drivers/block/rnbd/rnbd-srv-trace.h

Source file repositories/reference/linux-study-clean/drivers/block/rnbd/rnbd-srv-trace.h

File Facts

System
Linux kernel
Corpus path
drivers/block/rnbd/rnbd-srv-trace.h
Extension
.h
Size
4239 bytes
Lines
190
Domain
Driver Families
Bucket
drivers/block
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#undef TRACE_SYSTEM
#define TRACE_SYSTEM rnbd_srv

#if !defined(_TRACE_RNBD_SRV_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_RNBD_SRV_H

#include <linux/tracepoint.h>

struct rnbd_srv_session;
struct rtrs_srv_op;

DECLARE_EVENT_CLASS(rnbd_srv_link_class,
	TP_PROTO(struct rnbd_srv_session *srv),

	TP_ARGS(srv),

	TP_STRUCT__entry(
		__field(int, qdepth)
		__string(sessname, srv->sessname)
	),

	TP_fast_assign(
		__entry->qdepth = srv->queue_depth;
		__assign_str(sessname);
	),

	TP_printk("sessname: %s qdepth: %d",
		   __get_str(sessname),
		   __entry->qdepth
	)
);

#define DEFINE_LINK_EVENT(name) \
DEFINE_EVENT(rnbd_srv_link_class, name, \
	TP_PROTO(struct rnbd_srv_session *srv), \
	TP_ARGS(srv))

DEFINE_LINK_EVENT(create_sess);
DEFINE_LINK_EVENT(destroy_sess);

TRACE_EVENT(process_rdma,
	TP_PROTO(struct rnbd_srv_session *srv,
		 const struct rnbd_msg_io *msg,
		 struct rtrs_srv_op *id,
		 u32 datalen,
		 size_t usrlen),

	TP_ARGS(srv, msg, id, datalen, usrlen),

	TP_STRUCT__entry(
		__string(sessname, srv->sessname)
		__field(u8, dir)
		__field(u8, ver)
		__field(u32, device_id)
		__field(u64, sector)
		__field(u32, flags)
		__field(u32, bi_size)
		__field(u16, ioprio)
		__field(u32, datalen)
		__field(size_t, usrlen)
	),

	TP_fast_assign(
		__assign_str(sessname);
		__entry->dir = id->dir;
		__entry->ver = srv->ver;
		__entry->device_id = le32_to_cpu(msg->device_id);
		__entry->sector = le64_to_cpu(msg->sector);
		__entry->bi_size = le32_to_cpu(msg->bi_size);
		__entry->flags = le32_to_cpu(msg->rw);
		__entry->ioprio = le16_to_cpu(msg->prio);
		__entry->datalen = datalen;
		__entry->usrlen = usrlen;
	),

	TP_printk("I/O req: sess: %s, type: %s, ver: %d, devid: %u, sector: %llu, bsize: %u, flags: %u, ioprio: %d, datalen: %u, usrlen: %zu",
		   __get_str(sessname),
		   __print_symbolic(__entry->dir,
			 { READ,  "READ" },
			 { WRITE, "WRITE" }),
		   __entry->ver,
		   __entry->device_id,
		   __entry->sector,
		   __entry->bi_size,
		   __entry->flags,
		   __entry->ioprio,
		   __entry->datalen,
		   __entry->usrlen
	)
);

Annotation

Implementation Notes