On Sat, Mar 17, 2012 at 10:58:05AM +1100, James Cameron wrote:
> On Fri, Mar 16, 2012 at 11:58:51AM -0600, Daniel Drake wrote:
> In OpenFirmware, we might either:
>
> * do the resize only if the .zd file requests it, (a new ''resize:''
> line after ''zblocks-end:''), or
This has been written and tested locally. The patch is attached for
review.
> Adding resize: to the end of an .zd file does not cause any error on the
> current version of OpenFirmware on XO-1.75, so it can be added now:
I was wrong about this ... in that the zblocks-end: causes the file to
be closed, so the resize: won't be seen in that position. If it is added
above the zblocks-end: a warning occurs, but the fs-update does complete.
Attached is a revised patch, which places the resize: before
zblocks-end: with a wrapper to prevent warning. This allows the resize:
request to be added to olpc-os-builder without requiring OpenFirmware
support.
--
James Cameron
http://quozl.linux.org.au/
Index: cpu/x86/pc/olpc/via/fsupdate.fth
===================================================================
--- cpu/x86/pc/olpc/via/fsupdate.fth (revision 2889)
+++ cpu/x86/pc/olpc/via/fsupdate.fth (working copy)
@@ -63,6 +63,7 @@
then
;
+false value fs-update-resize?
vocabulary nand-commands
also nand-commands definitions
@@ -93,6 +94,47 @@
fexit
;
+h# 1be. 2value pt \ device byte offset to start of partition table
+h# 10 value /pe \ size of a partition entry
+/pe buffer: pe \ partition entry buffer
+
+: pe-seek ( n -- )
+ 1- /pe * 0 pt d+ ( d.pos )
+ " seek" nandih $call-method drop ( )
+;
+
+: pe-read ( n -- ) pe-seek pe /pe " read" nandih $call-method drop ;
+: pe-write ( n -- ) pe-seek pe /pe " write" nandih $call-method drop ;
+
+: pe-start@ ( pe -- start ) pe h# 08 + le-l@ ;
+: pe-length@ ( pe -- length ) pe h# 0c + le-l@ ;
+: pe-length! ( length pe -- ) pe h# 0c + le-l! ;
+
+: pe-is-set? ( pe# -- flag ) pe-read pe-start@ pe-length@ or ;
+
+: (resize:) ( -- )
+ 4 pe-is-set? abort" partition 4 is non-zero"
+ 3 pe-is-set? abort" partition 3 is non-zero"
+ " size" nandih $call-method d# 512 um/mod swap drop
+ ( d-end )
+ 2 pe-read ( d-end )
+ pe-start@ dup >r ( d-end p-start ) ( r: p-start )
+ pe-length@ + swap ( p-end d-end ) ( r: p-start )
+ 2dup > abort" partition ends beyond device size"
+ 2dup < if ( p-end d-end ) ( r: p-start )
+ nip r> - pe-length! ( ) ( r: )
+ 2 pe-write ( ) ( r: )
+ else ( p-end d-end ) ( r: p-start )
+ r> 3drop ( ) ( r: )
+ then ( ) ( r: )
+;
+
+: resize: ( -- )
+ " write-blocks-end" $call-nand ( error? )
+ " Write error" ?nand-abort
+ fs-update-resize? if (resize:) then
+;
+
: data: ( "filename" -- )
safe-parse-word ( filename$ )
nb-zd-#sectors -1 <> if ( filename$ )
@@ -240,9 +282,21 @@
;
: fs-update ( "devspec" -- )
+ true to fs-update-resize?
safe-parse-word $fs-update
;
+: fs-update-no-resize ( "devspec" -- )
+ false to fs-update-resize?
+ safe-parse-word $fs-update
+;
+
+: fs-resize ( -- )
+ open-nand
+ [ also nand-commands ] (resize:) [ previous ]
+ close-nand
+;
+
: do-fs-update ( img$ -- )
tuck load-base h# c00000 + swap move ( len )
load-base h# c00000 + swap ( adr len )
>From 778c97e83522c8e6c62e0aa0a4f2413d765c9d13 Mon Sep 17 00:00:00 2001
From: James Cameron <qu...@laptop.org>
Date: Sat, 17 Mar 2012 13:51:27 +1100
Subject: [PATCH] root partition resize after fs-update, #11690
Direct OpenFirmware to resize the root partition just before the end of
the file. OpenFirmware is to ignore this if fs-update-no-resize is used.
---
bin/zhashfs.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/bin/zhashfs.c b/bin/zhashfs.c
index dd712ae..eb49549 100644
--- a/bin/zhashfs.c
+++ b/bin/zhashfs.c
@@ -158,6 +158,11 @@ static void read_extents(FILE *infile)
process_extent(&fiemap->fm_extents[i]);
}
+void write_end(FILE *file) {
+ LTC_ARGCHK(fputs("[ifdef] resize: resize: [then]\n", file) >= 0);
+ LTC_ARGCHK(fputs("zblocks-end:\n", file) >= 0);
+}
+
int main(int argc, char **argv)
{
char *fname;
@@ -259,8 +264,8 @@ int main(int argc, char **argv)
LTC_ARGCHK(readlen == zblocksize);
write_block(0, buf);
- fprintf(outfile, "zblocks-end:\n");
- fprintf(zfile, "zblocks-end:\n");
+ write_end(outfile);
+ write_end(zfile);
fclose(infile);
fclose(outfile);
--
1.7.9.1
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