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Commit 85bac6a5 authored by David S. Miller's avatar David S. Miller
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Merge branch 'iucv-next' 

Julian Wiedmann says:

====================
net/iucv: updates 2020-05-19

please apply the following patch series for iucv to netdev's net-next
tree.

s390 dropped its support for power management, this removes the relevant
iucv code. Also, some easy cleanups I found mouldering in an old branch.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 2de49925 e9a36ca5
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Showing with 54 additions and 395 deletions
include/net/iucv/af_iucv.h
View file @ 85bac6a5
......@@ -158,12 +158,4 @@ struct iucv_sock_list {
atomic_t autobind_name;
};
__poll_t iucv_sock_poll(struct file *file, struct socket *sock,
poll_table *wait);
void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
void iucv_accept_unlink(struct sock *sk);
struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
#endif /* __IUCV_H */
net/iucv/af_iucv.c
View file @ 85bac6a5
......@@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/limits.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/kernel.h>
......@@ -36,8 +37,6 @@
static char iucv_userid[80];
static const struct proto_ops iucv_sock_ops;
static struct proto iucv_proto = {
.name = "AF_IUCV",
.owner = THIS_MODULE,
......@@ -85,14 +84,11 @@ do { \
__ret; \
})
static struct sock *iucv_accept_dequeue(struct sock *parent,
struct socket *newsock);
static void iucv_sock_kill(struct sock *sk);
static void iucv_sock_close(struct sock *sk);
static void iucv_sever_path(struct sock *, int);
static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev);
static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock,
struct sk_buff *skb, u8 flags);
static void afiucv_hs_callback_txnotify(struct sk_buff *, enum iucv_tx_notify);
/* Call Back functions */
......@@ -127,110 +123,6 @@ 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
}
/**
* 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;
#ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "afiucv_pm_freeze\n");
#endif
read_lock(&iucv_sk_list.lock);
sk_for_each(sk, &iucv_sk_list.head) {
iucv = iucv_sk(sk);
switch (sk->sk_state) {
case IUCV_DISCONN:
case IUCV_CLOSING:
case IUCV_CONNECTED:
iucv_sever_path(sk, 0);
break;
case IUCV_OPEN:
case IUCV_BOUND:
case IUCV_LISTEN:
case IUCV_CLOSED:
default:
break;
}
skb_queue_purge(&iucv->send_skb_q);
skb_queue_purge(&iucv->backlog_skb_q);
}
read_unlock(&iucv_sk_list.lock);
return 0;
}
/**
* 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 sock *sk;
#ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "afiucv_pm_restore_thaw\n");
#endif
read_lock(&iucv_sk_list.lock);
sk_for_each(sk, &iucv_sk_list.head) {
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_CLOSING:
case IUCV_LISTEN:
case IUCV_BOUND:
case IUCV_OPEN:
default:
break;
}
}
read_unlock(&iucv_sk_list.lock);
return 0;
}
static const 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 = NULL,
.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
......@@ -435,6 +327,20 @@ static void iucv_sock_cleanup_listen(struct sock *parent)
parent->sk_state = IUCV_CLOSED;
}
static void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk)
{
write_lock_bh(&l->lock);
sk_add_node(sk, &l->head);
write_unlock_bh(&l->lock);
}
static void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk)
{
write_lock_bh(&l->lock);
sk_del_node_init(sk);
write_unlock_bh(&l->lock);
}
/* Kill socket (only if zapped and orphaned) */
static void iucv_sock_kill(struct sock *sk)
{
......@@ -607,53 +513,7 @@ static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio,
return sk;
}
/* Create an IUCV socket */
static int iucv_sock_create(struct net *net, struct socket *sock, int protocol,
int kern)
{
struct sock *sk;
if (protocol && protocol != PF_IUCV)
return -EPROTONOSUPPORT;
sock->state = SS_UNCONNECTED;
switch (sock->type) {
case SOCK_STREAM:
sock->ops = &iucv_sock_ops;
break;
case SOCK_SEQPACKET:
/* currently, proto ops can handle both sk types */
sock->ops = &iucv_sock_ops;
break;
default:
return -ESOCKTNOSUPPORT;
}
sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL, kern);
if (!sk)
return -ENOMEM;
iucv_sock_init(sk, NULL);
return 0;
}
void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk)
{
write_lock_bh(&l->lock);
sk_add_node(sk, &l->head);
write_unlock_bh(&l->lock);
}
void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk)
{
write_lock_bh(&l->lock);
sk_del_node_init(sk);
write_unlock_bh(&l->lock);
}
void iucv_accept_enqueue(struct sock *parent, struct sock *sk)
static void iucv_accept_enqueue(struct sock *parent, struct sock *sk)
{
unsigned long flags;
struct iucv_sock *par = iucv_sk(parent);
......@@ -666,7 +526,7 @@ void iucv_accept_enqueue(struct sock *parent, struct sock *sk)
sk_acceptq_added(parent);
}
void iucv_accept_unlink(struct sock *sk)
static void iucv_accept_unlink(struct sock *sk)
{
unsigned long flags;
struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent);
......@@ -679,7 +539,8 @@ void iucv_accept_unlink(struct sock *sk)
sock_put(sk);
}
struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock)
static struct sock *iucv_accept_dequeue(struct sock *parent,
struct socket *newsock)
{
struct iucv_sock *isk, *n;
struct sock *sk;
......@@ -1100,7 +961,6 @@ static int iucv_sock_sendmsg(struct socket *sock, struct msghdr *msg,
/* initialize defaults */
cmsg_done = 0; /* check for duplicate headers */
txmsg.class = 0;
/* iterate over control messages */
for_each_cmsghdr(cmsg, msg) {
......@@ -1511,7 +1371,7 @@ static inline __poll_t iucv_accept_poll(struct sock *parent)
return 0;
}
__poll_t iucv_sock_poll(struct file *file, struct socket *sock,
static __poll_t iucv_sock_poll(struct file *file, struct socket *sock,
poll_table *wait)
{
struct sock *sk = sock->sk;
......@@ -1664,7 +1524,7 @@ static int iucv_sock_setsockopt(struct socket *sock, int level, int optname,
switch (sk->sk_state) {
case IUCV_OPEN:
case IUCV_BOUND:
if (val < 1 || val > (u16)(~0))
if (val < 1 || val > U16_MAX)
rc = -EINVAL;
else
iucv->msglimit = val;
......@@ -2396,6 +2256,35 @@ static const struct proto_ops iucv_sock_ops = {
.getsockopt = iucv_sock_getsockopt,
};
static int iucv_sock_create(struct net *net, struct socket *sock, int protocol,
int kern)
{
struct sock *sk;
if (protocol && protocol != PF_IUCV)
return -EPROTONOSUPPORT;
sock->state = SS_UNCONNECTED;
switch (sock->type) {
case SOCK_STREAM:
case SOCK_SEQPACKET:
/* currently, proto ops can handle both sk types */
sock->ops = &iucv_sock_ops;
break;
default:
return -ESOCKTNOSUPPORT;
}
sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL, kern);
if (!sk)
return -ENOMEM;
iucv_sock_init(sk, NULL);
return 0;
}
static const struct net_proto_family iucv_sock_family_ops = {
.family = AF_IUCV,
.owner = THIS_MODULE,
......@@ -2409,45 +2298,11 @@ static struct packet_type iucv_packet_type = {
static int afiucv_iucv_init(void)
{
int err;
err = pr_iucv->iucv_register(&af_iucv_handler, 0);
if (err)
goto out;
/* establish dummy device */
af_iucv_driver.bus = pr_iucv->bus;
err = driver_register(&af_iucv_driver);
if (err)
goto out_iucv;
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 = pr_iucv->bus;
af_iucv_dev->parent = pr_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_iucv_dev;
return 0;
out_iucv_dev:
put_device(af_iucv_dev);
out_driver:
driver_unregister(&af_iucv_driver);
out_iucv:
pr_iucv->iucv_unregister(&af_iucv_handler, 0);
out:
return err;
return pr_iucv->iucv_register(&af_iucv_handler, 0);
}
static void afiucv_iucv_exit(void)
{
device_unregister(af_iucv_dev);
driver_unregister(&af_iucv_driver);
pr_iucv->iucv_unregister(&af_iucv_handler, 0);
}
......
net/iucv/iucv.c
View file @ 85bac6a5
......@@ -67,32 +67,9 @@ static int iucv_bus_match(struct device *dev, struct device_driver *drv)
return 0;
}
enum iucv_pm_states {
IUCV_PM_INITIAL = 0,
IUCV_PM_FREEZING = 1,
IUCV_PM_THAWING = 2,
IUCV_PM_RESTORING = 3,
};
static enum iucv_pm_states iucv_pm_state;
static int iucv_pm_prepare(struct device *);
static void iucv_pm_complete(struct device *);
static int iucv_pm_freeze(struct device *);
static int iucv_pm_thaw(struct device *);
static int iucv_pm_restore(struct device *);
static const struct dev_pm_ops iucv_pm_ops = {
.prepare = iucv_pm_prepare,
.complete = iucv_pm_complete,
.freeze = iucv_pm_freeze,
.thaw = iucv_pm_thaw,
.restore = iucv_pm_restore,
};
struct bus_type iucv_bus = {
.name = "iucv",
.match = iucv_bus_match,
.pm = &iucv_pm_ops,
};
EXPORT_SYMBOL(iucv_bus);
......@@ -434,31 +411,6 @@ static void iucv_block_cpu(void *data)
cpumask_clear_cpu(cpu, &iucv_irq_cpumask);
}
/**
* iucv_block_cpu_almost
* @data: unused
*
* Allow connection-severed interrupts only on this cpu.
*/
static void iucv_block_cpu_almost(void *data)
{
int cpu = smp_processor_id();
union iucv_param *parm;
/* Allow iucv control interrupts only */
parm = iucv_param_irq[cpu];
memset(parm, 0, sizeof(union iucv_param));
parm->set_mask.ipmask = 0x08;
iucv_call_b2f0(IUCV_SETMASK, parm);
/* Allow iucv-severed interrupt only */
memset(parm, 0, sizeof(union iucv_param));
parm->set_mask.ipmask = 0x20;
iucv_call_b2f0(IUCV_SETCONTROLMASK, parm);
/* Clear indication that iucv interrupts are allowed for this cpu. */
cpumask_clear_cpu(cpu, &iucv_irq_cpumask);
}
/**
* iucv_declare_cpu
* @data: unused
......@@ -1834,146 +1786,6 @@ static void iucv_external_interrupt(struct ext_code ext_code,
spin_unlock(&iucv_queue_lock);
}
static int iucv_pm_prepare(struct device *dev)
{
int rc = 0;
#ifdef CONFIG_PM_DEBUG
printk(KERN_INFO "iucv_pm_prepare\n");
#endif
if (dev->driver && dev->driver->pm && dev->driver->pm->prepare)
rc = dev->driver->pm->prepare(dev);
return rc;
}
static void iucv_pm_complete(struct device *dev)
{
#ifdef CONFIG_PM_DEBUG
printk(KERN_INFO "iucv_pm_complete\n");
#endif
if (dev->driver && dev->driver->pm && dev->driver->pm->complete)
dev->driver->pm->complete(dev);
}
/**
* iucv_path_table_empty() - determine if iucv path table is empty
*
* Returns 0 if there are still iucv pathes defined
* 1 if there are no iucv pathes defined
*/
static int iucv_path_table_empty(void)
{
int i;
for (i = 0; i < iucv_max_pathid; i++) {
if (iucv_path_table[i])
return 0;
}
return 1;
}
/**
* iucv_pm_freeze() - Freeze PM callback
* @dev: iucv-based device
*
* disable iucv interrupts
* invoke callback function of the iucv-based driver
* shut down iucv, if no iucv-pathes are established anymore
*/
static int iucv_pm_freeze(struct device *dev)
{
int cpu;
struct iucv_irq_list *p, *n;
int rc = 0;
#ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "iucv_pm_freeze\n");
#endif
if (iucv_pm_state != IUCV_PM_FREEZING) {
for_each_cpu(cpu, &iucv_irq_cpumask)
smp_call_function_single(cpu, iucv_block_cpu_almost,
NULL, 1);
cancel_work_sync(&iucv_work);
list_for_each_entry_safe(p, n, &iucv_work_queue, list) {
list_del_init(&p->list);
iucv_sever_pathid(p->data.ippathid,
iucv_error_no_listener);
kfree(p);
}
}
iucv_pm_state = IUCV_PM_FREEZING;
if (dev->driver && dev->driver->pm && dev->driver->pm->freeze)
rc = dev->driver->pm->freeze(dev);
if (iucv_path_table_empty())
iucv_disable();
return rc;
}
/**
* iucv_pm_thaw() - Thaw PM callback
* @dev: iucv-based device
*
* make iucv ready for use again: allocate path table, declare interrupt buffers
* and enable iucv interrupts
* invoke callback function of the iucv-based driver
*/
static int iucv_pm_thaw(struct device *dev)
{
int rc = 0;
#ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "iucv_pm_thaw\n");
#endif
iucv_pm_state = IUCV_PM_THAWING;
if (!iucv_path_table) {
rc = iucv_enable();
if (rc)
goto out;
}
if (cpumask_empty(&iucv_irq_cpumask)) {
if (iucv_nonsmp_handler)
/* enable interrupts on one cpu */
iucv_allow_cpu(NULL);
else
/* enable interrupts on all cpus */
iucv_setmask_mp();
}
if (dev->driver && dev->driver->pm && dev->driver->pm->thaw)
rc = dev->driver->pm->thaw(dev);
out:
return rc;
}
/**
* iucv_pm_restore() - Restore PM callback
* @dev: iucv-based device
*
* make iucv ready for use again: allocate path table, declare interrupt buffers
* and enable iucv interrupts
* invoke callback function of the iucv-based driver
*/
static int iucv_pm_restore(struct device *dev)
{
int rc = 0;
#ifdef CONFIG_PM_DEBUG
printk(KERN_WARNING "iucv_pm_restore %p\n", iucv_path_table);
#endif
if ((iucv_pm_state != IUCV_PM_RESTORING) && iucv_path_table)
pr_warn("Suspending Linux did not completely close all IUCV connections\n");
iucv_pm_state = IUCV_PM_RESTORING;
if (cpumask_empty(&iucv_irq_cpumask)) {
rc = iucv_query_maxconn();
rc = iucv_enable();
if (rc)
goto out;
}
if (dev->driver && dev->driver->pm && dev->driver->pm->restore)
rc = dev->driver->pm->restore(dev);
out:
return rc;
}
struct iucv_interface iucv_if = {
.message_receive = iucv_message_receive,
.__message_receive = __iucv_message_receive,
......
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