On 10/29/2012 10:55 PM, Dimax wrote:
I remember I have unbricked sheevaplug with USB key. But I'm still not sure if effort is not useless as I see no conclusion about u-boot ability to recover UBIFS partition (at least to try). Can anybody tell it for sure?
This is what I've got from the code [1].
Code flow --------- common/cmd_ubifs.c: do_ubifs_mount calls ubifs_mount
fs/ubifs/super.c, In ubifs_mount() (line 1167) flags = MS_RDONLY; (line 1188) calls ubifs_get_sb (with flags as a param) ubifs_get_sb (line 1018) The flags get updated here. sb->s_flags = flags; (line 1057)
Calls ubifs_fill_super sb gets assigned, so are the flags. c->vfs_sb = sb; (line 962)
Calls mount_ubifs mount_ubifs(c); (line 983)
In mount_ubifs() (line 582)
struct super_block *sb = c->vfs_sb; int err, mounted_read_only = (sb->s_flags & MS_RDONLY);
sb taken from the assigned ptr @ line 962. Flags extracted from the assigned flags @ 1188. Just see where the variable 'mounter_read_only' gets referred and you'll get the answer. U-boot will _not_ recover your UBIFS partition like the Linux kernel. CMIIW.
[1] http://git.denx.de/?p=u-boot.git;a=tree;h=5bb3505fa867ded03cbee83f7722ab5182...
Hope this helps, Vikram