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efiloader: don't execute hooks when setting currdev/loaddev

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We still need to set the hooks to prevent improper manipulations thereafter
at the loader prompt, but as it is we're actively preventing loaddev from
being set correctly in some circumstances (ZFS in particular) and doing more
work than needed with currdev -- that hook in particular validates it as a
correct device, which we can assume isn't needed in this context.

Reviewed by:	imp, sigsys@gmail.com
Submitted/Diagnosed by:	sigsys@gmail.com
Differential Revision:	https://reviews.freebsd.org/D23390
This commit is contained in:
Kyle Evans 2020-02-12 22:29:08 +00:00
parent 6c4a4f1bc2
commit 6b197e58f6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=357845
1 changed files with 11 additions and 2 deletions
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13
stand/efi/loader/main.c
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@ -180,8 +180,17 @@ static void
set_currdev(const char *devname)
{
env_setenv("currdev", EV_VOLATILE, devname, efi_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, devname, env_noset, env_nounset);
/*
* Don't execute hooks here; we may need to try setting these more than
* once here if we're probing for the ZFS pool we're supposed to boot.
* The currdev hook is intended to just validate user input anyways,
* while the loaddev hook makes it immutable once we've determined what
* the proper currdev is.
*/
env_setenv("currdev", EV_VOLATILE | EV_NOHOOK, devname, efi_setcurrdev,
env_nounset);
env_setenv("loaddev", EV_VOLATILE | EV_NOHOOK, devname, env_noset,
env_nounset);
}
static void