Hi.
Several years ago I configured extFS by “**Extroot configuration” manual.
Today, after hard reboot my router (tplink-WDR4300), I lost /etc/config/sshtunnel file.
root@OpenWrt:/etc/config# ls -l sshtunnel
ls: sshtunnel: Invalid argument
root@OpenWrt:/etc/config# ls -l
ls: ./sshtunnel: Invalid argument
-rw------- 1 root root 1008 Jul 15 2024 dhcp
-rw------- 1 root root 134 Jul 15 2024 dropbear
-rw-r--r-- 1 root root 475 Aug 15 2025 firewall
-rw-r--r-- 1 root root 439 Sep 11 2024 fstab
-rw-r--r-- 1 root root 968 Jul 15 2024 luci
-rw------- 1 root root 965 Sep 11 2024 network
-rw------- 1 root root 167 Jul 15 2024 rpcd
-rw------- 1 root root 357 Jul 15 2024 system
-rw-r--r-- 1 root root 0 Jul 15 2024 ubootenv
-rw-r--r-- 1 root root 788 Jul 15 2024 ucitrack
-rw------- 1 root root 783 Jul 15 2024 uhttpd
-rw-r--r-- 1 root root 747 Apr 24 09:27 wireless
root@OpenWrt:/etc/config# touch sshtunnel
touch: sshtunnel: Invalid argument
root@OpenWrt:/etc/config# ls -l sshtunnel
ls: sshtunnel: Invalid argument
root@OpenWrt:/etc/config# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 1 1.9G 0 disk
└─sda1 8:1 1 1.9G 0 part /tmp/extroot/overlay
/overlay
mtdblock0 31:0 0 128K 1 disk
mtdblock1 31:1 0 7.8M 0 disk
mtdblock2 31:2 0 2.2M 1 disk
mtdblock3 31:3 0 5.6M 1 disk /rom
mtdblock4 31:4 0 2M 0 disk /rwm
mtdblock5 31:5 0 64K 1 disk
How to repair f2fs filesystem, to findout /etc/config/sshtunnel or recreate it?
root@OpenWrt:/etc/config# dmesg | tail -20
[ 64.222443] br-lan: port 2(phy1-ap0) entered blocking state
[ 64.228254] br-lan: port 2(phy1-ap0) entered disabled state
[ 64.234293] device phy1-ap0 entered promiscuous mode
[ 64.779540] IPv6: ADDRCONF(NETDEV_CHANGE): phy1-ap0: link becomes ready
[ 64.786538] br-lan: port 2(phy1-ap0) entered blocking state
[ 64.792210] br-lan: port 2(phy1-ap0) entered forwarding state
[ 66.750092] br-lan: port 3(phy0-ap0) entered blocking state
[ 66.755871] br-lan: port 3(phy0-ap0) entered disabled state
[ 66.762379] device phy0-ap0 entered promiscuous mode
[ 67.423952] IPv6: ADDRCONF(NETDEV_CHANGE): phy0-ap0: link becomes ready
[ 67.431024] br-lan: port 3(phy0-ap0) entered blocking state
[ 67.436789] br-lan: port 3(phy0-ap0) entered forwarding state
[ 74.501219] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]
[ 79.958710] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]
[ 789.849497] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]
[ 789.865203] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]
[ 790.231201] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]
[ 1205.872220] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]
[ 1213.557336] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]
[ 1216.435453] F2FS-fs (sda1): inconsistent node block, nid:77, node_footer[nid:943,ino:943,ofs:0,cpver:7001075660830728450,blkaddr:11194]