Hi Tom,
On Tue, 12 Oct 2021 at 15:07, Tom Rini trini@konsulko.com wrote:
On Tue, Oct 12, 2021 at 02:31:18PM -0600, Simon Glass wrote:
Hi Tom,
On Tue, 12 Oct 2021 at 13:44, Tom Rini trini@konsulko.com wrote:
On Tue, Oct 12, 2021 at 04:55:44PM +0800, Artem Lapkin wrote:
Problem
PXE cannot boot normally after Sysboot changed the bootfile env (called from boot_extlinux) from the default "boot.scr.uimg" to "/boot/extlinux/extlinux.conf".
In addition, an unbootable extlinux configuration will also make the PXE boot unbootable, because it will use the incorrect path "/boot/extlinux/" from the bootfile env.
Solution
Save and restore default bootfile env value when boot_extlinux is used.
Example
Hit SPACE in 2 seconds to stop autoboot ... is now current device Found /boot/extlinux/extlinux.conf Retrieving file: /boot/extlinux/extlinux.conf 413 bytes read in 2 ms (201.2 KiB/s) Skipping Krescue for failure retrieving kernel SCRIPT FAILED: continuing... ... Speed: 1000, full duplex BOOTP broadcast 1 DHCP client bound to address 192.168.11.151 (8 ms) Using ethernet@ff3f0000 device TFTP from server 192.168.11.1; our IP address is 192.168.11.151 Filename '/boot/extlinux/pxelinux.cfg/default'. Not retrying... ================================================================
Signed-off-by: Artem Lapkin art@khadas.com
include/config_distro_bootcmd.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h index 3f724aa10f..db3d1b2362 100644 --- a/include/config_distro_bootcmd.h +++ b/include/config_distro_bootcmd.h @@ -445,7 +445,9 @@ "${devnum}:${distro_bootpart} " \ "${prefix}${boot_syslinux_conf}; then " \ "echo Found ${prefix}${boot_syslinux_conf}; " \
"bootfile_bak=${bootfile}; " \ "run boot_extlinux; " \"setenv bootfile ${bootfile_bak}; " \ "echo SCRIPT FAILED: continuing...; " \ "fi\0" \ \We've had this kind of problem before, and the answer is that variables should be local, not global in scope. In this case, I see that the way the pxe/sysboot code works is that we have to env_set("..") in one place to env_get("..") in another, so I don't see a way around this.
Reviewed-by: Tom Rini trini@konsulko.com
IMO a better approach will be the bootflow implementation. I hope to get v2 out early next week.
I'm not sure if the bootflow way of going here would or would not have the same problem, or perhaps a slightly different problem. At heart here, "sysboot" calls env_set(...) and then calls in to the pxe code which does env_get(...). So now I wonder how this would be fixed in bootflow, since we aren't dealing with the environment directly.
Here's the patch where (I believe) this problem was addressed:
http://patchwork.ozlabs.org/project/uboot/patch/20210927092350.v2.11.I6a01e7...
Regards, Simon