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virpcimock: Add PCI driver which always fails

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Such driver can be used to make sure PCI APIs fail properly.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Jiri Denemark 2014-01-16 14:05:19 +01:00
parent bbeadb820c
commit b803b29c1a
1 changed files with 21 additions and 12 deletions
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33
tests/virpcimock.c
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@ -107,11 +107,19 @@ char *fakesysfsdir;
*
*/
enum driverActions {
PCI_ACTION_BIND = 1 << 0,
PCI_ACTION_UNBIND = 1 << 1,
PCI_ACTION_NEW_ID = 1 << 2,
PCI_ACTION_REMOVE_ID = 1 << 3,
};
struct pciDriver {
char *name;
int *vendor; /* List of vendor:device IDs the driver can handle */
int *device;
size_t len; /* @len is used for both @vendor and @device */
unsigned int fail; /* Bitwise-OR of driverActions that should fail */
};
struct pciDevice {
@ -143,7 +151,7 @@ static void pci_device_new_from_stub(const struct pciDevice *data);
static struct pciDevice *pci_device_find_by_id(const char *id);
static struct pciDevice *pci_device_find_by_content(const char *path);
static void pci_driver_new(const char *name, ...);
static void pci_driver_new(const char *name, int fail, ...);
static struct pciDriver *pci_driver_find_by_dev(struct pciDevice *dev);
static struct pciDriver *pci_driver_find_by_path(const char *path);
static int pci_driver_bind(struct pciDriver *driver, struct pciDevice *dev);
@ -415,7 +423,7 @@ pci_device_autobind(struct pciDevice *dev)
* PCI Driver functions
*/
static void
pci_driver_new(const char *name, ...)
pci_driver_new(const char *name, int fail, ...)
{
struct pciDriver *driver;
va_list args;
@ -427,10 +435,12 @@ pci_driver_new(const char *name, ...)
virAsprintfQuiet(&driverpath, "%s/drivers/%s", fakesysfsdir, name) < 0)
ABORT_OOM();
driver->fail = fail;
if (virFileMakePath(driverpath) < 0)
ABORT("Unable to create: %s", driverpath);
va_start(args, name);
va_start(args, fail);
while ((vendor = va_arg(args, int)) != -1) {
if ((device = va_arg(args, int)) == -1)
@ -497,8 +507,8 @@ pci_driver_bind(struct pciDriver *driver,
int ret = -1;
char *devpath = NULL, *driverpath = NULL;
if (dev->driver) {
/* Device already bound */
if (dev->driver || PCI_ACTION_BIND & driver->fail) {
/* Device already bound or failing driver requested */
errno = ENODEV;
return ret;
}
@ -544,8 +554,8 @@ pci_driver_unbind(struct pciDriver *driver,
int ret = -1;
char *devpath = NULL, *driverpath = NULL;
if (dev->driver != driver) {
/* Device not bound to the @driver */
if (dev->driver != driver || PCI_ACTION_UNBIND & driver->fail) {
/* Device not bound to the @driver or failing driver used */
errno = ENODEV;
return ret;
}
@ -651,8 +661,7 @@ pci_driver_handle_new_id(const char *path)
int vendor, device;
char buf[32];
if (!driver) {
/* This should never happen (TM) */
if (!driver || PCI_ACTION_NEW_ID & driver->fail) {
errno = ENODEV;
goto cleanup;
}
@ -707,8 +716,7 @@ pci_driver_handle_remove_id(const char *path)
int vendor, device;
char buf[32];
if (!driver) {
/* This should never happen (TM) */
if (!driver || PCI_ACTION_REMOVE_ID & driver->fail) {
errno = ENODEV;
goto cleanup;
}
@ -785,11 +793,12 @@ init_env(void)
make_file(fakesysfsdir, "drivers_probe", NULL, -1);
# define MAKE_PCI_DRIVER(name, ...) \
pci_driver_new(name, __VA_ARGS__, -1, -1)
pci_driver_new(name, 0, __VA_ARGS__, -1, -1)
MAKE_PCI_DRIVER("iwlwifi", 0x8086, 0x0044);
MAKE_PCI_DRIVER("i915", 0x8086, 0x0046, 0x8086, 0x0047);
MAKE_PCI_DRIVER("pci-stub", -1, -1);
pci_driver_new("vfio-pci", PCI_ACTION_BIND, -1, -1);
# define MAKE_PCI_DEVICE(Id, Vendor, Device, ...) \
do { \