diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-20 21:04:44 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-20 21:04:44 -0700 |
commit | f8965467f366fd18f01feafb5db10512d7b4422c (patch) | |
tree | 3706a9cd779859271ca61b85c63a1bc3f82d626e /net/netfilter/xt_LED.c | |
parent | a26272e5200765691e67d6780e52b32498fdb659 (diff) | |
parent | 2ec8c6bb5d8f3a62a79f463525054bae1e3d4487 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1674 commits)
qlcnic: adding co maintainer
ixgbe: add support for active DA cables
ixgbe: dcb, do not tag tc_prio_control frames
ixgbe: fix ixgbe_tx_is_paused logic
ixgbe: always enable vlan strip/insert when DCB is enabled
ixgbe: remove some redundant code in setting FCoE FIP filter
ixgbe: fix wrong offset to fc_frame_header in ixgbe_fcoe_ddp
ixgbe: fix header len when unsplit packet overflows to data buffer
ipv6: Never schedule DAD timer on dead address
ipv6: Use POSTDAD state
ipv6: Use state_lock to protect ifa state
ipv6: Replace inet6_ifaddr->dead with state
cxgb4: notify upper drivers if the device is already up when they load
cxgb4: keep interrupts available when the ports are brought down
cxgb4: fix initial addition of MAC address
cnic: Return SPQ credit to bnx2x after ring setup and shutdown.
cnic: Convert cnic_local_flags to atomic ops.
can: Fix SJA1000 command register writes on SMP systems
bridge: fix build for CONFIG_SYSFS disabled
ARCNET: Limit com20020 PCI ID matches for SOHARD cards
...
Fix up various conflicts with pcmcia tree drivers/net/
{pcmcia/3c589_cs.c, wireless/orinoco/orinoco_cs.c and
wireless/orinoco/spectrum_cs.c} and feature removal
(Documentation/feature-removal-schedule.txt).
Also fix a non-content conflict due to pm_qos_requirement getting
renamed in the PM tree (now pm_qos_request) in net/mac80211/scan.c
Diffstat (limited to 'net/netfilter/xt_LED.c')
-rw-r--r-- | net/netfilter/xt_LED.c | 93 |
1 files changed, 72 insertions, 21 deletions
diff --git a/net/netfilter/xt_LED.c b/net/netfilter/xt_LED.c index 3271c8e52153..a4140509eea1 100644 --- a/net/netfilter/xt_LED.c +++ b/net/netfilter/xt_LED.c @@ -18,7 +18,7 @@ * 02110-1301 USA. * */ - +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/skbuff.h> #include <linux/netfilter/x_tables.h> @@ -32,18 +32,24 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Adam Nielsen <a.nielsen@shikadi.net>"); MODULE_DESCRIPTION("Xtables: trigger LED devices on packet match"); +static LIST_HEAD(xt_led_triggers); +static DEFINE_MUTEX(xt_led_mutex); + /* * This is declared in here (the kernel module) only, to avoid having these * dependencies in userspace code. This is what xt_led_info.internal_data * points to. */ struct xt_led_info_internal { + struct list_head list; + int refcnt; + char *trigger_id; struct led_trigger netfilter_led_trigger; struct timer_list timer; }; static unsigned int -led_tg(struct sk_buff *skb, const struct xt_target_param *par) +led_tg(struct sk_buff *skb, const struct xt_action_param *par) { const struct xt_led_info *ledinfo = par->targinfo; struct xt_led_info_internal *ledinternal = ledinfo->internal_data; @@ -54,7 +60,7 @@ led_tg(struct sk_buff *skb, const struct xt_target_param *par) */ if ((ledinfo->delay > 0) && ledinfo->always_blink && timer_pending(&ledinternal->timer)) - led_trigger_event(&ledinternal->netfilter_led_trigger,LED_OFF); + led_trigger_event(&ledinternal->netfilter_led_trigger, LED_OFF); led_trigger_event(&ledinternal->netfilter_led_trigger, LED_FULL); @@ -75,54 +81,86 @@ led_tg(struct sk_buff *skb, const struct xt_target_param *par) static void led_timeout_callback(unsigned long data) { - struct xt_led_info *ledinfo = (struct xt_led_info *)data; - struct xt_led_info_internal *ledinternal = ledinfo->internal_data; + struct xt_led_info_internal *ledinternal = (struct xt_led_info_internal *)data; led_trigger_event(&ledinternal->netfilter_led_trigger, LED_OFF); } -static bool led_tg_check(const struct xt_tgchk_param *par) +static struct xt_led_info_internal *led_trigger_lookup(const char *name) +{ + struct xt_led_info_internal *ledinternal; + + list_for_each_entry(ledinternal, &xt_led_triggers, list) { + if (!strcmp(name, ledinternal->netfilter_led_trigger.name)) { + return ledinternal; + } + } + return NULL; +} + +static int led_tg_check(const struct xt_tgchk_param *par) { struct xt_led_info *ledinfo = par->targinfo; struct xt_led_info_internal *ledinternal; int err; if (ledinfo->id[0] == '\0') { - printk(KERN_ERR KBUILD_MODNAME ": No 'id' parameter given.\n"); - return false; + pr_info("No 'id' parameter given.\n"); + return -EINVAL; } - ledinternal = kzalloc(sizeof(struct xt_led_info_internal), GFP_KERNEL); - if (!ledinternal) { - printk(KERN_CRIT KBUILD_MODNAME ": out of memory\n"); - return false; + mutex_lock(&xt_led_mutex); + + ledinternal = led_trigger_lookup(ledinfo->id); + if (ledinternal) { + ledinternal->refcnt++; + goto out; } - ledinternal->netfilter_led_trigger.name = ledinfo->id; + err = -ENOMEM; + ledinternal = kzalloc(sizeof(struct xt_led_info_internal), GFP_KERNEL); + if (!ledinternal) + goto exit_mutex_only; + + ledinternal->trigger_id = kstrdup(ledinfo->id, GFP_KERNEL); + if (!ledinternal->trigger_id) + goto exit_internal_alloc; + + ledinternal->refcnt = 1; + ledinternal->netfilter_led_trigger.name = ledinternal->trigger_id; err = led_trigger_register(&ledinternal->netfilter_led_trigger); if (err) { - printk(KERN_CRIT KBUILD_MODNAME - ": led_trigger_register() failed\n"); + pr_warning("led_trigger_register() failed\n"); if (err == -EEXIST) - printk(KERN_ERR KBUILD_MODNAME - ": Trigger name is already in use.\n"); + pr_warning("Trigger name is already in use.\n"); goto exit_alloc; } /* See if we need to set up a timer */ if (ledinfo->delay > 0) setup_timer(&ledinternal->timer, led_timeout_callback, - (unsigned long)ledinfo); + (unsigned long)ledinternal); + + list_add_tail(&ledinternal->list, &xt_led_triggers); + +out: + mutex_unlock(&xt_led_mutex); ledinfo->internal_data = ledinternal; - return true; + return 0; exit_alloc: + kfree(ledinternal->trigger_id); + +exit_internal_alloc: kfree(ledinternal); - return false; +exit_mutex_only: + mutex_unlock(&xt_led_mutex); + + return err; } static void led_tg_destroy(const struct xt_tgdtor_param *par) @@ -130,10 +168,23 @@ static void led_tg_destroy(const struct xt_tgdtor_param *par) const struct xt_led_info *ledinfo = par->targinfo; struct xt_led_info_internal *ledinternal = ledinfo->internal_data; + mutex_lock(&xt_led_mutex); + + if (--ledinternal->refcnt) { + mutex_unlock(&xt_led_mutex); + return; + } + + list_del(&ledinternal->list); + if (ledinfo->delay > 0) del_timer_sync(&ledinternal->timer); led_trigger_unregister(&ledinternal->netfilter_led_trigger); + + mutex_unlock(&xt_led_mutex); + + kfree(ledinternal->trigger_id); kfree(ledinternal); } @@ -142,7 +193,7 @@ static struct xt_target led_tg_reg __read_mostly = { .revision = 0, .family = NFPROTO_UNSPEC, .target = led_tg, - .targetsize = XT_ALIGN(sizeof(struct xt_led_info)), + .targetsize = sizeof(struct xt_led_info), .checkentry = led_tg_check, .destroy = led_tg_destroy, .me = THIS_MODULE, |