Validate the schema that the PF driver passed to us

Differential Revision:	https://reviews.freebsd.org/D90
Reviewed by:		emaste
MFC after: 		1 month
Sponsored by:		Sandvine Inc.
This commit is contained in:
rstone 2015-03-01 00:59:28 +00:00
parent 65800eac29
commit e19abb6b58
3 changed files with 274 additions and 7 deletions

View File

@ -142,6 +142,10 @@ pci_iov_attach_method(device_t bus, device_t dev, nvlist_t *pf_schema,
error = ENOMEM;
goto cleanup;
}
error = pci_iov_validate_schema(schema);
if (error != 0)
goto cleanup;
iov->iov_schema = schema;
iov->iov_cdev = make_dev(&iov_cdevsw, device_get_unit(dev),

View File

@ -50,26 +50,66 @@ __FBSDID("$FreeBSD$");
struct config_type_validator;
typedef int (validate_func)(const struct config_type_validator *,
const nvlist_t *, const char *name);
typedef int (default_validate_t)(const struct config_type_validator *,
const nvlist_t *);
static validate_func pci_iov_schema_validate_bool;
static validate_func pci_iov_schema_validate_string;
static validate_func pci_iov_schema_validate_uint;
static validate_func pci_iov_schema_validate_unicast_mac;
static default_validate_t pci_iov_validate_bool_default;
static default_validate_t pci_iov_validate_string_default;
static default_validate_t pci_iov_validate_uint_default;
static default_validate_t pci_iov_validate_unicast_mac_default;
struct config_type_validator {
const char *type_name;
validate_func *validate;
default_validate_t *default_validate;
uintmax_t limit;
};
static struct config_type_validator pci_iov_schema_validators[] = {
{ "bool", pci_iov_schema_validate_bool },
{ "string", pci_iov_schema_validate_string },
{ "uint8_t", pci_iov_schema_validate_uint, UINT8_MAX },
{ "uint16_t", pci_iov_schema_validate_uint, UINT16_MAX },
{ "uint32_t", pci_iov_schema_validate_uint, UINT32_MAX },
{ "uint64_t", pci_iov_schema_validate_uint, UINT64_MAX },
{ "unicast-mac", pci_iov_schema_validate_unicast_mac },
{
.type_name = "bool",
.validate = pci_iov_schema_validate_bool,
.default_validate = pci_iov_validate_bool_default
},
{
.type_name = "string",
.validate = pci_iov_schema_validate_string,
.default_validate = pci_iov_validate_string_default
},
{
.type_name = "uint8_t",
.validate = pci_iov_schema_validate_uint,
.default_validate = pci_iov_validate_uint_default,
.limit = UINT8_MAX
},
{
.type_name = "uint16_t",
.validate = pci_iov_schema_validate_uint,
.default_validate = pci_iov_validate_uint_default,
.limit = UINT16_MAX
},
{
.type_name = "uint32_t",
.validate = pci_iov_schema_validate_uint,
.default_validate = pci_iov_validate_uint_default,
.limit = UINT32_MAX
},
{
.type_name = "uint64_t",
.validate = pci_iov_schema_validate_uint,
.default_validate = pci_iov_validate_uint_default,
.limit = UINT64_MAX
},
{
.type_name = "unicast-mac",
.validate = pci_iov_schema_validate_unicast_mac,
.default_validate = pci_iov_validate_unicast_mac_default,
},
};
static const struct config_type_validator *
@ -309,6 +349,227 @@ pci_iov_config_add_default(const nvlist_t *param_schema, const char *name,
panic("Unexpected nvlist type");
}
static int
pci_iov_validate_bool_default(const struct config_type_validator * validator,
const nvlist_t *param)
{
if (!nvlist_exists_bool(param, DEFAULT_SCHEMA_NAME))
return (EINVAL);
return (0);
}
static int
pci_iov_validate_string_default(const struct config_type_validator * validator,
const nvlist_t *param)
{
if (!nvlist_exists_string(param, DEFAULT_SCHEMA_NAME))
return (EINVAL);
return (0);
}
static int
pci_iov_validate_uint_default(const struct config_type_validator * validator,
const nvlist_t *param)
{
uint64_t defaultVal;
if (!nvlist_exists_number(param, DEFAULT_SCHEMA_NAME))
return (EINVAL);
defaultVal = nvlist_get_number(param, DEFAULT_SCHEMA_NAME);
if (defaultVal > validator->limit)
return (EINVAL);
return (0);
}
static int
pci_iov_validate_unicast_mac_default(
const struct config_type_validator * validator, const nvlist_t *param)
{
const uint8_t *mac;
size_t size;
if (!nvlist_exists_binary(param, DEFAULT_SCHEMA_NAME))
return (EINVAL);
mac = nvlist_get_binary(param, DEFAULT_SCHEMA_NAME, &size);
if (size != ETHER_ADDR_LEN)
return (EINVAL);
if (ETHER_IS_MULTICAST(mac))
return (EINVAL);
return (0);
}
static int
pci_iov_validate_param_schema(const nvlist_t *schema)
{
const struct config_type_validator *validator;
const char *type;
int error;
/* All parameters must define a type. */
if (!nvlist_exists_string(schema, TYPE_SCHEMA_NAME))
return (EINVAL);
type = nvlist_get_string(schema, TYPE_SCHEMA_NAME);
validator = pci_iov_schema_find_validator(type);
if (validator == NULL)
return (EINVAL);
/* Validate that the default value conforms to the type. */
if (nvlist_exists(schema, DEFAULT_SCHEMA_NAME)) {
error = validator->default_validate(validator, schema);
if (error != 0)
return (error);
/* Required and Default are mutually exclusive. */
if (nvlist_exists(schema, REQUIRED_SCHEMA_NAME))
return (EINVAL);
}
/* The "Required" field must be a bool. */
if (nvlist_exists(schema, REQUIRED_SCHEMA_NAME)) {
if (!nvlist_exists_bool(schema, REQUIRED_SCHEMA_NAME))
return (EINVAL);
}
return (0);
}
static int
pci_iov_validate_subsystem_schema(const nvlist_t *dev_schema, const char *name)
{
const nvlist_t *sub_schema, *param_schema;
const char *param_name;
void *it;
int type, error;
if (!nvlist_exists_nvlist(dev_schema, name))
return (EINVAL);
sub_schema = nvlist_get_nvlist(dev_schema, name);
it = NULL;
while ((param_name = nvlist_next(sub_schema, &type, &it)) != NULL) {
if (type != NV_TYPE_NVLIST)
return (EINVAL);
param_schema = nvlist_get_nvlist(sub_schema, param_name);
error = pci_iov_validate_param_schema(param_schema);
if (error != 0)
return (error);
}
return (0);
}
/*
* Validate that the driver schema does not define any configuration parameters
* whose names collide with configuration parameters defined in the iov schema.
*/
static int
pci_iov_validate_param_collisions(const nvlist_t *dev_schema)
{
const nvlist_t *iov_schema, *driver_schema;
const char *name;
void *it;
int type;
driver_schema = nvlist_get_nvlist(dev_schema, DRIVER_CONFIG_NAME);
iov_schema = nvlist_get_nvlist(dev_schema, IOV_CONFIG_NAME);
it = NULL;
while ((name = nvlist_next(driver_schema, &type, &it)) != NULL) {
if (nvlist_exists(iov_schema, name))
return (EINVAL);
}
return (0);
}
/*
* Validate that we only have IOV and DRIVER subsystems beneath the given
* device schema node.
*/
static int
pci_iov_validate_schema_subsystems(const nvlist_t *dev_schema)
{
const char *name;
void *it;
int type;
it = NULL;
while ((name = nvlist_next(dev_schema, &type, &it)) != NULL) {
if (strcmp(name, IOV_CONFIG_NAME) != 0 &&
strcmp(name, DRIVER_CONFIG_NAME) != 0)
return (EINVAL);
}
return (0);
}
static int
pci_iov_validate_device_schema(const nvlist_t *schema, const char *name)
{
const nvlist_t *dev_schema;
int error;
if (!nvlist_exists_nvlist(schema, name))
return (EINVAL);
dev_schema = nvlist_get_nvlist(schema, name);
error = pci_iov_validate_subsystem_schema(dev_schema, IOV_CONFIG_NAME);
if (error != 0)
return (error);
error = pci_iov_validate_subsystem_schema(dev_schema,
DRIVER_CONFIG_NAME);
if (error != 0)
return (error);
error = pci_iov_validate_param_collisions(dev_schema);
if (error != 0)
return (error);
return (pci_iov_validate_schema_subsystems(dev_schema));
}
/* Validate that we only have PF and VF devices beneath the top-level schema. */
static int
pci_iov_validate_schema_devices(const nvlist_t *dev_schema)
{
const char *name;
void *it;
int type;
it = NULL;
while ((name = nvlist_next(dev_schema, &type, &it)) != NULL) {
if (strcmp(name, PF_CONFIG_NAME) != 0 &&
strcmp(name, VF_SCHEMA_NAME) != 0)
return (EINVAL);
}
return (0);
}
int
pci_iov_validate_schema(const nvlist_t *schema)
{
int error;
error = pci_iov_validate_device_schema(schema, PF_CONFIG_NAME);
if (error != 0)
return (error);
error = pci_iov_validate_device_schema(schema, VF_SCHEMA_NAME);
if (error != 0)
return (error);
return (pci_iov_validate_schema_devices(schema));
}
/*
* Validate that all required parameters from the schema are specified in the
* config. If any parameter with a default value is not specified in the

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@ -29,6 +29,8 @@
#ifndef _SCHEMA_PRIVATE_H_
#define _SCHEMA_PRIVATE_H_
int pci_iov_validate_schema(const nvlist_t *schema);
int pci_iov_schema_validate_config(const nvlist_t *, nvlist_t *);
uint16_t pci_iov_config_get_num_vfs(const nvlist_t *);