1 #ifndef BLKTRACE_H
2 #define BLKTRACE_H
3
4 #include <stdio.h>
5 #include <byteswap.h>
6 #include <endian.h>
7
8 #include "blktrace_api.h"
9 #include "rbtree.h"
10
11 #define MINORBITS 20
12 #define MINORMASK ((1U << MINORBITS) - 1)
13 #define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
14 #define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
15
16 #define SECONDS(x) ((unsigned long long)(x) / 1000000000)
17 #define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000)
18 #define DOUBLE_TO_NANO_ULL(d) ((unsigned long long)((d) * 1000000000))
19
20 #define min(a, b) ((a) < (b) ? (a) : (b))
21 #define max(a, b) ((a) > (b) ? (a) : (b))
22
23 #define t_sec(t) ((t)->bytes >> 9)
24 #define t_kb(t) ((t)->bytes >> 10)
25
26 typedef __u32 u32;
27 typedef __u8 u8;
28
29 struct io_stats {
30 unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
31 unsigned long ireads, iwrites, rrqueue, wrqueue;
32 unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
33 unsigned long long iread_kb, iwrite_kb;
34 unsigned long long mread_kb, mwrite_kb;
35 unsigned long qreads_pc, qwrites_pc, ireads_pc, iwrites_pc;
36 unsigned long rrqueue_pc, wrqueue_pc, creads_pc, cwrites_pc;
37 unsigned long long qread_kb_pc, qwrite_kb_pc, iread_kb_pc, iwrite_kb_pc;
38 unsigned long io_unplugs, timer_unplugs;
39 };
40
41 struct per_cpu_info {
42 unsigned int cpu;
43 unsigned int nelems;
44
45 int fd;
46 int fdblock;
47 char fname[128];
48
49 struct io_stats io_stats;
50
51 struct rb_root rb_last;
52 unsigned long rb_last_entries;
53 unsigned long last_sequence;
54 unsigned long smallest_seq_read;
55
56 struct skip_info *skips_head;
57 struct skip_info *skips_tail;
58 };
59
60 extern FILE *ofp;
61 extern int data_is_native;
62 extern struct timespec abs_start_time;
63
64 #define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
65 #define SUPPORTED_VERSION (0x07)
66
67 #define __bswap_16 bswap_16
68 #define __bswap_32 bswap_32
69 #define __bswap_64 bswap_64
70
71 #if __BYTE_ORDER == __LITTLE_ENDIAN
72 #define be16_to_cpu(x) __bswap_16(x)
73 #define be32_to_cpu(x) __bswap_32(x)
74 #define be64_to_cpu(x) __bswap_64(x)
75 #define cpu_to_be16(x) __bswap_16(x)
76 #define cpu_to_be32(x) __bswap_32(x)
77 #define cpu_to_be64(x) __bswap_64(x)
78 #elif __BYTE_ORDER == __BIG_ENDIAN
79 #define be16_to_cpu(x) (x)
80 #define be32_to_cpu(x) (x)
81 #define be64_to_cpu(x) (x)
82 #define cpu_to_be16(x) (x)
83 #define cpu_to_be32(x) (x)
84 #define cpu_to_be64(x) (x)
85 #else
86 #error "Bad arch"
87 #endif
88
verify_trace(struct blk_io_trace * t)89 static inline int verify_trace(struct blk_io_trace *t)
90 {
91 if (!CHECK_MAGIC(t)) {
92 fprintf(stderr, "bad trace magic %x\n", t->magic);
93 return 1;
94 }
95 if ((t->magic & 0xff) != SUPPORTED_VERSION) {
96 fprintf(stderr, "unsupported trace version %x\n",
97 t->magic & 0xff);
98 return 1;
99 }
100
101 return 0;
102 }
103
trace_to_cpu(struct blk_io_trace * t)104 static inline void trace_to_cpu(struct blk_io_trace *t)
105 {
106 if (data_is_native)
107 return;
108
109 t->magic = be32_to_cpu(t->magic);
110 t->sequence = be32_to_cpu(t->sequence);
111 t->time = be64_to_cpu(t->time);
112 t->sector = be64_to_cpu(t->sector);
113 t->bytes = be32_to_cpu(t->bytes);
114 t->action = be32_to_cpu(t->action);
115 t->pid = be32_to_cpu(t->pid);
116 t->device = be32_to_cpu(t->device);
117 t->cpu = be16_to_cpu(t->cpu);
118 t->error = be16_to_cpu(t->error);
119 t->pdu_len = be16_to_cpu(t->pdu_len);
120 }
121
122 /*
123 * check whether data is native or not
124 */
check_data_endianness(u32 magic)125 static inline int check_data_endianness(u32 magic)
126 {
127 if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
128 data_is_native = 1;
129 return 0;
130 }
131
132 magic = __bswap_32(magic);
133 if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
134 data_is_native = 0;
135 return 0;
136 }
137
138 return 1;
139 }
140
141 extern void set_all_format_specs(char *);
142 extern int add_format_spec(char *);
143 extern void process_fmt(char *, struct per_cpu_info *, struct blk_io_trace *,
144 unsigned long long, int, unsigned char *);
145 extern int valid_act_opt(int);
146 extern int find_mask_map(char *);
147 extern char *find_process_name(pid_t);
148
149 #endif
150