[PATCH v9 7/7] docs: Add documentation on keyfile and detached header options to cryptomount

[Glenn Washburn]

Signed-off-by: Glenn Washburn <development@efficientek.com>
---
 docs/grub.texi | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/docs/grub.texi b/docs/grub.texi
index 9835c878af..c1bf532636 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -4347,11 +4347,17 @@ Alias for @code{hashsum --hash crc32 arg @dots{}}. See 
command @command{hashsum}
 @node cryptomount
 @subsection cryptomount
 
-@deffn Command cryptomount [@option{-p} password] device|@option{-u} 
uuid|@option{-a}|@option{-b}
-Setup access to encrypted device. If @option{-p} is not given, a passphrase
-is requested interactively. Otherwise, the given @var{password} will be used 
and
-no passphrase will be requested interactively.
-Option @var{device} configures specific grub device
+@deffn Command cryptomount [ [@option{-p} password] | [@option{-k} keyfile 
[@option{-O} keyoffset] [@option{-S} keysize] ] ] [@option{-H} file] 
device|@option{-u} uuid|@option{-a}|@option{-b}
+Setup access to encrypted device. A passphrase will be requested interactively,
+if neither the @option{-p} nor @option{-k} options are given. The option
+@option{-p} can be used to supply a passphrase (useful for scripts).
+Alternatively the @option{-k} option can be used to supply a keyfile with
+options @option{-O} and @option{-S} optionally supplying the offset and size,
+respectively, of the key data in the given key file. The @option{-H} options 
can
+be used to supply cryptomount backends with an alternative header file (aka
+detached header). Not all backends have headers nor support alternative header
+files (currently only LUKS1 and LUKS2 support them).
+Argument @var{device} configures specific grub device
 (@pxref{Naming convention}); option @option{-u} @var{uuid} configures device
 with specified @var{uuid}; option @option{-a} configures all detected encrypted
 devices; option @option{-b} configures all geli containers that have boot flag 
set.
-- 
2.25.1