mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
lib: Move some appliance functions around.
Move some appliance functions out of src/appliance.c and src/launch.c into separate files. No functional change, just code movement.
This commit is contained in:
Richard W.M. Jones
@@ -309,6 +309,9 @@ src/actions-6.c
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src/actions-support.c
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src/actions-variants.c
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src/alloc.c
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src/appliance-cpu.c
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src/appliance-kcmdline.c
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src/appliance-uefi.c
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src/appliance.c
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src/available.c
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src/bindtests.c
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@@ -381,6 +381,9 @@ src/actions-6.c
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src/actions-support.c
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src/actions-variants.c
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src/alloc.c
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src/appliance-cpu.c
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src/appliance-kcmdline.c
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src/appliance-uefi.c
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src/appliance.c
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src/available.c
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src/bindtests.c
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@@ -82,6 +82,9 @@ libguestfs_la_SOURCES = \
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actions-variants.c \
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alloc.c \
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appliance.c \
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appliance-cpu.c \
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appliance-kcmdline.c \
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appliance-uefi.c \
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available.c \
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bindtests.c \
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canonical-name.c \
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90
src/appliance-cpu.c
Normal file
90
src/appliance-cpu.c
Normal file
@@ -0,0 +1,90 @@
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/* libguestfs
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* Copyright (C) 2009-2016 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* The appliance choice of CPU model.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "guestfs.h"
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#include "guestfs-internal.h"
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/**
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* Return the right CPU model to use as the qemu C<-cpu> parameter or
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* its equivalent in libvirt. This returns:
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*
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* =over 4
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*
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* =item C<"host">
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*
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* The literal string C<"host"> means use C<-cpu host>.
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*
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* =item some string
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*
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* Some string such as C<"cortex-a57"> means use C<-cpu cortex-a57>.
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*
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* =item C<NULL>
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*
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* C<NULL> means no C<-cpu> option at all. Note returning C<NULL>
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* does not indicate an error.
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*
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* =back
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*
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* This is made unnecessarily hard and fragile because of two stupid
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* choices in QEMU:
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*
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* =over 4
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*
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* =item *
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*
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* The default for C<qemu-system-aarch64 -M virt> is to emulate a
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* C<cortex-a15> (WTF?).
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*
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* =item *
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*
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* We don't know for sure if KVM will work, but C<-cpu host> is broken
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* with TCG, so we almost always pass a broken C<-cpu> flag if KVM is
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* semi-broken in any way.
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*
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* =back
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*/
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const char *
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guestfs_int_get_cpu_model (int kvm)
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{
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#if defined(__aarch64__)
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/* With -M virt, the default -cpu is cortex-a15. Stupid. */
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if (kvm)
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return "host";
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else
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return "cortex-a57";
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#else
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/* On most architectures, it is faster to pass the CPU host model to
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* the appliance, allowing maximum speed for things like checksums
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* and encryption. Only do this with KVM. It is broken in subtle
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* ways on TCG, and fairly pointless when you're emulating anyway.
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*/
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if (kvm)
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return "host";
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else
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return NULL;
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#endif
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}
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219
src/appliance-kcmdline.c
Normal file
219
src/appliance-kcmdline.c
Normal file
@@ -0,0 +1,219 @@
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/* libguestfs
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* Copyright (C) 2009-2016 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* The appliance kernel command line.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <string.h>
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#include "c-ctype.h"
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#include "guestfs.h"
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#include "guestfs-internal.h"
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/**
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* Check that the $TERM environment variable is reasonable before
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* we pass it through to the appliance.
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*/
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static bool
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valid_term (const char *term)
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{
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size_t len = strlen (term);
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if (len == 0 || len > 16)
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return false;
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while (len > 0) {
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char c = *term++;
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len--;
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if (!c_isalnum (c) && c != '-' && c != '_')
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return false;
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}
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return true;
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}
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#if defined(__powerpc64__)
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#define SERIAL_CONSOLE "console=hvc0 console=ttyS0"
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#elif defined(__arm__) || defined(__aarch64__)
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#define SERIAL_CONSOLE "console=ttyAMA0"
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#else
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#define SERIAL_CONSOLE "console=ttyS0"
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#endif
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#if defined(__aarch64__)
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#define EARLYPRINTK "earlyprintk=pl011,0x9000000"
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#endif
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/**
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* Construct the Linux command line passed to the appliance. This is
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* used by the C<direct> and C<libvirt> backends, and is simply
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* located in this file because it's a convenient place for this
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* common code.
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*
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* The C<appliance_dev> parameter must be the full device name of the
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* appliance disk and must have already been adjusted to take into
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* account virtio-blk or virtio-scsi; eg C</dev/sdb>.
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*
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* The C<flags> parameter can contain the following flags logically
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* or'd together (or 0):
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*
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* =over 4
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*
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* =item C<APPLIANCE_COMMAND_LINE_IS_TCG>
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*
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* If we are launching a qemu TCG guest (ie. KVM is known to be
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* disabled or unavailable). If you don't know, don't pass this flag.
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*
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* =back
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*
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* Note that this function returns a newly allocated buffer which must
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* be freed by the caller.
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*/
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char *
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guestfs_int_appliance_command_line (guestfs_h *g, const char *appliance_dev,
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int flags)
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{
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CLEANUP_FREE_STRINGSBUF DECLARE_STRINGSBUF (argv);
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char *term = getenv ("TERM");
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bool tcg = flags & APPLIANCE_COMMAND_LINE_IS_TCG;
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char *ret;
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/* We assemble the kernel command line by simply joining the final
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* list of strings with spaces. This means (a) the strings are not
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* quoted (it's not clear if the kernel can handle quoting in any
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* case), and (b) we can append multiple parameters in a single
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* argument, as we must do for the g->append parameter.
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*/
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/* Force kernel to panic if daemon exits. */
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guestfs_int_add_string (g, &argv, "panic=1");
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#ifdef __arm__
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guestfs_int_add_sprintf (g, &argv, "mem=%dM", g->memsize);
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#endif
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#ifdef __i386__
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/* Workaround for RHBZ#857026. */
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guestfs_int_add_string (g, &argv, "noapic");
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#endif
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/* Serial console. */
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guestfs_int_add_string (g, &argv, SERIAL_CONSOLE);
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#ifdef EARLYPRINTK
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/* Get messages from early boot. */
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guestfs_int_add_string (g, &argv, EARLYPRINTK);
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#endif
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#ifdef __aarch64__
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guestfs_int_add_string (g, &argv, "ignore_loglevel");
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/* This option turns off the EFI RTC device. QEMU VMs don't
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* currently provide EFI, and if the device is compiled in it
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* will try to call the EFI function GetTime unconditionally
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* (causing a call to NULL). However this option requires a
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* non-upstream patch.
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*/
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guestfs_int_add_string (g, &argv, "efi-rtc=noprobe");
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#endif
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/* RHBZ#1404287 */
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guestfs_int_add_string (g, &argv, "edd=off");
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/* For slow systems (RHBZ#480319, RHBZ#1096579). */
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guestfs_int_add_string (g, &argv, "udevtimeout=6000");
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/* Same as above, for newer udevd. */
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guestfs_int_add_string (g, &argv, "udev.event-timeout=6000");
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/* Fix for RHBZ#502058. */
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guestfs_int_add_string (g, &argv, "no_timer_check");
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if (tcg) {
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const int lpj = guestfs_int_get_lpj (g);
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if (lpj > 0)
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guestfs_int_add_sprintf (g, &argv, "lpj=%d", lpj);
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}
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/* Display timestamp before kernel messages. */
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guestfs_int_add_string (g, &argv, "printk.time=1");
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/* Saves us about 5 MB of RAM. */
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guestfs_int_add_string (g, &argv, "cgroup_disable=memory");
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/* Disable USB, only saves about 1ms. */
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guestfs_int_add_string (g, &argv, "usbcore.nousb");
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/* Disable crypto tests, saves 28ms. */
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guestfs_int_add_string (g, &argv, "cryptomgr.notests");
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/* Don't synch TSCs when using SMP. Saves 21ms for each secondary vCPU. */
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guestfs_int_add_string (g, &argv, "tsc=reliable");
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/* Don't scan all 8250 UARTS. */
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guestfs_int_add_string (g, &argv, "8250.nr_uarts=1");
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/* Tell supermin about the appliance device. */
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if (appliance_dev)
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guestfs_int_add_sprintf (g, &argv, "root=%s", appliance_dev);
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/* SELinux - deprecated setting, never worked and should not be enabled. */
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if (g->selinux)
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guestfs_int_add_string (g, &argv, "selinux=1 enforcing=0");
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else
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guestfs_int_add_string (g, &argv, "selinux=0");
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/* Quiet/verbose. */
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if (g->verbose)
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guestfs_int_add_string (g, &argv, "guestfs_verbose=1");
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else
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guestfs_int_add_string (g, &argv, "quiet");
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/* Network. */
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if (g->enable_network)
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guestfs_int_add_string (g, &argv, "guestfs_network=1");
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/* TERM environment variable. */
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if (term && valid_term (term))
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guestfs_int_add_sprintf (g, &argv, "TERM=%s", term);
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else
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guestfs_int_add_string (g, &argv, "TERM=linux");
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/* Handle identifier. */
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if (STRNEQ (g->identifier, ""))
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guestfs_int_add_sprintf (g, &argv, "guestfs_identifier=%s", g->identifier);
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/* Append extra arguments. */
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if (g->append)
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guestfs_int_add_string (g, &argv, g->append);
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guestfs_int_end_stringsbuf (g, &argv);
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/* Caller frees. */
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ret = guestfs_int_join_strings (" ", argv.argv);
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if (ret == NULL)
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g->abort_cb ();
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return ret;
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}
|
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105
src/appliance-uefi.c
Normal file
105
src/appliance-uefi.c
Normal file
@@ -0,0 +1,105 @@
|
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/* libguestfs
|
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* Copyright (C) 2010-2016 Red Hat Inc.
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
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|
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/**
|
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* Find the UEFI firmware needed to boot the appliance.
|
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*
|
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* See also F<src/uefi.c> (autogenerated file) containing the
|
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* firmware file locations.
|
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*/
|
||||
|
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#include <config.h>
|
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|
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#include <stdio.h>
|
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#include <stdlib.h>
|
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#include <string.h>
|
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|
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#include "guestfs.h"
|
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#include "guestfs-internal.h"
|
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|
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/**
|
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* Return the location of firmware needed to boot the appliance. This
|
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* is aarch64 only currently, since that's the only architecture where
|
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* UEFI is mandatory (and that only for RHEL).
|
||||
*
|
||||
* C<*code> is initialized with the path to the read-only UEFI code
|
||||
* file. C<*vars> is initialized with the path to a copy of the UEFI
|
||||
* vars file (which is cleaned up automatically on exit).
|
||||
*
|
||||
* If C<*code> == C<*vars> == C<NULL> then no UEFI firmware is
|
||||
* available.
|
||||
*
|
||||
* C<*code> and C<*vars> should be freed by the caller.
|
||||
*
|
||||
* If the function returns C<-1> then there was a real error which
|
||||
* should cause appliance building to fail (no UEFI firmware is not an
|
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* error).
|
||||
*
|
||||
* See also F<v2v/utils.ml>:find_uefi_firmware
|
||||
*/
|
||||
int
|
||||
guestfs_int_get_uefi (guestfs_h *g, char **code, char **vars, int *flags)
|
||||
{
|
||||
#ifdef __aarch64__
|
||||
size_t i;
|
||||
|
||||
for (i = 0; guestfs_int_uefi_aarch64_firmware[i].code != NULL; ++i) {
|
||||
const char *codefile = guestfs_int_uefi_aarch64_firmware[i].code;
|
||||
const char *code_debug_file =
|
||||
guestfs_int_uefi_aarch64_firmware[i].code_debug;
|
||||
const char *varsfile = guestfs_int_uefi_aarch64_firmware[i].vars;
|
||||
|
||||
if (access (codefile, R_OK) == 0 && access (varsfile, R_OK) == 0) {
|
||||
CLEANUP_CMD_CLOSE struct command *copycmd = guestfs_int_new_command (g);
|
||||
char *varst;
|
||||
int r;
|
||||
|
||||
/* Make a copy of NVRAM variables file. You can't just map it
|
||||
* into the address space read-only as that triggers a different
|
||||
* path inside UEFI.
|
||||
*/
|
||||
varst = safe_asprintf (g, "%s/vars.fd.%d", g->tmpdir, ++g->unique);
|
||||
guestfs_int_cmd_add_arg (copycmd, "cp");
|
||||
guestfs_int_cmd_add_arg (copycmd, varsfile);
|
||||
guestfs_int_cmd_add_arg (copycmd, varst);
|
||||
r = guestfs_int_cmd_run (copycmd);
|
||||
if (r == -1 || !WIFEXITED (r) || WEXITSTATUS (r) != 0) {
|
||||
free (varst);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* If debugging is enabled and we can find the code file with
|
||||
* debugging enabled, use that instead.
|
||||
*/
|
||||
if (g->verbose && access (code_debug_file, R_OK) == 0)
|
||||
codefile = code_debug_file;
|
||||
|
||||
/* Caller frees. */
|
||||
*code = safe_strdup (g, codefile);
|
||||
*vars = varst;
|
||||
*flags = guestfs_int_uefi_aarch64_firmware[i].flags;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Not found. */
|
||||
*code = *vars = NULL;
|
||||
*flags = 0;
|
||||
return 0;
|
||||
}
|
||||
@@ -404,75 +404,3 @@ dir_contains_files (guestfs_h *g, const char *dir, ...)
|
||||
va_end (args);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the location of firmware needed to boot the appliance. This
|
||||
* is aarch64 only currently, since that's the only architecture where
|
||||
* UEFI is mandatory (and that only for RHEL).
|
||||
*
|
||||
* C<*code> is initialized with the path to the read-only UEFI code
|
||||
* file. C<*vars> is initialized with the path to a copy of the UEFI
|
||||
* vars file (which is cleaned up automatically on exit).
|
||||
*
|
||||
* If C<*code> == C<*vars> == C<NULL> then no UEFI firmware is
|
||||
* available.
|
||||
*
|
||||
* C<*code> and C<*vars> should be freed by the caller.
|
||||
*
|
||||
* If the function returns C<-1> then there was a real error which
|
||||
* should cause appliance building to fail (no UEFI firmware is not an
|
||||
* error).
|
||||
*
|
||||
* See also F<v2v/utils.ml>:find_uefi_firmware
|
||||
*/
|
||||
int
|
||||
guestfs_int_get_uefi (guestfs_h *g, char **code, char **vars, int *flags)
|
||||
{
|
||||
#ifdef __aarch64__
|
||||
size_t i;
|
||||
|
||||
for (i = 0; guestfs_int_uefi_aarch64_firmware[i].code != NULL; ++i) {
|
||||
const char *codefile = guestfs_int_uefi_aarch64_firmware[i].code;
|
||||
const char *code_debug_file =
|
||||
guestfs_int_uefi_aarch64_firmware[i].code_debug;
|
||||
const char *varsfile = guestfs_int_uefi_aarch64_firmware[i].vars;
|
||||
|
||||
if (access (codefile, R_OK) == 0 && access (varsfile, R_OK) == 0) {
|
||||
CLEANUP_CMD_CLOSE struct command *copycmd = guestfs_int_new_command (g);
|
||||
char *varst;
|
||||
int r;
|
||||
|
||||
/* Make a copy of NVRAM variables file. You can't just map it
|
||||
* into the address space read-only as that triggers a different
|
||||
* path inside UEFI.
|
||||
*/
|
||||
varst = safe_asprintf (g, "%s/vars.fd.%d", g->tmpdir, ++g->unique);
|
||||
guestfs_int_cmd_add_arg (copycmd, "cp");
|
||||
guestfs_int_cmd_add_arg (copycmd, varsfile);
|
||||
guestfs_int_cmd_add_arg (copycmd, varst);
|
||||
r = guestfs_int_cmd_run (copycmd);
|
||||
if (r == -1 || !WIFEXITED (r) || WEXITSTATUS (r) != 0) {
|
||||
free (varst);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* If debugging is enabled and we can find the code file with
|
||||
* debugging enabled, use that instead.
|
||||
*/
|
||||
if (g->verbose && access (code_debug_file, R_OK) == 0)
|
||||
codefile = code_debug_file;
|
||||
|
||||
/* Caller frees. */
|
||||
*code = safe_strdup (g, codefile);
|
||||
*vars = varst;
|
||||
*flags = guestfs_int_uefi_aarch64_firmware[i].flags;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Not found. */
|
||||
*code = *vars = NULL;
|
||||
*flags = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
@@ -831,14 +831,20 @@ extern const char *guestfs_int_drive_protocol_to_string (enum drive_protocol pro
|
||||
|
||||
/* appliance.c */
|
||||
extern int guestfs_int_build_appliance (guestfs_h *g, char **kernel, char **initrd, char **appliance);
|
||||
|
||||
/* appliance-cpu.c */
|
||||
const char *guestfs_int_get_cpu_model (int kvm);
|
||||
|
||||
/* appliance-kcmdline.c */
|
||||
extern char *guestfs_int_appliance_command_line (guestfs_h *g, const char *appliance_dev, int flags);
|
||||
#define APPLIANCE_COMMAND_LINE_IS_TCG 1
|
||||
|
||||
/* appliance-uefi.c */
|
||||
extern int guestfs_int_get_uefi (guestfs_h *g, char **code, char **vars, int *flags);
|
||||
|
||||
/* launch.c */
|
||||
extern int64_t guestfs_int_timeval_diff (const struct timeval *x, const struct timeval *y);
|
||||
extern void guestfs_int_launch_send_progress (guestfs_h *g, int perdozen);
|
||||
extern char *guestfs_int_appliance_command_line (guestfs_h *g, const char *appliance_dev, int flags);
|
||||
#define APPLIANCE_COMMAND_LINE_IS_TCG 1
|
||||
const char *guestfs_int_get_cpu_model (int kvm);
|
||||
int guestfs_int_create_socketname (guestfs_h *g, const char *filename, char (*sockname)[UNIX_PATH_MAX]);
|
||||
extern void guestfs_int_register_backend (const char *name, const struct backend_ops *);
|
||||
extern int guestfs_int_set_backend (guestfs_h *g, const char *method);
|
||||
|
||||
248
src/launch.c
248
src/launch.c
@@ -29,7 +29,6 @@
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdbool.h>
|
||||
#include <inttypes.h>
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
@@ -287,253 +286,6 @@ guestfs_impl_config (guestfs_h *g,
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check that the $TERM environment variable is reasonable before
|
||||
* we pass it through to the appliance.
|
||||
*/
|
||||
static bool
|
||||
valid_term (const char *term)
|
||||
{
|
||||
size_t len = strlen (term);
|
||||
|
||||
if (len == 0 || len > 16)
|
||||
return false;
|
||||
|
||||
while (len > 0) {
|
||||
char c = *term++;
|
||||
len--;
|
||||
if (!c_isalnum (c) && c != '-' && c != '_')
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
#if defined(__powerpc64__)
|
||||
#define SERIAL_CONSOLE "console=hvc0 console=ttyS0"
|
||||
#elif defined(__arm__) || defined(__aarch64__)
|
||||
#define SERIAL_CONSOLE "console=ttyAMA0"
|
||||
#else
|
||||
#define SERIAL_CONSOLE "console=ttyS0"
|
||||
#endif
|
||||
|
||||
#if defined(__aarch64__)
|
||||
#define EARLYPRINTK "earlyprintk=pl011,0x9000000"
|
||||
#endif
|
||||
|
||||
/**
|
||||
* Construct the Linux command line passed to the appliance. This is
|
||||
* used by the C<direct> and C<libvirt> backends, and is simply
|
||||
* located in this file because it's a convenient place for this
|
||||
* common code.
|
||||
*
|
||||
* The C<appliance_dev> parameter must be the full device name of the
|
||||
* appliance disk and must have already been adjusted to take into
|
||||
* account virtio-blk or virtio-scsi; eg C</dev/sdb>.
|
||||
*
|
||||
* The C<flags> parameter can contain the following flags logically
|
||||
* or'd together (or 0):
|
||||
*
|
||||
* =over 4
|
||||
*
|
||||
* =item C<APPLIANCE_COMMAND_LINE_IS_TCG>
|
||||
*
|
||||
* If we are launching a qemu TCG guest (ie. KVM is known to be
|
||||
* disabled or unavailable). If you don't know, don't pass this flag.
|
||||
*
|
||||
* =back
|
||||
*
|
||||
* Note that this function returns a newly allocated buffer which must
|
||||
* be freed by the caller.
|
||||
*/
|
||||
char *
|
||||
guestfs_int_appliance_command_line (guestfs_h *g, const char *appliance_dev,
|
||||
int flags)
|
||||
{
|
||||
CLEANUP_FREE_STRINGSBUF DECLARE_STRINGSBUF (argv);
|
||||
char *term = getenv ("TERM");
|
||||
bool tcg = flags & APPLIANCE_COMMAND_LINE_IS_TCG;
|
||||
char *ret;
|
||||
|
||||
/* We assemble the kernel command line by simply joining the final
|
||||
* list of strings with spaces. This means (a) the strings are not
|
||||
* quoted (it's not clear if the kernel can handle quoting in any
|
||||
* case), and (b) we can append multiple parameters in a single
|
||||
* argument, as we must do for the g->append parameter.
|
||||
*/
|
||||
|
||||
/* Force kernel to panic if daemon exits. */
|
||||
guestfs_int_add_string (g, &argv, "panic=1");
|
||||
|
||||
#ifdef __arm__
|
||||
guestfs_int_add_sprintf (g, &argv, "mem=%dM", g->memsize);
|
||||
#endif
|
||||
|
||||
#ifdef __i386__
|
||||
/* Workaround for RHBZ#857026. */
|
||||
guestfs_int_add_string (g, &argv, "noapic");
|
||||
#endif
|
||||
|
||||
/* Serial console. */
|
||||
guestfs_int_add_string (g, &argv, SERIAL_CONSOLE);
|
||||
|
||||
#ifdef EARLYPRINTK
|
||||
/* Get messages from early boot. */
|
||||
guestfs_int_add_string (g, &argv, EARLYPRINTK);
|
||||
#endif
|
||||
|
||||
#ifdef __aarch64__
|
||||
guestfs_int_add_string (g, &argv, "ignore_loglevel");
|
||||
|
||||
/* This option turns off the EFI RTC device. QEMU VMs don't
|
||||
* currently provide EFI, and if the device is compiled in it
|
||||
* will try to call the EFI function GetTime unconditionally
|
||||
* (causing a call to NULL). However this option requires a
|
||||
* non-upstream patch.
|
||||
*/
|
||||
guestfs_int_add_string (g, &argv, "efi-rtc=noprobe");
|
||||
#endif
|
||||
|
||||
/* RHBZ#1404287 */
|
||||
guestfs_int_add_string (g, &argv, "edd=off");
|
||||
|
||||
/* For slow systems (RHBZ#480319, RHBZ#1096579). */
|
||||
guestfs_int_add_string (g, &argv, "udevtimeout=6000");
|
||||
|
||||
/* Same as above, for newer udevd. */
|
||||
guestfs_int_add_string (g, &argv, "udev.event-timeout=6000");
|
||||
|
||||
/* Fix for RHBZ#502058. */
|
||||
guestfs_int_add_string (g, &argv, "no_timer_check");
|
||||
|
||||
if (tcg) {
|
||||
const int lpj = guestfs_int_get_lpj (g);
|
||||
if (lpj > 0)
|
||||
guestfs_int_add_sprintf (g, &argv, "lpj=%d", lpj);
|
||||
}
|
||||
|
||||
/* Display timestamp before kernel messages. */
|
||||
guestfs_int_add_string (g, &argv, "printk.time=1");
|
||||
|
||||
/* Saves us about 5 MB of RAM. */
|
||||
guestfs_int_add_string (g, &argv, "cgroup_disable=memory");
|
||||
|
||||
/* Disable USB, only saves about 1ms. */
|
||||
guestfs_int_add_string (g, &argv, "usbcore.nousb");
|
||||
|
||||
/* Disable crypto tests, saves 28ms. */
|
||||
guestfs_int_add_string (g, &argv, "cryptomgr.notests");
|
||||
|
||||
/* Don't synch TSCs when using SMP. Saves 21ms for each secondary vCPU. */
|
||||
guestfs_int_add_string (g, &argv, "tsc=reliable");
|
||||
|
||||
/* Don't scan all 8250 UARTS. */
|
||||
guestfs_int_add_string (g, &argv, "8250.nr_uarts=1");
|
||||
|
||||
/* Tell supermin about the appliance device. */
|
||||
if (appliance_dev)
|
||||
guestfs_int_add_sprintf (g, &argv, "root=%s", appliance_dev);
|
||||
|
||||
/* SELinux - deprecated setting, never worked and should not be enabled. */
|
||||
if (g->selinux)
|
||||
guestfs_int_add_string (g, &argv, "selinux=1 enforcing=0");
|
||||
else
|
||||
guestfs_int_add_string (g, &argv, "selinux=0");
|
||||
|
||||
/* Quiet/verbose. */
|
||||
if (g->verbose)
|
||||
guestfs_int_add_string (g, &argv, "guestfs_verbose=1");
|
||||
else
|
||||
guestfs_int_add_string (g, &argv, "quiet");
|
||||
|
||||
/* Network. */
|
||||
if (g->enable_network)
|
||||
guestfs_int_add_string (g, &argv, "guestfs_network=1");
|
||||
|
||||
/* TERM environment variable. */
|
||||
if (term && valid_term (term))
|
||||
guestfs_int_add_sprintf (g, &argv, "TERM=%s", term);
|
||||
else
|
||||
guestfs_int_add_string (g, &argv, "TERM=linux");
|
||||
|
||||
/* Handle identifier. */
|
||||
if (STRNEQ (g->identifier, ""))
|
||||
guestfs_int_add_sprintf (g, &argv, "guestfs_identifier=%s", g->identifier);
|
||||
|
||||
/* Append extra arguments. */
|
||||
if (g->append)
|
||||
guestfs_int_add_string (g, &argv, g->append);
|
||||
|
||||
guestfs_int_end_stringsbuf (g, &argv);
|
||||
|
||||
/* Caller frees. */
|
||||
ret = guestfs_int_join_strings (" ", argv.argv);
|
||||
if (ret == NULL)
|
||||
g->abort_cb ();
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the right CPU model to use as the qemu C<-cpu> parameter or
|
||||
* its equivalent in libvirt. This returns:
|
||||
*
|
||||
* =over 4
|
||||
*
|
||||
* =item C<"host">
|
||||
*
|
||||
* The literal string C<"host"> means use C<-cpu host>.
|
||||
*
|
||||
* =item some string
|
||||
*
|
||||
* Some string such as C<"cortex-a57"> means use C<-cpu cortex-a57>.
|
||||
*
|
||||
* =item C<NULL>
|
||||
*
|
||||
* C<NULL> means no C<-cpu> option at all. Note returning C<NULL>
|
||||
* does not indicate an error.
|
||||
*
|
||||
* =back
|
||||
*
|
||||
* This is made unnecessarily hard and fragile because of two stupid
|
||||
* choices in QEMU:
|
||||
*
|
||||
* =over 4
|
||||
*
|
||||
* =item *
|
||||
*
|
||||
* The default for C<qemu-system-aarch64 -M virt> is to emulate a
|
||||
* C<cortex-a15> (WTF?).
|
||||
*
|
||||
* =item *
|
||||
*
|
||||
* We don't know for sure if KVM will work, but C<-cpu host> is broken
|
||||
* with TCG, so we almost always pass a broken C<-cpu> flag if KVM is
|
||||
* semi-broken in any way.
|
||||
*
|
||||
* =back
|
||||
*/
|
||||
const char *
|
||||
guestfs_int_get_cpu_model (int kvm)
|
||||
{
|
||||
#if defined(__aarch64__)
|
||||
/* With -M virt, the default -cpu is cortex-a15. Stupid. */
|
||||
if (kvm)
|
||||
return "host";
|
||||
else
|
||||
return "cortex-a57";
|
||||
#else
|
||||
/* On most architectures, it is faster to pass the CPU host model to
|
||||
* the appliance, allowing maximum speed for things like checksums
|
||||
* and encryption. Only do this with KVM. It is broken in subtle
|
||||
* ways on TCG, and fairly pointless when you're emulating anyway.
|
||||
*/
|
||||
if (kvm)
|
||||
return "host";
|
||||
else
|
||||
return NULL;
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
* Create the path for a socket with the selected filename in the
|
||||
* tmpdir.
|
||||
|
||||
Reference in New Issue
Block a user