From 0cc37c2df4fa0aa702f9662edce4b7ce12c86b7a Mon Sep 17 00:00:00 2001 From: Sami Tolvanen Date: Thu, 3 Dec 2015 14:26:31 +0000 Subject: dm verity: add ignore_zero_blocks feature If ignore_zero_blocks is enabled dm-verity will return zeroes for blocks matching a zero hash without validating the content. Signed-off-by: Sami Tolvanen Signed-off-by: Mike Snitzer --- Documentation/device-mapper/verity.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/device-mapper') diff --git a/Documentation/device-mapper/verity.txt b/Documentation/device-mapper/verity.txt index d602c801ff59..89fd8f9a259f 100644 --- a/Documentation/device-mapper/verity.txt +++ b/Documentation/device-mapper/verity.txt @@ -79,6 +79,11 @@ restart_on_corruption not compatible with ignore_corruption and requires user space support to avoid restart loops. +ignore_zero_blocks + Do not verify blocks that are expected to contain zeroes and always return + zeroes instead. This may be useful if the partition contains unused blocks + that are not guaranteed to contain zeroes. + use_fec_from_device Use forward error correction (FEC) to recover from corruption if hash verification fails. Use encoding data from the specified device. This -- cgit v1.2.3-70-g09d2