diff options
Diffstat (limited to 'blktrace.h')
| -rw-r--r-- | blktrace.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/blktrace.h b/blktrace.h new file mode 100644 index 0000000..8f33682 --- /dev/null +++ b/blktrace.h @@ -0,0 +1,149 @@ +#ifndef BLKTRACE_H +#define BLKTRACE_H + +#include <stdio.h> +#include <byteswap.h> +#include <endian.h> + +#include "blktrace_api.h" +#include "rbtree.h" + +#define MINORBITS 20 +#define MINORMASK ((1U << MINORBITS) - 1) +#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS)) +#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK)) + +#define SECONDS(x) ((unsigned long long)(x) / 1000000000) +#define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000) +#define DOUBLE_TO_NANO_ULL(d) ((unsigned long long)((d) * 1000000000)) + +#define min(a, b) ((a) < (b) ? (a) : (b)) +#define max(a, b) ((a) > (b) ? (a) : (b)) + +#define t_sec(t) ((t)->bytes >> 9) +#define t_kb(t) ((t)->bytes >> 10) + +typedef __u32 u32; +typedef __u8 u8; + +struct io_stats { + unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites; + unsigned long ireads, iwrites, rrqueue, wrqueue; + unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb; + unsigned long long iread_kb, iwrite_kb; + unsigned long long mread_kb, mwrite_kb; + unsigned long qreads_pc, qwrites_pc, ireads_pc, iwrites_pc; + unsigned long rrqueue_pc, wrqueue_pc, creads_pc, cwrites_pc; + unsigned long long qread_kb_pc, qwrite_kb_pc, iread_kb_pc, iwrite_kb_pc; + unsigned long io_unplugs, timer_unplugs; +}; + +struct per_cpu_info { + unsigned int cpu; + unsigned int nelems; + + int fd; + int fdblock; + char fname[128]; + + struct io_stats io_stats; + + struct rb_root rb_last; + unsigned long rb_last_entries; + unsigned long last_sequence; + unsigned long smallest_seq_read; + + struct skip_info *skips_head; + struct skip_info *skips_tail; +}; + +extern FILE *ofp; +extern int data_is_native; +extern struct timespec abs_start_time; + +#define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) +#define SUPPORTED_VERSION (0x07) + +#define __bswap_16 bswap_16 +#define __bswap_32 bswap_32 +#define __bswap_64 bswap_64 + +#if __BYTE_ORDER == __LITTLE_ENDIAN +#define be16_to_cpu(x) __bswap_16(x) +#define be32_to_cpu(x) __bswap_32(x) +#define be64_to_cpu(x) __bswap_64(x) +#define cpu_to_be16(x) __bswap_16(x) +#define cpu_to_be32(x) __bswap_32(x) +#define cpu_to_be64(x) __bswap_64(x) +#elif __BYTE_ORDER == __BIG_ENDIAN +#define be16_to_cpu(x) (x) +#define be32_to_cpu(x) (x) +#define be64_to_cpu(x) (x) +#define cpu_to_be16(x) (x) +#define cpu_to_be32(x) (x) +#define cpu_to_be64(x) (x) +#else +#error "Bad arch" +#endif + +static inline int verify_trace(struct blk_io_trace *t) +{ + if (!CHECK_MAGIC(t)) { + fprintf(stderr, "bad trace magic %x\n", t->magic); + return 1; + } + if ((t->magic & 0xff) != SUPPORTED_VERSION) { + fprintf(stderr, "unsupported trace version %x\n", + t->magic & 0xff); + return 1; + } + + return 0; +} + +static inline void trace_to_cpu(struct blk_io_trace *t) +{ + if (data_is_native) + return; + + t->magic = be32_to_cpu(t->magic); + t->sequence = be32_to_cpu(t->sequence); + t->time = be64_to_cpu(t->time); + t->sector = be64_to_cpu(t->sector); + t->bytes = be32_to_cpu(t->bytes); + t->action = be32_to_cpu(t->action); + t->pid = be32_to_cpu(t->pid); + t->device = be32_to_cpu(t->device); + t->cpu = be16_to_cpu(t->cpu); + t->error = be16_to_cpu(t->error); + t->pdu_len = be16_to_cpu(t->pdu_len); +} + +/* + * check whether data is native or not + */ +static inline int check_data_endianness(u32 magic) +{ + if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { + data_is_native = 1; + return 0; + } + + magic = __bswap_32(magic); + if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { + data_is_native = 0; + return 0; + } + + return 1; +} + +extern void set_all_format_specs(char *); +extern int add_format_spec(char *); +extern void process_fmt(char *, struct per_cpu_info *, struct blk_io_trace *, + unsigned long long, int, unsigned char *); +extern int valid_act_opt(int); +extern int find_mask_map(char *); +extern char *find_process_name(pid_t); + +#endif |