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Message-ID: <20101214212937.17022.22393.stgit@mike.mtv.corp.google.com>
Date: Tue, 14 Dec 2010 13:29:37 -0800
From: Mike Waychison <mikew@...gle.com>
To: simon.kagstrom@...insight.net, davem@...emloft.net,
nhorman@...driver.com, Matt Mackall <mpm@...enic.com>
Cc: adurbin@...gle.com, linux-kernel@...r.kernel.org,
chavey@...gle.com, Greg KH <greg@...ah.com>,
netdev@...r.kernel.org,
Américo Wang <xiyou.wangcong@...il.com>,
akpm@...ux-foundation.org, linux-api@...r.kernel.org
Subject: [PATCH v3 08/22] netconsole: Split out netpoll_targets init/exit
As part of the factoring to move target handling out of netconsole,
abstract the construction and destruction of struct netpoll_targets
into their own functions.
Signed-off-by: Mike Waychison <mikew@...gle.com>
Acked-by: Matt Mackall <mpm@...enic.com>
---
drivers/net/netconsole.c | 69 ++++++++++++++++++++++++++++------------------
1 files changed, 42 insertions(+), 27 deletions(-)
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index fed427d..57451a7 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -663,13 +663,14 @@ static struct config_item_type netconsole_subsys_type = {
.ct_owner = THIS_MODULE,
};
-static int __init dynamic_netpoll_targets_init(struct netpoll_targets *nts)
+static int __init dynamic_netpoll_targets_init(const char *subsys_name,
+ struct netpoll_targets *nts)
{
struct configfs_subsystem *subsys = &nts->configfs_subsys;
config_group_init(&subsys->su_group);
mutex_init(&subsys->su_mutex);
- strncpy((char *)&subsys->su_group.cg_item.ci_namebuf, "netconsole",
+ strncpy((char *)&subsys->su_group.cg_item.ci_namebuf, subsys_name,
CONFIGFS_ITEM_NAME_LEN);
subsys->su_group.cg_item.ci_type = &netconsole_subsys_type;
return configfs_register_subsystem(subsys);
@@ -817,13 +818,15 @@ static struct console netconsole = {
.write = write_msg,
};
-static int __init init_netconsole(void)
+static int __init register_netpoll_targets(const char *subsys_name,
+ struct netpoll_targets *nts,
+ char *static_targets)
{
int err;
struct netconsole_target *nt, *tmp;
- unsigned long flags;
char *target_config;
- char *input = config;
+ char *input = static_targets;
+ unsigned long flags;
if (strnlen(input, MAX_PARAM_LENGTH)) {
while ((target_config = strsep(&input, ";"))) {
@@ -832,41 +835,33 @@ static int __init init_netconsole(void)
err = PTR_ERR(nt);
goto fail;
}
- /* Dump existing printks when we register */
- netconsole.flags |= CON_PRINTBUFFER;
- spin_lock_irqsave(&targets.lock, flags);
- list_add(&nt->list, &targets.list);
- spin_unlock_irqrestore(&targets.lock, flags);
+ spin_lock_irqsave(&nts->lock, flags);
+ list_add(&nt->list, &nts->list);
+ spin_unlock_irqrestore(&nts->lock, flags);
}
}
- targets.netdev_notifier.notifier_call = netconsole_netdev_event;
- err = register_netdevice_notifier(&targets.netdev_notifier);
+ nts->netdev_notifier.notifier_call = netconsole_netdev_event;
+ err = register_netdevice_notifier(&nts->netdev_notifier);
if (err)
goto fail;
- err = dynamic_netpoll_targets_init(&targets);
+ err = dynamic_netpoll_targets_init(subsys_name, nts);
if (err)
goto undonotifier;
- register_console(&netconsole);
- printk(KERN_INFO "netconsole: network logging started\n");
-
- return err;
+ return 0;
undonotifier:
- unregister_netdevice_notifier(&targets.netdev_notifier);
-
+ unregister_netdevice_notifier(&nts->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, &targets.list, list) {
+ list_for_each_entry_safe(nt, tmp, &nts->list, list) {
list_del(&nt->list);
free_param_target(nt);
}
@@ -874,13 +869,12 @@ fail:
return err;
}
-static void __exit cleanup_netconsole(void)
+static void __exit unregister_netpoll_targets(struct netpoll_targets *nts)
{
struct netconsole_target *nt, *tmp;
- unregister_console(&netconsole);
- dynamic_netpoll_targets_exit(&targets);
- unregister_netdevice_notifier(&targets.netdev_notifier);
+ dynamic_netpoll_targets_exit(nts);
+ unregister_netdevice_notifier(&nts->netdev_notifier);
/*
* Targets created via configfs pin references on our module
@@ -890,11 +884,32 @@ static void __exit cleanup_netconsole(void)
* destroy them. Skipping the list lock is safe here, and
* netpoll_cleanup() will sleep.
*/
- list_for_each_entry_safe(nt, tmp, &targets.list, list) {
+ list_for_each_entry_safe(nt, tmp, &nts->list, list) {
list_del(&nt->list);
free_param_target(nt);
}
}
+static int __init init_netconsole(void)
+{
+ int err;
+ err = register_netpoll_targets("netconsole", &targets, config);
+ if (err)
+ return err;
+ /* Dump existing printks if we registered any targets */
+ if (!list_empty(&targets.list))
+ netconsole.flags |= CON_PRINTBUFFER;
+ register_console(&netconsole);
+ printk(KERN_INFO "netconsole: network logging started\n");
+
+ return 0;
+}
+
+static void __exit cleanup_netconsole(void)
+{
+ unregister_console(&netconsole);
+ unregister_netpoll_targets(&targets);
+}
+
module_init(init_netconsole);
module_exit(cleanup_netconsole);
--
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