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-rw-r--r--drivers/net/netconsole.c775
1 files changed, 730 insertions, 45 deletions
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 69233f6aa05..5ffbb889164 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -35,95 +35,780 @@
****************************************************************/
#include <linux/mm.h>
-#include <linux/tty.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/console.h>
-#include <linux/tty_driver.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
-#include <linux/sysrq.h>
-#include <linux/smp.h>
#include <linux/netpoll.h>
+#include <linux/inet.h>
+#include <linux/configfs.h>
MODULE_AUTHOR("Maintainer: Matt Mackall <mpm@selenic.com>");
MODULE_DESCRIPTION("Console driver for network interfaces");
MODULE_LICENSE("GPL");
-static char config[256];
-module_param_string(netconsole, config, 256, 0);
+#define MAX_PARAM_LENGTH 256
+#define MAX_PRINT_CHUNK 1000
+
+static char config[MAX_PARAM_LENGTH];
+module_param_string(netconsole, config, MAX_PARAM_LENGTH, 0);
MODULE_PARM_DESC(netconsole, " netconsole=[src-port]@[src-ip]/[dev],[tgt-port]@<tgt-ip>/[tgt-macaddr]\n");
-static struct netpoll np = {
- .name = "netconsole",
- .dev_name = "eth0",
- .local_port = 6665,
- .remote_port = 6666,
- .remote_mac = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
+#ifndef MODULE
+static int __init option_setup(char *opt)
+{
+ strlcpy(config, opt, MAX_PARAM_LENGTH);
+ return 1;
+}
+__setup("netconsole=", option_setup);
+#endif /* MODULE */
+
+/* Linked list of all configured targets */
+static LIST_HEAD(target_list);
+
+/* This needs to be a spinlock because write_msg() cannot sleep */
+static DEFINE_SPINLOCK(target_list_lock);
+
+/**
+ * struct netconsole_target - Represents a configured netconsole target.
+ * @list: Links this target into the target_list.
+ * @item: Links us into the configfs subsystem hierarchy.
+ * @enabled: On / off knob to enable / disable target.
+ * Visible from userspace (read-write).
+ * We maintain a strict 1:1 correspondence between this and
+ * whether the corresponding netpoll is active or inactive.
+ * Also, other parameters of a target may be modified at
+ * runtime only when it is disabled (enabled == 0).
+ * @np: The netpoll structure for this target.
+ * Contains the other userspace visible parameters:
+ * dev_name (read-write)
+ * local_port (read-write)
+ * remote_port (read-write)
+ * local_ip (read-write)
+ * remote_ip (read-write)
+ * local_mac (read-only)
+ * remote_mac (read-write)
+ */
+struct netconsole_target {
+ struct list_head list;
+#ifdef CONFIG_NETCONSOLE_DYNAMIC
+ struct config_item item;
+#endif
+ int enabled;
+ struct netpoll np;
};
-static int configured = 0;
-#define MAX_PRINT_CHUNK 1000
+#ifdef CONFIG_NETCONSOLE_DYNAMIC
-static void write_msg(struct console *con, const char *msg, unsigned int len)
+static struct configfs_subsystem netconsole_subsys;
+
+static int __init dynamic_netconsole_init(void)
{
- int frag, left;
- unsigned long flags;
+ config_group_init(&netconsole_subsys.su_group);
+ mutex_init(&netconsole_subsys.su_mutex);
+ return configfs_register_subsystem(&netconsole_subsys);
+}
- if (!np.dev)
- return;
+static void __exit dynamic_netconsole_exit(void)
+{
+ configfs_unregister_subsystem(&netconsole_subsys);
+}
+
+/*
+ * Targets that were created by parsing the boot/module option string
+ * do not exist in the configfs hierarchy (and have NULL names) and will
+ * never go away, so make these a no-op for them.
+ */
+static void netconsole_target_get(struct netconsole_target *nt)
+{
+ if (config_item_name(&nt->item))
+ config_item_get(&nt->item);
+}
+
+static void netconsole_target_put(struct netconsole_target *nt)
+{
+ if (config_item_name(&nt->item))
+ config_item_put(&nt->item);
+}
+
+#else /* !CONFIG_NETCONSOLE_DYNAMIC */
+
+static int __init dynamic_netconsole_init(void)
+{
+ return 0;
+}
- local_irq_save(flags);
+static void __exit dynamic_netconsole_exit(void)
+{
+}
- for(left = len; left; ) {
- frag = min(left, MAX_PRINT_CHUNK);
- netpoll_send_udp(&np, msg, frag);
- msg += frag;
- left -= frag;
+/*
+ * No danger of targets going away from under us when dynamic
+ * reconfigurability is off.
+ */
+static void netconsole_target_get(struct netconsole_target *nt)
+{
+}
+
+static void netconsole_target_put(struct netconsole_target *nt)
+{
+}
+
+#endif /* CONFIG_NETCONSOLE_DYNAMIC */
+
+/* Allocate new target (from boot/module param) and setup netpoll for it */
+static struct netconsole_target *alloc_param_target(char *target_config)
+{
+ int err = -ENOMEM;
+ struct netconsole_target *nt;
+
+ /*
+ * Allocate and initialize with defaults.
+ * Note that these targets get their config_item fields zeroed-out.
+ */
+ nt = kzalloc(sizeof(*nt), GFP_KERNEL);
+ if (!nt) {
+ printk(KERN_ERR "netconsole: failed to allocate memory\n");
+ goto fail;
}
- local_irq_restore(flags);
+ nt->np.name = "netconsole";
+ strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ);
+ nt->np.local_port = 6665;
+ nt->np.remote_port = 6666;
+ memset(nt->np.remote_mac, 0xff, ETH_ALEN);
+
+ /* Parse parameters and setup netpoll */
+ err = netpoll_parse_options(&nt->np, target_config);
+ if (err)
+ goto fail;
+
+ err = netpoll_setup(&nt->np);
+ if (err)
+ goto fail;
+
+ nt->enabled = 1;
+
+ return nt;
+
+fail:
+ kfree(nt);
+ return ERR_PTR(err);
}
-static struct console netconsole = {
- .name = "netcon",
- .flags = CON_ENABLED | CON_PRINTBUFFER,
- .write = write_msg
+/* Cleanup netpoll for given target (from boot/module param) and free it */
+static void free_param_target(struct netconsole_target *nt)
+{
+ netpoll_cleanup(&nt->np);
+ kfree(nt);
+}
+
+#ifdef CONFIG_NETCONSOLE_DYNAMIC
+
+/*
+ * Our subsystem hierarchy is:
+ *
+ * /sys/kernel/config/netconsole/
+ * |
+ * <target>/
+ * | enabled
+ * | dev_name
+ * | local_port
+ * | remote_port
+ * | local_ip
+ * | remote_ip
+ * | local_mac
+ * | remote_mac
+ * |
+ * <target>/...
+ */
+
+struct netconsole_target_attr {
+ struct configfs_attribute attr;
+ ssize_t (*show)(struct netconsole_target *nt,
+ char *buf);
+ ssize_t (*store)(struct netconsole_target *nt,
+ const char *buf,
+ size_t count);
};
-static int option_setup(char *opt)
+static struct netconsole_target *to_target(struct config_item *item)
{
- configured = !netpoll_parse_options(&np, opt);
- return 1;
+ return item ?
+ container_of(item, struct netconsole_target, item) :
+ NULL;
}
-__setup("netconsole=", option_setup);
+/*
+ * Wrapper over simple_strtol (base 10) with sanity and range checking.
+ * We return (signed) long only because we may want to return errors.
+ * Do not use this to convert numbers that are allowed to be negative.
+ */
+static long strtol10_check_range(const char *cp, long min, long max)
+{
+ long ret;
+ char *p = (char *) cp;
+
+ WARN_ON(min < 0);
+ WARN_ON(max < min);
+
+ ret = simple_strtol(p, &p, 10);
+
+ if (*p && (*p != '\n')) {
+ printk(KERN_ERR "netconsole: invalid input\n");
+ return -EINVAL;
+ }
+ if ((ret < min) || (ret > max)) {
+ printk(KERN_ERR "netconsole: input %ld must be between "
+ "%ld and %ld\n", ret, min, max);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+/*
+ * Attribute operations for netconsole_target.
+ */
+
+static ssize_t show_enabled(struct netconsole_target *nt, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", nt->enabled);
+}
+
+static ssize_t show_dev_name(struct netconsole_target *nt, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", nt->np.dev_name);
+}
+
+static ssize_t show_local_port(struct netconsole_target *nt, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", nt->np.local_port);
+}
+
+static ssize_t show_remote_port(struct netconsole_target *nt, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", nt->np.remote_port);
+}
+
+static ssize_t show_local_ip(struct netconsole_target *nt, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d.%d.%d.%d\n",
+ HIPQUAD(nt->np.local_ip));
+}
+
+static ssize_t show_remote_ip(struct netconsole_target *nt, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d.%d.%d.%d\n",
+ HIPQUAD(nt->np.remote_ip));
+}
+
+static ssize_t show_local_mac(struct netconsole_target *nt, char *buf)
+{
+ DECLARE_MAC_BUF(mac);
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ print_mac(mac, nt->np.local_mac));
+}
+
+static ssize_t show_remote_mac(struct netconsole_target *nt, char *buf)
+{
+ DECLARE_MAC_BUF(mac);
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ print_mac(mac, nt->np.remote_mac));
+}
-static int init_netconsole(void)
+/*
+ * This one is special -- targets created through the configfs interface
+ * are not enabled (and the corresponding netpoll activated) by default.
+ * The user is expected to set the desired parameters first (which
+ * would enable him to dynamically add new netpoll targets for new
+ * network interfaces as and when they come up).
+ */
+static ssize_t store_enabled(struct netconsole_target *nt,
+ const char *buf,
+ size_t count)
{
int err;
+ long enabled;
+
+ enabled = strtol10_check_range(buf, 0, 1);
+ if (enabled < 0)
+ return enabled;
+
+ 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)
+ return err;
+
+ printk(KERN_INFO "netconsole: network logging started\n");
+
+ } else { /* 0 */
+ netpoll_cleanup(&nt->np);
+ }
+
+ nt->enabled = enabled;
+
+ return strnlen(buf, count);
+}
+
+static ssize_t store_dev_name(struct netconsole_target *nt,
+ const char *buf,
+ size_t 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));
+ return -EINVAL;
+ }
+
+ strlcpy(nt->np.dev_name, buf, IFNAMSIZ);
+
+ /* Get rid of possible trailing newline from echo(1) */
+ len = strnlen(nt->np.dev_name, IFNAMSIZ);
+ if (nt->np.dev_name[len - 1] == '\n')
+ nt->np.dev_name[len - 1] = '\0';
+
+ return strnlen(buf, count);
+}
+
+static ssize_t store_local_port(struct netconsole_target *nt,
+ const char *buf,
+ size_t count)
+{
+ long local_port;
+#define __U16_MAX ((__u16) ~0U)
+
+ if (nt->enabled) {
+ printk(KERN_ERR "netconsole: target (%s) is enabled, "
+ "disable to update parameters\n",
+ config_item_name(&nt->item));
+ return -EINVAL;
+ }
+
+ local_port = strtol10_check_range(buf, 0, __U16_MAX);
+ if (local_port < 0)
+ return local_port;
+
+ nt->np.local_port = local_port;
+
+ return strnlen(buf, count);
+}
+
+static ssize_t store_remote_port(struct netconsole_target *nt,
+ const char *buf,
+ size_t count)
+{
+ long remote_port;
+#define __U16_MAX ((__u16) ~0U)
+
+ if (nt->enabled) {
+ printk(KERN_ERR "netconsole: target (%s) is enabled, "
+ "disable to update parameters\n",
+ config_item_name(&nt->item));
+ return -EINVAL;
+ }
+
+ remote_port = strtol10_check_range(buf, 0, __U16_MAX);
+ if (remote_port < 0)
+ return remote_port;
+
+ nt->np.remote_port = remote_port;
+
+ return strnlen(buf, count);
+}
+
+static ssize_t store_local_ip(struct netconsole_target *nt,
+ const char *buf,
+ size_t count)
+{
+ if (nt->enabled) {
+ printk(KERN_ERR "netconsole: target (%s) is enabled, "
+ "disable to update parameters\n",
+ config_item_name(&nt->item));
+ return -EINVAL;
+ }
+
+ nt->np.local_ip = ntohl(in_aton(buf));
+
+ return strnlen(buf, count);
+}
+
+static ssize_t store_remote_ip(struct netconsole_target *nt,
+ const char *buf,
+ size_t count)
+{
+ if (nt->enabled) {
+ printk(KERN_ERR "netconsole: target (%s) is enabled, "
+ "disable to update parameters\n",
+ config_item_name(&nt->item));
+ return -EINVAL;
+ }
+
+ nt->np.remote_ip = ntohl(in_aton(buf));
+
+ return strnlen(buf, count);
+}
+
+static ssize_t store_remote_mac(struct netconsole_target *nt,
+ const char *buf,
+ size_t count)
+{
+ u8 remote_mac[ETH_ALEN];
+ char *p = (char *) buf;
+ int i;
- if(strlen(config))
- option_setup(config);
+ if (nt->enabled) {
+ printk(KERN_ERR "netconsole: target (%s) is enabled, "
+ "disable to update parameters\n",
+ config_item_name(&nt->item));
+ return -EINVAL;
+ }
- if(!configured) {
- printk("netconsole: not configured, aborting\n");
- return 0;
+ for (i = 0; i < ETH_ALEN - 1; i++) {
+ remote_mac[i] = simple_strtoul(p, &p, 16);
+ if (*p != ':')
+ goto invalid;
+ p++;
}
+ remote_mac[ETH_ALEN - 1] = simple_strtoul(p, &p, 16);
+ if (*p && (*p != '\n'))
+ goto invalid;
+
+ memcpy(nt->np.remote_mac, remote_mac, ETH_ALEN);
+
+ return strnlen(buf, count);
+
+invalid:
+ printk(KERN_ERR "netconsole: invalid input\n");
+ return -EINVAL;
+}
+
+/*
+ * Attribute definitions for netconsole_target.
+ */
+
+#define NETCONSOLE_TARGET_ATTR_RO(_name) \
+static struct netconsole_target_attr netconsole_target_##_name = \
+ __CONFIGFS_ATTR(_name, S_IRUGO, show_##_name, NULL)
- err = netpoll_setup(&np);
+#define NETCONSOLE_TARGET_ATTR_RW(_name) \
+static struct netconsole_target_attr netconsole_target_##_name = \
+ __CONFIGFS_ATTR(_name, S_IRUGO | S_IWUSR, show_##_name, store_##_name)
+
+NETCONSOLE_TARGET_ATTR_RW(enabled);
+NETCONSOLE_TARGET_ATTR_RW(dev_name);
+NETCONSOLE_TARGET_ATTR_RW(local_port);
+NETCONSOLE_TARGET_ATTR_RW(remote_port);
+NETCONSOLE_TARGET_ATTR_RW(local_ip);
+NETCONSOLE_TARGET_ATTR_RW(remote_ip);
+NETCONSOLE_TARGET_ATTR_RO(local_mac);
+NETCONSOLE_TARGET_ATTR_RW(remote_mac);
+
+static struct configfs_attribute *netconsole_target_attrs[] = {
+ &netconsole_target_enabled.attr,
+ &netconsole_target_dev_name.attr,
+ &netconsole_target_local_port.attr,
+ &netconsole_target_remote_port.attr,
+ &netconsole_target_local_ip.attr,
+ &netconsole_target_remote_ip.attr,
+ &netconsole_target_local_mac.attr,
+ &netconsole_target_remote_mac.attr,
+ NULL,
+};
+
+/*
+ * Item operations and type for netconsole_target.
+ */
+
+static void netconsole_target_release(struct config_item *item)
+{
+ kfree(to_target(item));
+}
+
+static ssize_t netconsole_target_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *buf)
+{
+ ssize_t ret = -EINVAL;
+ struct netconsole_target *nt = to_target(item);
+ struct netconsole_target_attr *na =
+ container_of(attr, struct netconsole_target_attr, attr);
+
+ if (na->show)
+ ret = na->show(nt, buf);
+
+ return ret;
+}
+
+static ssize_t netconsole_target_attr_store(struct config_item *item,
+ struct configfs_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ ssize_t ret = -EINVAL;
+ struct netconsole_target *nt = to_target(item);
+ struct netconsole_target_attr *na =
+ container_of(attr, struct netconsole_target_attr, attr);
+
+ if (na->store)
+ ret = na->store(nt, buf, count);
+
+ return ret;
+}
+
+static struct configfs_item_operations netconsole_target_item_ops = {
+ .release = netconsole_target_release,
+ .show_attribute = netconsole_target_attr_show,
+ .store_attribute = netconsole_target_attr_store,
+};
+
+static struct config_item_type netconsole_target_type = {
+ .ct_attrs = netconsole_target_attrs,
+ .ct_item_ops = &netconsole_target_item_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Group operations and type for netconsole_subsys.
+ */
+
+static struct config_item *make_netconsole_target(struct config_group *group,
+ const char *name)
+{
+ unsigned long flags;
+ struct netconsole_target *nt;
+
+ /*
+ * Allocate and initialize with defaults.
+ * Target is disabled at creation (enabled == 0).
+ */
+ nt = kzalloc(sizeof(*nt), GFP_KERNEL);
+ if (!nt) {
+ printk(KERN_ERR "netconsole: failed to allocate memory\n");
+ return NULL;
+ }
+
+ nt->np.name = "netconsole";
+ strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ);
+ nt->np.local_port = 6665;
+ nt->np.remote_port = 6666;
+ memset(nt->np.remote_mac, 0xff, ETH_ALEN);
+
+ /* Initialize the config_item member */
+ config_item_init_type_name(&nt->item, name, &netconsole_target_type);
+
+ /* Adding, but it is disabled */
+ spin_lock_irqsave(&target_list_lock, flags);
+ list_add(&nt->list, &target_list);
+ spin_unlock_irqrestore(&target_list_lock, flags);
+
+ return &nt->item;
+}
+
+static void drop_netconsole_target(struct config_group *group,
+ struct config_item *item)
+{
+ unsigned long flags;
+ struct netconsole_target *nt = to_target(item);
+
+ spin_lock_irqsave(&target_list_lock, flags);
+ list_del(&nt->list);
+ spin_unlock_irqrestore(&target_list_lock, flags);
+
+ /*
+ * The target may have never been enabled, or was manually disabled
+ * before being removed so netpoll may have already been cleaned up.
+ */
+ if (nt->enabled)
+ netpoll_cleanup(&nt->np);
+
+ config_item_put(&nt->item);
+}
+
+static struct configfs_group_operations netconsole_subsys_group_ops = {
+ .make_item = make_netconsole_target,
+ .drop_item = drop_netconsole_target,
+};
+
+static struct config_item_type netconsole_subsys_type = {
+ .ct_group_ops = &netconsole_subsys_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* The netconsole configfs subsystem */
+static struct configfs_subsystem netconsole_subsys = {
+ .su_group = {
+ .cg_item = {
+ .ci_namebuf = "netconsole",
+ .ci_type = &netconsole_subsys_type,
+ },
+ },
+};
+
+#endif /* CONFIG_NETCONSOLE_DYNAMIC */
+
+/* Handle network interface device notifications */
+static int netconsole_netdev_event(struct notifier_block *this,
+ unsigned long event,
+ void *ptr)
+{
+ unsigned long flags;
+ struct netconsole_target *nt;
+ struct net_device *dev = ptr;
+
+ if (!(event == NETDEV_CHANGEADDR || event == NETDEV_CHANGENAME))
+ goto done;
+
+ spin_lock_irqsave(&target_list_lock, flags);
+ list_for_each_entry(nt, &target_list, list) {
+ netconsole_target_get(nt);
+ if (nt->np.dev == dev) {
+ switch (event) {
+ case NETDEV_CHANGEADDR:
+ memcpy(nt->np.local_mac, dev->dev_addr, ETH_ALEN);
+ break;
+
+ case NETDEV_CHANGENAME:
+ strlcpy(nt->np.dev_name, dev->name, IFNAMSIZ);
+ break;
+ }
+ }
+ netconsole_target_put(nt);
+ }
+ spin_unlock_irqrestore(&target_list_lock, flags);
+
+done:
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block netconsole_netdev_notifier = {
+ .notifier_call = netconsole_netdev_event,
+};
+
+static void write_msg(struct console *con, const char *msg, unsigned int len)
+{
+ int frag, left;
+ unsigned long flags;
+ struct netconsole_target *nt;
+ const char *tmp;
+
+ /* Avoid taking lock and disabling interrupts unnecessarily */
+ if (list_empty(&target_list))
+ return;
+
+ spin_lock_irqsave(&target_list_lock, flags);
+ list_for_each_entry(nt, &target_list, list) {
+ netconsole_target_get(nt);
+ if (nt->enabled && netif_running(nt->np.dev)) {
+ /*
+ * We nest this inside the for-each-target loop above
+ * so that we're able to get as much logging out to
+ * at least one target if we die inside here, instead
+ * of unnecessarily keeping all targets in lock-step.
+ */
+ tmp = msg;
+ for (left = len; left;) {
+ frag = min(left, MAX_PRINT_CHUNK);
+ netpoll_send_udp(&nt->np, tmp, frag);
+ tmp += frag;
+ left -= frag;
+ }
+ }
+ netconsole_target_put(nt);
+ }
+ spin_unlock_irqrestore(&target_list_lock, flags);
+}
+
+static struct console netconsole = {
+ .name = "netcon",
+ .flags = CON_ENABLED | CON_PRINTBUFFER,
+ .write = write_msg,
+};
+
+static int __init init_netconsole(void)
+{
+ int err;
+ struct netconsole_target *nt, *tmp;
+ unsigned long flags;
+ char *target_config;
+ char *input = config;
+
+ if (strnlen(input, MAX_PARAM_LENGTH)) {
+ while ((target_config = strsep(&input, ";"))) {
+ nt = alloc_param_target(target_config);
+ if (IS_ERR(nt)) {
+ err = PTR_ERR(nt);
+ goto fail;
+ }
+ spin_lock_irqsave(&target_list_lock, flags);
+ list_add(&nt->list, &target_list);
+ spin_unlock_irqrestore(&target_list_lock, flags);
+ }
+ }
+
+ err = register_netdevice_notifier(&netconsole_netdev_notifier);
+ if (err)
+ goto fail;
+
+ err = dynamic_netconsole_init();
if (err)
- return err;
+ goto undonotifier;
register_console(&netconsole);
printk(KERN_INFO "netconsole: network logging started\n");
- return 0;
+
+ return err;
+
+undonotifier:
+ unregister_netdevice_notifier(&netconsole_netdev_notifier);
+
+fail:
+ printk(KERN_ERR "netconsole: cleaning up\n");
+
+ /*
+ * Remove all targets and destroy them (only targets created
+ * from the boot/module option exist here). Skipping the list
+ * lock is safe here, and netpoll_cleanup() will sleep.
+ */
+ list_for_each_entry_safe(nt, tmp, &target_list, list) {
+ list_del(&nt->list);
+ free_param_target(nt);
+ }
+
+ return err;
}
-static void cleanup_netconsole(void)
+static void __exit cleanup_netconsole(void)
{
+ struct netconsole_target *nt, *tmp;
+
unregister_console(&netconsole);
- netpoll_cleanup(&np);
+ dynamic_netconsole_exit();
+ unregister_netdevice_notifier(&netconsole_netdev_notifier);
+
+ /*
+ * Targets created via configfs pin references on our module
+ * and would first be rmdir(2)'ed from userspace. We reach
+ * here only when they are already destroyed, and only those
+ * created from the boot/module option are left, so remove and
+ * destroy them. Skipping the list lock is safe here, and
+ * netpoll_cleanup() will sleep.
+ */
+ list_for_each_entry_safe(nt, tmp, &target_list, list) {
+ list_del(&nt->list);
+ free_param_target(nt);
+ }
}
module_init(init_netconsole);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 19:47:54 +0000