blktrace.h

   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
  10 #define MINORBITS       20
  11 #define MINORMASK       ((1U << MINORBITS) - 1)
  12 #define MAJOR(dev)      ((unsigned int) ((dev) >> MINORBITS))
  13 #define MINOR(dev)      ((unsigned int) ((dev) & MINORMASK))
  14
  15 #define SECONDS(x)              ((unsigned long long)(x) / 1000000000)
  16 #define NANO_SECONDS(x)         ((unsigned long long)(x) % 1000000000)
  17 #define DOUBLE_TO_NANO_ULL(d)   ((unsigned long long)((d) * 1000000000))
  18
  19 #define min(a, b)       ((a) < (b) ? (a) : (b))
  20
  21 typedef __u32 u32;
  22 typedef __u8 u8;
  23
  24 struct io_stats {
  25         unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
  26         unsigned long ireads, iwrites;
  27         unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
  28         unsigned long long iread_kb, iwrite_kb;
  29         unsigned long io_unplugs, timer_unplugs;
  30 };
  31
  32 struct per_cpu_info {
  33         unsigned int cpu;
  34         unsigned int nelems;
  35
  36         int fd;
  37         char fname[128];
  38
  39         struct io_stats io_stats;
  40 };
  41
  42 extern FILE *ofp;
  43
  44 #define CHECK_MAGIC(t)          (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
  45 #define SUPPORTED_VERSION       (0x05)
  46
  47 #if __BYTE_ORDER == __LITTLE_ENDIAN
  48 #define be16_to_cpu(x)          __bswap_16(x)
  49 #define be32_to_cpu(x)          __bswap_32(x)
  50 #define be64_to_cpu(x)          __bswap_64(x)
  51 #define cpu_to_be16(x)          __bswap_16(x)
  52 #define cpu_to_be32(x)          __bswap_32(x)
  53 #define cpu_to_be64(x)          __bswap_64(x)
  54 #elif __BYTE_ORDER == __BIG_ENDIAN
  55 #define be16_to_cpu(x)          (x)
  56 #define be32_to_cpu(x)          (x)
  57 #define be64_to_cpu(x)          (x)
  58 #define cpu_to_be16(x)          (x)
  59 #define cpu_to_be32(x)          (x)
  60 #define cpu_to_be64(x)          (x)
  61 #else
  62 #error "Bad arch"
  63 #endif
  64
  65 static inline int verify_trace(struct blk_io_trace *t)
  66 {
  67         if (!CHECK_MAGIC(t)) {
  68                 fprintf(stderr, "bad trace magic %x\n", t->magic);
  69                 return 1;
  70         }
  71         if ((t->magic & 0xff) != SUPPORTED_VERSION) {
  72                 fprintf(stderr, "unsupported trace version %x\n",
  73                         t->magic & 0xff);
  74                 return 1;
  75         }
  76
  77         return 0;
  78 }
  79
  80 static inline void trace_to_be(struct blk_io_trace *t)
  81 {
  82         t->magic        = cpu_to_be32(t->magic);
  83         t->sequence     = cpu_to_be32(t->sequence);
  84         t->time         = cpu_to_be64(t->time);
  85         t->sector       = cpu_to_be64(t->sector);
  86         t->bytes        = cpu_to_be32(t->bytes);
  87         t->action       = cpu_to_be32(t->action);
  88         t->pid          = cpu_to_be32(t->pid);
  89         t->cpu          = cpu_to_be32(t->cpu);
  90         t->error        = cpu_to_be16(t->error);
  91         t->pdu_len      = cpu_to_be16(t->pdu_len);
  92         t->device       = cpu_to_be32(t->device);
  93         /* t->comm is a string (endian neutral) */
  94 }
  95
  96 static inline void trace_to_cpu(struct blk_io_trace *t)
  97 {
  98         t->magic        = be32_to_cpu(t->magic);
  99         t->sequence     = be32_to_cpu(t->sequence);
 100         t->time         = be64_to_cpu(t->time);
 101         t->sector       = be64_to_cpu(t->sector);
 102         t->bytes        = be32_to_cpu(t->bytes);
 103         t->action       = be32_to_cpu(t->action);
 104         t->pid          = be32_to_cpu(t->pid);
 105         t->cpu          = be32_to_cpu(t->cpu);
 106         t->error        = be16_to_cpu(t->error);
 107         t->pdu_len      = be16_to_cpu(t->pdu_len);
 108         t->device       = be32_to_cpu(t->device);
 109         /* t->comm is a string (endian neutral) */
 110 }
 111
 112 extern void set_all_format_specs(char *);
 113 extern int add_format_spec(char *);
 114 extern void process_fmt(char *, struct per_cpu_info *, struct blk_io_trace *,
 115                         unsigned long long, int, unsigned char *);
 116 extern int valid_act_opt(int);
 117 extern int find_mask_map(char *);
 118
 119 #endif