fscrypt.rst: update definition of struct fscrypt_context_v2

Commit Message

Eric Biggers Dec. 6, 2023, 12:19 a.m. UTC

From: Eric Biggers <[e-mail]>

Get the copy of the fscrypt_context_v2 definition in the documentation
in sync with the actual definition, which was changed recently by
commit 5b1188847180 ("fscrypt: support crypto data unit size less than
filesystem block size").

Signed-off-by: Eric Biggers <[e-mail]>
---
 Documentation/filesystems/fscrypt.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


base-commit: bee0e7762ad2c6025b9f5245c040fcc36ef2bde8

Patch

diff --git a/Documentation/filesystems/fscrypt.rst b/Documentation/filesystems/fscrypt.rst
index 1b84f818e574e..8d38b47b7b83c 100644
--- a/Documentation/filesystems/fscrypt.rst
+++ b/Documentation/filesystems/fscrypt.rst
@@ -1375,21 +1375,22 @@  directory.)  These structs are defined as follows::
             u8 master_key_descriptor[FSCRYPT_KEY_DESCRIPTOR_SIZE];
             u8 nonce[FSCRYPT_FILE_NONCE_SIZE];
     };
 
     #define FSCRYPT_KEY_IDENTIFIER_SIZE  16
     struct fscrypt_context_v2 {
             u8 version;
             u8 contents_encryption_mode;
             u8 filenames_encryption_mode;
             u8 flags;
-            u8 __reserved[4];
+            u8 log2_data_unit_size;
+            u8 __reserved[3];
             u8 master_key_identifier[FSCRYPT_KEY_IDENTIFIER_SIZE];
             u8 nonce[FSCRYPT_FILE_NONCE_SIZE];
     };
 
 The context structs contain the same information as the corresponding
 policy structs (see `Setting an encryption policy`_), except that the
 context structs also contain a nonce.  The nonce is randomly generated
 by the kernel and is used as KDF input or as a tweak to cause
 different files to be encrypted differently; see `Per-file encryption
 keys`_ and `DIRECT_KEY policies`_.