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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 <johannes.berg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johannes Berg 2016-01-06 14:38:40 +01:00 committed by Marcel Holtmann
parent 78b781ca0d
commit 787b306cf3
1 changed files with 18 additions and 9 deletions
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27
net/bluetooth/hci_sock.c
View File

@ -25,9 +25,8 @@
/* Bluetooth HCI sockets. */
#include <linux/export.h>
#include <linux/utsname.h>
#include <asm/unaligned.h>
#include <generated/compile.h>
#include <generated/utsrelease.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@ -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);