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https://github.com/torvalds/linux.git
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b7908c1035
The "error" field in block_bio_complete is not assigned, leaving the memory area uninitialized (keeping garbage data). Pass an additional tracepoint argument to this event to initialize this field. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> CC: Steven Rostedt <rostedt@goodmis.org> CC: Frederic Weisbecker <fweisbec@gmail.com> CC: Ingo Molnar <mingo@elte.hu> CC: Thomas Gleixner <tglx@linutronix.de> CC: Li Zefan <lizf@cn.fujitsu.com> CC: Alan.Brunelle@hp.com Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
582 lines
16 KiB
C
582 lines
16 KiB
C
#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/tracepoint.h>
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DECLARE_EVENT_CLASS(block_rq_with_error,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, 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( int, errors )
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__array( char, rwbs, 6 )
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__dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
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),
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TP_fast_assign(
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__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
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__entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_pos(rq);
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__entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_sectors(rq);
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__entry->errors = rq->errors;
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blk_fill_rwbs_rq(__entry->rwbs, rq);
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blk_dump_cmd(__get_str(cmd), rq);
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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->errors)
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);
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/**
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* block_rq_abort - abort block operation request
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* @q: queue containing the block operation request
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* @rq: block IO operation request
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*
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* Called immediately after pending block IO operation request @rq in
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* queue @q is aborted. The fields in the operation request @rq
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* can 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_with_error, block_rq_abort,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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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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* @q: queue holding operation
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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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DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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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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* @q: queue containing the block operation request
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* @rq: block operations request
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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_with_error, block_rq_complete,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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);
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DECLARE_EVENT_CLASS(block_rq,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, 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, 6 )
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__array( char, comm, TASK_COMM_LEN )
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__dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
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),
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TP_fast_assign(
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__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
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__entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_pos(rq);
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__entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_sectors(rq);
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__entry->bytes = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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blk_rq_bytes(rq) : 0;
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blk_fill_rwbs_rq(__entry->rwbs, rq);
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blk_dump_cmd(__get_str(cmd), rq);
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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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* @q: target 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_queue *q, struct request *rq),
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TP_ARGS(q, 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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* @q: queue holding operation
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* @rq: block IO operation 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_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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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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* @q: queue holding the 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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TRACE_EVENT(block_bio_bounce,
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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 int, nr_sector )
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__array( char, rwbs, 6 )
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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->bi_bdev ?
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bio->bi_bdev->bd_dev : 0;
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__entry->sector = bio->bi_sector;
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__entry->nr_sector = bio->bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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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_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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* @error: io error value
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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, int error),
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TP_ARGS(q, bio, error),
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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, 6 )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->sector = bio->bi_sector;
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__entry->nr_sector = bio->bi_size >> 9;
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__entry->error = error;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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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 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 int, nr_sector )
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__array( char, rwbs, 6 )
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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->bi_bdev->bd_dev;
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__entry->sector = bio->bi_sector;
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__entry->nr_sector = bio->bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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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_backmerge - merging block operation to the end of an existing operation
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* @q: queue holding 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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* in queue @q.
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*/
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DEFINE_EVENT(block_bio, block_bio_backmerge,
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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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);
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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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* @q: queue holding 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
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* operation in queue @q.
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*/
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DEFINE_EVENT(block_bio, block_bio_frontmerge,
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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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);
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/**
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* block_bio_queue - putting new block IO operation in queue
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* @q: queue holding operation
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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 request_queue *q, struct bio *bio),
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TP_ARGS(q, bio)
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);
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DECLARE_EVENT_CLASS(block_get_rq,
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TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
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TP_ARGS(q, bio, rw),
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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, 6 )
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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 ? bio->bi_bdev->bd_dev : 0;
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__entry->sector = bio ? bio->bi_sector : 0;
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__entry->nr_sector = bio ? bio->bi_size >> 9 : 0;
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blk_fill_rwbs(__entry->rwbs,
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bio ? bio->bi_rw : 0, __entry->nr_sector);
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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_getrq - get a free request entry in queue for block IO operations
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* @q: queue for operations
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* @bio: pending block IO operation
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* @rw: low bit indicates a read (%0) or a write (%1)
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*
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* A request struct for queue @q has been allocated to handle the
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* block IO operation @bio.
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*/
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DEFINE_EVENT(block_get_rq, block_getrq,
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TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
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TP_ARGS(q, bio, rw)
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);
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/**
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* block_sleeprq - waiting to get a free request entry in queue for block IO operation
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* @q: queue for operation
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* @bio: pending block IO operation
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* @rw: low bit indicates a read (%0) or a write (%1)
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*
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* In the case where a request struct cannot be provided for queue @q
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* the process needs to wait for an request struct to become
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* available. This tracepoint event is generated each time the
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* process goes to sleep waiting for request struct become available.
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*/
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DEFINE_EVENT(block_get_rq, block_sleeprq,
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TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
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TP_ARGS(q, bio, rw)
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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 )
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),
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TP_fast_assign(
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("[%s]", __entry->comm)
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);
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DECLARE_EVENT_CLASS(block_unplug,
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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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__field( int, nr_rq )
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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->nr_rq = q->rq.count[READ] + q->rq.count[WRITE];
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
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);
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/**
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* block_unplug_timer - timed release of operations requests in queue to device driver
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* @q: request queue to unplug
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*
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* Unplug the request queue @q because a timer expired and allow block
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* operation requests to be sent to the device driver.
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*/
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DEFINE_EVENT(block_unplug, block_unplug_timer,
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TP_PROTO(struct request_queue *q),
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TP_ARGS(q)
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);
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/**
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* block_unplug_io - release of operations requests in request queue
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* @q: request queue to unplug
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*
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* Unplug request queue @q because device driver is scheduled to work
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* on elements in the request queue.
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*/
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DEFINE_EVENT(block_unplug, block_unplug_io,
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TP_PROTO(struct request_queue *q),
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TP_ARGS(q)
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);
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/**
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* block_split - split a single bio struct into two bio structs
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* @q: queue containing the bio
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* @bio: block operation being split
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* @new_sector: The starting sector for the new bio
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*
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* The bio request @bio in request queue @q needs to be split into two
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* bio requests. The newly created @bio request starts at
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* @new_sector. This split may be required due to hardware limitation
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* such as operation crossing device boundaries in a RAID system.
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*/
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TRACE_EVENT(block_split,
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TP_PROTO(struct request_queue *q, struct bio *bio,
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unsigned int new_sector),
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TP_ARGS(q, bio, new_sector),
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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( sector_t, new_sector )
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__array( char, rwbs, 6 )
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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->bi_bdev->bd_dev;
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__entry->sector = bio->bi_sector;
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__entry->new_sector = new_sector;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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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 / %llu [%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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(unsigned long long)__entry->new_sector,
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__entry->comm)
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);
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|
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/**
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* block_bio_remap - map request for a logical device to the raw device
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* @q: queue holding the operation
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* @bio: revised operation
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* @dev: device for the operation
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* @from: original sector for the operation
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*
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* An operation for a logical device has been mapped to the
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* raw block device.
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*/
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TRACE_EVENT(block_bio_remap,
|
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|
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TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
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sector_t from),
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|
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TP_ARGS(q, bio, dev, from),
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|
|
|
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, 6 )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = bio->bi_bdev->bd_dev;
|
|
__entry->sector = bio->bi_sector;
|
|
__entry->nr_sector = bio->bi_size >> 9;
|
|
__entry->old_dev = dev;
|
|
__entry->old_sector = from;
|
|
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
|
|
),
|
|
|
|
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
|
|
* @q: queue holding the operation
|
|
* @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_queue *q, struct request *rq, dev_t dev,
|
|
sector_t from),
|
|
|
|
TP_ARGS(q, 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 )
|
|
__array( char, rwbs, 6 )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = disk_devt(rq->rq_disk);
|
|
__entry->sector = blk_rq_pos(rq);
|
|
__entry->nr_sector = blk_rq_sectors(rq);
|
|
__entry->old_dev = dev;
|
|
__entry->old_sector = from;
|
|
blk_fill_rwbs_rq(__entry->rwbs, rq);
|
|
),
|
|
|
|
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)
|
|
);
|
|
|
|
#endif /* _TRACE_BLOCK_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|
|
|