When firmware is new flashed and reboot with a storage device plug in its usb
interface. Though the filesystem is not ready (FS_STATE_UNKNOWN), the
/dev/sda1 still mount on /mnt/sda1 by block-mount, then the system switching
jffs...
root@OpenWrt:~# dmesg
......
[ 32.224522] jffs2_scan_eraseblock(): End of filesystem marker found at 0x0
[ 32.270514] jffs2_build_filesystem(): unlocking the mtd device...
[ 32.278711] jffs2_build_filesystem(): erasing all blocks after the end
marker...
root@OpenWrt:~# mount
......
/dev/sda1 on /mnt/sda1 type exfat
(rw,relatime,fmask=0000,dmask=0000,allow_utime=0022,iocharset=utf8,namecase=0,errors=remount-ro)
mountd(pid1314) on /tmp/run/blockd type autofs
(rw,relatime,fd=7,pgrp=1,timeout=30,minproto=5,maxproto=5,indirect)
After few miniutes, when filesystem is ready (FS_STATE_READY,
/overlay/.fs_state -> 2)
the /dev/sda1 lost its mount point
root@OpenWrt:~# dmesg
...
[ 207.439407] jffs2: notice: (1336) jffs2_build_xattr_subsystem: complete
building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0
dead, 0 orphan) found.
root@OpenWrt:~# mount
......
**no /mnt/sda1 found**
......
Signed-off-by: Rosy Song <rosys...@rosinson.com>
---
mount_root.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/mount_root.c b/mount_root.c
index dffb0a6..110e4fd 100644
--- a/mount_root.c
+++ b/mount_root.c
@@ -101,6 +101,7 @@ stop(int argc, char *argv[1])
static int
done(int argc, char *argv[1])
{
+ int ret;
struct volume *v = volume_find("rootfs_data");
if (!v)
@@ -109,7 +110,15 @@ done(int argc, char *argv[1])
switch (volume_identify(v)) {
case FS_NONE:
case FS_DEADCODE:
- return jffs2_switch(v);
+ ret = jffs2_switch(v);
+ /*
+ * Devices mounted under /mnt will lost their mount point(see
switch2jffs())
+ * if the filesystem's(/overlay) state is not FS_STATE_READY,
+ * this action can fix it.
+ */
+ if (!access("/sbin/block", X_OK))
+ system("/sbin/block mount");
+ return ret;
case FS_EXT4:
case FS_F2FS:
--
2.13.3
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