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| author | Eric Biggers <ebiggers@google.com> | 2019-11-17 17:48:47 -0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-11-18 12:14:33 -0500 |
| commit | be335e31e77a28a8448d538b0d9416a2a3f8eb0d (patch) | |
| tree | f4d496eacef1ca1bb75923edcf26dd0bed7517be | |
| parent | b9bb6a512ef566b43b7734fe1c5177c15b6a7d25 (diff) | |
| download | e2fsprogs-be335e31e77a28a8448d538b0d9416a2a3f8eb0d.tar.gz | |
chattr.1: document the verity attribute
Document the verity file attribute ('V').
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | misc/chattr.1.in | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/misc/chattr.1.in b/misc/chattr.1.in index 1c9e89646..2122a13ef 100644 --- a/misc/chattr.1.in +++ b/misc/chattr.1.in @@ -52,7 +52,8 @@ The following attributes are read-only, and may be listed by but not modified by chattr: encrypted (E), indexed directory (I), -and inline data (N). +inline data (N), +and verity (V). .PP Not all flags are supported or utilized by all filesystems; refer to filesystem-specific man pages such as @@ -189,6 +190,15 @@ saved. This allows the user to ask for its undeletion. Note: please make sure to read the bugs and limitations section at the end of this document. .PP +A file with the 'V' attribute set has fs-verity enabled. It cannot be +written to, and the filesystem will automatically verify all data read +from it against a cryptographic hash that covers the entire file's +contents, e.g. via a Merkle tree. This makes it possible to efficiently +authenticate the file. This attribute may not be set or reset using +.BR chattr (1), +although it can be displayed by +.BR lsattr (1). +.PP .SH AUTHOR .B chattr was written by Remy Card <Remy.Card@linux.org>. It is currently being |