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-rw-r--r--Documentation/filesystems/ubifs.txt7
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diff --git a/Documentation/filesystems/ubifs.txt b/Documentation/filesystems/ubifs.txt
index a0a61d2f389f..acc80442a3bb 100644
--- a/Documentation/filesystems/ubifs.txt
+++ b/Documentation/filesystems/ubifs.txt
@@ -91,6 +91,13 @@ chk_data_crc do not skip checking CRCs on data nodes
compr=none override default compressor and set it to "none"
compr=lzo override default compressor and set it to "lzo"
compr=zlib override default compressor and set it to "zlib"
+auth_key= specify the key used for authenticating the filesystem.
+ Passing this option makes authentication mandatory.
+ The passed key must be present in the kernel keyring
+ and must be of type 'logon'
+auth_hash_name= The hash algorithm used for authentication. Used for
+ both hashing and for creating HMACs. Typical values
+ include "sha256" or "sha512"
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