I've seen a few posts about how to boot from the WL-700gE's IDE drive or
from a USB drive, but when I tried it on my WL-700gE it failed for the
simple reason that the firmware I built (using the 2.6 kernel) was too
large, so the 128kB left for the jffs2 were insufficient to make
a jffs2 filesystem: OpenWRT gracefully fell back on a ramdisk overlay,
so I could create my disk's partiion, mount it and all, but at the next
reboot, I always cambe back to the default config since nothing had been
saved on flash.
I first tried to squeeze out "unimportant" things in the hope to get
my firmware small enough to get jffs2 up, but in the end I figured:
why bother. So I just directly tweaked the /sbin/mount_root script
(took me a while to figure out that it was the place I wanted to
change) by adding the few lines appended below. This also lets me use
slightly larger firmwares since I don't need any jffs2 at all.
These lines may not be a good default (they'd add about 10s to every
non-USB boot), but maybe we should offer this kind of functionality as
configuration option. WDYT?
On a related note, such firmwares would be better off without any jffs2
compiled into the kernel.
Stefan
Index: mount_root
===================================================================
--- mount_root (révision 11579)
+++ mount_root (copie de travail)
@@ -8,9 +10,56 @@
[ "$magic" != "deadc0de" ]
}
+### Try to mount some drive. ####################
+mount_drive () {
+ for m in jbd ext3; do
+ echo "mount_drive $m" >>/tmp/stef
+ insmod "$m" >>/tmp/stef 2>&1
+ done
+
+ rootdev="$1"
+
+ COUNTER=0
+ while [ ! -b "$rootdev" ] && [ $COUNTER -lt 10 ]; do
+ echo "mount sleep for $rootdev" >>/tmp/stef
+ sleep 1
+ let COUNTER=COUNTER+1
+ done
+
+ mount "$rootdev" /mnt && [ -x /mnt/sbin/init ] && {
+ echo "mounted $rootdev" >>/tmp/stef
+ . /bin/firstboot
+ pivot /mnt /rom
+ exit
+ }
+}
+
+mount_ide () {
+ echo mount_ide >>/tmp/stef
+ for m in ide-core aec62xx ide-generic ide-disk; do
+ insmod "$m" >>/tmp/stef 2>&1
+ done
+ mount_drive "/dev/hde1"
+}
+
+mount_usb () {
+ echo mount_usb >>/tmp/stef
+ for m in usbcore ohci-hcd ehci-hcd scsi_mod sd_mod usb-storage; do
+ echo "mount_usb $m" >>/tmp/stef
+ insmod "$m" >>/tmp/stef 2>&1
+ done
+ mount_drive "/dev/sda1"
+}
+
+mount_usb
+mount_ide
+
+### If no drve, mount the JFFS2 partition or a ramdisk. ####################
grep rootfs_data /proc/mtd >/dev/null 2>/dev/null && {
+ echo mount_root-11 >>/tmp/stef
. /bin/firstboot
mtd unlock rootfs_data
+ echo mount_root-12 >>/tmp/stef
jffs2_ready && {
echo "switching to jffs2"
mount "$(find_mtd_part rootfs_data)" /jffs -t jffs2 && \
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