560 lines
14 KiB
C
560 lines
14 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM block
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#if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_BLOCK_H
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#include <linux/blktrace_api.h>
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#include <linux/blkdev.h>
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#include <linux/buffer_head.h>
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#include <linux/tracepoint.h>
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#define RWBS_LEN 8
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DECLARE_EVENT_CLASS(block_buffer,
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TP_PROTO(struct buffer_head *bh),
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TP_ARGS(bh),
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TP_STRUCT__entry (
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( size_t, size )
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),
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TP_fast_assign(
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__entry->dev = bh->b_bdev->bd_dev;
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__entry->sector = bh->b_blocknr;
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__entry->size = bh->b_size;
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),
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TP_printk("%d,%d sector=%llu size=%zu",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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(unsigned long long)__entry->sector, __entry->size
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)
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);
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/**
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* block_touch_buffer - mark a buffer accessed
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* @bh: buffer_head being touched
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*
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* Called from touch_buffer().
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*/
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DEFINE_EVENT(block_buffer, block_touch_buffer,
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TP_PROTO(struct buffer_head *bh),
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TP_ARGS(bh)
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);
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/**
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* block_dirty_buffer - mark a buffer dirty
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* @bh: buffer_head being dirtied
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*
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* Called from mark_buffer_dirty().
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*/
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DEFINE_EVENT(block_buffer, block_dirty_buffer,
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TP_PROTO(struct buffer_head *bh),
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TP_ARGS(bh)
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);
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/**
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* block_rq_requeue - place block IO request back on a queue
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* @rq: block IO operation request
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*
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* The block operation request @rq is being placed back into queue
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* @q. For some reason the request was not completed and needs to be
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* put back in the queue.
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*/
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TRACE_EVENT(block_rq_requeue,
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TP_PROTO(struct request *rq),
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TP_ARGS(rq),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__array( char, rwbs, RWBS_LEN )
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__dynamic_array( char, cmd, 1 )
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),
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TP_fast_assign(
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__entry->dev = rq->q->disk ? disk_devt(rq->q->disk) : 0;
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__entry->sector = blk_rq_trace_sector(rq);
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__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
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blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
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__get_str(cmd)[0] = '\0';
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),
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TP_printk("%d,%d %s (%s) %llu + %u [%d]",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, __get_str(cmd),
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(unsigned long long)__entry->sector,
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__entry->nr_sector, 0)
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);
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DECLARE_EVENT_CLASS(block_rq_completion,
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TP_PROTO(struct request *rq, blk_status_t error, unsigned int nr_bytes),
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TP_ARGS(rq, error, nr_bytes),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__field( int , error )
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__array( char, rwbs, RWBS_LEN )
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__dynamic_array( char, cmd, 1 )
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),
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TP_fast_assign(
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__entry->dev = rq->q->disk ? disk_devt(rq->q->disk) : 0;
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__entry->sector = blk_rq_pos(rq);
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__entry->nr_sector = nr_bytes >> 9;
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__entry->error = blk_status_to_errno(error);
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blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
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__get_str(cmd)[0] = '\0';
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),
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TP_printk("%d,%d %s (%s) %llu + %u [%d]",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, __get_str(cmd),
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->error)
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);
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/**
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* block_rq_complete - block IO operation completed by device driver
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* @rq: block operations request
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* @error: status code
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* @nr_bytes: number of completed bytes
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*
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* The block_rq_complete tracepoint event indicates that some portion
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* of operation request has been completed by the device driver. If
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* the @rq->bio is %NULL, then there is absolutely no additional work to
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* do for the request. If @rq->bio is non-NULL then there is
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* additional work required to complete the request.
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*/
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DEFINE_EVENT(block_rq_completion, block_rq_complete,
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TP_PROTO(struct request *rq, blk_status_t error, unsigned int nr_bytes),
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TP_ARGS(rq, error, nr_bytes)
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);
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/**
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* block_rq_error - block IO operation error reported by device driver
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* @rq: block operations request
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* @error: status code
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* @nr_bytes: number of completed bytes
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*
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* The block_rq_error tracepoint event indicates that some portion
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* of operation request has failed as reported by the device driver.
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*/
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DEFINE_EVENT(block_rq_completion, block_rq_error,
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TP_PROTO(struct request *rq, blk_status_t error, unsigned int nr_bytes),
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TP_ARGS(rq, error, nr_bytes)
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);
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DECLARE_EVENT_CLASS(block_rq,
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TP_PROTO(struct request *rq),
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TP_ARGS(rq),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__field( unsigned int, bytes )
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__array( char, rwbs, RWBS_LEN )
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__array( char, comm, TASK_COMM_LEN )
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__dynamic_array( char, cmd, 1 )
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),
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TP_fast_assign(
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__entry->dev = rq->q->disk ? disk_devt(rq->q->disk) : 0;
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__entry->sector = blk_rq_trace_sector(rq);
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__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
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__entry->bytes = blk_rq_bytes(rq);
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blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
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__get_str(cmd)[0] = '\0';
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, __entry->bytes, __get_str(cmd),
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->comm)
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);
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/**
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* block_rq_insert - insert block operation request into queue
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* @rq: block IO operation request
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*
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* Called immediately before block operation request @rq is inserted
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* into queue @q. The fields in the operation request @rq struct can
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* be examined to determine which device and sectors the pending
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* operation would access.
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*/
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DEFINE_EVENT(block_rq, block_rq_insert,
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TP_PROTO(struct request *rq),
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TP_ARGS(rq)
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);
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/**
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* block_rq_issue - issue pending block IO request operation to device driver
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* @rq: block IO operation request
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*
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* Called when block operation request @rq from queue @q is sent to a
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* device driver for processing.
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*/
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DEFINE_EVENT(block_rq, block_rq_issue,
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TP_PROTO(struct request *rq),
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TP_ARGS(rq)
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);
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/**
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* block_rq_merge - merge request with another one in the elevator
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* @rq: block IO operation request
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*
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* Called when block operation request @rq from queue @q is merged to another
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* request queued in the elevator.
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*/
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DEFINE_EVENT(block_rq, block_rq_merge,
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TP_PROTO(struct request *rq),
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TP_ARGS(rq)
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);
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/**
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* block_bio_complete - completed all work on the block operation
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* @q: queue holding the block operation
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* @bio: block operation completed
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*
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* This tracepoint indicates there is no further work to do on this
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* block IO operation @bio.
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*/
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TRACE_EVENT(block_bio_complete,
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TP_PROTO(struct request_queue *q, struct bio *bio),
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TP_ARGS(q, bio),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned, nr_sector )
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__field( int, error )
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__array( char, rwbs, RWBS_LEN)
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),
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TP_fast_assign(
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__entry->dev = bio_dev(bio);
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__entry->sector = bio->bi_iter.bi_sector;
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__entry->nr_sector = bio_sectors(bio);
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__entry->error = blk_status_to_errno(bio->bi_status);
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blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
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),
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TP_printk("%d,%d %s %llu + %u [%d]",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->error)
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);
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DECLARE_EVENT_CLASS(block_bio,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__array( char, rwbs, RWBS_LEN )
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__array( char, comm, TASK_COMM_LEN )
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),
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TP_fast_assign(
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__entry->dev = bio_dev(bio);
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__entry->sector = bio->bi_iter.bi_sector;
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__entry->nr_sector = bio_sectors(bio);
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blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("%d,%d %s %llu + %u [%s]",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->comm)
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);
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/**
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* block_bio_bounce - used bounce buffer when processing block operation
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* @bio: block operation
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*
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* A bounce buffer was used to handle the block operation @bio in @q.
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* This occurs when hardware limitations prevent a direct transfer of
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* data between the @bio data memory area and the IO device. Use of a
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* bounce buffer requires extra copying of data and decreases
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* performance.
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*/
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DEFINE_EVENT(block_bio, block_bio_bounce,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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/**
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* block_bio_backmerge - merging block operation to the end of an existing operation
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* @bio: new block operation to merge
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*
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* Merging block request @bio to the end of an existing block request.
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*/
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DEFINE_EVENT(block_bio, block_bio_backmerge,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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/**
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* block_bio_frontmerge - merging block operation to the beginning of an existing operation
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* @bio: new block operation to merge
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*
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* Merging block IO operation @bio to the beginning of an existing block request.
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*/
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DEFINE_EVENT(block_bio, block_bio_frontmerge,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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/**
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* block_bio_queue - putting new block IO operation in queue
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* @bio: new block operation
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*
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* About to place the block IO operation @bio into queue @q.
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*/
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DEFINE_EVENT(block_bio, block_bio_queue,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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/**
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* block_getrq - get a free request entry in queue for block IO operations
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* @bio: pending block IO operation (can be %NULL)
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*
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* A request struct has been allocated to handle the block IO operation @bio.
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*/
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DEFINE_EVENT(block_bio, block_getrq,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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/**
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* block_plug - keep operations requests in request queue
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* @q: request queue to plug
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*
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* Plug the request queue @q. Do not allow block operation requests
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* to be sent to the device driver. Instead, accumulate requests in
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* the queue to improve throughput performance of the block device.
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*/
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TRACE_EVENT(block_plug,
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TP_PROTO(struct request_queue *q),
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TP_ARGS(q),
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TP_STRUCT__entry(
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||
|
|
__array( char, comm, TASK_COMM_LEN )
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_fast_assign(
|
||
|
|
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_printk("[%s]", __entry->comm)
|
||
|
|
);
|
||
|
|
|
||
|
|
DECLARE_EVENT_CLASS(block_unplug,
|
||
|
|
|
||
|
|
TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
|
||
|
|
|
||
|
|
TP_ARGS(q, depth, explicit),
|
||
|
|
|
||
|
|
TP_STRUCT__entry(
|
||
|
|
__field( int, nr_rq )
|
||
|
|
__array( char, comm, TASK_COMM_LEN )
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_fast_assign(
|
||
|
|
__entry->nr_rq = depth;
|
||
|
|
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* block_unplug - release of operations requests in request queue
|
||
|
|
* @q: request queue to unplug
|
||
|
|
* @depth: number of requests just added to the queue
|
||
|
|
* @explicit: whether this was an explicit unplug, or one from schedule()
|
||
|
|
*
|
||
|
|
* Unplug request queue @q because device driver is scheduled to work
|
||
|
|
* on elements in the request queue.
|
||
|
|
*/
|
||
|
|
DEFINE_EVENT(block_unplug, block_unplug,
|
||
|
|
|
||
|
|
TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
|
||
|
|
|
||
|
|
TP_ARGS(q, depth, explicit)
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* block_split - split a single bio struct into two bio structs
|
||
|
|
* @bio: block operation being split
|
||
|
|
* @new_sector: The starting sector for the new bio
|
||
|
|
*
|
||
|
|
* The bio request @bio needs to be split into two bio requests. The newly
|
||
|
|
* created @bio request starts at @new_sector. This split may be required due to
|
||
|
|
* hardware limitations such as operation crossing device boundaries in a RAID
|
||
|
|
* system.
|
||
|
|
*/
|
||
|
|
TRACE_EVENT(block_split,
|
||
|
|
|
||
|
|
TP_PROTO(struct bio *bio, unsigned int new_sector),
|
||
|
|
|
||
|
|
TP_ARGS(bio, new_sector),
|
||
|
|
|
||
|
|
TP_STRUCT__entry(
|
||
|
|
__field( dev_t, dev )
|
||
|
|
__field( sector_t, sector )
|
||
|
|
__field( sector_t, new_sector )
|
||
|
|
__array( char, rwbs, RWBS_LEN )
|
||
|
|
__array( char, comm, TASK_COMM_LEN )
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_fast_assign(
|
||
|
|
__entry->dev = bio_dev(bio);
|
||
|
|
__entry->sector = bio->bi_iter.bi_sector;
|
||
|
|
__entry->new_sector = new_sector;
|
||
|
|
blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
|
||
|
|
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_printk("%d,%d %s %llu / %llu [%s]",
|
||
|
|
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
|
||
|
|
(unsigned long long)__entry->sector,
|
||
|
|
(unsigned long long)__entry->new_sector,
|
||
|
|
__entry->comm)
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* block_bio_remap - map request for a logical device to the raw device
|
||
|
|
* @bio: revised operation
|
||
|
|
* @dev: original device for the operation
|
||
|
|
* @from: original sector for the operation
|
||
|
|
*
|
||
|
|
* An operation for a logical device has been mapped to the
|
||
|
|
* raw block device.
|
||
|
|
*/
|
||
|
|
TRACE_EVENT(block_bio_remap,
|
||
|
|
|
||
|
|
TP_PROTO(struct bio *bio, dev_t dev, sector_t from),
|
||
|
|
|
||
|
|
TP_ARGS(bio, dev, from),
|
||
|
|
|
||
|
|
TP_STRUCT__entry(
|
||
|
|
__field( dev_t, dev )
|
||
|
|
__field( sector_t, sector )
|
||
|
|
__field( unsigned int, nr_sector )
|
||
|
|
__field( dev_t, old_dev )
|
||
|
|
__field( sector_t, old_sector )
|
||
|
|
__array( char, rwbs, RWBS_LEN)
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_fast_assign(
|
||
|
|
__entry->dev = bio_dev(bio);
|
||
|
|
__entry->sector = bio->bi_iter.bi_sector;
|
||
|
|
__entry->nr_sector = bio_sectors(bio);
|
||
|
|
__entry->old_dev = dev;
|
||
|
|
__entry->old_sector = from;
|
||
|
|
blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
|
||
|
|
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
|
||
|
|
(unsigned long long)__entry->sector,
|
||
|
|
__entry->nr_sector,
|
||
|
|
MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
|
||
|
|
(unsigned long long)__entry->old_sector)
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* block_rq_remap - map request for a block operation request
|
||
|
|
* @rq: block IO operation request
|
||
|
|
* @dev: device for the operation
|
||
|
|
* @from: original sector for the operation
|
||
|
|
*
|
||
|
|
* The block operation request @rq in @q has been remapped. The block
|
||
|
|
* operation request @rq holds the current information and @from hold
|
||
|
|
* the original sector.
|
||
|
|
*/
|
||
|
|
TRACE_EVENT(block_rq_remap,
|
||
|
|
|
||
|
|
TP_PROTO(struct request *rq, dev_t dev, sector_t from),
|
||
|
|
|
||
|
|
TP_ARGS(rq, dev, from),
|
||
|
|
|
||
|
|
TP_STRUCT__entry(
|
||
|
|
__field( dev_t, dev )
|
||
|
|
__field( sector_t, sector )
|
||
|
|
__field( unsigned int, nr_sector )
|
||
|
|
__field( dev_t, old_dev )
|
||
|
|
__field( sector_t, old_sector )
|
||
|
|
__field( unsigned int, nr_bios )
|
||
|
|
__array( char, rwbs, RWBS_LEN)
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_fast_assign(
|
||
|
|
__entry->dev = disk_devt(rq->q->disk);
|
||
|
|
__entry->sector = blk_rq_pos(rq);
|
||
|
|
__entry->nr_sector = blk_rq_sectors(rq);
|
||
|
|
__entry->old_dev = dev;
|
||
|
|
__entry->old_sector = from;
|
||
|
|
__entry->nr_bios = blk_rq_count_bios(rq);
|
||
|
|
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
|
||
|
|
),
|
||
|
|
|
||
|
|
TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u",
|
||
|
|
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
|
||
|
|
(unsigned long long)__entry->sector,
|
||
|
|
__entry->nr_sector,
|
||
|
|
MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
|
||
|
|
(unsigned long long)__entry->old_sector, __entry->nr_bios)
|
||
|
|
);
|
||
|
|
|
||
|
|
#endif /* _TRACE_BLOCK_H */
|
||
|
|
|
||
|
|
/* This part must be outside protection */
|
||
|
|
#include <trace/define_trace.h>
|
||
|
|
|