iomap: trace iomap_appply results (6334b91e) · Commits · 戴 / test

fs/iomap/apply.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@
		#include <linux/compiler.h>
		#include <linux/fs.h>
		#include <linux/iomap.h>
		#include "trace.h"

		/*
		* Execute a iomap write on a segment of the mapping that spans a
		@@ -28,6 +29,8 @@ iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags,
		loff_t written = 0, ret;
		u64 end;

		trace_iomap_apply(inode, pos, length, flags, ops, actor, _RET_IP_);

		/*
		* Need to map a range from start position for length bytes. This can
		* span multiple pages - it is only guaranteed to return a range of a
		@@ -48,6 +51,10 @@ iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags,
		if (WARN_ON(iomap.length == 0))
		return -EIO;

		trace_iomap_apply_dstmap(inode, &iomap);
		if (srcmap.type != IOMAP_HOLE)
		trace_iomap_apply_srcmap(inode, &srcmap);

		/*
		* Cut down the length to the one actually provided by the filesystem,
		* as it might not be able to give us the whole size that we requested.

fs/iomap/trace.h

+103 −0

Original line number	Diff line number	Diff line
		@@ -80,6 +80,109 @@ DEFINE_PAGE_EVENT(iomap_writepage);
		DEFINE_PAGE_EVENT(iomap_releasepage);
		DEFINE_PAGE_EVENT(iomap_invalidatepage);

		#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 %lld offset %lld "
		"length %llu 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_apply_dstmap);
		DEFINE_IOMAP_EVENT(iomap_apply_srcmap);

		TRACE_EVENT(iomap_apply,
		TP_PROTO(struct inode *inode, loff_t pos, loff_t length,
		unsigned int flags, const void ops, void actor,
		unsigned long caller),
		TP_ARGS(inode, pos, length, flags, ops, actor, caller),
		TP_STRUCT__entry(
		__field(dev_t, dev)
		__field(u64, ino)
		__field(loff_t, pos)
		__field(loff_t, length)
		__field(unsigned int, flags)
		__field(const void *, ops)
		__field(void *, actor)
		__field(unsigned long, caller)
		),
		TP_fast_assign(
		__entry->dev = inode->i_sb->s_dev;
		__entry->ino = inode->i_ino;
		__entry->pos = pos;
		__entry->length = length;
		__entry->flags = flags;
		__entry->ops = ops;
		__entry->actor = actor;
		__entry->caller = caller;
		),
		TP_printk("dev %d:%d ino 0x%llx pos %lld length %lld flags %s (0x%x) "
		"ops %ps caller %pS actor %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,
		__entry->actor)
		);

		#endif /* _IOMAP_TRACE_H */

		#undef TRACE_INCLUDE_PATH

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