*
****************************************************************/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/module.h>
const char *buf,
size_t count)
{
+ unsigned long flags;
int enabled;
int err;
if (enabled < 0 || enabled > 1)
return -EINVAL;
if (enabled == nt->enabled) {
- printk(KERN_INFO "netconsole: network logging has already %s\n",
- nt->enabled ? "started" : "stopped");
+ pr_info("network logging has already %s\n",
+ nt->enabled ? "started" : "stopped");
return -EINVAL;
}
- mutex_lock(&nt->mutex);
if (enabled) { /* 1 */
-
/*
* Skip netpoll_parse_options() -- all the attributes are
* already configured via configfs. Just print them out.
netpoll_print_options(&nt->np);
err = netpoll_setup(&nt->np);
- if (err) {
- mutex_unlock(&nt->mutex);
+ if (err)
return err;
- }
-
- printk(KERN_INFO "netconsole: network logging started\n");
+ pr_info("netconsole: network logging started\n");
} else { /* 0 */
+ /* We need to disable the netconsole before cleaning it up
+ * otherwise we might end up in write_msg() with
+ * nt->np.dev == NULL and nt->enabled == 1
+ */
+ spin_lock_irqsave(&target_list_lock, flags);
+ nt->enabled = 0;
+ spin_unlock_irqrestore(&target_list_lock, flags);
netpoll_cleanup(&nt->np);
}
nt->enabled = enabled;
- mutex_unlock(&nt->mutex);
return strnlen(buf, count);
}
size_t len;
if (nt->enabled) {
- printk(KERN_ERR "netconsole: target (%s) is enabled, "
- "disable to update parameters\n",
- config_item_name(&nt->item));
+ pr_err("target (%s) is enabled, disable to update parameters\n",
+ config_item_name(&nt->item));
return -EINVAL;
}
int rv;
if (nt->enabled) {
- printk(KERN_ERR "netconsole: target (%s) is enabled, "
- "disable to update parameters\n",
- config_item_name(&nt->item));
+ pr_err("target (%s) is enabled, disable to update parameters\n",
+ config_item_name(&nt->item));
return -EINVAL;
}
int rv;
if (nt->enabled) {
- printk(KERN_ERR "netconsole: target (%s) is enabled, "
- "disable to update parameters\n",
- config_item_name(&nt->item));
+ pr_err("target (%s) is enabled, disable to update parameters\n",
+ config_item_name(&nt->item));
return -EINVAL;
}
size_t count)
{
if (nt->enabled) {
- printk(KERN_ERR "netconsole: target (%s) is enabled, "
- "disable to update parameters\n",
- config_item_name(&nt->item));
+ pr_err("target (%s) is enabled, disable to update parameters\n",
+ config_item_name(&nt->item));
return -EINVAL;
}
const char *end;
if (in6_pton(buf, count, nt->np.local_ip.in6.s6_addr, -1, &end) > 0) {
if (*end && *end != '\n') {
- printk(KERN_ERR "netconsole: invalid IPv6 address at: <%c>\n", *end);
+ pr_err("invalid IPv6 address at: <%c>\n", *end);
return -EINVAL;
}
nt->np.ipv6 = true;
size_t count)
{
if (nt->enabled) {
- printk(KERN_ERR "netconsole: target (%s) is enabled, "
- "disable to update parameters\n",
- config_item_name(&nt->item));
+ pr_err("target (%s) is enabled, disable to update parameters\n",
+ config_item_name(&nt->item));
return -EINVAL;
}
const char *end;
if (in6_pton(buf, count, nt->np.remote_ip.in6.s6_addr, -1, &end) > 0) {
if (*end && *end != '\n') {
- printk(KERN_ERR "netconsole: invalid IPv6 address at: <%c>\n", *end);
+ pr_err("invalid IPv6 address at: <%c>\n", *end);
return -EINVAL;
}
nt->np.ipv6 = true;
u8 remote_mac[ETH_ALEN];
if (nt->enabled) {
- printk(KERN_ERR "netconsole: target (%s) is enabled, "
- "disable to update parameters\n",
- config_item_name(&nt->item));
+ pr_err("target (%s) is enabled, disable to update parameters\n",
+ config_item_name(&nt->item));
return -EINVAL;
}
struct netconsole_target_attr *na =
container_of(attr, struct netconsole_target_attr, attr);
+ mutex_lock(&nt->mutex);
if (na->store)
ret = na->store(nt, buf, count);
+ mutex_unlock(&nt->mutex);
return ret;
}
}
spin_unlock_irqrestore(&target_list_lock, flags);
if (stopped) {
- printk(KERN_INFO "netconsole: network logging stopped on "
- "interface %s as it ", dev->name);
+ const char *msg = "had an event";
switch (event) {
case NETDEV_UNREGISTER:
- printk(KERN_CONT "unregistered\n");
+ msg = "unregistered";
break;
case NETDEV_RELEASE:
- printk(KERN_CONT "released slaves\n");
+ msg = "released slaves";
break;
case NETDEV_JOIN:
- printk(KERN_CONT "is joining a master device\n");
+ msg = "is joining a master device";
break;
}
+ pr_info("network logging stopped on interface %s as it %s\n",
+ dev->name, msg);
}
done:
goto undonotifier;
register_console(&netconsole);
- printk(KERN_INFO "netconsole: network logging started\n");
+ pr_info("network logging started\n");
return err;
unregister_netdevice_notifier(&netconsole_netdev_notifier);
fail:
- printk(KERN_ERR "netconsole: cleaning up\n");
+ pr_err("cleaning up\n");
/*
* Remove all targets and destroy them (only targets created