#19443: Extroot pivot overlay not working on WRT1900AC due to bug in fstools
-----------------------------+------------------------
Reporter: gerein | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone:
Component: packages | Version: Trunk
Keywords: fstools extroot |
-----------------------------+------------------------
fstools (in block.c) reads /proc/mtd looking for the string "rootfs" to
find a rootfs partition (in check_extroot() and find_block_mtd() ).
However, my WRT1900AC has a second rootfs ("rootfs2" on mtd7, see output
below), since it keeps the previously flashed image on a separate
partition. The right rootfs is in an ubifs (on mtd5), therefore
check_extroot() finds the second rootfs (stock firmware in my case) first
and gets confused.
{{{
root@OpenWrt:~# cat /proc/mtd
dev: size erasesize name
mtd0: 00100000 00020000 "u-boot"
mtd1: 00040000 00020000 "u_env"
mtd2: 00040000 00020000 "s_env"
mtd3: 00100000 00020000 "devinfo"
mtd4: 02800000 00020000 "kernel1"
mtd5: 02500000 00020000 "ubi"
mtd6: 02800000 00020000 "kernel2"
mtd7: 02500000 00020000 "rootfs2"
mtd8: 02600000 00020000 "syscfg"
mtd9: 00008000 00008000 "spi0.0"
}}}
The following patch fixes the lookup and make extroot work but is probably
not the most clean/complete solution to the problem.
{{{
--- block.c 2015-04-09 12:36:09.000000000 +0100
+++ block-new.c 2015-04-09 14:46:00.000000000 +0100
@@ -969,7 +969,7 @@
char devpath[32];
#ifdef UBIFS_EXTROOT
- if (find_block_mtd("rootfs", devpath, sizeof(devpath))) {
+ if (find_block_mtd("rootfs\"", devpath, sizeof(devpath))) {
int err = -1;
libubi_t libubi;
}}}
--
Ticket URL: <https://dev.openwrt.org/ticket/19443>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
_______________________________________________
openwrt-tickets mailing list
[email protected]
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-tickets
