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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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