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authorJeff Layton <jlayton@primarydata.com>2014-11-26 22:44:43 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-11-27 21:14:51 +0300
commitb4b9d2ccf0be61c69213f6ae4e33377c05194ef4 (patch)
tree54709e972d890b22b6de65124f87953534aaa9a3 /include/linux/sunrpc
parentea5264138d240825a7e3f11d5945d568b74efb91 (diff)
downloadlinux-b4b9d2ccf0be61c69213f6ae4e33377c05194ef4.tar.xz
sunrpc: add debugfs file for displaying client rpc_task queue
It's possible to get a dump of the RPC task queue by writing a value to /proc/sys/sunrpc/rpc_debug. If you write any value to that file, you get a dump of the RPC client task list into the log buffer. This is a rather inconvenient interface however, and makes it hard to get immediate info about the task queue. Add a new directory hierarchy under debugfs: sunrpc/ rpc_clnt/ <clientid>/ Within each clientid directory we create a new "tasks" file that will dump info similar to what shows up in the log buffer, but with a few small differences -- we avoid printing raw kernel addresses in favor of symbolic names and the XID is also displayed. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/sunrpc')
-rw-r--r--include/linux/sunrpc/clnt.h4
-rw-r--r--include/linux/sunrpc/debug.h31
2 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 70736b98c721..d86acc63b25f 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -63,6 +63,9 @@ struct rpc_clnt {
struct rpc_rtt cl_rtt_default;
struct rpc_timeout cl_timeout_default;
const struct rpc_program *cl_program;
+#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
+ struct dentry *cl_debugfs; /* debugfs directory */
+#endif
};
/*
@@ -176,5 +179,6 @@ size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
int rpc_localaddr(struct rpc_clnt *, struct sockaddr *, size_t);
+const char *rpc_proc_name(const struct rpc_task *task);
#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_CLNT_H */
diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h
index 43f38ee9668c..835339707094 100644
--- a/include/linux/sunrpc/debug.h
+++ b/include/linux/sunrpc/debug.h
@@ -53,9 +53,40 @@ extern unsigned int nlm_debug;
/*
* Sysctl interface for RPC debugging
*/
+
+struct rpc_clnt;
+
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
void rpc_register_sysctl(void);
void rpc_unregister_sysctl(void);
+int sunrpc_debugfs_init(void);
+void sunrpc_debugfs_exit(void);
+int rpc_clnt_debugfs_register(struct rpc_clnt *);
+void rpc_clnt_debugfs_unregister(struct rpc_clnt *);
+#else
+static inline int
+sunrpc_debugfs_init(void)
+{
+ return 0;
+}
+
+static inline void
+sunrpc_debugfs_exit(void)
+{
+ return;
+}
+
+static inline int
+rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
+{
+ return 0;
+}
+
+static inline void
+rpc_clnt_debugfs_unregister(struct rpc_clnt *clnt)
+{
+ return;
+}
#endif
#endif /* _LINUX_SUNRPC_DEBUG_H_ */