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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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2abd2de712
This adds four tracepoints to nbd, enabling separate tracing of payload and header sending/receipt. In the send path for headers that have already been sent, we also explicitly initialize the handle so it can be referenced by the later tracepoint. Signed-off-by: Andrew Hall <hall@fb.com> Signed-off-by: Matt Mullins <mmullins@fb.com> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
107 lines
2.1 KiB
C
107 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM nbd
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#if !defined(_TRACE_NBD_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_NBD_H
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(nbd_transport_event,
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TP_PROTO(struct request *req, u64 handle),
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TP_ARGS(req, handle),
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TP_STRUCT__entry(
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__field(struct request *, req)
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__field(u64, handle)
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),
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TP_fast_assign(
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__entry->req = req;
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__entry->handle = handle;
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),
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TP_printk(
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"nbd transport event: request %p, handle 0x%016llx",
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__entry->req,
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__entry->handle
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)
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);
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DEFINE_EVENT(nbd_transport_event, nbd_header_sent,
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TP_PROTO(struct request *req, u64 handle),
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TP_ARGS(req, handle)
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);
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DEFINE_EVENT(nbd_transport_event, nbd_payload_sent,
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TP_PROTO(struct request *req, u64 handle),
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TP_ARGS(req, handle)
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);
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DEFINE_EVENT(nbd_transport_event, nbd_header_received,
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TP_PROTO(struct request *req, u64 handle),
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TP_ARGS(req, handle)
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);
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DEFINE_EVENT(nbd_transport_event, nbd_payload_received,
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TP_PROTO(struct request *req, u64 handle),
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TP_ARGS(req, handle)
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);
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DECLARE_EVENT_CLASS(nbd_send_request,
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TP_PROTO(struct nbd_request *nbd_request, int index,
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struct request *rq),
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TP_ARGS(nbd_request, index, rq),
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TP_STRUCT__entry(
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__field(struct nbd_request *, nbd_request)
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__field(u64, dev_index)
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__field(struct request *, request)
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),
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TP_fast_assign(
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__entry->nbd_request = 0;
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__entry->dev_index = index;
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__entry->request = rq;
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),
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TP_printk("nbd%lld: request %p", __entry->dev_index, __entry->request)
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);
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#ifdef DEFINE_EVENT_WRITABLE
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#undef NBD_DEFINE_EVENT
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#define NBD_DEFINE_EVENT(template, call, proto, args, size) \
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DEFINE_EVENT_WRITABLE(template, call, PARAMS(proto), \
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PARAMS(args), size)
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#else
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#undef NBD_DEFINE_EVENT
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#define NBD_DEFINE_EVENT(template, call, proto, args, size) \
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DEFINE_EVENT(template, call, PARAMS(proto), PARAMS(args))
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#endif
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NBD_DEFINE_EVENT(nbd_send_request, nbd_send_request,
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TP_PROTO(struct nbd_request *nbd_request, int index,
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struct request *rq),
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TP_ARGS(nbd_request, index, rq),
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sizeof(struct nbd_request)
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);
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#endif
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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