1SYSTEMD-VERITYSETUP-GENERAsTyOsRt(e8m)d-veritysetup-geSnYeSrTaEtMoDr-VERITYSETUP-GENERATOR(8)
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NAME

6       systemd-veritysetup-generator - Unit generator for integrity protected
7       block devices
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SYNOPSIS

10       /usr/lib/systemd/system-generators/systemd-veritysetup-generator
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DESCRIPTION

13       systemd-veritysetup-generator is a generator that translates kernel
14       command line options configuring integrity protected block devices
15       (verity) into native systemd units early at boot and when configuration
16       of the system manager is reloaded. This will create systemd-
17       veritysetup@.service(8) units as necessary.
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19       Currently, only a single verity device may be se up with this
20       generator, backing the root file system of the OS.
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22       systemd-veritysetup-generator implements systemd.generator(7).
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KERNEL COMMAND LINE

25       systemd-veritysetup-generator understands the following kernel command
26       line parameters:
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28       systemd.verity=, rd.systemd.verity=
29           Takes a boolean argument. Defaults to "yes". If "no", disables the
30           generator entirely.  rd.systemd.verity= is honored only by the
31           initial RAM disk (initrd) while systemd.verity= is honored by both
32           the host system and the initrd.
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34       roothash=
35           Takes a root hash value for the root file system. Expects a hash
36           value formatted in hexadecimal characters, of the appropriate
37           length (i.e. most likely 256 bit/64 characters, or longer). If not
38           specified via systemd.verity_root_data= and
39           systemd.verity_root_hash=, the hash and data devices to use are
40           automatically derived from the specified hash value. Specifically,
41           the data partition device is looked for under a GPT partition UUID
42           derived from the first 128bit of the root hash, the hash partition
43           device is looked for under a GPT partition UUID derived from the
44           last 128bit of the root hash. Hence it is usually sufficient to
45           specify the root hash to boot from an integrity protected root file
46           system, as device paths are automatically determined from it — as
47           long as the partition table is properly set up.
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49       systemd.verity_root_data=, systemd.verity_root_hash=
50           These two settings take block device paths as arguments, and may be
51           use to explicitly configure the data partition and hash partition
52           to use for setting up the integrity protection for the root file
53           system. If not specified, these paths are automatically derived
54           from the roothash= argument (see above).
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SEE ALSO

57       systemd(1), systemd-veritysetup@.service(8), veritysetup(8), systemd-
58       fstab-generator(8)
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62systemd 241                                   SYSTEMD-VERITYSETUP-GENERATOR(8)
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