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libvirt/tests/scsihosttest.c
Andrea Bolognani 87b30e6965 tests: Move fakerootdir handling to common logic 
Instead of having each test manually initialize and cleanup
its own fakerootdir, do that as part of the common test
initialization logic in virTestMain().

In most cases we can simply drop the relevant code from the
test program, but scsihosttest uses the value of fakerootdir
as a starting point to build another path, so we need to do
things slightly differently. In order to keep things working,
we retrieve the value from the LIBVIRT_FAKE_ROOT_DIR
environment variable, same as all the mock libraries are
already doing.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
2023-03-03 13:52:37 +01:00

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/*
* Copyright (C) 2014 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 2.1 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, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include "testutils.h"
#ifdef __linux__
# include <fcntl.h>
# include <sys/stat.h>
# include <unistd.h>
# include "virlog.h"
# include "virscsihost.h"
# define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("tests.scsihosttest");
char *scsihost_class_path;
# define TEST_SCSIHOST_CLASS_PATH scsihost_class_path
/*
* Initialized/create a mock sysfs environment with 4 scsi_host devices
* located on "0000:00:1f.1" and "0000:00:1f.2". Each directory will
* contain 4 unique_id files having the same value.
*
* The environment is:
*
* 4 files:
*
* sys/devices/pci0000:00/0000:00:1f.1/ata1/host0/scsi_host/host0/unique_id
* sys/devices/pci0000:00/0000:00:1f.1/ata2/host1/scsi_host/host1/unique_id
* sys/devices/pci0000:00/0000:00:1f.2/ata1/host0/scsi_host/host0/unique_id
* sys/devices/pci0000:00/0000:00:1f.2/ata2/host1/scsi_host/host1/unique_id
*
* 4 symlinks:
*
* sys/class/scsi_host/host0 -> link to 1f.1 host 0
* sys/class/scsi_host/host1 -> link to 1f.1 host 1
* sys/class/scsi_host/host2 -> link to 1f.2 host 0
* sys/class/scsi_host/host3 -> link to 1f.2 host 1
*
* The unique_id's for host0 and host2 are set to "1"
* The unique_id's for host1 and host3 are set to "2"
*/
static int
create_scsihost(const char *fakesysfsdir, const char *devicepath,
const char *unique_id, const char *hostname)
{
g_autofree char *unique_id_path = NULL;
g_autofree char *link_path = NULL;
char *spot;
VIR_AUTOCLOSE fd = -1;
unique_id_path = g_strdup_printf("%s/devices/pci0000:00/%s/unique_id",
fakesysfsdir, devicepath);
link_path = g_strdup_printf("%s/class/scsi_host/%s",
fakesysfsdir, hostname);
/* Rather than create path & file, temporarily snip off the file to
* create the path
*/
if (!(spot = strstr(unique_id_path, "unique_id"))) {
fprintf(stderr, "Did not find unique_id in path\n");
return -1;
}
spot--;
*spot = '\0';
if (g_mkdir_with_parents(unique_id_path, 0755) < 0) {
fprintf(stderr, "Unable to make path to '%s'\n", unique_id_path);
return -1;
}
*spot = '/';
/* Rather than create path & file, temporarily snip off the file to
* create the path
*/
if (!(spot = strstr(link_path, hostname))) {
fprintf(stderr, "Did not find hostname in path\n");
return -1;
}
spot--;
*spot = '\0';
if (g_mkdir_with_parents(link_path, 0755) < 0) {
fprintf(stderr, "Unable to make path to '%s'\n", link_path);
return -1;
}
*spot = '/';
if ((fd = open(unique_id_path, O_CREAT|O_WRONLY, 0444)) < 0) {
fprintf(stderr, "Unable to create '%s'\n", unique_id_path);
return -1;
}
if (safewrite(fd, unique_id, 1) != 1) {
fprintf(stderr, "Unable to write '%s'\n", unique_id);
return -1;
}
VIR_DEBUG("Created unique_id '%s'", unique_id_path);
/* The link is to the path not the file - so remove the file */
if (!(spot = strstr(unique_id_path, "unique_id"))) {
fprintf(stderr, "Did not find unique_id in path\n");
return -1;
}
spot--;
*spot = '\0';
if (symlink(unique_id_path, link_path) < 0) {
fprintf(stderr, "Unable to create symlink '%s' to '%s'\n",
link_path, unique_id_path);
return -1;
}
VIR_DEBUG("Created symlink '%s'", link_path);
return 0;
}
static int
init_scsihost_sysfs(const char *fakesysfsdir)
{
int ret = 0;
if (create_scsihost(fakesysfsdir,
"0000:00:1f.1/ata1/host0/scsi_host/host0",
"1", "host0") < 0 ||
create_scsihost(fakesysfsdir,
"0000:00:1f.1/ata2/host1/scsi_host/host1",
"2", "host1") < 0 ||
create_scsihost(fakesysfsdir,
"0000:00:1f.2/ata1/host0/scsi_host/host0",
"1", "host2") < 0 ||
create_scsihost(fakesysfsdir,
"0000:00:1f.2/ata2/host1/scsi_host/host1",
"2", "host3") < 0)
ret = -1;
return ret;
}
/* Test virReadSCSIUniqueId */
static int
testVirReadSCSIUniqueId(const void *data G_GNUC_UNUSED)
{
int hostnum, unique_id;
for (hostnum = 0; hostnum < 4; hostnum++) {
if ((unique_id = virSCSIHostGetUniqueId(TEST_SCSIHOST_CLASS_PATH,
hostnum)) < 0) {
fprintf(stderr, "Failed to read hostnum=%d unique_id\n", hostnum);
return -1;
}
/* host0 and host2 have unique_id == 1
* host1 and host3 have unique_id == 2
*/
if ((hostnum == 0 || hostnum == 2) && unique_id != 1) {
fprintf(stderr, "The unique_id='%d' for hostnum=%d is wrong\n",
unique_id, hostnum);
return -1;
} else if ((hostnum == 1 || hostnum == 3) && unique_id != 2) {
fprintf(stderr, "The unique_id='%d' for hostnum=%d is wrong\n",
unique_id, hostnum);
return -1;
}
}
return 0;
}
/* Test virSCSIHostFindByPCI */
static int
testVirFindSCSIHostByPCI(const void *data G_GNUC_UNUSED)
{
unsigned int unique_id1 = 1;
unsigned int unique_id2 = 2;
const char *pci_addr1 = "0000:00:1f.1";
const char *pci_addr2 = "0000:00:1f.2";
char *ret_host = NULL;
int ret = -1;
if (!(ret_host = virSCSIHostFindByPCI(TEST_SCSIHOST_CLASS_PATH,
pci_addr1, unique_id1)) ||
STRNEQ(ret_host, "host0"))
goto cleanup;
VIR_FREE(ret_host);
if (!(ret_host = virSCSIHostFindByPCI(TEST_SCSIHOST_CLASS_PATH,
pci_addr1, unique_id2)) ||
STRNEQ(ret_host, "host1"))
goto cleanup;
VIR_FREE(ret_host);
if (!(ret_host = virSCSIHostFindByPCI(TEST_SCSIHOST_CLASS_PATH,
pci_addr2, unique_id1)) ||
STRNEQ(ret_host, "host2"))
goto cleanup;
VIR_FREE(ret_host);
if (!(ret_host = virSCSIHostFindByPCI(TEST_SCSIHOST_CLASS_PATH,
pci_addr2, unique_id2)) ||
STRNEQ(ret_host, "host3"))
goto cleanup;
VIR_FREE(ret_host);
ret = 0;
cleanup:
VIR_FREE(ret_host);
return ret;
}
static int
mymain(void)
{
int ret = -1;
const char *fakerootdir = NULL;
g_autofree char *fakesysfsdir = NULL;
if (!(fakerootdir = g_getenv("LIBVIRT_FAKE_ROOT_DIR")))
return EXIT_FAILURE;
fakesysfsdir = g_strdup_printf("%s/sys", fakerootdir);
if (init_scsihost_sysfs(fakesysfsdir) < 0) {
fprintf(stderr, "Failed to create fakesysfs='%s'\n", fakesysfsdir);
goto cleanup;
}
scsihost_class_path = g_strdup_printf("%s/class/scsi_host", fakesysfsdir);
VIR_DEBUG("Reading from '%s'", scsihost_class_path);
if (virTestRun("testVirReadSCSIUniqueId",
testVirReadSCSIUniqueId, NULL) < 0) {
ret = -1;
goto cleanup;
}
if (virTestRun("testVirFindSCSIHostByPCI",
testVirFindSCSIHostByPCI, NULL) < 0) {
ret = -1;
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(scsihost_class_path);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
VIR_TEST_MAIN(mymain)
#else
int
main(void)
{
return EXIT_AM_SKIP;
}
#endif
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