diff options
Diffstat (limited to 'Documentation/admin-guide/device-mapper/verity.rst')
| -rw-r--r-- | Documentation/admin-guide/device-mapper/verity.rst | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/Documentation/admin-guide/device-mapper/verity.rst b/Documentation/admin-guide/device-mapper/verity.rst index bb02caa45289..a65c1602cb23 100644 --- a/Documentation/admin-guide/device-mapper/verity.rst +++ b/Documentation/admin-guide/device-mapper/verity.rst @@ -69,7 +69,7 @@ Construction Parameters <#opt_params> Number of optional parameters. If there are no optional parameters, - the optional paramaters section can be skipped or #opt_params can be zero. + the optional parameters section can be skipped or #opt_params can be zero. Otherwise #opt_params is the number of following arguments. Example of optional parameters section: @@ -83,6 +83,10 @@ restart_on_corruption not compatible with ignore_corruption and requires user space support to avoid restart loops. +panic_on_corruption + Panic the device when a corrupted block is discovered. This option is + not compatible with ignore_corruption and restart_on_corruption. + 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 @@ -130,7 +134,16 @@ root_hash_sig_key_desc <key_description> the pkcs7 signature of the roothash. The pkcs7 signature is used to validate the root hash during the creation of the device mapper block device. Verification of roothash depends on the config DM_VERITY_VERIFY_ROOTHASH_SIG - being set in the kernel. + being set in the kernel. The signatures are checked against the builtin + trusted keyring by default, or the secondary trusted keyring if + DM_VERITY_VERIFY_ROOTHASH_SIG_SECONDARY_KEYRING is set. The secondary + trusted keyring includes by default the builtin trusted keyring, and it can + also gain new certificates at run time if they are signed by a certificate + already in the secondary trusted keyring. + +try_verify_in_tasklet + If verity hashes are in cache, verify data blocks in kernel tasklet instead + of workqueue. This option can reduce IO latency. Theory of operation =================== |