FS#26610 - [cryptsetup] add descard support to initrd hook
Attached to Project:
Arch Linux
Opened by Christian Hesse (eworm) - Tuesday, 25 October 2011, 10:25 GMT
Last edited by Thomas Bächler (brain0) - Tuesday, 08 November 2011, 19:23 GMT
Opened by Christian Hesse (eworm) - Tuesday, 25 October 2011, 10:25 GMT
Last edited by Thomas Bächler (brain0) - Tuesday, 08 November 2011, 19:23 GMT
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Details
From the cryptsetup 1.4.0-rc1 announcement (Milan Broz to
the dm-crypt ml):
> * Support --enable-discards option to allow discards/TRIM requests. > > Since kernel 3.1, dm-crypt devices optionally (not by default) support > block discards (TRIM) comands. > If you want to enable this operation, you have to enable it manually > on every activation using --enable-discards > > cryptsetup luksOpen --enable-discards /dev/sdb test_disk > > WARNING: There are several security consequences, please read at least > http://asalor.blogspot.com/2011/08/trim-dm-crypt-problems.html > before you enable it. Im running cryptsetup svn (https://aur.archlinux.org/packages.php?ID=51344) with a modified initrd hook and patched device mapper modules for kernel 3.0. Works great so far. I would like to have this in official cryptsetup package when cryptsetup 1.4.0 is released, if possible disabled by default and enabled by a boot option. What would be the preferred syntax? Something like "cryptdevice=/dev/sda2:cvg:discard" or a single option "discard" or "allow_discard"? 
encrypt_hook_discard.patch
(1.6 KiB)
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This task depends upon
Closed by Thomas Bächler (brain0)
Tuesday, 08 November 2011, 19:23 GMT
Reason for closing: Implemented
Tuesday, 08 November 2011, 19:23 GMT
Reason for closing: Implemented
cryptdevice=/dev/sda2:cvg:option1,option2,...
The only valid option atm is "allow-discards" as known to cryptsetup.