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NAME | SYNOPSIS | DESCRIPTION | KERNEL COMMAND LINE | SEE ALSO | COLOPHON |
SYSTEMD-VERITYSETUP-GENERATOR(8)veritysetup-generatorERITYSETUP-GENERATOR(8)
systemd-veritysetup-generator - Unit generator for integrity
protected block devices
/usr/lib/systemd/system-generators/systemd-veritysetup-generator
systemd-veritysetup-generator is a generator that translates kernel
command line options configuring integrity-protected block devices
(verity) into native systemd units early at boot and when
configuration of the system manager is reloaded. This will create
systemd-veritysetup@.service(8) units as necessary.
Currently, only a single verity device may be set up with this
generator, backing the root file system of the OS.
systemd-veritysetup-generator implements systemd.generator(7).
systemd-veritysetup-generator understands the following kernel
command line parameters:
systemd.verity=, rd.systemd.verity=
Takes a boolean argument. Defaults to "yes". If "no", disables
the generator entirely. rd.systemd.verity= is honored only by
the initial RAM disk (initrd) while systemd.verity= is honored by
both the host system and the initrd.
roothash=
Takes a root hash value for the root file system. Expects a hash
value formatted in hexadecimal characters of the appropriate
length (i.e. most likely 256 bit/64 characters, or longer). If
not specified via systemd.verity_root_data= and
systemd.verity_root_hash=, the hash and data devices to use are
automatically derived from the specified hash value.
Specifically, the data partition device is looked for under a GPT
partition UUID derived from the first 128bit of the root hash,
the hash partition device is looked for under a GPT partition
UUID derived from the last 128bit of the root hash. Hence it is
usually sufficient to specify the root hash to boot from an
integrity protected root file system, as device paths are
automatically determined from it — as long as the partition table
is properly set up.
systemd.verity_root_data=, systemd.verity_root_hash=
These two settings take block device paths as arguments and may
be used to explicitly configure the data partition and hash
partition to use for setting up the integrity protection for the
root file system. If not specified, these paths are automatically
derived from the roothash= argument (see above).
systemd(1), systemd-veritysetup@.service(8), veritysetup(8),
systemd-fstab-generator(8)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2020-08-13. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2020-08-11.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
systemd 246 SYSTEMD-VERITYSETUP-GENERATOR(8)
Pages that refer to this page: 30-systemd-environment-d-generator(7) , kernel-command-line(7) , systemd.directives(7) , systemd.index(7) , systemd-veritysetup(8) , systemd-veritysetup.service(8) , systemd-veritysetup@.service(8)