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| author | Takashi Iwai <tiwai@suse.de> | 2020-04-24 08:22:16 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-04-24 08:22:55 +0200 |
| commit | 36dbae9945322e660795e73ffc8ed8ae4f25d13d (patch) | |
| tree | 9e444e68380061dccfaa453d1f02cf21c5c986ef /Documentation/filesystems/fscrypt.rst | |
| parent | 14ff6c5546e7d98f8326d9ee7a75b79de9874efb (diff) | |
| parent | 0d283287a42027e8a618bcdf17b79578041ebabd (diff) | |
Merge branch 'topic/nhlt' into for-next
Merge NHLT init cleanup.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/filesystems/fscrypt.rst')
| -rw-r--r-- | Documentation/filesystems/fscrypt.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/filesystems/fscrypt.rst b/Documentation/filesystems/fscrypt.rst index bd9932344804..aa072112cfff 100644 --- a/Documentation/filesystems/fscrypt.rst +++ b/Documentation/filesystems/fscrypt.rst @@ -633,6 +633,17 @@ from a passphrase or other low-entropy user credential. FS_IOC_GET_ENCRYPTION_PWSALT is deprecated. Instead, prefer to generate and manage any needed salt(s) in userspace. +Getting a file's encryption nonce +--------------------------------- + +Since Linux v5.7, the ioctl FS_IOC_GET_ENCRYPTION_NONCE is supported. +On encrypted files and directories it gets the inode's 16-byte nonce. +On unencrypted files and directories, it fails with ENODATA. + +This ioctl can be useful for automated tests which verify that the +encryption is being done correctly. It is not needed for normal use +of fscrypt. + Adding keys ----------- |