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6fe4709e JA |
1 | #ifndef BLKTRACE_H |
2 | #define BLKTRACE_H | |
d0ca268b | 3 | |
6fe4709e | 4 | #include <byteswap.h> |
d0ca268b | 5 | #include <asm/types.h> |
6fe4709e JA |
6 | #include <asm/byteorder.h> |
7 | #include "blktrace_api.h" | |
d0ca268b | 8 | |
d0ca268b | 9 | #define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) |
e7c9f3ff | 10 | #define SUPPORTED_VERSION (0x05) |
d0ca268b | 11 | |
6fe4709e JA |
12 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
13 | #define be16_to_cpu(x) __bswap_16(x) | |
14 | #define be32_to_cpu(x) __bswap_32(x) | |
15 | #define be64_to_cpu(x) __bswap_64(x) | |
16 | #define cpu_to_be16(x) __bswap_16(x) | |
17 | #define cpu_to_be32(x) __bswap_32(x) | |
18 | #define cpu_to_be64(x) __bswap_64(x) | |
19 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
20 | #define be16_to_cpu(x) (x) | |
21 | #define be32_to_cpu(x) (x) | |
22 | #define be64_to_cpu(x) (x) | |
23 | #define cpu_to_be16(x) (x) | |
24 | #define cpu_to_be32(x) (x) | |
25 | #define cpu_to_be64(x) (x) | |
26 | #else | |
27 | #error "Bad arch" | |
28 | #endif | |
29 | ||
30 | static inline int verify_trace(struct blk_io_trace *t) | |
31 | { | |
32 | if (!CHECK_MAGIC(t)) { | |
33 | fprintf(stderr, "bad trace magic %x\n", t->magic); | |
34 | return 1; | |
35 | } | |
36 | if ((t->magic & 0xff) != SUPPORTED_VERSION) { | |
37 | fprintf(stderr, "unsupported trace version %x\n", | |
38 | t->magic & 0xff); | |
39 | return 1; | |
40 | } | |
d0ca268b | 41 | |
6fe4709e JA |
42 | return 0; |
43 | } | |
d0ca268b | 44 | |
6fe4709e JA |
45 | static inline void trace_to_be(struct blk_io_trace *t) |
46 | { | |
47 | t->magic = cpu_to_be32(t->magic); | |
48 | t->sequence = cpu_to_be32(t->sequence); | |
49 | t->time = cpu_to_be64(t->time); | |
50 | t->sector = cpu_to_be64(t->sector); | |
51 | t->bytes = cpu_to_be32(t->bytes); | |
52 | t->action = cpu_to_be32(t->action); | |
53 | t->pid = cpu_to_be32(t->pid); | |
654aaa52 | 54 | t->cpu = cpu_to_be32(t->cpu); |
6fe4709e JA |
55 | t->error = cpu_to_be16(t->error); |
56 | t->pdu_len = cpu_to_be16(t->pdu_len); | |
e7c9f3ff | 57 | t->device = cpu_to_be32(t->device); |
654aaa52 | 58 | /* t->comm is a string (endian neutral) */ |
6fe4709e | 59 | } |
d0ca268b | 60 | |
6fe4709e JA |
61 | static inline void trace_to_cpu(struct blk_io_trace *t) |
62 | { | |
63 | t->magic = be32_to_cpu(t->magic); | |
64 | t->sequence = be32_to_cpu(t->sequence); | |
65 | t->time = be64_to_cpu(t->time); | |
66 | t->sector = be64_to_cpu(t->sector); | |
67 | t->bytes = be32_to_cpu(t->bytes); | |
68 | t->action = be32_to_cpu(t->action); | |
69 | t->pid = be32_to_cpu(t->pid); | |
654aaa52 | 70 | t->cpu = be32_to_cpu(t->cpu); |
6fe4709e JA |
71 | t->error = be16_to_cpu(t->error); |
72 | t->pdu_len = be16_to_cpu(t->pdu_len); | |
e7c9f3ff | 73 | t->device = be32_to_cpu(t->device); |
654aaa52 | 74 | /* t->comm is a string (endian neutral) */ |
6fe4709e | 75 | } |
d0ca268b JA |
76 | |
77 | #endif |