kyber: fix wrong strlcpy() size in trace_kyber_latency()

When copying to the latency type, we should be passing LATENCY_TYPE_LEN,
not DOMAIN_LEN (this isn't a problem in practice because we only pass
"total" or "I/O"). Fix it by changing all of the strlcpy() calls to use
sizeof().

Fixes: 6c3b7af1c975 ("kyber: add tracepoints")
Reported-by: Jordan Glover <Golden_Miller83@protonmail.ch>
Tested-by: Jordan Glover <Golden_Miller83@protonmail.ch>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/include/trace/events/kyber.h b/include/trace/events/kyber.h
index a9834c3..c0e7d24 100644 (file)
--- a/include/trace/events/kyber.h
+++ b/include/trace/events/kyber.h
@@ -31,8 +31,8 @@ TRACE_EVENT(kyber_latency,
 
        TP_fast_assign(
                __entry->dev            = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent)));
-               strlcpy(__entry->domain, domain, DOMAIN_LEN);
-               strlcpy(__entry->type, type, DOMAIN_LEN);
+               strlcpy(__entry->domain, domain, sizeof(__entry->domain));
+               strlcpy(__entry->type, type, sizeof(__entry->type));
                __entry->percentile     = percentile;
                __entry->numerator      = numerator;
                __entry->denominator    = denominator;
@@ -60,7 +60,7 @@ TRACE_EVENT(kyber_adjust,
 
        TP_fast_assign(
                __entry->dev            = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent)));
-               strlcpy(__entry->domain, domain, DOMAIN_LEN);
+               strlcpy(__entry->domain, domain, sizeof(__entry->domain));
                __entry->depth          = depth;
        ),
 
@@ -82,7 +82,7 @@ TRACE_EVENT(kyber_throttled,
 
        TP_fast_assign(
                __entry->dev            = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent)));
-               strlcpy(__entry->domain, domain, DOMAIN_LEN);
+               strlcpy(__entry->domain, domain, sizeof(__entry->domain));
        ),
 
        TP_printk("%d,%d %s", MAJOR(__entry->dev), MINOR(__entry->dev),