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Subject: more ?? on ext2FS
Date: Thu, 25 Oct 2007 14:02:12 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E06383637@onstor-exch02.onstor.net>
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Thread-Topic: more ?? on ext2FS
Thread-Index: AcgXUrIvN7sB7A4YTxmY6+dnPVlDXA==
From: "Warren Gale" <warren.gale@onstor.com>
To: "Andy Sharp" <andy.sharp@onstor.com>

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Andy,

  It seems that I've hit the wall (again) going through the code for the
Ext2FS.

I see the upper layer and I am now stuck trying to get an "io_manager"
set up to at least look similar to
what I see in BSD UFS.

=20

I think I'm missing some intermediate code some where.
I can rip out structures like "disklabel" that are embedded in the
control structures that
go to functions like "disk_read_block(dsc, dsc->position / 512, readptr,
512);"
 which go all the way down to setting registers values, but this doesn't
look feasible.
If done this way,  no-one (even myself) would be able to follow it or
maintain it.

=20

So Anyway enough of my stuff.. I heard that you have some thing that
actually write and reads to CF?

Would you mind sharing?

=20

There's got to be something I can use that's way way better that what
I've got.

 Is there some thing in  say
depot/dev/linux/kernel/linux-mips-2.6/arch/mips ??

=20

Thanks,

Warren

=20

=20


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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Andy,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>&nbsp; It seems that I&#8217;ve hit the wall (again) =
going
through the code for the Ext2FS.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I see the upper layer and I am now stuck trying to =
get an &#8220;io_manager&#8221;
set up to at least look similar to<br>
what I see in BSD UFS.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I think I&#8217;m missing some intermediate code some =
where.<br>
I can rip out structures like &#8220;disklabel&#8221; that are embedded =
in the
control structures that<br>
go to functions like &#8220;disk_read_block(dsc, dsc-&gt;position / 512,
readptr, 512);&#8221;<br>
&nbsp;which go all the way down to setting registers values, but this =
doesn&#8217;t
look feasible.<br>
If done this way, &nbsp;no-one (even myself) would be able to follow it =
or maintain
it.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>So Anyway enough of my stuff.. I heard that you have =
some
thing that actually write and reads to CF?<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Would you mind sharing?<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>There&#8217;s got to be something I can use =
that&#8217;s way
way better that what I&#8217;ve got.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>&nbsp;Is there some thing in&nbsp; say =
&nbsp;</span></font><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:9.5pt;font-family:"Times New =
Roman";color:black'>depot</span></font></b></span><span
class=3Dbigger><b><font size=3D2 color=3Dblack face=3DVerdana><span =
style=3D'font-size:
9.5pt;font-family:Verdana;color:black;font-weight:bold'>/</span></font></=
b></span><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:9.5pt;font-family:"Times New =
Roman";color:black'>dev</span></font></b></span><span
class=3Dbigger><b><font size=3D2 color=3Dblack face=3DVerdana><span =
style=3D'font-size:
9.5pt;font-family:Verdana;color:black;font-weight:bold'>/</span></font></=
b></span><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:9.5pt;font-family:"Times New =
Roman";color:black'>linux</span></font></b></span><span
class=3Dbigger><b><font size=3D2 color=3Dblack face=3DVerdana><span =
style=3D'font-size:
9.5pt;font-family:Verdana;color:black;font-weight:bold'>/</span></font></=
b></span><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:9.5pt;font-family:"Times New =
Roman";color:black'>kernel</span></font></b></span><span
class=3Dbigger><b><font size=3D2 color=3Dblack face=3DVerdana><span =
style=3D'font-size:
9.5pt;font-family:Verdana;color:black;font-weight:bold'>/</span></font></=
b></span><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:9.5pt;font-family:"Times New =
Roman";color:black'>linux-mips-2.6</span></font></b></span><span
class=3Dbigger><b><font size=3D2 color=3Dblack face=3DVerdana><span =
style=3D'font-size:
9.5pt;font-family:Verdana;color:black;font-weight:bold'>/</span></font></=
b></span><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:9.5pt;font-family:"Times New =
Roman";color:black'>arch</span></font></b></span><span
class=3Dbigger><b><font size=3D2 color=3Dblack face=3DVerdana><span =
style=3D'font-size:
9.5pt;font-family:Verdana;color:black;font-weight:bold'>/</span></font></=
b></span><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:9.5pt;font-family:"Times New Roman";color:black'>mips =
??<o:p></o:p></span></font></b></span></p>

<p class=3DMsoNormal><span class=3Dpath1><b><font size=3D2 color=3Dblack =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black;font-weight:norma=
l'><o:p>&nbsp;</o:p></span></font></b></span></p>

<p class=3DMsoNormal><span class=3Dpath1><b><font size=3D2 color=3Dblack =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black;font-weight:norma=
l'>Thanks,<o:p></o:p></span></font></b></span></p>

<p class=3DMsoNormal><st1:City w:st=3D"on"><st1:place w:st=3D"on"><span =
class=3Dpath1><b><font
  size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
  =
color:black;font-weight:normal'>Warren</span></font></b></span></st1:plac=
e></st1:City><span
class=3Dpath1><b><font size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;color:black;font-weight:normal'><o:p></o:p></span></fon=
t></b></span></p>

<p class=3DMsoNormal><span class=3Dpath1><b><font size=3D2 color=3Dblack
face=3D"Times New Roman"><span =
style=3D'font-size:9.5pt;font-family:"Times New Roman";
color:black'><o:p>&nbsp;</o:p></span></font></b></span></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

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