blktrace.h

   1 #ifndef BLKTRACE_H
   2 #define BLKTRACE_H
   3
   4 #include <byteswap.h>
   5 #include <asm/types.h>
   6 #include <asm/byteorder.h>
   7 #include "blktrace_api.h"
   8
   9 #define MINORBITS       20
  10 #define MINORMASK       ((1U << MINORBITS) - 1)
  11 #define MAJOR(dev)      ((unsigned int) ((dev) >> MINORBITS))
  12 #define MINOR(dev)      ((unsigned int) ((dev) & MINORMASK))
  13
  14 #define SECONDS(x)              ((unsigned long long)(x) / 1000000000)
  15 #define NANO_SECONDS(x)         ((unsigned long long)(x) % 1000000000)
  16 #define DOUBLE_TO_NANO_ULL(d)   ((unsigned long long)((d) * 1000000000))
  17
  18 #define min(a, b)       ((a) < (b) ? (a) : (b))
  19
  20 typedef __u32 u32;
  21 typedef __u8 u8;
  22
  23 struct io_stats {
  24         unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
  25         unsigned long ireads, iwrites;
  26         unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
  27         unsigned long long iread_kb, iwrite_kb;
  28         unsigned long io_unplugs, timer_unplugs;
  29 };
  30
  31 struct per_cpu_info {
  32         int cpu;
  33         int nelems;
  34
  35         int fd;
  36         char fname[128];
  37
  38         struct io_stats io_stats;
  39 };
  40
  41 extern FILE *ofp;
  42
  43 #define CHECK_MAGIC(t)          (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
  44 #define SUPPORTED_VERSION       (0x05)
  45
  46 #if defined(__LITTLE_ENDIAN_BITFIELD)
  47 #define be16_to_cpu(x)          __bswap_16(x)
  48 #define be32_to_cpu(x)          __bswap_32(x)
  49 #define be64_to_cpu(x)          __bswap_64(x)
  50 #define cpu_to_be16(x)          __bswap_16(x)
  51 #define cpu_to_be32(x)          __bswap_32(x)
  52 #define cpu_to_be64(x)          __bswap_64(x)
  53 #elif defined(__BIG_ENDIAN_BITFIELD)
  54 #define be16_to_cpu(x)          (x)
  55 #define be32_to_cpu(x)          (x)
  56 #define be64_to_cpu(x)          (x)
  57 #define cpu_to_be16(x)          (x)
  58 #define cpu_to_be32(x)          (x)
  59 #define cpu_to_be64(x)          (x)
  60 #else
  61 #error "Bad arch"
  62 #endif
  63
  64 static inline int verify_trace(struct blk_io_trace *t)
  65 {
  66         if (!CHECK_MAGIC(t)) {
  67                 fprintf(stderr, "bad trace magic %x\n", t->magic);
  68                 return 1;
  69         }
  70         if ((t->magic & 0xff) != SUPPORTED_VERSION) {
  71                 fprintf(stderr, "unsupported trace version %x\n",
  72                         t->magic & 0xff);
  73                 return 1;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static inline void trace_to_be(struct blk_io_trace *t)
  80 {
  81         t->magic        = cpu_to_be32(t->magic);
  82         t->sequence     = cpu_to_be32(t->sequence);
  83         t->time         = cpu_to_be64(t->time);
  84         t->sector       = cpu_to_be64(t->sector);
  85         t->bytes        = cpu_to_be32(t->bytes);
  86         t->action       = cpu_to_be32(t->action);
  87         t->pid          = cpu_to_be32(t->pid);
  88         t->cpu          = cpu_to_be32(t->cpu);
  89         t->error        = cpu_to_be16(t->error);
  90         t->pdu_len      = cpu_to_be16(t->pdu_len);
  91         t->device       = cpu_to_be32(t->device);
  92         /* t->comm is a string (endian neutral) */
  93 }
  94
  95 static inline void trace_to_cpu(struct blk_io_trace *t)
  96 {
  97         t->magic        = be32_to_cpu(t->magic);
  98         t->sequence     = be32_to_cpu(t->sequence);
  99         t->time         = be64_to_cpu(t->time);
 100         t->sector       = be64_to_cpu(t->sector);
 101         t->bytes        = be32_to_cpu(t->bytes);
 102         t->action       = be32_to_cpu(t->action);
 103         t->pid          = be32_to_cpu(t->pid);
 104         t->cpu          = be32_to_cpu(t->cpu);
 105         t->error        = be16_to_cpu(t->error);
 106         t->pdu_len      = be16_to_cpu(t->pdu_len);
 107         t->device       = be32_to_cpu(t->device);
 108         /* t->comm is a string (endian neutral) */
 109 }
 110
 111 extern void set_all_format_specs(char *);
 112 extern int add_format_spec(char *);
 113 extern void process_fmt(char *, struct per_cpu_info *, struct blk_io_trace *,
 114                         unsigned long long, int, unsigned char *);
 115
 116 #endif