diff options
| -rw-r--r-- | net/iucv/af_iucv.c | 147 |
1 files changed, 144 insertions, 3 deletions
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index a9b3a6f9ea95..656cbd195825 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -1,11 +1,12 @@ /* - * linux/net/iucv/af_iucv.c - * * IUCV protocol stack for Linux on zSeries * - * Copyright 2006 IBM Corporation + * Copyright IBM Corp. 2006, 2009 * * Author(s): Jennifer Hunt <jenhunt@us.ibm.com> + * Hendrik Brueckner <brueckner@linux.vnet.ibm.com> + * PM functions: + * Ursula Braun <ursula.braun@de.ibm.com> */ #define KMSG_COMPONENT "af_iucv" @@ -90,6 +91,122 @@ static inline void low_nmcpy(unsigned char *dst, char *src) memcpy(&dst[8], src, 8); } +static int afiucv_pm_prepare(struct device *dev) +{ +#ifdef CONFIG_PM_DEBUG + printk(KERN_WARNING "afiucv_pm_prepare\n"); +#endif + return 0; +} + +static void afiucv_pm_complete(struct device *dev) +{ +#ifdef CONFIG_PM_DEBUG + printk(KERN_WARNING "afiucv_pm_complete\n"); +#endif + return; +} + +/** + * afiucv_pm_freeze() - Freeze PM callback + * @dev: AFIUCV dummy device + * + * Sever all established IUCV communication pathes + */ +static int afiucv_pm_freeze(struct device *dev) +{ + struct iucv_sock *iucv; + struct sock *sk; + struct hlist_node *node; + int err = 0; + +#ifdef CONFIG_PM_DEBUG + printk(KERN_WARNING "afiucv_pm_freeze\n"); +#endif + read_lock(&iucv_sk_list.lock); + sk_for_each(sk, node, &iucv_sk_list.head) { + iucv = iucv_sk(sk); + skb_queue_purge(&iucv->send_skb_q); + skb_queue_purge(&iucv->backlog_skb_q); + switch (sk->sk_state) { + case IUCV_SEVERED: + case IUCV_DISCONN: + case IUCV_CLOSING: + case IUCV_CONNECTED: + if (iucv->path) { + err = iucv_path_sever(iucv->path, NULL); + iucv_path_free(iucv->path); + iucv->path = NULL; + } + break; + case IUCV_OPEN: + case IUCV_BOUND: + case IUCV_LISTEN: + case IUCV_CLOSED: + default: + break; + } + } + read_unlock(&iucv_sk_list.lock); + return err; +} + +/** + * afiucv_pm_restore_thaw() - Thaw and restore PM callback + * @dev: AFIUCV dummy device + * + * socket clean up after freeze + */ +static int afiucv_pm_restore_thaw(struct device *dev) +{ + struct iucv_sock *iucv; + struct sock *sk; + struct hlist_node *node; + +#ifdef CONFIG_PM_DEBUG + printk(KERN_WARNING "afiucv_pm_restore_thaw\n"); +#endif + read_lock(&iucv_sk_list.lock); + sk_for_each(sk, node, &iucv_sk_list.head) { + iucv = iucv_sk(sk); + switch (sk->sk_state) { + case IUCV_CONNECTED: + sk->sk_err = EPIPE; + sk->sk_state = IUCV_DISCONN; + sk->sk_state_change(sk); + break; + case IUCV_DISCONN: + case IUCV_SEVERED: + case IUCV_CLOSING: + case IUCV_LISTEN: + case IUCV_BOUND: + case IUCV_OPEN: + default: + break; + } + } + read_unlock(&iucv_sk_list.lock); + return 0; +} + +static struct dev_pm_ops afiucv_pm_ops = { + .prepare = afiucv_pm_prepare, + .complete = afiucv_pm_complete, + .freeze = afiucv_pm_freeze, + .thaw = afiucv_pm_restore_thaw, + .restore = afiucv_pm_restore_thaw, +}; + +static struct device_driver af_iucv_driver = { + .owner = THIS_MODULE, + .name = "afiucv", + .bus = &iucv_bus, + .pm = &afiucv_pm_ops, +}; + +/* dummy device used as trigger for PM functions */ +static struct device *af_iucv_dev; + /** * iucv_msg_length() - Returns the length of an iucv message. * @msg: Pointer to struct iucv_message, MUST NOT be NULL @@ -1556,8 +1673,30 @@ static int __init afiucv_init(void) err = sock_register(&iucv_sock_family_ops); if (err) goto out_proto; + /* establish dummy device */ + err = driver_register(&af_iucv_driver); + if (err) + goto out_sock; + af_iucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); + if (!af_iucv_dev) { + err = -ENOMEM; + goto out_driver; + } + dev_set_name(af_iucv_dev, "af_iucv"); + af_iucv_dev->bus = &iucv_bus; + af_iucv_dev->parent = iucv_root; + af_iucv_dev->release = (void (*)(struct device *))kfree; + af_iucv_dev->driver = &af_iucv_driver; + err = device_register(af_iucv_dev); + if (err) + goto out_driver; + return 0; +out_driver: + driver_unregister(&af_iucv_driver); +out_sock: + sock_unregister(PF_IUCV); out_proto: proto_unregister(&iucv_proto); out_iucv: @@ -1568,6 +1707,8 @@ out: static void __exit afiucv_exit(void) { + device_unregister(af_iucv_dev); + driver_unregister(&af_iucv_driver); sock_unregister(PF_IUCV); proto_unregister(&iucv_proto); iucv_unregister(&af_iucv_handler, 0); |