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https://github.com/xen-project/xen.git
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Manuel Bouyer
9e80a1e37b
NetBSD doesn't have setresuid(). introcuce libxl__setresuid(), which on NetBSD assert() that it's never called (it should not be called when dm restriction is off, and NetBSD doesn't support dm restriction at this time). On linux and FreeBSD it just calls setresuid(). Signed-off-by: Manuel Bouyer <bouyer@netbsd.org> Reviewed-by: Ian Jackson <ian.jackson@eu.citrix.com>
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
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* Copyright (C) 2011
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* Author Roger Pau Monne <roger.pau@entel.upc.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; version 2.1 only. with the special
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* exception on linking described in file LICENSE.
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*
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* This program 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
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* GNU Lesser General Public License for more details.
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*/
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#include "libxl_osdeps.h" /* must come before any other headers */
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#include "libxl_internal.h"
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int libxl__try_phy_backend(mode_t st_mode)
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{
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if (S_ISREG(st_mode) || S_ISBLK(st_mode))
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return 1;
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return 0;
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}
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char *libxl__devid_to_localdev(libxl__gc *gc, int devid)
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{
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/* TODO */
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return NULL;
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}
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/* Hotplug scripts caller functions */
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static int libxl__hotplug(libxl__gc *gc, libxl__device *dev, char ***args,
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libxl__device_action action)
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{
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char *be_path = libxl__device_backend_path(gc, dev);
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char *script;
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int nr = 0, rc = 0, arraysize = 4;
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script = libxl__xs_read(gc, XBT_NULL,
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GCSPRINTF("%s/%s", be_path, "script"));
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if (!script) {
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LOGEVD(ERROR, errno, dev->domid,
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"unable to read script from %s", be_path);
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rc = ERROR_FAIL;
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goto out;
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}
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GCNEW_ARRAY(*args, arraysize);
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(*args)[nr++] = script;
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(*args)[nr++] = be_path;
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(*args)[nr++] = GCSPRINTF("%d", action == LIBXL__DEVICE_ACTION_ADD ?
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XenbusStateInitWait : XenbusStateClosed);
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(*args)[nr++] = NULL;
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assert(nr == arraysize);
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out:
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return rc;
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}
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int libxl__get_hotplug_script_info(libxl__gc *gc, libxl__device *dev,
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char ***args, char ***env,
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libxl__device_action action,
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int num_exec)
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{
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int rc;
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switch (dev->backend_kind) {
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case LIBXL__DEVICE_KIND_VBD:
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if (num_exec != 0) {
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LOGD(DEBUG, dev->domid,
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"num_exec %d, not running hotplug scripts", num_exec);
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rc = 0;
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goto out;
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}
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rc = libxl__hotplug(gc, dev, args, action);
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if (!rc) rc = 1;
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break;
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case LIBXL__DEVICE_KIND_VIF:
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/*
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* If domain has a stubdom we don't have to execute hotplug scripts
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* for emulated interfaces
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*
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* NetBSD let QEMU call a script to plug emulated nic, so
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* only test if num_exec == 0 in that case.
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*/
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if ((num_exec != 0) ||
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(libxl_get_stubdom_id(CTX, dev->domid) && num_exec)) {
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LOGD(DEBUG, dev->domid,
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"num_exec %d, not running hotplug scripts", num_exec);
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rc = 0;
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goto out;
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}
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rc = libxl__hotplug(gc, dev, args, action);
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if (!rc) rc = 1;
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break;
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default:
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/* If no need to execute any hotplug scripts,
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* call the callback manually
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*/
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rc = 0;
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break;
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}
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out:
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return rc;
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}
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int libxl__pci_numdevs(libxl__gc *gc)
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{
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return ERROR_NI;
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}
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int libxl__pci_topology_init(libxl__gc *gc,
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physdev_pci_device_t *devs,
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int num_devs)
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{
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return ERROR_NI;
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}
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int libxl__local_dm_preexec_restrict(libxl__gc *gc)
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{
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return 0;
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}
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int libxl__setresuid(uid_t ruid, uid_t euid, uid_t suid)
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{
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assert(!"setresuid is not available on NetBSD, and dm restrction is not supported, so this code path should not have been reached");
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return -1;
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}
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