diff mbox series

[v6,8/9] tty: n_gsm: add DLCI specific rx/tx statistics

Message ID 20230817093231.2317-8-daniel.starke@siemens.com
State New
Headers show
Series [v6,1/9] tty: n_gsm: add restart flag to DLC specific ioctl config | expand

Commit Message

D. Starke Aug. 17, 2023, 9:32 a.m. UTC 
From: Daniel Starke <daniel.starke@siemens.com>

Add counters for the number of data bytes received/transmitted per DLCI in
for preparation for an upcoming patch which will expose these values to the
user.

Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
---
 drivers/tty/n_gsm.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

v5 -> v6:
No changes.

Link: https://lore.kernel.org/all/20230517155704.5701-8-daniel.starke@siemens.com/

Comments

Greg KH Aug. 22, 2023, 1:04 p.m. UTC | #1 
On Thu, Aug 17, 2023 at 11:32:30AM +0200, D. Starke wrote:
> From: Daniel Starke <daniel.starke@siemens.com>
> 
> Add counters for the number of data bytes received/transmitted per DLCI in
> for preparation for an upcoming patch which will expose these values to the
> user.

As you don't do anything with this data here, let's just wait until you
actually do as it's not part of this patch series.

So when your resend, please drop this.

thanks,

greg k-h
diff mbox series

Patch

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index fbef7977f775..47905803f8f9 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -186,6 +186,10 @@  struct gsm_dlci {
 	void (*data)(struct gsm_dlci *dlci, const u8 *data, int len);
 	void (*prev_data)(struct gsm_dlci *dlci, const u8 *data, int len);
 	struct net_device *net; /* network interface, if created */
+
+	/* Statistics (not currently exposed) */
+	u64 tx;			/* Data bytes sent on this DLCI */
+	u64 rx;			/* Data bytes received on this DLCI */
 };
 
 /*
@@ -1216,6 +1220,7 @@  static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci)
 	tty_port_tty_wakeup(&dlci->port);
 
 	__gsm_data_queue(dlci, msg);
+	dlci->tx += len;
 	/* Bytes of data we used up */
 	return size;
 }
@@ -1283,6 +1288,7 @@  static int gsm_dlci_data_output_framed(struct gsm_mux *gsm,
 	memcpy(dp, dlci->skb->data, len);
 	skb_pull(dlci->skb, len);
 	__gsm_data_queue(dlci, msg);
+	dlci->tx += len;
 	if (last) {
 		dev_kfree_skb_any(dlci->skb);
 		dlci->skb = NULL;
@@ -1461,6 +1467,7 @@  static int gsm_control_command(struct gsm_mux *gsm, int cmd, const u8 *data,
 	msg->data[1] = (dlen << 1) | EA;
 	memcpy(msg->data + 2, data, dlen);
 	gsm_data_queue(dlci, msg);
+	dlci->tx += dlen;
 
 	return 0;
 }
@@ -1488,6 +1495,7 @@  static void gsm_control_reply(struct gsm_mux *gsm, int cmd, const u8 *data,
 	msg->data[1] = (dlen << 1) | EA;
 	memcpy(msg->data + 2, data, dlen);
 	gsm_data_queue(dlci, msg);
+	dlci->tx += dlen;
 }
 
 /**
@@ -1852,10 +1860,13 @@  static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
 						const u8 *data, int clen)
 {
 	u8 buf[1];
+	struct gsm_dlci *dlci = gsm->dlci[0];
+
+	if (dlci)
+		dlci->rx += clen;
 
 	switch (command) {
 	case CMD_CLD: {
-		struct gsm_dlci *dlci = gsm->dlci[0];
 		/* Modem wishes to close down */
 		if (dlci) {
 			dlci->dead = true;
@@ -1934,6 +1945,8 @@  static void gsm_control_response(struct gsm_mux *gsm, unsigned int command,
 
 	ctrl = gsm->pending_cmd;
 	dlci = gsm->dlci[0];
+	if (dlci)
+		dlci->rx += clen;
 	command |= 1;
 	/* Does the reply match our command */
 	if (ctrl != NULL && (command == ctrl->cmd || command == CMD_NSC)) {
@@ -2298,6 +2311,9 @@  static void gsm_dlci_begin_open(struct gsm_dlci *dlci)
 			need_pn = true;
 	}
 
+	dlci->tx = 0;
+	dlci->rx = 0;
+
 	switch (dlci->state) {
 	case DLCI_CLOSED:
 	case DLCI_WAITING_CONFIG:
@@ -2330,6 +2346,9 @@  static void gsm_dlci_begin_open(struct gsm_dlci *dlci)
  */
 static void gsm_dlci_set_opening(struct gsm_dlci *dlci)
 {
+	dlci->tx = 0;
+	dlci->rx = 0;
+
 	switch (dlci->state) {
 	case DLCI_CLOSED:
 	case DLCI_WAITING_CONFIG:
@@ -2349,6 +2368,9 @@  static void gsm_dlci_set_opening(struct gsm_dlci *dlci)
  */
 static void gsm_dlci_set_wait_config(struct gsm_dlci *dlci)
 {
+	dlci->tx = 0;
+	dlci->rx = 0;
+
 	switch (dlci->state) {
 	case DLCI_CLOSED:
 	case DLCI_CLOSING:
@@ -2425,6 +2447,7 @@  static void gsm_dlci_data(struct gsm_dlci *dlci, const u8 *data, int clen)
 		fallthrough;
 	case 1:		/* Line state will go via DLCI 0 controls only */
 	default:
+		dlci->rx += clen;
 		tty_insert_flip_string(port, data, clen);
 		tty_flip_buffer_push(port);
 	}
@@ -2785,6 +2808,7 @@  static void gsm_queue(struct gsm_mux *gsm)
 			gsm->open_error++;
 			return;
 		}
+		dlci->rx += gsm->len;
 		if (dlci->dead)
 			gsm_response(gsm, address, DM|PF);
 		else {