mirror of
https://gitlab.com/libvirt/libvirt.git
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9e4445ebc3
Some of our tests try to validate domain XMLs they are working with (not intentionally, simply because they call top level domain XML parse function). Anyway, this implies that we build domain capabilities also - see virQEMUDriverGetDomainCapabilities(). And since some domain XMLs are type of 'kvm' the control gets through virQEMUCapsFillDomainCaps() and virHostCPUGetKVMMaxVCPUs() to opening /dev/kvm which may be missing on the machine we're running 'make check'. Previously, we did not see this issue, because it was masked. If building domain capabilities failed for whatever reason, we ignored the failure. Only v5.9.0-207-gc69e6edea3 uncovered the problem (it changed reval from 0 to -1 if virQEMUDriverGetDomainCapabilities() fails). Since the referenced commit is correct, we need to mock access to /dev/kvm in our tests. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
377 lines
9.6 KiB
C
377 lines
9.6 KiB
C
/*
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* Copyright (C) 2011-2014 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 2.1 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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* License along with this library; If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include <time.h>
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#include <selinux/selinux.h>
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#include <selinux/context.h>
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#include <sys/xattr.h>
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#include "internal.h"
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#include "testutils.h"
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#include "testutilsqemu.h"
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#include "qemu/qemu_domain.h"
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#include "viralloc.h"
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#include "virerror.h"
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#include "virfile.h"
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#include "virlog.h"
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#include "security/security_manager.h"
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#include "virstring.h"
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#define VIR_FROM_THIS VIR_FROM_NONE
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VIR_LOG_INIT("tests.securityselinuxlabeltest");
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static virQEMUDriver driver;
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static virSecurityManagerPtr mgr;
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typedef struct testSELinuxFile testSELinuxFile;
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struct testSELinuxFile {
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char *file;
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char *context;
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};
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static int
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testUserXattrEnabled(void)
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{
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int ret = -1;
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ssize_t len;
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const char *con_value = "system_u:object_r:svirt_image_t:s0:c41,c264";
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char *path = NULL;
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path = g_strdup_printf("%s/securityselinuxlabeldata/testxattr", abs_builddir);
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if (virFileMakePath(abs_builddir "/securityselinuxlabeldata") < 0 ||
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virFileTouch(path, 0600) < 0)
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goto cleanup;
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len = setxattr(path, "user.libvirt.selinux", con_value,
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strlen(con_value), 0);
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if (len < 0) {
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if (errno == EOPNOTSUPP)
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ret = 0;
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goto cleanup;
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}
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ret = 1;
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cleanup:
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unlink(path);
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rmdir(abs_builddir "/securityselinuxlabeldata");
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VIR_FREE(path);
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return ret;
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}
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static int
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testSELinuxMungePath(char **path)
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{
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char *tmp;
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tmp = g_strdup_printf("%s/securityselinuxlabeldata%s", abs_builddir, *path);
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VIR_FREE(*path);
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*path = tmp;
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return 0;
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}
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static int
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testSELinuxLoadFileList(const char *testname,
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testSELinuxFile **files,
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size_t *nfiles)
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{
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int ret = -1;
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char *path = NULL;
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FILE *fp = NULL;
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char *line = NULL;
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*files = NULL;
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*nfiles = 0;
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path = g_strdup_printf("%s/securityselinuxlabeldata/%s.txt", abs_srcdir,
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testname);
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if (!(fp = fopen(path, "r")))
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goto cleanup;
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if (VIR_ALLOC_N(line, 1024) < 0)
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goto cleanup;
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while (!feof(fp)) {
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char *file = NULL, *context = NULL, *tmp;
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if (!fgets(line, 1024, fp)) {
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if (!feof(fp))
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goto cleanup;
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break;
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}
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tmp = strchr(line, ';');
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if (!tmp) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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"unexpected format for line '%s'",
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line);
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goto cleanup;
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}
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*tmp = '\0';
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tmp++;
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file = g_strdup_printf("%s/securityselinuxlabeldata%s", abs_builddir,
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line);
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if (*tmp != '\0' && *tmp != '\n') {
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context = g_strdup(tmp);
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tmp = strchr(context, '\n');
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if (tmp)
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*tmp = '\0';
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}
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if (VIR_EXPAND_N(*files, *nfiles, 1) < 0) {
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VIR_FREE(file);
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VIR_FREE(context);
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goto cleanup;
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}
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(*files)[(*nfiles)-1].file = file;
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(*files)[(*nfiles)-1].context = context;
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}
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ret = 0;
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cleanup:
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VIR_FORCE_FCLOSE(fp);
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VIR_FREE(path);
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VIR_FREE(line);
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return ret;
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}
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static virDomainDefPtr
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testSELinuxLoadDef(const char *testname)
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{
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char *xmlfile = NULL;
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virDomainDefPtr def = NULL;
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size_t i;
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xmlfile = g_strdup_printf("%s/securityselinuxlabeldata/%s.xml", abs_srcdir,
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testname);
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if (!(def = virDomainDefParseFile(xmlfile, driver.caps, driver.xmlopt,
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NULL, 0)))
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goto cleanup;
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for (i = 0; i < def->ndisks; i++) {
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if (def->disks[i]->src->type != VIR_STORAGE_TYPE_FILE &&
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def->disks[i]->src->type != VIR_STORAGE_TYPE_BLOCK)
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continue;
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if (testSELinuxMungePath(&def->disks[i]->src->path) < 0)
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goto cleanup;
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}
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for (i = 0; i < def->nserials; i++) {
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if (def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_FILE &&
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def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_PIPE &&
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def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_DEV &&
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def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_UNIX)
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continue;
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if (def->serials[i]->source->type == VIR_DOMAIN_CHR_TYPE_UNIX) {
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if (testSELinuxMungePath(&def->serials[i]->source->data.nix.path) < 0)
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goto cleanup;
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} else {
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if (testSELinuxMungePath(&def->serials[i]->source->data.file.path) < 0)
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goto cleanup;
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}
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}
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if (def->os.kernel &&
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testSELinuxMungePath(&def->os.kernel) < 0)
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goto cleanup;
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if (def->os.initrd &&
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testSELinuxMungePath(&def->os.initrd) < 0)
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goto cleanup;
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cleanup:
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VIR_FREE(xmlfile);
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return def;
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}
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static int
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testSELinuxCreateDisks(testSELinuxFile *files, size_t nfiles)
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{
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size_t i;
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if (virFileMakePath(abs_builddir "/securityselinuxlabeldata/nfs") < 0)
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return -1;
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for (i = 0; i < nfiles; i++) {
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if (virFileTouch(files[i].file, 0600) < 0)
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return -1;
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}
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return 0;
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}
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static int
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testSELinuxDeleteDisks(testSELinuxFile *files, size_t nfiles)
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{
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size_t i;
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for (i = 0; i < nfiles; i++) {
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if (unlink(files[i].file) < 0)
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return -1;
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}
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if (rmdir(abs_builddir "/securityselinuxlabeldata/nfs") < 0)
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return -1;
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/* Ignore failure to remove non-empty directory with in-tree build */
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rmdir(abs_builddir "/securityselinuxlabeldata");
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return 0;
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}
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static int
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testSELinuxCheckLabels(testSELinuxFile *files, size_t nfiles)
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{
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size_t i;
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security_context_t ctx;
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for (i = 0; i < nfiles; i++) {
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ctx = NULL;
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if (getfilecon(files[i].file, &ctx) < 0) {
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if (errno == ENODATA) {
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/* nothing to do */
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} else if (errno == EOPNOTSUPP) {
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ctx = g_strdup("EOPNOTSUPP");
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} else {
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virReportSystemError(errno,
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"Cannot read label on %s",
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files[i].file);
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return -1;
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}
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}
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if (STRNEQ_NULLABLE(files[i].context, ctx)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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"File %s context '%s' did not match expected '%s'",
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files[i].file, ctx, files[i].context);
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VIR_FREE(ctx);
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return -1;
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}
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VIR_FREE(ctx);
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}
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return 0;
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}
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static int
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testSELinuxLabeling(const void *opaque)
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{
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const char *testname = opaque;
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int ret = -1;
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testSELinuxFile *files = NULL;
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size_t nfiles = 0;
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size_t i;
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virDomainDefPtr def = NULL;
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if (testSELinuxLoadFileList(testname, &files, &nfiles) < 0)
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goto cleanup;
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if (testSELinuxCreateDisks(files, nfiles) < 0)
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goto cleanup;
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if (!(def = testSELinuxLoadDef(testname)))
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goto cleanup;
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if (virSecurityManagerSetAllLabel(mgr, def, NULL, false, false) < 0)
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goto cleanup;
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if (testSELinuxCheckLabels(files, nfiles) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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if (testSELinuxDeleteDisks(files, nfiles) < 0)
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VIR_WARN("unable to fully clean up");
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virDomainDefFree(def);
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for (i = 0; i < nfiles; i++) {
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VIR_FREE(files[i].file);
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VIR_FREE(files[i].context);
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}
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VIR_FREE(files);
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if (ret < 0)
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VIR_TEST_VERBOSE("%s", virGetLastErrorMessage());
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return ret;
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}
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static int
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mymain(void)
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{
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int ret = 0;
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int rc = testUserXattrEnabled();
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g_autoptr(virQEMUCaps) qemuCaps = NULL;
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if (rc < 0)
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return EXIT_FAILURE;
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if (!rc)
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return EXIT_AM_SKIP;
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if (!(mgr = virSecurityManagerNew("selinux", "QEMU",
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VIR_SECURITY_MANAGER_DEFAULT_CONFINED |
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VIR_SECURITY_MANAGER_PRIVILEGED))) {
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VIR_TEST_VERBOSE("Unable to initialize security driver: %s",
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virGetLastErrorMessage());
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return EXIT_FAILURE;
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}
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if (qemuTestDriverInit(&driver) < 0)
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return EXIT_FAILURE;
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if (!(qemuCaps = virQEMUCapsNew()))
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return EXIT_FAILURE;
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virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE_CIRRUS_VGA);
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if (qemuTestCapsCacheInsert(driver.qemuCapsCache, qemuCaps) < 0)
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return EXIT_FAILURE;
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#define DO_TEST_LABELING(name) \
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if (virTestRun("Labelling " # name, testSELinuxLabeling, name) < 0) \
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ret = -1;
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setcon((security_context_t)"system_r:system_u:libvirtd_t:s0:c0.c1023");
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DO_TEST_LABELING("disks");
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DO_TEST_LABELING("kernel");
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DO_TEST_LABELING("chardev");
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DO_TEST_LABELING("nfs");
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qemuTestDriverFree(&driver);
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return (ret == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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VIR_TEST_MAIN_PRELOAD(mymain,
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VIR_TEST_MOCK("domaincaps"),
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abs_builddir "/.libs/libsecurityselinuxhelper.so")
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