projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 607ca46e DH |
1 | #ifndef _UAPIBLKTRACE_H |
| 2 | #define _UAPIBLKTRACE_H | |
| 3 | ||
| 4 | #include <linux/types.h> | |
| 5 | ||
| 6 | /* | |
| 7 | * Trace categories | |
| 8 | */ | |
| 9 | enum blktrace_cat { | |
| 10 | BLK_TC_READ = 1 << 0, /* reads */ | |
| 11 | BLK_TC_WRITE = 1 << 1, /* writes */ | |
| 12 | BLK_TC_FLUSH = 1 << 2, /* flush */ | |
| 13 | BLK_TC_SYNC = 1 << 3, /* sync IO */ | |
| 14 | BLK_TC_SYNCIO = BLK_TC_SYNC, | |
| 15 | BLK_TC_QUEUE = 1 << 4, /* queueing/merging */ | |
| 16 | BLK_TC_REQUEUE = 1 << 5, /* requeueing */ | |
| 17 | BLK_TC_ISSUE = 1 << 6, /* issue */ | |
| 18 | BLK_TC_COMPLETE = 1 << 7, /* completions */ | |
| 19 | BLK_TC_FS = 1 << 8, /* fs requests */ | |
| 20 | BLK_TC_PC = 1 << 9, /* pc requests */ | |
| 21 | BLK_TC_NOTIFY = 1 << 10, /* special message */ | |
| 22 | BLK_TC_AHEAD = 1 << 11, /* readahead */ | |
| 23 | BLK_TC_META = 1 << 12, /* metadata */ | |
| 24 | BLK_TC_DISCARD = 1 << 13, /* discard requests */ | |
| 25 | BLK_TC_DRV_DATA = 1 << 14, /* binary per-driver data */ | |
| 26 | BLK_TC_FUA = 1 << 15, /* fua requests */ | |
| 27 | ||
| 28 | BLK_TC_END = 1 << 15, /* we've run out of bits! */ | |
| 29 | }; | |
| 30 | ||
| 31 | #define BLK_TC_SHIFT (16) | |
| 32 | #define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT) | |
| 33 | ||
| 34 | /* | |
| 35 | * Basic trace actions | |
| 36 | */ | |
| 37 | enum blktrace_act { | |
| 38 | __BLK_TA_QUEUE = 1, /* queued */ | |
| 39 | __BLK_TA_BACKMERGE, /* back merged to existing rq */ | |
| 40 | __BLK_TA_FRONTMERGE, /* front merge to existing rq */ | |
| 41 | __BLK_TA_GETRQ, /* allocated new request */ | |
| 42 | __BLK_TA_SLEEPRQ, /* sleeping on rq allocation */ | |
| 43 | __BLK_TA_REQUEUE, /* request requeued */ | |
| 44 | __BLK_TA_ISSUE, /* sent to driver */ | |
| 45 | __BLK_TA_COMPLETE, /* completed by driver */ | |
| 46 | __BLK_TA_PLUG, /* queue was plugged */ | |
| 47 | __BLK_TA_UNPLUG_IO, /* queue was unplugged by io */ | |
| 48 | __BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */ | |
| 49 | __BLK_TA_INSERT, /* insert request */ | |
| 50 | __BLK_TA_SPLIT, /* bio was split */ | |
| 51 | __BLK_TA_BOUNCE, /* bio was bounced */ | |
| 52 | __BLK_TA_REMAP, /* bio was remapped */ | |
| 53 | __BLK_TA_ABORT, /* request aborted */ | |
| 54 | __BLK_TA_DRV_DATA, /* driver-specific binary data */ | |
| 55 | }; | |
| 56 | ||
| 57 | /* | |
| 58 | * Notify events. | |
| 59 | */ | |
| 60 | enum blktrace_notify { | |
| 61 | __BLK_TN_PROCESS = 0, /* establish pid/name mapping */ | |
| 62 | __BLK_TN_TIMESTAMP, /* include system clock */ | |
| 63 | __BLK_TN_MESSAGE, /* Character string message */ | |
| 64 | }; | |
| 65 | ||
| 66 | ||
| 67 | /* | |
| 68 | * Trace actions in full. Additionally, read or write is masked | |
| 69 | */ | |
| 70 | #define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 71 | #define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 72 | #define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 73 | #define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 74 | #define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 75 | #define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE)) | |
| 76 | #define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE)) | |
| 77 | #define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE)) | |
| 78 | #define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 79 | #define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 80 | #define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 81 | #define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 82 | #define BLK_TA_SPLIT (__BLK_TA_SPLIT) | |
| 83 | #define BLK_TA_BOUNCE (__BLK_TA_BOUNCE) | |
| 84 | #define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 85 | #define BLK_TA_ABORT (__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE)) | |
| 86 | #define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA)) | |
| 87 | ||
| 88 | #define BLK_TN_PROCESS (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY)) | |
| 89 | #define BLK_TN_TIMESTAMP (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY)) | |
| 90 | #define BLK_TN_MESSAGE (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY)) | |
| 91 | ||
| 92 | #define BLK_IO_TRACE_MAGIC 0x65617400 | |
| 93 | #define BLK_IO_TRACE_VERSION 0x07 | |
| 94 | ||
| 95 | /* | |
| 96 | * The trace itself | |
| 97 | */ | |
| 98 | struct blk_io_trace { | |
| 99 | __u32 magic; /* MAGIC << 8 | version */ | |
| 100 | __u32 sequence; /* event number */ | |
| 101 | __u64 time; /* in microseconds */ | |
| 102 | __u64 sector; /* disk offset */ | |
| 103 | __u32 bytes; /* transfer length */ | |
| 104 | __u32 action; /* what happened */ | |
| 105 | __u32 pid; /* who did it */ | |
| 106 | __u32 device; /* device number */ | |
| 107 | __u32 cpu; /* on what cpu did it happen */ | |
| 108 | __u16 error; /* completion error */ | |
| 109 | __u16 pdu_len; /* length of data after this trace */ | |
| 110 | }; | |
| 111 | ||
| 112 | /* | |
| 113 | * The remap event | |
| 114 | */ | |
| 115 | struct blk_io_trace_remap { | |
| 116 | __be32 device_from; | |
| 117 | __be32 device_to; | |
| 118 | __be64 sector_from; | |
| 119 | }; | |
| 120 | ||
| 121 | enum { | |
| 122 | Blktrace_setup = 1, | |
| 123 | Blktrace_running, | |
| 124 | Blktrace_stopped, | |
| 125 | }; | |
| 126 | ||
| 127 | #define BLKTRACE_BDEV_SIZE 32 | |
| 128 | ||
| 129 | /* | |
| 130 | * User setup structure passed with BLKTRACESTART | |
| 131 | */ | |
| 132 | struct blk_user_trace_setup { | |
| 133 | char name[BLKTRACE_BDEV_SIZE]; /* output */ | |
| 134 | __u16 act_mask; /* input */ | |
| 135 | __u32 buf_size; /* input */ | |
| 136 | __u32 buf_nr; /* input */ | |
| 137 | __u64 start_lba; | |
| 138 | __u64 end_lba; | |
| 139 | __u32 pid; | |
| 140 | }; | |
| 141 | ||
| 142 | #endif /* _UAPIBLKTRACE_H */ |