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Message-ID: <20240126231348.281600-8-thepacketgeek@gmail.com>
Date: Fri, 26 Jan 2024 15:13:42 -0800
From: Matthew Wood <thepacketgeek@...il.com>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: leitao@...ian.org,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2 7/8] net: netconsole: append userdata to netconsole messages
Append userdata to outgoing unfragmented (<1000 bytes) netconsole messages.
When sending messages the userdata string is already formatted and stored
in netconsole_target->userdata_complete.
Always write the outgoing message to buf, so userdata can be appended in
a standard fashion. This is a change from only using buf when the
release needs to be prepended to the message.
Co-developed-by: Breno Leitao <leitao@...ian.org>
Signed-off-by: Breno Leitao <leitao@...ian.org>
Signed-off-by: Matthew Wood <thepacketgeek@...il.com>
---
drivers/net/netconsole.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 73feba0b3c93..de668a0794b1 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -1035,19 +1035,34 @@ static void send_ext_msg_udp(struct netconsole_target *nt, const char *msg,
const char *msg_ready = msg;
const char *release;
int release_len = 0;
+ int userdata_len = 0;
+ char *userdata = NULL;
+
+#ifdef CONFIG_NETCONSOLE_DYNAMIC
+ userdata = nt->userdata_complete;
+ userdata_len = nt->userdata_length;
+#endif
if (nt->release) {
release = init_utsname()->release;
release_len = strlen(release) + 1;
}
- if (msg_len + release_len <= MAX_PRINT_CHUNK) {
+ if (msg_len + release_len + userdata_len <= MAX_PRINT_CHUNK) {
/* No fragmentation needed */
if (nt->release) {
scnprintf(buf, MAX_PRINT_CHUNK, "%s,%s", release, msg);
msg_len += release_len;
- msg_ready = buf;
+ } else {
+ memcpy(buf, msg, msg_len);
}
+
+ if (userdata)
+ msg_len += scnprintf(&buf[msg_len],
+ MAX_PRINT_CHUNK - msg_len,
+ "%s", userdata);
+
+ msg_ready = buf;
netpoll_send_udp(&nt->np, msg_ready, msg_len);
return;
}
--
2.43.0
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