linux-kernel - [PATCH net-next 3/7] netconsole: add taskname to extradata entry count

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Message-Id: <20250221-netcons_current-v1-3-21c86ae8fc0d@debian.org>
Date: Fri, 21 Feb 2025 05:52:08 -0800
From: Breno Leitao <leitao@...ian.org>
To: Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, Jonathan Corbet <corbet@....net>, 
 Shuah Khan <shuah@...nel.org>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Breno Leitao <leitao@...ian.org>, kernel-team@...a.com
Subject: [PATCH net-next 3/7] netconsole: add taskname to extradata entry
 count

New SYSDATA_TASKNAME feature flag to track when taskname append is enabled.

Additional check in count_extradata_entries() to include taskname in
total, counting it as an entry in extradata. This function is used to
check if we are not overflowing the number of extradata items.

Signed-off-by: Breno Leitao <leitao@...ian.org>
---
 drivers/net/netconsole.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 26ff2ed4de16bce58e9eeaf8b5b362dfaafaca0a..1b109f46512ffb7628c6b34c6efdfc301376dd53 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -104,6 +104,8 @@ struct netconsole_target_stats  {
 enum sysdata_feature {
 	/* Populate the CPU that sends the message */
 	SYSDATA_CPU_NR = BIT(0),
+	/* Populate the task name (as in current->comm) in sysdata */
+	SYSDATA_TASKNAME = BIT(1),
 };

 /**
@@ -701,6 +703,8 @@ static size_t count_extradata_entries(struct netconsole_target *nt)
 	/* Plus sysdata entries */
 	if (nt->sysdata_fields & SYSDATA_CPU_NR)
 		entries += 1;
+	if (nt->sysdata_fields & SYSDATA_TASKNAME)
+		entries += 1;

 	return entries;
 }

-- 
2.43.5