[dm-devel] [PATCH] dm-verity: Add error handling modes for corrupted blocks

[Sami Tolvanen]

On Tue, Mar 17, 2015 at 11:27:49AM -0400, Vivek Goyal wrote:
> What's the idea behind kernel restart mode ? If a corrupted block is in
> the path of boot, will we not get into a continuous reboot cycle.

It depends on how dm-verity is used. If we have PSTORE_CONSOLE enabled, for
example, after a restart we can check if the restart was caused by dm-verity
and then use a different mode when setting up the verity device. Most likely
for some systems this is not a reasonable recovery method, but we find it to
be useful on Android at least.

Sami