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TOMOYO Linux Cross Reference
Linux/include/rdma/uverbs_named_ioctl.h

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  1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
  2 /*
  3  * Copyright (c) 2018, Mellanox Technologies inc.  All rights reserved.
  4  */
  5 
  6 #ifndef _UVERBS_NAMED_IOCTL_
  7 #define _UVERBS_NAMED_IOCTL_
  8 
  9 #include <rdma/uverbs_ioctl.h>
 10 
 11 #ifndef UVERBS_MODULE_NAME
 12 #error "Please #define UVERBS_MODULE_NAME before including rdma/uverbs_named_ioctl.h"
 13 #endif
 14 
 15 #define _UVERBS_PASTE(x, y)     x ## y
 16 #define _UVERBS_NAME(x, y)      _UVERBS_PASTE(x, y)
 17 #define UVERBS_METHOD(id)       _UVERBS_NAME(UVERBS_MODULE_NAME, _method_##id)
 18 #define UVERBS_HANDLER(id)      _UVERBS_NAME(UVERBS_MODULE_NAME, _handler_##id)
 19 #define UVERBS_OBJECT(id)       _UVERBS_NAME(UVERBS_MODULE_NAME, _object_##id)
 20 
 21 /* These are static so they do not need to be qualified */
 22 #define UVERBS_METHOD_ATTRS(method_id) _method_attrs_##method_id
 23 #define UVERBS_OBJECT_METHODS(object_id) _UVERBS_NAME(_object_methods_##object_id, __LINE__)
 24 
 25 #define DECLARE_UVERBS_NAMED_METHOD(_method_id, ...)                           \
 26         static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS(        \
 27                 _method_id)[] = { __VA_ARGS__ };                               \
 28         static const struct uverbs_method_def UVERBS_METHOD(_method_id) = {    \
 29                 .id = _method_id,                                              \
 30                 .handler = UVERBS_HANDLER(_method_id),                         \
 31                 .num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)),      \
 32                 .attrs = &UVERBS_METHOD_ATTRS(_method_id),                     \
 33         }
 34 
 35 /* Create a standard destroy method using the default handler. The handle_attr
 36  * argument must be the attribute specifying the handle to destroy, the
 37  * default handler does not support any other attributes.
 38  */
 39 #define DECLARE_UVERBS_NAMED_METHOD_DESTROY(_method_id, _handle_attr)          \
 40         static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS(        \
 41                 _method_id)[] = { _handle_attr };                              \
 42         static const struct uverbs_method_def UVERBS_METHOD(_method_id) = {    \
 43                 .id = _method_id,                                              \
 44                 .handler = uverbs_destroy_def_handler,                         \
 45                 .num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)),      \
 46                 .attrs = &UVERBS_METHOD_ATTRS(_method_id),                     \
 47         }
 48 
 49 #define DECLARE_UVERBS_NAMED_OBJECT(_object_id, _type_attrs, ...)              \
 50         static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS(    \
 51                 _object_id)[] = { __VA_ARGS__ };                               \
 52         static const struct uverbs_object_def UVERBS_OBJECT(_object_id) = {    \
 53                 .id = _object_id,                                              \
 54                 .type_attrs = &_type_attrs,                                    \
 55                 .num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)),  \
 56                 .methods = &UVERBS_OBJECT_METHODS(_object_id)                  \
 57         }
 58 
 59 /*
 60  * Declare global methods. These still have a unique object_id because we
 61  * identify all uapi methods with a (object,method) tuple. However, they have
 62  * no type pointer.
 63  */
 64 #define DECLARE_UVERBS_GLOBAL_METHODS(_object_id, ...)                         \
 65         static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS(    \
 66                 _object_id)[] = { __VA_ARGS__ };                               \
 67         static const struct uverbs_object_def UVERBS_OBJECT(_object_id) = {    \
 68                 .id = _object_id,                                              \
 69                 .num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)),  \
 70                 .methods = &UVERBS_OBJECT_METHODS(_object_id)                  \
 71         }
 72 
 73 /* Used by drivers to declare a complete parsing tree for new methods
 74  */
 75 #define ADD_UVERBS_METHODS(_name, _object_id, ...)                             \
 76         static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS(    \
 77                 _object_id)[] = { __VA_ARGS__ };                               \
 78         static const struct uverbs_object_def _name = {                        \
 79                 .id = _object_id,                                              \
 80                 .num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)),  \
 81                 .methods = &UVERBS_OBJECT_METHODS(_object_id)                  \
 82         };
 83 
 84 /* Used by drivers to declare a complete parsing tree for a single method that
 85  * differs only in having additional driver specific attributes.
 86  */
 87 #define ADD_UVERBS_ATTRIBUTES_SIMPLE(_name, _object_id, _method_id, ...)       \
 88         static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS(        \
 89                 _method_id)[] = { __VA_ARGS__ };                               \
 90         static const struct uverbs_method_def UVERBS_METHOD(_method_id) = {    \
 91                 .id = _method_id,                                              \
 92                 .num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)),      \
 93                 .attrs = &UVERBS_METHOD_ATTRS(_method_id),                     \
 94         };                                                                     \
 95         ADD_UVERBS_METHODS(_name, _object_id, &UVERBS_METHOD(_method_id))
 96 
 97 #endif
 98 

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