cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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blktrace_api.h (4716B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2#ifndef _UAPIBLKTRACE_H
      3#define _UAPIBLKTRACE_H
      4
      5#include <linux/types.h>
      6
      7/*
      8 * Trace categories
      9 */
     10enum blktrace_cat {
     11	BLK_TC_READ	= 1 << 0,	/* reads */
     12	BLK_TC_WRITE	= 1 << 1,	/* writes */
     13	BLK_TC_FLUSH	= 1 << 2,	/* flush */
     14	BLK_TC_SYNC	= 1 << 3,	/* sync IO */
     15	BLK_TC_SYNCIO	= BLK_TC_SYNC,
     16	BLK_TC_QUEUE	= 1 << 4,	/* queueing/merging */
     17	BLK_TC_REQUEUE	= 1 << 5,	/* requeueing */
     18	BLK_TC_ISSUE	= 1 << 6,	/* issue */
     19	BLK_TC_COMPLETE	= 1 << 7,	/* completions */
     20	BLK_TC_FS	= 1 << 8,	/* fs requests */
     21	BLK_TC_PC	= 1 << 9,	/* pc requests */
     22	BLK_TC_NOTIFY	= 1 << 10,	/* special message */
     23	BLK_TC_AHEAD	= 1 << 11,	/* readahead */
     24	BLK_TC_META	= 1 << 12,	/* metadata */
     25	BLK_TC_DISCARD	= 1 << 13,	/* discard requests */
     26	BLK_TC_DRV_DATA	= 1 << 14,	/* binary per-driver data */
     27	BLK_TC_FUA	= 1 << 15,	/* fua requests */
     28
     29	BLK_TC_END	= 1 << 15,	/* we've run out of bits! */
     30};
     31
     32#define BLK_TC_SHIFT		(16)
     33#define BLK_TC_ACT(act)		((act) << BLK_TC_SHIFT)
     34
     35/*
     36 * Basic trace actions
     37 */
     38enum blktrace_act {
     39	__BLK_TA_QUEUE = 1,		/* queued */
     40	__BLK_TA_BACKMERGE,		/* back merged to existing rq */
     41	__BLK_TA_FRONTMERGE,		/* front merge to existing rq */
     42	__BLK_TA_GETRQ,			/* allocated new request */
     43	__BLK_TA_SLEEPRQ,		/* sleeping on rq allocation */
     44	__BLK_TA_REQUEUE,		/* request requeued */
     45	__BLK_TA_ISSUE,			/* sent to driver */
     46	__BLK_TA_COMPLETE,		/* completed by driver */
     47	__BLK_TA_PLUG,			/* queue was plugged */
     48	__BLK_TA_UNPLUG_IO,		/* queue was unplugged by io */
     49	__BLK_TA_UNPLUG_TIMER,		/* queue was unplugged by timer */
     50	__BLK_TA_INSERT,		/* insert request */
     51	__BLK_TA_SPLIT,			/* bio was split */
     52	__BLK_TA_BOUNCE,		/* bio was bounced */
     53	__BLK_TA_REMAP,			/* bio was remapped */
     54	__BLK_TA_ABORT,			/* request aborted */
     55	__BLK_TA_DRV_DATA,		/* driver-specific binary data */
     56	__BLK_TA_CGROUP = 1 << 8,	/* from a cgroup*/
     57};
     58
     59/*
     60 * Notify events.
     61 */
     62enum blktrace_notify {
     63	__BLK_TN_PROCESS = 0,		/* establish pid/name mapping */
     64	__BLK_TN_TIMESTAMP,		/* include system clock */
     65	__BLK_TN_MESSAGE,		/* Character string message */
     66	__BLK_TN_CGROUP = __BLK_TA_CGROUP, /* from a cgroup */
     67};
     68
     69
     70/*
     71 * Trace actions in full. Additionally, read or write is masked
     72 */
     73#define BLK_TA_QUEUE		(__BLK_TA_QUEUE | BLK_TC_ACT(BLK_TC_QUEUE))
     74#define BLK_TA_BACKMERGE	(__BLK_TA_BACKMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
     75#define BLK_TA_FRONTMERGE	(__BLK_TA_FRONTMERGE | BLK_TC_ACT(BLK_TC_QUEUE))
     76#define	BLK_TA_GETRQ		(__BLK_TA_GETRQ | BLK_TC_ACT(BLK_TC_QUEUE))
     77#define	BLK_TA_SLEEPRQ		(__BLK_TA_SLEEPRQ | BLK_TC_ACT(BLK_TC_QUEUE))
     78#define	BLK_TA_REQUEUE		(__BLK_TA_REQUEUE | BLK_TC_ACT(BLK_TC_REQUEUE))
     79#define BLK_TA_ISSUE		(__BLK_TA_ISSUE | BLK_TC_ACT(BLK_TC_ISSUE))
     80#define BLK_TA_COMPLETE		(__BLK_TA_COMPLETE| BLK_TC_ACT(BLK_TC_COMPLETE))
     81#define BLK_TA_PLUG		(__BLK_TA_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
     82#define BLK_TA_UNPLUG_IO	(__BLK_TA_UNPLUG_IO | BLK_TC_ACT(BLK_TC_QUEUE))
     83#define BLK_TA_UNPLUG_TIMER	(__BLK_TA_UNPLUG_TIMER | BLK_TC_ACT(BLK_TC_QUEUE))
     84#define BLK_TA_INSERT		(__BLK_TA_INSERT | BLK_TC_ACT(BLK_TC_QUEUE))
     85#define BLK_TA_SPLIT		(__BLK_TA_SPLIT)
     86#define BLK_TA_BOUNCE		(__BLK_TA_BOUNCE)
     87#define BLK_TA_REMAP		(__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))
     88#define BLK_TA_ABORT		(__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE))
     89#define BLK_TA_DRV_DATA	(__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA))
     90
     91#define BLK_TN_PROCESS		(__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
     92#define BLK_TN_TIMESTAMP	(__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
     93#define BLK_TN_MESSAGE		(__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY))
     94
     95#define BLK_IO_TRACE_MAGIC	0x65617400
     96#define BLK_IO_TRACE_VERSION	0x07
     97
     98/*
     99 * The trace itself
    100 */
    101struct blk_io_trace {
    102	__u32 magic;		/* MAGIC << 8 | version */
    103	__u32 sequence;		/* event number */
    104	__u64 time;		/* in nanoseconds */
    105	__u64 sector;		/* disk offset */
    106	__u32 bytes;		/* transfer length */
    107	__u32 action;		/* what happened */
    108	__u32 pid;		/* who did it */
    109	__u32 device;		/* device number */
    110	__u32 cpu;		/* on what cpu did it happen */
    111	__u16 error;		/* completion error */
    112	__u16 pdu_len;		/* length of data after this trace */
    113	/* cgroup id will be stored here if exists */
    114};
    115
    116/*
    117 * The remap event
    118 */
    119struct blk_io_trace_remap {
    120	__be32 device_from;
    121	__be32 device_to;
    122	__be64 sector_from;
    123};
    124
    125enum {
    126	Blktrace_setup = 1,
    127	Blktrace_running,
    128	Blktrace_stopped,
    129};
    130
    131#define BLKTRACE_BDEV_SIZE	32
    132
    133/*
    134 * User setup structure passed with BLKTRACESETUP
    135 */
    136struct blk_user_trace_setup {
    137	char name[BLKTRACE_BDEV_SIZE];	/* output */
    138	__u16 act_mask;			/* input */
    139	__u32 buf_size;			/* input */
    140	__u32 buf_nr;			/* input */
    141	__u64 start_lba;
    142	__u64 end_lba;
    143	__u32 pid;
    144};
    145
    146#endif /* _UAPIBLKTRACE_H */