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

From: Breno Leitao
Date: Fri Feb 21 2025 - 08:53:38 EST


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@xxxxxxxxxx>
---
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