linux-kernel - [PATCH 2/5] netfs, cifs: Improve some debugging bits

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Message-ID: <20240823161209.434705-3-dhowells@redhat.com>
Date: Fri, 23 Aug 2024 17:12:03 +0100
From: David Howells <dhowells@...hat.com>
To: Christian Brauner <christian@...uner.io>
Cc: David Howells <dhowells@...hat.com>,
	Pankaj Raghav <p.raghav@...sung.com>,
	Jeff Layton <jlayton@...nel.org>,
	Matthew Wilcox <willy@...radead.org>,
	netfs@...ts.linux.dev,
	linux-afs@...ts.infradead.org,
	linux-cifs@...r.kernel.org,
	linux-nfs@...r.kernel.org,
	ceph-devel@...r.kernel.org,
	v9fs@...ts.linux.dev,
	linux-erofs@...ts.ozlabs.org,
	linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Steve French <sfrench@...ba.org>,
	Paulo Alcantara <pc@...guebit.com>
Subject: [PATCH 2/5] netfs, cifs: Improve some debugging bits

Improve some debugging bits:

 (1) The netfslib _debug() macro doesn't need a newline in its format
     string.

 (2) Display the request debug ID and subrequest index in messages emitted
     in smb2_adjust_credits() to make it easier to reference in traces.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Steve French <sfrench@...ba.org>
cc: Paulo Alcantara <pc@...guebit.com>
cc: Jeff Layton <jlayton@...nel.org>
cc: linux-cifs@...r.kernel.org
cc: netfs@...ts.linux.dev
cc: linux-fsdevel@...r.kernel.org
---
 fs/netfs/io.c           | 2 +-
 fs/smb/client/smb2ops.c | 8 +++++---
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/fs/netfs/io.c b/fs/netfs/io.c
index d6510a9385dc..605b667fe3a6 100644
--- a/fs/netfs/io.c
+++ b/fs/netfs/io.c
@@ -270,7 +270,7 @@ static void netfs_reset_subreq_iter(struct netfs_io_request *rreq,
 	if (count == remaining)
 		return;
 
-	_debug("R=%08x[%u] ITER RESUB-MISMATCH %zx != %zx-%zx-%llx %x\n",
+	_debug("R=%08x[%u] ITER RESUB-MISMATCH %zx != %zx-%zx-%llx %x",
 	       rreq->debug_id, subreq->debug_index,
 	       iov_iter_count(&subreq->io_iter), subreq->transferred,
 	       subreq->len, rreq->i_size,
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index 763a17e62750..20e674990760 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -316,7 +316,8 @@ smb2_adjust_credits(struct TCP_Server_Info *server,
 				      cifs_trace_rw_credits_no_adjust_up);
 		trace_smb3_too_many_credits(server->CurrentMid,
 				server->conn_id, server->hostname, 0, credits->value - new_val, 0);
-		cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
+		cifs_server_dbg(VFS, "R=%x[%x] request has less credits (%d) than required (%d)",
+				subreq->rreq->debug_id, subreq->subreq.debug_index,
 				credits->value, new_val);
 
 		return -EOPNOTSUPP;
@@ -338,8 +339,9 @@ smb2_adjust_credits(struct TCP_Server_Info *server,
 		trace_smb3_reconnect_detected(server->CurrentMid,
 			server->conn_id, server->hostname, scredits,
 			credits->value - new_val, in_flight);
-		cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
-			 credits->value - new_val);
+		cifs_server_dbg(VFS, "R=%x[%x] trying to return %d credits to old session\n",
+				subreq->rreq->debug_id, subreq->subreq.debug_index,
+				credits->value - new_val);
 		return -EAGAIN;
 	}