =C2=A00, 0 Nov 17 02:09 bar=
 <br>
 <br>
 =C2=A0% stat -s foo<br>
 =C2=A0st_dev=3D4864 st_ino=3D12 st_mode=3D0100644 st_nlink=3D1 st_uid=3D0 s=
 t_gid=3D0 st_rdev=3D0 st_size=3D0 st_atime=3D1763341722 st_mtime=3D17633417=
 22 st_ctime=3D1763341722 st_birthtime=3D0 st_blksize=3D1024 st_blocks=3D0 s=
 t_flags=3D0<br>
 <br>
 =C2=A0% stat -s bar<br>
 =C2=A0st_dev=3D4864 st_ino=3D13 st_mode=3D020644 st_nlink=3D1 st_uid=3D0 st=
 _gid=3D0 st_rdev=3D0 st_size=3D0 st_atime=3D1763341746 st_mtime=3D176334174=
 6 st_ctime=3D1763341746 st_birthtime=3D0 st_blksize=3D65536 st_blocks=3D0 s=
 t_flags=3D0<br>
 <br>
 <br>
 </blockquote></div>
 
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