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/*
* Copyright (C) 2014
* Author Roger Pau Monne <roger.pau@entel.upc.edu>
*
* This program 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; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program 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.
*/
#include "libxl_osdeps.h" /* must come before any other headers */
#include "libxl_internal.h"
int libxl__try_phy_backend(mode_t st_mode)
{
if (S_ISREG(st_mode) || S_ISBLK(st_mode) || S_ISCHR(st_mode))
return 1;
return 0;
}
char *libxl__devid_to_localdev(libxl__gc *gc, int devid)
{
/* This translation table has been copied from the FreeBSD blkfront code. */
const static struct vdev_info {
int major;
int shift;
int base;
const char *name;
} info[] = {
{3, 6, 0, "ada"}, /* ide0 */
{22, 6, 2, "ada"}, /* ide1 */
{33, 6, 4, "ada"}, /* ide2 */
{34, 6, 6, "ada"}, /* ide3 */
{56, 6, 8, "ada"}, /* ide4 */
{57, 6, 10, "ada"}, /* ide5 */
{88, 6, 12, "ada"}, /* ide6 */
{89, 6, 14, "ada"}, /* ide7 */
{90, 6, 16, "ada"}, /* ide8 */
{91, 6, 18, "ada"}, /* ide9 */
{8, 4, 0, "da"}, /* scsi disk0 */
{65, 4, 16, "da"}, /* scsi disk1 */
{66, 4, 32, "da"}, /* scsi disk2 */
{67, 4, 48, "da"}, /* scsi disk3 */
{68, 4, 64, "da"}, /* scsi disk4 */
{69, 4, 80, "da"}, /* scsi disk5 */
{70, 4, 96, "da"}, /* scsi disk6 */
{71, 4, 112, "da"}, /* scsi disk7 */
{128, 4, 128, "da"}, /* scsi disk8 */
{129, 4, 144, "da"}, /* scsi disk9 */
{130, 4, 160, "da"}, /* scsi disk10 */
{131, 4, 176, "da"}, /* scsi disk11 */
{132, 4, 192, "da"}, /* scsi disk12 */
{133, 4, 208, "da"}, /* scsi disk13 */
{134, 4, 224, "da"}, /* scsi disk14 */
{135, 4, 240, "da"}, /* scsi disk15 */
{202, 4, 0, "xbd"}, /* xbd */
{0, 0, 0, NULL},
};
int major = devid >> 8;
int minor = devid & 0xff;
int i;
if (devid & (1 << 28))
return GCSPRINTF("%s%d", "xbd", (devid & ((1 << 28) - 1)) >> 8);
for (i = 0; info[i].major; i++)
if (info[i].major == major)
return GCSPRINTF("%s%d", info[i].name,
info[i].base + (minor >> info[i].shift));
return GCSPRINTF("%s%d", "xbd", minor >> 4);
}
/* Hotplug scripts caller functions */
static int libxl__hotplug_env_nic(libxl__gc *gc, libxl__device *dev, char ***env,
int num_exec)
{
int nr = 0;
const int arraysize = 5;
libxl_nic_type type;
assert(dev->backend_kind == LIBXL__DEVICE_KIND_VIF);
/*
* On the first pass the PV interface is added to the bridge,
* on the second pass the tap interface will also be added.
*/
type = num_exec == 0 ? LIBXL_NIC_TYPE_VIF : LIBXL_NIC_TYPE_VIF_IOEMU;
GCNEW_ARRAY(*env, arraysize);
(*env)[nr++] = "iface_dev";
(*env)[nr++] = (char *) libxl__device_nic_devname(gc, dev->domid,
dev->devid, type);
(*env)[nr++] = "emulated";
(*env)[nr++] = type == LIBXL_NIC_TYPE_VIF_IOEMU ? "1" : "0";
(*env)[nr++] = NULL;
assert(nr == arraysize);
return 0;
}
static int libxl__hotplug_nic(libxl__gc *gc, libxl__device *dev,
char ***args, char ***env,
libxl__device_action action,
int num_exec)
{
libxl_nic_type nictype;
char *be_path = libxl__device_backend_path(gc, dev);
char *script;
int nr = 0, rc;
rc = libxl__nic_type(gc, dev, &nictype);
if (rc) {
LOGD(ERROR, dev->domid, "error when fetching nic type");
rc = ERROR_FAIL;
goto out;
}
/*
* For PV domains only one pass is needed (because there's no emulated
* interface). For HVM domains two passes are needed in order to add
* both the PV and the tap interfaces to the bridge.
*/
if (nictype == LIBXL_NIC_TYPE_VIF && num_exec != 0) {
rc = 0;
goto out;
}
rc = libxl__hotplug_env_nic(gc, dev, env, num_exec);
if (rc)
goto out;
script = libxl__xs_read(gc, XBT_NULL,
GCSPRINTF("%s/%s", be_path, "script"));
if (!script) {
LOGEVD(ERROR, errno, dev->domid,
"unable to read script from %s", be_path);
rc = ERROR_FAIL;
goto out;
}
const int arraysize = 4;
GCNEW_ARRAY(*args, arraysize);
(*args)[nr++] = script;
(*args)[nr++] = be_path;
(*args)[nr++] = (char *) libxl__device_action_to_string(action);
(*args)[nr++] = NULL;
assert(nr == arraysize);
rc = 1;
out:
return rc;
}
static int libxl__hotplug_disk(libxl__gc *gc, libxl__device *dev,
char ***args, char ***env,
libxl__device_action action)
{
char *be_path = libxl__device_backend_path(gc, dev);
char *script;
int nr = 0, rc;
script = libxl__xs_read(gc, XBT_NULL,
GCSPRINTF("%s/%s", be_path, "script"));
if (!script) {
LOGEVD(ERROR, errno, dev->domid,
"unable to read script from %s", be_path);
rc = ERROR_FAIL;
goto out;
}
const int arraysize = 4;
GCNEW_ARRAY(*args, arraysize);
(*args)[nr++] = script;
(*args)[nr++] = be_path;
(*args)[nr++] = (char *) libxl__device_action_to_string(action);
(*args)[nr++] = NULL;
assert(nr == arraysize);
rc = 1;
out:
return rc;
}
int libxl__get_hotplug_script_info(libxl__gc *gc, libxl__device *dev,
char ***args, char ***env,
libxl__device_action action,
int num_exec)
{
int rc;
switch (dev->backend_kind) {
case LIBXL__DEVICE_KIND_VIF:
/*
* If domain has a stubdom we don't have to execute hotplug scripts
* for emulated interfaces
*/
if ((num_exec > 1) ||
(libxl_get_stubdom_id(CTX, dev->domid) && num_exec)) {
rc = 0;
goto out;
}
rc = libxl__hotplug_nic(gc, dev, args, env, action, num_exec);
break;
case LIBXL__DEVICE_KIND_VBD:
if (num_exec != 0) {
rc = 0;
goto out;
}
rc = libxl__hotplug_disk(gc, dev, args, env, action);
break;
default:
/* No need to execute any hotplug scripts */
rc = 0;
break;
}
out:
return rc;
}
int libxl__pci_numdevs(libxl__gc *gc)
{
return ERROR_NI;
}
int libxl__pci_topology_init(libxl__gc *gc,
physdev_pci_device_t *devs,
int num_devs)
{
return ERROR_NI;
}
int libxl__local_dm_preexec_restrict(libxl__gc *gc)
{
return 0;
}
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