From 6268953e8977a23ca7512a2921e82a5d9252ec01 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Fri, 29 Jun 2018 16:50:03 -0600 Subject: nvme: add disk name to trace events This will print the disk name to the nvme event trace for io requests so a user can better distinguish traffic to different disks. This can be used to create disk based filters. For example, to see only nvme0n2 traffic: echo "disk == \"nvme0n2\"" > /sys/kernel/debug/tracing/events/nvme/filter Signed-off-by: Keith Busch Reviewed-by: Sagi Grimberg Reviewed-by: Johannes Thumshirn [hch: turned __assign_disk_name into an inline function] Signed-off-by: Christoph Hellwig --- drivers/nvme/host/trace.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/nvme/host/trace.c') diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c index 41944bbef835..25b0e310f4a8 100644 --- a/drivers/nvme/host/trace.c +++ b/drivers/nvme/host/trace.c @@ -128,3 +128,14 @@ const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p, return nvme_trace_common(p, cdw10); } } + +const char *nvme_trace_disk_name(struct trace_seq *p, char *name) +{ + const char *ret = trace_seq_buffer_ptr(p); + + if (*name) + trace_seq_printf(p, "disk=%s, ", name); + trace_seq_putc(p, 0); + + return ret; +} -- cgit v1.2.3