fscache: add tracepoint when failing cookie

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>

diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index 26a6d39..451d8a0 100644 (file)
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -263,6 +263,8 @@ void fscache_caching_failed(struct fscache_cookie *cookie)
 {
        clear_bit(FSCACHE_COOKIE_IS_CACHING, &cookie->flags);
        fscache_set_cookie_state(cookie, FSCACHE_COOKIE_STATE_FAILED);
+       trace_fscache_cookie(cookie->debug_id, refcount_read(&cookie->ref),
+                               fscache_cookie_failed);
 }
 EXPORT_SYMBOL(fscache_caching_failed);
 

diff --git a/include/trace/events/fscache.h b/include/trace/events/fscache.h
index cb3fb33..c078c48 100644 (file)
--- a/include/trace/events/fscache.h
+++ b/include/trace/events/fscache.h
@@ -49,6 +49,7 @@ enum fscache_volume_trace {
 enum fscache_cookie_trace {
        fscache_cookie_collision,
        fscache_cookie_discard,
+       fscache_cookie_failed,
        fscache_cookie_get_attach_object,
        fscache_cookie_get_end_access,
        fscache_cookie_get_hash_collision,
@@ -131,6 +132,7 @@ enum fscache_access_trace {
 #define fscache_cookie_traces                                          \
        EM(fscache_cookie_collision,            "*COLLIDE*")            \
        EM(fscache_cookie_discard,              "DISCARD  ")            \
+       EM(fscache_cookie_failed,               "FAILED   ")            \
        EM(fscache_cookie_get_attach_object,    "GET attch")            \
        EM(fscache_cookie_get_hash_collision,   "GET hcoll")            \
        EM(fscache_cookie_get_end_access,       "GQ  endac")            \