original development tree for Linux kernel GTP module; now long in mainline.
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#undef TRACE_SYSTEM
#define TRACE_SYSTEM block
#if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_BLOCK_H
#include <linux/blktrace_api.h>
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
#include <linux/tracepoint.h>
#define RWBS_LEN 8
DECLARE_EVENT_CLASS(block_buffer,
TP_PROTO(struct buffer_head *bh),
TP_ARGS(bh),
TP_STRUCT__entry (
__field( dev_t, dev )
__field( sector_t, sector )
__field( size_t, size )
),
TP_fast_assign(
__entry->dev = bh->b_bdev->bd_dev;
__entry->sector = bh->b_blocknr;
__entry->size = bh->b_size;
),
TP_printk("%d,%d sector=%llu size=%zu",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->sector, __entry->size
)
);
/**
* block_touch_buffer - mark a buffer accessed
* @bh: buffer_head being touched
*
* Called from touch_buffer().
*/
DEFINE_EVENT(block_buffer, block_touch_buffer,
TP_PROTO(struct buffer_head *bh),
TP_ARGS(bh)
);
/**
* block_dirty_buffer - mark a buffer dirty
* @bh: buffer_head being dirtied
*
* Called from mark_buffer_dirty().
*/
DEFINE_EVENT(block_buffer, block_dirty_buffer,
TP_PROTO(struct buffer_head *bh),
TP_ARGS(bh)
);
DECLARE_EVENT_CLASS(block_rq_with_error,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_ARGS(q, rq),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__field( int, errors )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
),
TP_fast_assign(
__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
__entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
0 : blk_rq_pos(rq);
__entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
0 : blk_rq_sectors(rq);
__entry->errors = rq->errors;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
blk_dump_cmd(__get_str(cmd), rq);
),
TP_printk("%d,%d %s (%s) %llu + %u [%d]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->errors)
);
/**
* block_rq_abort - abort block operation request
* @q: queue containing the block operation request
* @rq: block IO operation request
*
* Called immediately after pending block IO operation request @rq in
* queue @q is aborted. The fields in the operation request @rq
* can be examined to determine which device and sectors the pending
* operation would access.
*/
DEFINE_EVENT(block_rq_with_error, block_rq_abort,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_ARGS(q, rq)
);
/**
* block_rq_requeue - place block IO request back on a queue
* @q: queue holding operation
* @rq: block IO operation request
*
* The block operation request @rq is being placed back into queue
* @q. For some reason the request was not completed and needs to be
* put back in the queue.
*/
DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_ARGS(q, rq)
);
/**
* block_rq_complete - block IO operation completed by device driver
* @q: queue containing the block operation request
* @rq: block operations request
*
* The block_rq_complete tracepoint event indicates that some portion
* of operation request has been completed by the device driver. If
* the @rq->bio is %NULL, then there is absolutely no additional work to
* do for the request. If @rq->bio is non-NULL then there is
* additional work required to complete the request.
*/
DEFINE_EVENT(block_rq_with_error, block_rq_complete,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_ARGS(q, rq)
);
DECLARE_EVENT_CLASS(block_rq,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_ARGS(q, rq),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__field( unsigned int, bytes )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
__dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
),
TP_fast_assign(
__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
__entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
0 : blk_rq_pos(rq);
__entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
0 : blk_rq_sectors(rq);
__entry->bytes = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_bytes(rq) : 0;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
blk_dump_cmd(__get_str(cmd), rq);
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __entry->bytes, __get_str(cmd),
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->comm)
);
/**
* block_rq_insert - insert block operation request into queue
* @q: target queue
* @rq: block IO operation request
*
* Called immediately before block operation request @rq is inserted
* into queue @q. The fields in the operation request @rq struct can
* be examined to determine which device and sectors the pending
* operation would access.
*/
DEFINE_EVENT(block_rq, block_rq_insert,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_ARGS(q, rq)
);
/**
* block_rq_issue - issue pending block IO request operation to device driver
* @q: queue holding operation
* @rq: block IO operation operation request
*
* Called when block operation request @rq from queue @q is sent to a
* device driver for processing.
*/
DEFINE_EVENT(block_rq, block_rq_issue,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_ARGS(q, rq)
);
/**
* block_bio_bounce - used bounce buffer when processing block operation
* @q: queue holding the block operation
* @bio: block operation
*
* A bounce buffer was used to handle the block operation @bio in @q.
* This occurs when hardware limitations prevent a direct transfer of
* data between the @bio data memory area and the IO device. Use of a
* bounce buffer requires extra copying of data and decreases
* performance.
*/
TRACE_EVENT(block_bio_bounce,
TP_PROTO(struct request_queue *q, struct bio *bio),
TP_ARGS(q, bio),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
),
TP_fast_assign(
__entry->dev = bio->bi_bdev ?
bio->bi_bdev->bd_dev : 0;
__entry->sector = bio->bi_sector;
__entry->nr_sector = bio_sectors(bio);
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
TP_printk("%d,%d %s %llu + %u [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->comm)
);
/**
* block_bio_complete - completed all work on the block operation
* @q: queue holding the block operation
* @bio: block operation completed
* @error: io error value
*
* This tracepoint indicates there is no further work to do on this
* block IO operation @bio.
*/
TRACE_EVENT(block_bio_complete,
TP_PROTO(struct request_queue *q, struct bio *bio, int error),
TP_ARGS(q, bio, error),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned, nr_sector )
__field( int, error )
__array( char, rwbs, RWBS_LEN)
),
TP_fast_assign(
__entry->dev = bio->bi_bdev->bd_dev;
__entry->sector = bio->bi_sector;
__entry->nr_sector = bio_sectors(bio);
__entry->error = error;
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
),
TP_printk("%d,%d %s %llu + %u [%d]",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->error)
);
DECLARE_EVENT_CLASS(block_bio_merge,
TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
TP_ARGS(q, rq, bio),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
),
TP_fast_assign(
__entry->dev = bio->bi_bdev->bd_dev;
__entry->sector = bio->bi_sector;
__entry->nr_sector = bio_sectors(bio);
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
TP_printk("%d,%d %s %llu + %u [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->comm)
);
/**
* block_bio_backmerge - merging block operation to the end of an existing operation
* @q: queue holding operation
* @rq: request bio is being merged into
* @bio: new block operation to merge
*
* Merging block request @bio to the end of an existing block request
* in queue @q.
*/
DEFINE_EVENT(block_bio_merge, block_bio_backmerge,
TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
TP_ARGS(q, rq, bio)
);
/**
* block_bio_frontmerge - merging block operation to the beginning of an existing operation
* @q: queue holding operation
* @rq: request bio is being merged into
* @bio: new block operation to merge
*
* Merging block IO operation @bio to the beginning of an existing block
* operation in queue @q.
*/
DEFINE_EVENT(block_bio_merge, block_bio_frontmerge,
TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
TP_ARGS(q, rq, bio)
);
/**
* block_bio_queue - putting new block IO operation in queue
* @q: queue holding operation
* @bio: new block operation
*
* About to place the block IO operation @bio into queue @q.
*/
TRACE_EVENT(block_bio_queue,
TP_PROTO(struct request_queue *q, struct bio *bio),
TP_ARGS(q, bio),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
),
TP_fast_assign(
__entry->dev = bio->bi_bdev->bd_dev;
__entry->sector = bio->bi_sector;
__entry->nr_sector = bio_sectors(bio);
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
TP_printk("%d,%d %s %llu + %u [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->comm)
);
DECLARE_EVENT_CLASS(block_get_rq,
TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
TP_ARGS(q, bio, rw),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
),
TP_fast_assign(
__entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
__entry->sector = bio ? bio->bi_sector : 0;
__entry->nr_sector = bio ? bio_sectors(bio) : 0;
blk_fill_rwbs(__entry->rwbs,
bio ? bio->bi_rw : 0, __entry->nr_sector);
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
TP_printk("%d,%d %s %llu + %u [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->comm)
);
/**
* block_getrq - get a free request entry in queue for block IO operations
* @q: queue for operations
* @bio: pending block IO operation
* @rw: low bit indicates a read (%0) or a write (%1)
*
* A request struct for queue @q has been allocated to handle the
* block IO operation @bio.
*/
DEFINE_EVENT(block_get_rq, block_getrq,
TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
TP_ARGS(q, bio, rw)
);
/**
* block_sleeprq - waiting to get a free request entry in queue for block IO operation
* @q: queue for operation
* @bio: pending block IO operation
* @rw: low bit indicates a read (%0) or a write (%1)
*
* In the case where a request struct cannot be provided for queue @q
* the process needs to wait for an request struct to become
* available. This tracepoint event is generated each time the
* process goes to sleep waiting for request struct become available.
*/
DEFINE_EVENT(block_get_rq, block_sleeprq,
TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
TP_ARGS(q, bio, rw)
);
/**
* block_plug - keep operations requests in request queue
* @q: request queue to plug
*
* Plug the request queue @q. Do not allow block operation requests
* to be sent to the device driver. Instead, accumulate requests in
* the queue to improve throughput performance of the block device.
*/
TRACE_EVENT(block_plug,
TP_PROTO(struct request_queue *q),
TP_ARGS(q),
TP_STRUCT__entry(
__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
* @q: queue containing the bio
* @bio: block operation being split
* @new_sector: The starting sector for the new bio
*
* The bio request @bio in request queue @q 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 limitation
* such as operation crossing device boundaries in a RAID system.
*/
TRACE_EVENT(block_split,
TP_PROTO(struct request_queue *q, struct bio *bio,
unsigned int new_sector),
TP_ARGS(q, 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->bi_bdev->bd_dev;
__entry->sector = bio->bi_sector;
__entry->new_sector = new_sector;
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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
* @q: queue holding the operation
* @bio: revised operation
* @dev: 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 request_queue *q, struct bio *bio, dev_t dev,
sector_t from),
TP_ARGS(q, 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->bi_bdev->bd_dev;
__entry->sector = bio->bi_sector;
__entry->nr_sector = bio_sectors(bio);
__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 )
__field( unsigned int, nr_bios )
__array( char, rwbs, RWBS_LEN)
),
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;
__entry->nr_bios = blk_rq_count_bios(rq);
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
),
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>