linux/fs/iomap/trace.h
Darrick J. Wong 03b8df8d43 iomap: standardize tracepoint formatting and storage
Print all the offset, pos, and length quantities in hexadecimal.  While
we're at it, update the types of the tracepoint structure fields to
match the types of the values being recorded in them.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
2021-08-26 09:18:53 -07:00

191 lines
5.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2009-2021 Christoph Hellwig
*
* NOTE: none of these tracepoints shall be considered a stable kernel ABI
* as they can change at any time.
*
* Current conventions for printing numbers measuring specific units:
*
* offset: byte offset into a subcomponent of a file operation
* pos: file offset, in bytes
* length: length of a file operation, in bytes
* ino: inode number
*
* Numbers describing space allocations should be formatted in hexadecimal.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM iomap
#if !defined(_IOMAP_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
#define _IOMAP_TRACE_H
#include <linux/tracepoint.h>
struct inode;
DECLARE_EVENT_CLASS(iomap_readpage_class,
TP_PROTO(struct inode *inode, int nr_pages),
TP_ARGS(inode, nr_pages),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(int, nr_pages)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->nr_pages = nr_pages;
),
TP_printk("dev %d:%d ino 0x%llx nr_pages %d",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->nr_pages)
)
#define DEFINE_READPAGE_EVENT(name) \
DEFINE_EVENT(iomap_readpage_class, name, \
TP_PROTO(struct inode *inode, int nr_pages), \
TP_ARGS(inode, nr_pages))
DEFINE_READPAGE_EVENT(iomap_readpage);
DEFINE_READPAGE_EVENT(iomap_readahead);
DECLARE_EVENT_CLASS(iomap_range_class,
TP_PROTO(struct inode *inode, loff_t off, u64 len),
TP_ARGS(inode, off, len),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(loff_t, size)
__field(loff_t, offset)
__field(u64, length)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->size = i_size_read(inode);
__entry->offset = off;
__entry->length = len;
),
TP_printk("dev %d:%d ino 0x%llx size 0x%llx offset 0x%llx length 0x%llx",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->size,
__entry->offset,
__entry->length)
)
#define DEFINE_RANGE_EVENT(name) \
DEFINE_EVENT(iomap_range_class, name, \
TP_PROTO(struct inode *inode, loff_t off, u64 len),\
TP_ARGS(inode, off, len))
DEFINE_RANGE_EVENT(iomap_writepage);
DEFINE_RANGE_EVENT(iomap_releasepage);
DEFINE_RANGE_EVENT(iomap_invalidatepage);
DEFINE_RANGE_EVENT(iomap_dio_invalidate_fail);
#define IOMAP_TYPE_STRINGS \
{ IOMAP_HOLE, "HOLE" }, \
{ IOMAP_DELALLOC, "DELALLOC" }, \
{ IOMAP_MAPPED, "MAPPED" }, \
{ IOMAP_UNWRITTEN, "UNWRITTEN" }, \
{ IOMAP_INLINE, "INLINE" }
#define IOMAP_FLAGS_STRINGS \
{ IOMAP_WRITE, "WRITE" }, \
{ IOMAP_ZERO, "ZERO" }, \
{ IOMAP_REPORT, "REPORT" }, \
{ IOMAP_FAULT, "FAULT" }, \
{ IOMAP_DIRECT, "DIRECT" }, \
{ IOMAP_NOWAIT, "NOWAIT" }
#define IOMAP_F_FLAGS_STRINGS \
{ IOMAP_F_NEW, "NEW" }, \
{ IOMAP_F_DIRTY, "DIRTY" }, \
{ IOMAP_F_SHARED, "SHARED" }, \
{ IOMAP_F_MERGED, "MERGED" }, \
{ IOMAP_F_BUFFER_HEAD, "BH" }, \
{ IOMAP_F_SIZE_CHANGED, "SIZE_CHANGED" }
DECLARE_EVENT_CLASS(iomap_class,
TP_PROTO(struct inode *inode, struct iomap *iomap),
TP_ARGS(inode, iomap),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(u64, addr)
__field(loff_t, offset)
__field(u64, length)
__field(u16, type)
__field(u16, flags)
__field(dev_t, bdev)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->addr = iomap->addr;
__entry->offset = iomap->offset;
__entry->length = iomap->length;
__entry->type = iomap->type;
__entry->flags = iomap->flags;
__entry->bdev = iomap->bdev ? iomap->bdev->bd_dev : 0;
),
TP_printk("dev %d:%d ino 0x%llx bdev %d:%d addr 0x%llx offset 0x%llx "
"length 0x%llx type %s flags %s",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
MAJOR(__entry->bdev), MINOR(__entry->bdev),
__entry->addr,
__entry->offset,
__entry->length,
__print_symbolic(__entry->type, IOMAP_TYPE_STRINGS),
__print_flags(__entry->flags, "|", IOMAP_F_FLAGS_STRINGS))
)
#define DEFINE_IOMAP_EVENT(name) \
DEFINE_EVENT(iomap_class, name, \
TP_PROTO(struct inode *inode, struct iomap *iomap), \
TP_ARGS(inode, iomap))
DEFINE_IOMAP_EVENT(iomap_iter_dstmap);
DEFINE_IOMAP_EVENT(iomap_iter_srcmap);
TRACE_EVENT(iomap_iter,
TP_PROTO(struct iomap_iter *iter, const void *ops,
unsigned long caller),
TP_ARGS(iter, ops, caller),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u64, ino)
__field(loff_t, pos)
__field(u64, length)
__field(unsigned int, flags)
__field(const void *, ops)
__field(unsigned long, caller)
),
TP_fast_assign(
__entry->dev = iter->inode->i_sb->s_dev;
__entry->ino = iter->inode->i_ino;
__entry->pos = iter->pos;
__entry->length = iomap_length(iter);
__entry->flags = iter->flags;
__entry->ops = ops;
__entry->caller = caller;
),
TP_printk("dev %d:%d ino 0x%llx pos 0x%llx length 0x%llx flags %s (0x%x) ops %ps caller %pS",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->pos,
__entry->length,
__print_flags(__entry->flags, "|", IOMAP_FLAGS_STRINGS),
__entry->flags,
__entry->ops,
(void *)__entry->caller)
);
#endif /* _IOMAP_TRACE_H */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace
#include <trace/define_trace.h>