[PATCH v2 0/4] Pre-requisites for client-side RPC-with-TLS support

[PATCH v2 0/4] Pre-requisites for client-side RPC-with-TLS support

[Chuck Lever]

As Jeff recently suggested, here are a few generic patches from my
RPC-with-TLS series that I believe can go in now.

Changes since v1:
- Record presentation addresses in trace_xs_data_ready()
- Drop trace_nfs_mount_addr_err()

---

Chuck Lever (4):
      SUNRPC: Fail faster on bad verifier
      SUNRPC: Widen rpc_task::tk_flags
      SUNRPC: Replace dprintk() call site in xs_data_ready
      NFS: Replace fs_context-related dprintk() call sites with tracepoints


 fs/nfs/fs_context.c           | 24 ++++++++------
 fs/nfs/nfstrace.h             | 59 +++++++++++++++++++++++++++++++++++
 include/linux/sunrpc/clnt.h   |  6 ++--
 include/linux/sunrpc/sched.h  | 32 +++++++++----------
 include/trace/events/sunrpc.h | 20 ++++++++++++
 net/sunrpc/clnt.c             | 13 ++++----
 net/sunrpc/debugfs.c          |  2 +-
 net/sunrpc/xprtsock.c         |  6 ++--
 8 files changed, 125 insertions(+), 37 deletions(-)

--
Chuck Lever

[PATCH v2 1/4] SUNRPC: Fail faster on bad verifier

[Chuck Lever]

A bad verifier is not a garbage argument, it's an authentication
failure. Retrying it doesn't make the problem go away, and delays
upper layer recovery steps.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 net/sunrpc/clnt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index b6781ada3aa8..a97d4e06cae3 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2650,7 +2650,7 @@ rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr)
 
 out_verifier:
 	trace_rpc_bad_verifier(task);
-	goto out_garbage;
+	goto out_err;
 
 out_msg_denied:
 	error = -EACCES;

[PATCH v2 2/4] SUNRPC: Widen rpc_task::tk_flags

[Chuck Lever]

There is just one unused bit left in rpc_task::tk_flags, and I will
need two in subsequent patches. Double the width of the field to
accommodate more flag bits.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 include/linux/sunrpc/clnt.h  |    6 ++++--
 include/linux/sunrpc/sched.h |   32 ++++++++++++++++----------------
 net/sunrpc/clnt.c            |   11 ++++++-----
 net/sunrpc/debugfs.c         |    2 +-
 4 files changed, 27 insertions(+), 24 deletions(-)

diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 90501404fa49..cbdd20dc84b7 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -193,11 +193,13 @@ void rpc_prepare_reply_pages(struct rpc_rqst *req, struct page **pages,
 			     unsigned int hdrsize);
 void		rpc_call_start(struct rpc_task *);
 int		rpc_call_async(struct rpc_clnt *clnt,
-			       const struct rpc_message *msg, int flags,
+			       const struct rpc_message *msg,
+			       unsigned int flags,
 			       const struct rpc_call_ops *tk_ops,
 			       void *calldata);
 int		rpc_call_sync(struct rpc_clnt *clnt,
-			      const struct rpc_message *msg, int flags);
+			      const struct rpc_message *msg,
+			      unsigned int flags);
 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
 			       int flags);
 int		rpc_restart_call_prepare(struct rpc_task *);
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index 1d7a3e51b795..d4b7ebd0a99c 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -82,7 +82,7 @@ struct rpc_task {
 	ktime_t			tk_start;	/* RPC task init timestamp */
 
 	pid_t			tk_owner;	/* Process id for batching tasks */
-	unsigned short		tk_flags;	/* misc flags */
+	unsigned int		tk_flags;	/* misc flags */
 	unsigned short		tk_timeouts;	/* maj timeouts */
 
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS)
@@ -112,27 +112,27 @@ struct rpc_task_setup {
 	const struct rpc_call_ops *callback_ops;
 	void *callback_data;
 	struct workqueue_struct *workqueue;
-	unsigned short flags;
+	unsigned int flags;
 	signed char priority;
 };
 
 /*
  * RPC task flags
  */
-#define RPC_TASK_ASYNC		0x0001		/* is an async task */
-#define RPC_TASK_SWAPPER	0x0002		/* is swapping in/out */
-#define RPC_TASK_MOVEABLE	0x0004		/* nfs4.1+ rpc tasks */
-#define RPC_TASK_NULLCREDS	0x0010		/* Use AUTH_NULL credential */
-#define RPC_CALL_MAJORSEEN	0x0020		/* major timeout seen */
-#define RPC_TASK_DYNAMIC	0x0080		/* task was kmalloc'ed */
-#define	RPC_TASK_NO_ROUND_ROBIN	0x0100		/* send requests on "main" xprt */
-#define RPC_TASK_SOFT		0x0200		/* Use soft timeouts */
-#define RPC_TASK_SOFTCONN	0x0400		/* Fail if can't connect */
-#define RPC_TASK_SENT		0x0800		/* message was sent */
-#define RPC_TASK_TIMEOUT	0x1000		/* fail with ETIMEDOUT on timeout */
-#define RPC_TASK_NOCONNECT	0x2000		/* return ENOTCONN if not connected */
-#define RPC_TASK_NO_RETRANS_TIMEOUT	0x4000		/* wait forever for a reply */
-#define RPC_TASK_CRED_NOREF	0x8000		/* No refcount on the credential */
+#define RPC_TASK_ASYNC			0x00000001	/* is an async task */
+#define RPC_TASK_SWAPPER		0x00000002	/* is swapping in/out */
+#define RPC_TASK_MOVEABLE		0x00000004	/* nfs4.1+ rpc tasks */
+#define RPC_TASK_NULLCREDS		0x00000010	/* Use AUTH_NULL credential */
+#define RPC_CALL_MAJORSEEN		0x00000020	/* major timeout seen */
+#define RPC_TASK_DYNAMIC		0x00000080	/* task was kmalloc'ed */
+#define	RPC_TASK_NO_ROUND_ROBIN		0x00000100	/* send requests on "main" xprt */
+#define RPC_TASK_SOFT			0x00000200	/* Use soft timeouts */
+#define RPC_TASK_SOFTCONN		0x00000400	/* Fail if can't connect */
+#define RPC_TASK_SENT			0x00000800	/* message was sent */
+#define RPC_TASK_TIMEOUT		0x00001000	/* fail with ETIMEDOUT on timeout */
+#define RPC_TASK_NOCONNECT		0x00002000	/* return ENOTCONN if not connected */
+#define RPC_TASK_NO_RETRANS_TIMEOUT	0x00004000	/* wait forever for a reply */
+#define RPC_TASK_CRED_NOREF		0x00008000	/* No refcount on the credential */
 
 #define RPC_IS_ASYNC(t)		((t)->tk_flags & RPC_TASK_ASYNC)
 #define RPC_IS_SWAPPER(t)	((t)->tk_flags & RPC_TASK_SWAPPER)
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index a97d4e06cae3..476caa4ebf5c 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1162,7 +1162,8 @@ EXPORT_SYMBOL_GPL(rpc_run_task);
  * @msg: RPC call parameters
  * @flags: RPC call flags
  */
-int rpc_call_sync(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags)
+int rpc_call_sync(struct rpc_clnt *clnt, const struct rpc_message *msg,
+		  unsigned int flags)
 {
 	struct rpc_task	*task;
 	struct rpc_task_setup task_setup_data = {
@@ -1197,9 +1198,9 @@ EXPORT_SYMBOL_GPL(rpc_call_sync);
  * @tk_ops: RPC call ops
  * @data: user call data
  */
-int
-rpc_call_async(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags,
-	       const struct rpc_call_ops *tk_ops, void *data)
+int rpc_call_async(struct rpc_clnt *clnt, const struct rpc_message *msg,
+		   unsigned int flags, const struct rpc_call_ops *tk_ops,
+		   void *data)
 {
 	struct rpc_task	*task;
 	struct rpc_task_setup task_setup_data = {
@@ -3080,7 +3081,7 @@ static void rpc_show_task(const struct rpc_clnt *clnt,
 	if (RPC_IS_QUEUED(task))
 		rpc_waitq = rpc_qname(task->tk_waitqueue);
 
-	printk(KERN_INFO "%5u %04x %6d %8p %8p %8ld %8p %sv%u %s a:%ps q:%s\n",
+	printk(KERN_INFO "%5u %08x %6d %8p %8p %8ld %8p %sv%u %s a:%ps q:%s\n",
 		task->tk_pid, task->tk_flags, task->tk_status,
 		clnt, task->tk_rqstp, rpc_task_timeout(task), task->tk_ops,
 		clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task),
diff --git a/net/sunrpc/debugfs.c b/net/sunrpc/debugfs.c
index 8df634e63f30..60f20be4e7e5 100644
--- a/net/sunrpc/debugfs.c
+++ b/net/sunrpc/debugfs.c
@@ -30,7 +30,7 @@ tasks_show(struct seq_file *f, void *v)
 	if (task->tk_rqstp)
 		xid = be32_to_cpu(task->tk_rqstp->rq_xid);
 
-	seq_printf(f, "%5u %04x %6d 0x%x 0x%x %8ld %ps %sv%u %s a:%ps q:%s\n",
+	seq_printf(f, "%5u %08x %6d 0x%x 0x%x %8ld %ps %sv%u %s a:%ps q:%s\n",
 		task->tk_pid, task->tk_flags, task->tk_status,
 		clnt->cl_clid, xid, rpc_task_timeout(task), task->tk_ops,
 		clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task),

[PATCH v2 3/4] SUNRPC: Replace dprintk() call site in xs_data_ready

[Chuck Lever]

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 include/trace/events/sunrpc.h |   20 ++++++++++++++++++++
 net/sunrpc/xprtsock.c         |    6 ++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index b61d9c90fa26..21068ad61db8 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -1266,6 +1266,26 @@ TRACE_EVENT(xprt_reserve,
 	)
 );
 
+TRACE_EVENT(xs_data_ready,
+	TP_PROTO(
+		const struct rpc_xprt *xprt
+	),
+
+	TP_ARGS(xprt),
+
+	TP_STRUCT__entry(
+		__string(addr, xprt->address_strings[RPC_DISPLAY_ADDR])
+		__string(port, xprt->address_strings[RPC_DISPLAY_PORT])
+	),
+
+	TP_fast_assign(
+		__assign_str(addr, xprt->address_strings[RPC_DISPLAY_ADDR]);
+		__assign_str(port, xprt->address_strings[RPC_DISPLAY_PORT]);
+	),
+
+	TP_printk("peer=[%s]:%s", __get_str(addr), __get_str(port))
+);
+
 TRACE_EVENT(xs_stream_read_data,
 	TP_PROTO(struct rpc_xprt *xprt, ssize_t err, size_t total),
 
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index fcdd0fca408e..eba1be9984f8 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1378,7 +1378,7 @@ static void xs_udp_data_receive_workfn(struct work_struct *work)
 }
 
 /**
- * xs_data_ready - "data ready" callback for UDP sockets
+ * xs_data_ready - "data ready" callback for sockets
  * @sk: socket with data to read
  *
  */
@@ -1386,11 +1386,13 @@ static void xs_data_ready(struct sock *sk)
 {
 	struct rpc_xprt *xprt;
 
-	dprintk("RPC:       xs_data_ready...\n");
 	xprt = xprt_from_sock(sk);
 	if (xprt != NULL) {
 		struct sock_xprt *transport = container_of(xprt,
 				struct sock_xprt, xprt);
+
+		trace_xs_data_ready(xprt);
+
 		transport->old_data_ready(sk);
 		/* Any data means we had a useful conversation, so
 		 * then we don't need to delay the next reconnect

[PATCH v2 4/4] NFS: Replace fs_context-related dprintk() call sites with tracepoints

[Chuck Lever]

Contributed as part of the long patch series that converts NFS from
using dprintk to tracepoints for observability.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfs/fs_context.c |   24 ++++++++++++---------
 fs/nfs/nfstrace.h   |   59 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+), 10 deletions(-)

diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c
index 9a16897e8dc6..6eb3a43920f3 100644
--- a/fs/nfs/fs_context.c
+++ b/fs/nfs/fs_context.c
@@ -21,6 +21,8 @@
 #include "nfs.h"
 #include "internal.h"
 
+#include "nfstrace.h"
+
 #define NFSDBG_FACILITY		NFSDBG_MOUNT
 
 #if IS_ENABLED(CONFIG_NFS_V3)
@@ -284,7 +286,6 @@ static int nfs_verify_server_address(struct sockaddr *addr)
 	}
 	}
 
-	dfprintk(MOUNT, "NFS: Invalid IP address specified\n");
 	return 0;
 }
 
@@ -378,7 +379,7 @@ static int nfs_parse_security_flavors(struct fs_context *fc,
 	char *string = param->string, *p;
 	int ret;
 
-	dfprintk(MOUNT, "NFS: parsing %s=%s option\n", param->key, param->string);
+	trace_nfs_mount_assign(param->key, string);
 
 	while ((p = strsep(&string, ":")) != NULL) {
 		if (!*p)
@@ -480,7 +481,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 	unsigned int len;
 	int ret, opt;
 
-	dfprintk(MOUNT, "NFS:   parsing nfs mount option '%s'\n", param->key);
+	trace_nfs_mount_option(param);
 
 	opt = fs_parse(fc, nfs_fs_parameters, param, &result);
 	if (opt < 0)
@@ -683,6 +684,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 			return ret;
 		break;
 	case Opt_vers:
+		trace_nfs_mount_assign(param->key, param->string);
 		ret = nfs_parse_version_string(fc, param->string);
 		if (ret < 0)
 			return ret;
@@ -694,6 +696,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		break;
 
 	case Opt_proto:
+		trace_nfs_mount_assign(param->key, param->string);
 		protofamily = AF_INET;
 		switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) {
 		case Opt_xprt_udp6:
@@ -729,6 +732,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		break;
 
 	case Opt_mountproto:
+		trace_nfs_mount_assign(param->key, param->string);
 		mountfamily = AF_INET;
 		switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) {
 		case Opt_xprt_udp6:
@@ -751,6 +755,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		break;
 
 	case Opt_addr:
+		trace_nfs_mount_assign(param->key, param->string);
 		len = rpc_pton(fc->net_ns, param->string, param->size,
 			       &ctx->nfs_server.address,
 			       sizeof(ctx->nfs_server._address));
@@ -759,16 +764,19 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		ctx->nfs_server.addrlen = len;
 		break;
 	case Opt_clientaddr:
+		trace_nfs_mount_assign(param->key, param->string);
 		kfree(ctx->client_address);
 		ctx->client_address = param->string;
 		param->string = NULL;
 		break;
 	case Opt_mounthost:
+		trace_nfs_mount_assign(param->key, param->string);
 		kfree(ctx->mount_server.hostname);
 		ctx->mount_server.hostname = param->string;
 		param->string = NULL;
 		break;
 	case Opt_mountaddr:
+		trace_nfs_mount_assign(param->key, param->string);
 		len = rpc_pton(fc->net_ns, param->string, param->size,
 			       &ctx->mount_server.address,
 			       sizeof(ctx->mount_server._address));
@@ -846,7 +854,6 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		 */
 	case Opt_sloppy:
 		ctx->sloppy = true;
-		dfprintk(MOUNT, "NFS:   relaxing parsing rules\n");
 		break;
 	}
 
@@ -879,10 +886,8 @@ static int nfs_parse_source(struct fs_context *fc,
 	size_t len;
 	const char *end;
 
-	if (unlikely(!dev_name || !*dev_name)) {
-		dfprintk(MOUNT, "NFS: device name not specified\n");
+	if (unlikely(!dev_name || !*dev_name))
 		return -EINVAL;
-	}
 
 	/* Is the host name protected with square brakcets? */
 	if (*dev_name == '[') {
@@ -922,7 +927,7 @@ static int nfs_parse_source(struct fs_context *fc,
 	if (!ctx->nfs_server.export_path)
 		goto out_nomem;
 
-	dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", ctx->nfs_server.export_path);
+	trace_nfs_mount_path(ctx->nfs_server.export_path);
 	return 0;
 
 out_bad_devname:
@@ -1116,7 +1121,6 @@ static int nfs23_parse_monolithic(struct fs_context *fc,
 	return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS");
 
 out_nomem:
-	dfprintk(MOUNT, "NFS: not enough memory to handle mount options");
 	return -ENOMEM;
 
 out_no_address:
@@ -1248,7 +1252,7 @@ static int nfs4_parse_monolithic(struct fs_context *fc,
 	if (IS_ERR(c))
 		return PTR_ERR(c);
 	ctx->nfs_server.export_path = c;
-	dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c);
+	trace_nfs_mount_path(c);
 
 	c = strndup_user(data->client_addr.data, 16);
 	if (IS_ERR(c))
diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
index 012bd7339862..bd10b556d0d8 100644
--- a/fs/nfs/nfstrace.h
+++ b/fs/nfs/nfstrace.h
@@ -1609,6 +1609,65 @@ TRACE_EVENT(nfs_fh_to_dentry,
 		)
 );
 
+TRACE_EVENT(nfs_mount_assign,
+	TP_PROTO(
+		const char *option,
+		const char *value
+	),
+
+	TP_ARGS(option, value),
+
+	TP_STRUCT__entry(
+		__string(option, option)
+		__string(value, value)
+	),
+
+	TP_fast_assign(
+		__assign_str(option, option);
+		__assign_str(value, value);
+	),
+
+	TP_printk("option %s=%s",
+		__get_str(option), __get_str(value)
+	)
+);
+
+TRACE_EVENT(nfs_mount_option,
+	TP_PROTO(
+		const struct fs_parameter *param
+	),
+
+	TP_ARGS(param),
+
+	TP_STRUCT__entry(
+		__string(option, param->key)
+	),
+
+	TP_fast_assign(
+		__assign_str(option, param->key);
+	),
+
+	TP_printk("option %s", __get_str(option))
+);
+
+TRACE_EVENT(nfs_mount_path,
+	TP_PROTO(
+		const char *path
+	),
+
+	TP_ARGS(path),
+
+	TP_STRUCT__entry(
+		__string(path, path)
+	),
+
+	TP_fast_assign(
+		__assign_str(path, path);
+	),
+
+	TP_printk("path='%s'", __get_str(path))
+);
+
 DECLARE_EVENT_CLASS(nfs_xdr_event,
 		TP_PROTO(
 			const struct xdr_stream *xdr,

Re: [PATCH v2 3/4] SUNRPC: Replace dprintk() call site in xs_data_ready

[Jeff Layton]

On Fri, 2022-07-22 at 15:08 -0400, Chuck Lever wrote:
> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
> ---
>  include/trace/events/sunrpc.h |   20 ++++++++++++++++++++
>  net/sunrpc/xprtsock.c         |    6 ++++--
>  2 files changed, 24 insertions(+), 2 deletions(-)
> 
> diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
> index b61d9c90fa26..21068ad61db8 100644
> --- a/include/trace/events/sunrpc.h
> +++ b/include/trace/events/sunrpc.h
> @@ -1266,6 +1266,26 @@ TRACE_EVENT(xprt_reserve,
>  	)
>  );
>  
> +TRACE_EVENT(xs_data_ready,
> +	TP_PROTO(
> +		const struct rpc_xprt *xprt
> +	),
> +
> +	TP_ARGS(xprt),
> +
> +	TP_STRUCT__entry(
> +		__string(addr, xprt->address_strings[RPC_DISPLAY_ADDR])
> +		__string(port, xprt->address_strings[RPC_DISPLAY_PORT])
> +	),
> +
> +	TP_fast_assign(
> +		__assign_str(addr, xprt->address_strings[RPC_DISPLAY_ADDR]);
> +		__assign_str(port, xprt->address_strings[RPC_DISPLAY_PORT]);
> +	),
> +
> +	TP_printk("peer=[%s]:%s", __get_str(addr), __get_str(port))
> +);
> +
>  TRACE_EVENT(xs_stream_read_data,
>  	TP_PROTO(struct rpc_xprt *xprt, ssize_t err, size_t total),
>  
> diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
> index fcdd0fca408e..eba1be9984f8 100644
> --- a/net/sunrpc/xprtsock.c
> +++ b/net/sunrpc/xprtsock.c
> @@ -1378,7 +1378,7 @@ static void xs_udp_data_receive_workfn(struct work_struct *work)
>  }
>  
>  /**
> - * xs_data_ready - "data ready" callback for UDP sockets
> + * xs_data_ready - "data ready" callback for sockets
>   * @sk: socket with data to read
>   *
>   */
> @@ -1386,11 +1386,13 @@ static void xs_data_ready(struct sock *sk)
>  {
>  	struct rpc_xprt *xprt;
>  
> -	dprintk("RPC:       xs_data_ready...\n");
>  	xprt = xprt_from_sock(sk);
>  	if (xprt != NULL) {
>  		struct sock_xprt *transport = container_of(xprt,
>  				struct sock_xprt, xprt);
> +
> +		trace_xs_data_ready(xprt);
> +
>  		transport->old_data_ready(sk);
>  		/* Any data means we had a useful conversation, so
>  		 * then we don't need to delay the next reconnect
> 
> 

Reviewed-by: Jeff Layton <jlayton@kernel.org>