1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* Stage 5 definitions for creating trace events */ 4 5 /* 6 * remember the offset of each array from the beginning of the event. 7 */ 8 9 #undef __entry 10 #define __entry entry 11 12 #undef __field 13 #define __field(type, item) 14 15 #undef __field_ext 16 #define __field_ext(type, item, filter_type) 17 18 #undef __field_struct 19 #define __field_struct(type, item) 20 21 #undef __field_struct_ext 22 #define __field_struct_ext(type, item, filter_type) 23 24 #undef __array 25 #define __array(type, item, len) 26 27 #undef __dynamic_array 28 #define __dynamic_array(type, item, len) \ 29 __item_length = (len) * sizeof(type); \ 30 __data_offsets->item = __data_size + \ 31 offsetof(typeof(*entry), __data); \ 32 __data_offsets->item |= __item_length << 16; \ 33 __data_size += __item_length; 34 35 #undef __string 36 #define __string(item, src) __dynamic_array(char, item, \ 37 strlen((src) ? (const char *)(src) : "(null)") + 1) 38 39 #undef __string_len 40 #define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1) 41 42 #undef __vstring 43 #define __vstring(item, fmt, ap) __dynamic_array(char, item, \ 44 __trace_event_vstr_len(fmt, ap)) 45 46 #undef __rel_dynamic_array 47 #define __rel_dynamic_array(type, item, len) \ 48 __item_length = (len) * sizeof(type); \ 49 __data_offsets->item = __data_size + \ 50 offsetof(typeof(*entry), __data) - \ 51 offsetof(typeof(*entry), __rel_loc_##item) - \ 52 sizeof(u32); \ 53 __data_offsets->item |= __item_length << 16; \ 54 __data_size += __item_length; 55 56 #undef __rel_string 57 #define __rel_string(item, src) __rel_dynamic_array(char, item, \ 58 strlen((src) ? (const char *)(src) : "(null)") + 1) 59 60 #undef __rel_string_len 61 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1) 62 /* 63 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold 64 * num_possible_cpus(). 65 */ 66 #define __bitmask_size_in_bytes_raw(nr_bits) \ 67 (((nr_bits) + 7) / 8) 68 69 #define __bitmask_size_in_longs(nr_bits) \ 70 ((__bitmask_size_in_bytes_raw(nr_bits) + \ 71 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) 72 73 /* 74 * __bitmask_size_in_bytes is the number of bytes needed to hold 75 * num_possible_cpus() padded out to the nearest long. This is what 76 * is saved in the buffer, just to be consistent. 77 */ 78 #define __bitmask_size_in_bytes(nr_bits) \ 79 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) 80 81 #undef __bitmask 82 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ 83 __bitmask_size_in_longs(nr_bits)) 84 85 #undef __rel_bitmask 86 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, \ 87 __bitmask_size_in_longs(nr_bits)) 88 89 #undef __sockaddr 90 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 91 92 #undef __rel_sockaddr 93 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 94