128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Stage 5 definitions for creating trace events */
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/*
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* remember the offset of each array from the beginning of the event.
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*/
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#undef __entry
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#define __entry entry
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#ifndef __STAGE5_STRING_SRC_H
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#define __STAGE5_STRING_SRC_H
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static inline const char *__string_src(const char *str)
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{
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if (!str)
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return EVENT_NULL_STR;
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return str;
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}
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#endif /* __STAGE5_STRING_SRC_H */
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/*
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* Fields should never declare an array: i.e. __field(int, arr[5])
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* If they do, it will cause issues in parsing and possibly corrupt the
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* events. To prevent that from happening, test the sizeof() a fictitious
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* type called "struct _test_no_array_##item" which will fail if "item"
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* contains array elements (like "arr[5]").
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*
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* If you hit this, use __array(int, arr, 5) instead.
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*/
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#undef __field
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#define __field(type, item) \
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{ (void)sizeof(struct _test_no_array_##item *); }
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#undef __field_ext
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#define __field_ext(type, item, filter_type) \
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{ (void)sizeof(struct _test_no_array_##item *); }
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#undef __field_struct
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#define __field_struct(type, item) \
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{ (void)sizeof(struct _test_no_array_##item *); }
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#undef __field_struct_ext
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#define __field_struct_ext(type, item, filter_type) \
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{ (void)sizeof(struct _test_no_array_##item *); }
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#undef __array
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#define __array(type, item, len)
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#undef __dynamic_array
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#define __dynamic_array(type, item, len) \
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__item_length = (len) * sizeof(type); \
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__data_offsets->item = __data_size + \
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offsetof(typeof(*entry), __data); \
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__data_offsets->item |= __item_length << 16; \
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__data_size += __item_length;
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#undef __string
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#define __string(item, src) __dynamic_array(char, item, \
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strlen(__string_src(src)) + 1) \
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__data_offsets->item##_ptr_ = src;
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#undef __string_len
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#define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1)\
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__data_offsets->item##_ptr_ = src;
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#undef __vstring
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#define __vstring(item, fmt, ap) __dynamic_array(char, item, \
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__trace_event_vstr_len(fmt, ap))
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#undef __rel_dynamic_array
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#define __rel_dynamic_array(type, item, len) \
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__item_length = (len) * sizeof(type); \
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__data_offsets->item = __data_size + \
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offsetof(typeof(*entry), __data) - \
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offsetof(typeof(*entry), __rel_loc_##item) - \
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sizeof(u32); \
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__data_offsets->item |= __item_length << 16; \
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__data_size += __item_length;
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#undef __rel_string
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#define __rel_string(item, src) __rel_dynamic_array(char, item, \
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strlen(__string_src(src)) + 1) \
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__data_offsets->item##_ptr_ = src;
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#undef __rel_string_len
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#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1)\
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__data_offsets->item##_ptr_ = src;
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/*
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* __bitmask_size_in_bytes_raw is the number of bytes needed to hold
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* num_possible_cpus().
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*/
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#define __bitmask_size_in_bytes_raw(nr_bits) \
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(((nr_bits) + 7) / 8)
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#define __bitmask_size_in_longs(nr_bits) \
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((__bitmask_size_in_bytes_raw(nr_bits) + \
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((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
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/*
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* __bitmask_size_in_bytes is the number of bytes needed to hold
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* num_possible_cpus() padded out to the nearest long. This is what
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* is saved in the buffer, just to be consistent.
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*/
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#define __bitmask_size_in_bytes(nr_bits) \
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(__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
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#undef __bitmask
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#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
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__bitmask_size_in_longs(nr_bits))
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#undef __cpumask
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#define __cpumask(item) __bitmask(item, nr_cpumask_bits)
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#undef __rel_bitmask
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#define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, \
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__bitmask_size_in_longs(nr_bits))
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#undef __rel_cpumask
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#define __rel_cpumask(item) __rel_bitmask(item, nr_cpumask_bits)
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#undef __sockaddr
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#define __sockaddr(field, len) __dynamic_array(u8, field, len)
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#undef __rel_sockaddr
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#define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
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