fs/iomap/trace.h
Source file repositories/reference/linux-study-clean/fs/iomap/trace.h
File Facts
- System
- Linux kernel
- Corpus path
fs/iomap/trace.h- Extension
.h- Size
- 9784 bytes
- Lines
- 334
- Domain
- Core OS
- Bucket
- VFS And Filesystem Core
- Inferred role
- Core OS: implementation source
- Status
- source implementation candidate
Why This File Exists
Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/tracepoint.htrace/define_trace.h
Detected Declarations
struct inode
Annotated Snippet
#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_writeback_folio);
DEFINE_RANGE_EVENT(iomap_release_folio);
DEFINE_RANGE_EVENT(iomap_invalidate_folio);
DEFINE_RANGE_EVENT(iomap_dio_invalidate_fail);
DEFINE_RANGE_EVENT(iomap_dio_rw_queued);
DEFINE_RANGE_EVENT(iomap_zero_iter);
#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" }, \
{ IOMAP_OVERWRITE_ONLY, "OVERWRITE_ONLY" }, \
{ IOMAP_UNSHARE, "UNSHARE" }, \
{ IOMAP_DAX, "DAX" }, \
{ IOMAP_ATOMIC, "ATOMIC" }, \
Annotation
- Immediate include surface: `linux/tracepoint.h`, `trace/define_trace.h`.
- Detected declarations: `struct inode`.
- Atlas domain: Core OS / VFS And Filesystem Core.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.