From 787b306cf3296bdce5c8559206b237c1ae107484 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 6 Jan 2016 14:38:40 +0100 Subject: [PATCH] Bluetooth: avoid rebuilding hci_sock all the time Instead, allow using string formatting with send_monitor_note() and access init_utsname(). Signed-off-by: Johannes Berg Signed-off-by: Marcel Holtmann --- net/bluetooth/hci_sock.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 41f579ba447b..1298d723c0e0 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -25,9 +25,8 @@ /* Bluetooth HCI sockets. */ #include +#include #include -#include -#include #include #include @@ -385,17 +384,26 @@ static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event) return skb; } -static void send_monitor_note(struct sock *sk, const char *text) +static void __printf(2, 3) +send_monitor_note(struct sock *sk, const char *fmt, ...) { - size_t len = strlen(text); + size_t len; struct hci_mon_hdr *hdr; struct sk_buff *skb; + va_list args; + + va_start(args, fmt); + len = vsnprintf(NULL, 0, fmt, args); + va_end(args); skb = bt_skb_alloc(len + 1, GFP_ATOMIC); if (!skb) return; - strcpy(skb_put(skb, len + 1), text); + va_start(args, fmt); + vsprintf(skb_put(skb, len), fmt, args); + *skb_put(skb, 1) = 0; + va_end(args); __net_timestamp(skb); @@ -897,10 +905,11 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, */ hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); - send_monitor_note(sk, "Linux version " UTS_RELEASE - " (" UTS_MACHINE ")"); - send_monitor_note(sk, "Bluetooth subsystem version " - BT_SUBSYS_VERSION); + send_monitor_note(sk, "Linux version %s (%s)", + init_utsname()->release, + init_utsname()->machine); + send_monitor_note(sk, "Bluetooth subsystem version %s", + BT_SUBSYS_VERSION); send_monitor_replay(sk); atomic_inc(&monitor_promisc); -- 2.39.5