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qemu-e2k/include/hw/qdev-properties.h
Markus Armbruster 25f8dd9659 qdev: Don't exit when running into bad -global 
-global lets you set a nice booby-trap for yourself:

    $ qemu-system-x86_64 -nodefaults -S -display none -usb -monitor stdio -global usb-mouse.usb_version=l
    QEMU 2.1.94 monitor - type 'help' for more information
    (qemu) device_add usb-mouse
    Parameter 'usb_version' expects an int64 value or range
    $ echo $?
    1

Not nice.  Until commit 3196270 we even abort()ed.

The same error triggers if you manage to screw up a machine type's
compat_props.  To demonstrate, change HW_COMPAT_2_1's entry to

            .driver   = "usb-mouse",\
            .property = "usb_version",\
            .value    = "1", \

Then run

    $ qemu-system-x86_64 -usb -M pc-i440fx-2.1 -device usb-mouse
    upstream-qemu: -device usb-mouse: Parameter 'usb_version' expects an int64 value or range
    $ echo $?
    1

One of our creatively cruel error messages.

Since this is actually a coding error, we *should* abort() here.
Replace the error by an assertion failure in this case.

But turn the fatal error into a mere warning when the faulty
GlobalProperty comes from the user.  Looks like this:

    $ qemu-system-x86_64 -nodefaults -S -display none -usb -monitor stdio -global usb-mouse.usb_version=l
    QEMU 2.1.94 monitor - type 'help' for more information
    (qemu) device_add usb-mouse
    Warning: global usb-mouse.usb_version=l ignored (Parameter 'usb_version' expects an int64 value or range)
    (qemu)

This is consistent with how we handle similarly unusable -global in
qdev_prop_check_globals().

You could argue that the error should make device_add fail.  Would be
harder, because we're running within TypeInfo's instance_post_init()
method device_post_init(), which can't fail.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
2015-02-26 12:42:18 +01:00

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#ifndef QEMU_QDEV_PROPERTIES_H
#define QEMU_QDEV_PROPERTIES_H
#include "hw/qdev-core.h"
/*** qdev-properties.c ***/
extern PropertyInfo qdev_prop_bit;
extern PropertyInfo qdev_prop_bool;
extern PropertyInfo qdev_prop_uint8;
extern PropertyInfo qdev_prop_uint16;
extern PropertyInfo qdev_prop_uint32;
extern PropertyInfo qdev_prop_int32;
extern PropertyInfo qdev_prop_uint64;
extern PropertyInfo qdev_prop_size;
extern PropertyInfo qdev_prop_string;
extern PropertyInfo qdev_prop_chr;
extern PropertyInfo qdev_prop_ptr;
extern PropertyInfo qdev_prop_macaddr;
extern PropertyInfo qdev_prop_losttickpolicy;
extern PropertyInfo qdev_prop_bios_chs_trans;
extern PropertyInfo qdev_prop_drive;
extern PropertyInfo qdev_prop_netdev;
extern PropertyInfo qdev_prop_vlan;
extern PropertyInfo qdev_prop_pci_devfn;
extern PropertyInfo qdev_prop_blocksize;
extern PropertyInfo qdev_prop_pci_host_devaddr;
extern PropertyInfo qdev_prop_arraylen;
#define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
.name = (_name), \
.info = &(_prop), \
.offset = offsetof(_state, _field) \
+ type_check(_type, typeof_field(_state, _field)), \
}
#define DEFINE_PROP_DEFAULT(_name, _state, _field, _defval, _prop, _type) { \
.name = (_name), \
.info = &(_prop), \
.offset = offsetof(_state, _field) \
+ type_check(_type,typeof_field(_state, _field)), \
.qtype = QTYPE_QINT, \
.defval = (_type)_defval, \
}
#define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval) { \
.name = (_name), \
.info = &(qdev_prop_bit), \
.bitnr = (_bit), \
.offset = offsetof(_state, _field) \
+ type_check(uint32_t,typeof_field(_state, _field)), \
.qtype = QTYPE_QBOOL, \
.defval = (bool)_defval, \
}
#define DEFINE_PROP_BOOL(_name, _state, _field, _defval) { \
.name = (_name), \
.info = &(qdev_prop_bool), \
.offset = offsetof(_state, _field) \
+ type_check(bool, typeof_field(_state, _field)), \
.qtype = QTYPE_QBOOL, \
.defval = (bool)_defval, \
}
#define PROP_ARRAY_LEN_PREFIX "len-"
/**
* DEFINE_PROP_ARRAY:
* @_name: name of the array
* @_state: name of the device state structure type
* @_field: uint32_t field in @_state to hold the array length
* @_arrayfield: field in @_state (of type '@_arraytype *') which
* will point to the array
* @_arrayprop: PropertyInfo defining what property the array elements have
* @_arraytype: C type of the array elements
*
* Define device properties for a variable-length array _name. A
* static property "len-arrayname" is defined. When the device creator
* sets this property to the desired length of array, further dynamic
* properties "arrayname[0]", "arrayname[1]", ... are defined so the
* device creator can set the array element values. Setting the
* "len-arrayname" property more than once is an error.
*
* When the array length is set, the @_field member of the device
* struct is set to the array length, and @_arrayfield is set to point
* to (zero-initialised) memory allocated for the array. For a zero
* length array, @_field will be set to 0 and @_arrayfield to NULL.
* It is the responsibility of the device deinit code to free the
* @_arrayfield memory.
*/
#define DEFINE_PROP_ARRAY(_name, _state, _field, \
_arrayfield, _arrayprop, _arraytype) { \
.name = (PROP_ARRAY_LEN_PREFIX _name), \
.info = &(qdev_prop_arraylen), \
.offset = offsetof(_state, _field) \
+ type_check(uint32_t, typeof_field(_state, _field)), \
.qtype = QTYPE_QINT, \
.arrayinfo = &(_arrayprop), \
.arrayfieldsize = sizeof(_arraytype), \
.arrayoffset = offsetof(_state, _arrayfield), \
}
#define DEFINE_PROP_UINT8(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint8, uint8_t)
#define DEFINE_PROP_UINT16(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint16, uint16_t)
#define DEFINE_PROP_UINT32(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint32, uint32_t)
#define DEFINE_PROP_INT32(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_int32, int32_t)
#define DEFINE_PROP_UINT64(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint64, uint64_t)
#define DEFINE_PROP_SIZE(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_size, uint64_t)
#define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, int32_t)
/*
* Please avoid pointer properties. If you must use them, you must
* cover them in their device's class init function as follows:
*
* - If the property must be set, the device cannot be used with
* device_add, so add code like this:
* |* Reason: pointer property "NAME-OF-YOUR-PROP" *|
* DeviceClass *dc = DEVICE_CLASS(class);
* dc->cannot_instantiate_with_device_add_yet = true;
*
* - If the property may safely remain null, document it like this:
* |*
* * Note: pointer property "interrupt_vector" may remain null, thus
* * no need for dc->cannot_instantiate_with_device_add_yet = true;
* *|
*/
#define DEFINE_PROP_PTR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*)
#define DEFINE_PROP_CHR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*)
#define DEFINE_PROP_STRING(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
#define DEFINE_PROP_NETDEV(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, NICPeers)
#define DEFINE_PROP_VLAN(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, NICPeers)
#define DEFINE_PROP_DRIVE(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockBackend *)
#define DEFINE_PROP_MACADDR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
#define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_losttickpolicy, \
LostTickPolicy)
#define DEFINE_PROP_BIOS_CHS_TRANS(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_bios_chs_trans, int)
#define DEFINE_PROP_BLOCKSIZE(_n, _s, _f, _d) \
DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_blocksize, uint16_t)
#define DEFINE_PROP_PCI_HOST_DEVADDR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_pci_host_devaddr, PCIHostDeviceAddress)
#define DEFINE_PROP_END_OF_LIST() \
{}
/* Set properties between creation and init. */
void *qdev_get_prop_ptr(DeviceState *dev, Property *prop);
void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value);
void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value);
void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value);
void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value);
void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value);
void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value);
void qdev_prop_set_string(DeviceState *dev, const char *name, const char *value);
void qdev_prop_set_chr(DeviceState *dev, const char *name, CharDriverState *value);
void qdev_prop_set_netdev(DeviceState *dev, const char *name, NetClientState *value);
int qdev_prop_set_drive(DeviceState *dev, const char *name,
BlockBackend *value) QEMU_WARN_UNUSED_RESULT;
void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name,
BlockBackend *value);
void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value);
void qdev_prop_set_enum(DeviceState *dev, const char *name, int value);
/* FIXME: Remove opaque pointer properties. */
void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
void qdev_prop_register_global(GlobalProperty *prop);
void qdev_prop_register_global_list(GlobalProperty *props);
int qdev_prop_check_globals(void);
void qdev_prop_set_globals(DeviceState *dev);
void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
Property *prop, const char *value);
/**
* @qdev_property_add_static - add a @Property to a device referencing a
* field in a struct.
*/
void qdev_property_add_static(DeviceState *dev, Property *prop, Error **errp);
void qdev_alias_all_properties(DeviceState *target, Object *source);
/**
* @qdev_prop_set_after_realize:
* @dev: device
* @name: name of property
* @errp: indirect pointer to Error to be set
* Set the Error object to report that an attempt was made to set a property
* on a device after it has already been realized. This is a utility function
* which allows property-setter functions to easily report the error in
* a friendly format identifying both the device and the property.
*/
void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
Error **errp);
/**
* qdev_prop_allow_set_link_before_realize:
*
* Set the #Error object if an attempt is made to set the link after realize.
* This function should be used as the check() argument to
* object_property_add_link().
*/
void qdev_prop_allow_set_link_before_realize(Object *obj, const char *name,
Object *val, Error **errp);
#endif
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