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146 lines
4.6 KiB
146 lines
4.6 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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#ifndef _UAPIBLKTRACE_H |
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#define _UAPIBLKTRACE_H |
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#include <linux/types.h> |
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/* |
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* Trace categories |
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*/ |
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enum blktrace_cat { |
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BLK_TC_READ = 1 << 0, /* reads */ |
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BLK_TC_WRITE = 1 << 1, /* writes */ |
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BLK_TC_FLUSH = 1 << 2, /* flush */ |
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BLK_TC_SYNC = 1 << 3, /* sync IO */ |
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BLK_TC_SYNCIO = BLK_TC_SYNC, |
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BLK_TC_QUEUE = 1 << 4, /* queueing/merging */ |
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BLK_TC_REQUEUE = 1 << 5, /* requeueing */ |
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BLK_TC_ISSUE = 1 << 6, /* issue */ |
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BLK_TC_COMPLETE = 1 << 7, /* completions */ |
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BLK_TC_FS = 1 << 8, /* fs requests */ |
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BLK_TC_PC = 1 << 9, /* pc requests */ |
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BLK_TC_NOTIFY = 1 << 10, /* special message */ |
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BLK_TC_AHEAD = 1 << 11, /* readahead */ |
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BLK_TC_META = 1 << 12, /* metadata */ |
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BLK_TC_DISCARD = 1 << 13, /* discard requests */ |
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BLK_TC_DRV_DATA = 1 << 14, /* binary per-driver data */ |
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BLK_TC_FUA = 1 << 15, /* fua requests */ |
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BLK_TC_END = 1 << 15, /* we've run out of bits! */ |
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}; |
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#define BLK_TC_SHIFT (16) |
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#define BLK_TC_ACT(act) ((act) << BLK_TC_SHIFT) |
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/* |
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* Basic trace actions |
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*/ |
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enum blktrace_act { |
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__BLK_TA_QUEUE = 1, /* queued */ |
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__BLK_TA_BACKMERGE, /* back merged to existing rq */ |
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__BLK_TA_FRONTMERGE, /* front merge to existing rq */ |
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__BLK_TA_GETRQ, /* allocated new request */ |
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__BLK_TA_SLEEPRQ, /* sleeping on rq allocation */ |
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__BLK_TA_REQUEUE, /* request requeued */ |
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__BLK_TA_ISSUE, /* sent to driver */ |
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__BLK_TA_COMPLETE, /* completed by driver */ |
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__BLK_TA_PLUG, /* queue was plugged */ |
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__BLK_TA_UNPLUG_IO, /* queue was unplugged by io */ |
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__BLK_TA_UNPLUG_TIMER, /* queue was unplugged by timer */ |
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__BLK_TA_INSERT, /* insert request */ |
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__BLK_TA_SPLIT, /* bio was split */ |
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__BLK_TA_BOUNCE, /* bio was bounced */ |
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__BLK_TA_REMAP, /* bio was remapped */ |
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__BLK_TA_ABORT, /* request aborted */ |
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__BLK_TA_DRV_DATA, /* driver-specific binary data */ |
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__BLK_TA_CGROUP = 1 << 8, /* from a cgroup*/ |
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}; |
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/* |
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* Notify events. |
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*/ |
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enum blktrace_notify { |
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__BLK_TN_PROCESS = 0, /* establish pid/name mapping */ |
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__BLK_TN_TIMESTAMP, /* include system clock */ |
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__BLK_TN_MESSAGE, /* Character string message */ |
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__BLK_TN_CGROUP = __BLK_TA_CGROUP, /* from a cgroup */ |
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}; |
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/* |
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* Trace actions in full. Additionally, read or write is masked |
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*/ |
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#define BLK_TA_QUEUE (__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_BACKMERGE (__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_FRONTMERGE (__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_GETRQ (__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_SLEEPRQ (__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_REQUEUE (__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE)) |
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#define BLK_TA_ISSUE (__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE)) |
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#define BLK_TA_COMPLETE (__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE)) |
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#define BLK_TA_PLUG (__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_UNPLUG_IO (__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_UNPLUG_TIMER (__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_INSERT (__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_SPLIT (__BLK_TA_SPLIT) |
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#define BLK_TA_BOUNCE (__BLK_TA_BOUNCE) |
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#define BLK_TA_REMAP (__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_ABORT (__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE)) |
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#define BLK_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA)) |
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#define BLK_TN_PROCESS (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY)) |
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#define BLK_TN_TIMESTAMP (__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY)) |
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#define BLK_TN_MESSAGE (__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY)) |
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#define BLK_IO_TRACE_MAGIC 0x65617400 |
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#define BLK_IO_TRACE_VERSION 0x07 |
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/* |
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* The trace itself |
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*/ |
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struct blk_io_trace { |
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__u32 magic; /* MAGIC << 8 | version */ |
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__u32 sequence; /* event number */ |
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__u64 time; /* in nanoseconds */ |
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__u64 sector; /* disk offset */ |
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__u32 bytes; /* transfer length */ |
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__u32 action; /* what happened */ |
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__u32 pid; /* who did it */ |
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__u32 device; /* device number */ |
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__u32 cpu; /* on what cpu did it happen */ |
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__u16 error; /* completion error */ |
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__u16 pdu_len; /* length of data after this trace */ |
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/* cgroup id will be stored here if exists */ |
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}; |
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/* |
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* The remap event |
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*/ |
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struct blk_io_trace_remap { |
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__be32 device_from; |
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__be32 device_to; |
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__be64 sector_from; |
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}; |
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enum { |
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Blktrace_setup = 1, |
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Blktrace_running, |
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Blktrace_stopped, |
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}; |
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#define BLKTRACE_BDEV_SIZE 32 |
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/* |
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* User setup structure passed with BLKTRACESETUP |
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*/ |
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struct blk_user_trace_setup { |
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char name[BLKTRACE_BDEV_SIZE]; /* output */ |
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__u16 act_mask; /* input */ |
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__u32 buf_size; /* input */ |
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__u32 buf_nr; /* input */ |
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__u64 start_lba; |
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__u64 end_lba; |
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__u32 pid; |
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}; |
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#endif /* _UAPIBLKTRACE_H */
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