forked from Minki/linux
sock_diag: Move the sock_ code to net/core/
This patch moves the sock_ code from inet_diag.c to generic sock_diag.c file and provides necessary request_module-s calls and a pointer on inet_diag_compat dumping routine. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov
David S. Miller
parent
a029fe26b6
commit
8ef874bfc7
@ -8,7 +8,8 @@ obj-y := sock.o request_sock.o skbuff.o iovec.o datagram.o stream.o scm.o \
|
||||
obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
|
||||
|
||||
obj-y += dev.o ethtool.o dev_addr_lists.o dst.o netevent.o \
|
||||
neighbour.o rtnetlink.o utils.o link_watch.o filter.o
|
||||
neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
|
||||
sock_diag.o
|
||||
|
||||
obj-$(CONFIG_XFRM) += flow.o
|
||||
obj-y += net-sysfs.o
|
||||
|
||||
150
net/core/sock_diag.c
Normal file
150
net/core/sock_diag.c
Normal file
@ -0,0 +1,150 @@
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/socket.h>
|
||||
#include <linux/skbuff.h>
|
||||
#include <net/netlink.h>
|
||||
#include <net/net_namespace.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
#include <linux/inet_diag.h>
|
||||
#include <linux/sock_diag.h>
|
||||
|
||||
static struct sock_diag_handler *sock_diag_handlers[AF_MAX];
|
||||
static int (*inet_rcv_compat)(struct sk_buff *skb, struct nlmsghdr *nlh);
|
||||
static DEFINE_MUTEX(sock_diag_table_mutex);
|
||||
|
||||
void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh))
|
||||
{
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
inet_rcv_compat = fn;
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(sock_diag_register_inet_compat);
|
||||
|
||||
void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh))
|
||||
{
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
inet_rcv_compat = NULL;
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(sock_diag_unregister_inet_compat);
|
||||
|
||||
int sock_diag_register(struct sock_diag_handler *hndl)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
if (hndl->family > AF_MAX)
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
if (sock_diag_handlers[hndl->family])
|
||||
err = -EBUSY;
|
||||
else
|
||||
sock_diag_handlers[hndl->family] = hndl;
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(sock_diag_register);
|
||||
|
||||
void sock_diag_unregister(struct sock_diag_handler *hnld)
|
||||
{
|
||||
int family = hnld->family;
|
||||
|
||||
if (family > AF_MAX)
|
||||
return;
|
||||
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
BUG_ON(sock_diag_handlers[family] != hnld);
|
||||
sock_diag_handlers[family] = NULL;
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(sock_diag_unregister);
|
||||
|
||||
static inline struct sock_diag_handler *sock_diag_lock_handler(int family)
|
||||
{
|
||||
if (sock_diag_handlers[family] == NULL)
|
||||
request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
|
||||
NETLINK_SOCK_DIAG, IPPROTO_IP);
|
||||
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
return sock_diag_handlers[family];
|
||||
}
|
||||
|
||||
static inline void sock_diag_unlock_handler(struct sock_diag_handler *h)
|
||||
{
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
}
|
||||
|
||||
static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
|
||||
{
|
||||
int err;
|
||||
struct sock_diag_req *req = NLMSG_DATA(nlh);
|
||||
struct sock_diag_handler *hndl;
|
||||
|
||||
if (nlmsg_len(nlh) < sizeof(*req))
|
||||
return -EINVAL;
|
||||
|
||||
hndl = sock_diag_lock_handler(req->sdiag_family);
|
||||
if (hndl == NULL)
|
||||
err = -ENOENT;
|
||||
else
|
||||
err = hndl->dump(skb, nlh);
|
||||
sock_diag_unlock_handler(hndl);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
|
||||
{
|
||||
int ret;
|
||||
|
||||
switch (nlh->nlmsg_type) {
|
||||
case TCPDIAG_GETSOCK:
|
||||
case DCCPDIAG_GETSOCK:
|
||||
if (inet_rcv_compat == NULL)
|
||||
request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
|
||||
NETLINK_SOCK_DIAG, IPPROTO_IP);
|
||||
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
if (inet_rcv_compat != NULL)
|
||||
ret = inet_rcv_compat(skb, nlh);
|
||||
else
|
||||
ret = -EOPNOTSUPP;
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
|
||||
return ret;
|
||||
case SOCK_DIAG_BY_FAMILY:
|
||||
return __sock_diag_rcv_msg(skb, nlh);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static DEFINE_MUTEX(sock_diag_mutex);
|
||||
|
||||
static void sock_diag_rcv(struct sk_buff *skb)
|
||||
{
|
||||
mutex_lock(&sock_diag_mutex);
|
||||
netlink_rcv_skb(skb, &sock_diag_rcv_msg);
|
||||
mutex_unlock(&sock_diag_mutex);
|
||||
}
|
||||
|
||||
struct sock *sock_diag_nlsk;
|
||||
EXPORT_SYMBOL_GPL(sock_diag_nlsk);
|
||||
|
||||
static int __init sock_diag_init(void)
|
||||
{
|
||||
sock_diag_nlsk = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG, 0,
|
||||
sock_diag_rcv, NULL, THIS_MODULE);
|
||||
return sock_diag_nlsk == NULL ? -ENOMEM : 0;
|
||||
}
|
||||
|
||||
static void __exit sock_diag_exit(void)
|
||||
{
|
||||
netlink_kernel_release(sock_diag_nlsk);
|
||||
}
|
||||
|
||||
module_init(sock_diag_init);
|
||||
module_exit(sock_diag_exit);
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_SOCK_DIAG);
|
||||
@ -46,8 +46,6 @@ struct inet_diag_entry {
|
||||
u16 userlocks;
|
||||
};
|
||||
|
||||
static struct sock *sdiagnl;
|
||||
|
||||
#define INET_DIAG_PUT(skb, attrtype, attrlen) \
|
||||
RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
|
||||
|
||||
@ -314,7 +312,7 @@ static int inet_diag_get_exact(struct sk_buff *in_skb,
|
||||
kfree_skb(rep);
|
||||
goto out;
|
||||
}
|
||||
err = netlink_unicast(sdiagnl, rep, NETLINK_CB(in_skb).pid,
|
||||
err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid,
|
||||
MSG_DONTWAIT);
|
||||
if (err > 0)
|
||||
err = 0;
|
||||
@ -931,7 +929,7 @@ static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return netlink_dump_start(sdiagnl, skb, nlh,
|
||||
return netlink_dump_start(sock_diag_nlsk, skb, nlh,
|
||||
inet_diag_dump_compat, NULL, 0);
|
||||
}
|
||||
|
||||
@ -956,7 +954,7 @@ static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return netlink_dump_start(sdiagnl, skb, h,
|
||||
return netlink_dump_start(sock_diag_nlsk, skb, h,
|
||||
inet_diag_dump, NULL, 0);
|
||||
}
|
||||
|
||||
@ -973,91 +971,6 @@ static struct sock_diag_handler inet6_diag_handler = {
|
||||
.dump = inet_diag_handler_dump,
|
||||
};
|
||||
|
||||
static struct sock_diag_handler *sock_diag_handlers[AF_MAX];
|
||||
static DEFINE_MUTEX(sock_diag_table_mutex);
|
||||
|
||||
int sock_diag_register(struct sock_diag_handler *hndl)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
if (hndl->family > AF_MAX)
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
if (sock_diag_handlers[hndl->family])
|
||||
err = -EBUSY;
|
||||
else
|
||||
sock_diag_handlers[hndl->family] = hndl;
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
void sock_diag_unregister(struct sock_diag_handler *hnld)
|
||||
{
|
||||
int family = hnld->family;
|
||||
|
||||
if (family > AF_MAX)
|
||||
return;
|
||||
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
BUG_ON(sock_diag_handlers[family] != hnld);
|
||||
sock_diag_handlers[family] = NULL;
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
}
|
||||
|
||||
static inline struct sock_diag_handler *sock_diag_lock_handler(int family)
|
||||
{
|
||||
mutex_lock(&sock_diag_table_mutex);
|
||||
return sock_diag_handlers[family];
|
||||
}
|
||||
|
||||
static inline void sock_diag_unlock_handler(struct sock_diag_handler *h)
|
||||
{
|
||||
mutex_unlock(&sock_diag_table_mutex);
|
||||
}
|
||||
|
||||
static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
|
||||
{
|
||||
int err;
|
||||
struct sock_diag_req *req = NLMSG_DATA(nlh);
|
||||
struct sock_diag_handler *hndl;
|
||||
|
||||
if (nlmsg_len(nlh) < sizeof(*req))
|
||||
return -EINVAL;
|
||||
|
||||
hndl = sock_diag_lock_handler(req->sdiag_family);
|
||||
if (hndl == NULL)
|
||||
err = -ENOENT;
|
||||
else
|
||||
err = hndl->dump(skb, nlh);
|
||||
sock_diag_unlock_handler(hndl);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
|
||||
{
|
||||
switch (nlh->nlmsg_type) {
|
||||
case TCPDIAG_GETSOCK:
|
||||
case DCCPDIAG_GETSOCK:
|
||||
return inet_diag_rcv_msg_compat(skb, nlh);
|
||||
case SOCK_DIAG_BY_FAMILY:
|
||||
return __sock_diag_rcv_msg(skb, nlh);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static DEFINE_MUTEX(sock_diag_mutex);
|
||||
|
||||
static void sock_diag_rcv(struct sk_buff *skb)
|
||||
{
|
||||
mutex_lock(&sock_diag_mutex);
|
||||
netlink_rcv_skb(skb, &sock_diag_rcv_msg);
|
||||
mutex_unlock(&sock_diag_mutex);
|
||||
}
|
||||
|
||||
int inet_diag_register(const struct inet_diag_handler *h)
|
||||
{
|
||||
const __u16 type = h->idiag_type;
|
||||
@ -1101,11 +1014,6 @@ static int __init inet_diag_init(void)
|
||||
if (!inet_diag_table)
|
||||
goto out;
|
||||
|
||||
sdiagnl = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG, 0,
|
||||
sock_diag_rcv, NULL, THIS_MODULE);
|
||||
if (sdiagnl == NULL)
|
||||
goto out_free_table;
|
||||
|
||||
err = sock_diag_register(&inet_diag_handler);
|
||||
if (err)
|
||||
goto out_free_nl;
|
||||
@ -1114,14 +1022,13 @@ static int __init inet_diag_init(void)
|
||||
if (err)
|
||||
goto out_free_inet;
|
||||
|
||||
sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
|
||||
out:
|
||||
return err;
|
||||
|
||||
out_free_inet:
|
||||
sock_diag_unregister(&inet_diag_handler);
|
||||
out_free_nl:
|
||||
netlink_kernel_release(sdiagnl);
|
||||
out_free_table:
|
||||
kfree(inet_diag_table);
|
||||
goto out;
|
||||
}
|
||||
@ -1130,11 +1037,11 @@ static void __exit inet_diag_exit(void)
|
||||
{
|
||||
sock_diag_unregister(&inet6_diag_handler);
|
||||
sock_diag_unregister(&inet_diag_handler);
|
||||
netlink_kernel_release(sdiagnl);
|
||||
sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
|
||||
kfree(inet_diag_table);
|
||||
}
|
||||
|
||||
module_init(inet_diag_init);
|
||||
module_exit(inet_diag_exit);
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_SOCK_DIAG);
|
||||
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 0);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user