On Tue, Dec 12, 2006 at 03:34:54PM +0900, Keiichi KII wrote:
> From: Keiichi KII <[email protected]>
>
> This patch contains the following changes.
>
> create a sysfs entry for netconsole in /sys/class/misc.
> This entry has elements related to netconsole as follows.
> You can change configuration of netconsole(writable attributes such as IP
> address, port number and so on) and check current configuration of netconsole.
>
> -+- /sys/class/misc/
> |-+- netconsole/
> |-+- port1/
> | |--- id [r--r--r--] unique port id
> | |--- remove [-w-------] if you write something to "remove",
> | | this port is removed.
> | |--- dev_name [r--r--r--] network interface name
> | |--- local_ip [rw-r--r--] source IP to use, writable
> | |--- local_port [rw-r--r--] source port number for UDP packets, writable
> | |--- local_mac [r--r--r--] source MAC address
> | |--- remote_ip [rw-r--r--] port number for logging agent, writable
> | |--- remote_port [rw-r--r--] IP address for logging agent, writable
> | ---- remote_mac [rw-r--r--] MAC address for logging agent, writable
> |--- port2/
> |--- port3/
> ...
>
> Signed-off-by: Keiichi KII <[email protected]>
> ---
> --- linux-2.6.19/drivers/net/netconsole.c 2006-12-06 14:37:26.842825500 +0900
> +++ enhanced-netconsole/drivers/net/netconsole.c.sysfs 2006-12-06
> 13:32:47.488381000 +0900
> @@ -45,6 +45,8 @@
> #include <linux/sysrq.h>
> #include <linux/smp.h>
> #include <linux/netpoll.h>
> +#include <linux/miscdevice.h>
> +#include <linux/inet.h>
>
> MODULE_AUTHOR("Maintainer: Matt Mackall <[email protected]>");
> MODULE_DESCRIPTION("Console driver for network interfaces");
> @@ -53,6 +55,7 @@ MODULE_LICENSE("GPL");
> enum {
> MAX_PRINT_CHUNK = 1000,
> MAX_CONFIG_LENGTH = 256,
> + MAC_ADDR_DIGIT = 6,
> };
>
> static char config[MAX_CONFIG_LENGTH];
> @@ -62,19 +65,214 @@ MODULE_PARM_DESC(netconsole, " netconsol
>
> struct netconsole_device {
> struct list_head list;
> + struct kobject obj;
> spinlock_t netpoll_lock;
> int id;
> struct netpoll np;
> };
>
> +struct netcon_dev_attr {
> + struct attribute attr;
> + ssize_t (*show)(struct netconsole_device*, char*);
> + ssize_t (*store)(struct netconsole_device*, const char*,
> + size_t count);
> +};
> +
> static int add_netcon_dev(const char*);
> +static void setup_netcon_dev_sysfs(struct netconsole_device*);
> static void cleanup_netconsole(void);
> static void netcon_dev_cleanup(struct netconsole_device *nd);
>
> +static int netcon_miscdev_configured = 0;
> +
> static LIST_HEAD(active_netconsole_dev);
>
> static DEFINE_SPINLOCK(netconsole_dev_list_lock);
>
> +#define SHOW_CLASS_ATTR(field, type, format, ...) \
> +static ssize_t show_##field(type, char *buf) \
> +{ \
> + return sprintf(buf, format, __VA_ARGS__); \
> +} \
I see this sort of thing is pretty common with sysfs stuff.. but yuck.
> +static ssize_t show_netcon_dev_attr(struct kobject *kobj,
> + struct attribute *attr,
> + char *buffer)
> +{
> + struct netcon_dev_attr *na = container_of(attr, struct netcon_dev_attr,
> + attr);
> + struct netconsole_device * nd =
> + container_of(kobj, struct netconsole_device, obj);
> + if (na->show) {
> + return na->show(nd, buffer);
> + } else {
> + return -EACCES;
> + }
Kernel style is to skip the braces for single statement clauses.
> + if (misc_register(&netcon_miscdev)) {
> + printk(KERN_INFO
> + "netconsole: unable netconsole misc device\n");
This error message seems to be missing a word or two.
--
Mathematics is the supreme nostalgia of our time.
-
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