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Diffstat (limited to 'net/core/sock.c')
-rw-r--r--net/core/sock.c168
1 files changed, 125 insertions, 43 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index 5440e67bcfe3..9370fd50aa2c 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -114,6 +114,9 @@
#include <linux/memcontrol.h>
#include <linux/prefetch.h>
#include <linux/compat.h>
+#include <linux/mroute.h>
+#include <linux/mroute6.h>
+#include <linux/icmpv6.h>
#include <linux/uaccess.h>
@@ -138,6 +141,7 @@
#include <net/tcp.h>
#include <net/busy_poll.h>
+#include <net/phonet/phonet.h>
#include <linux/ethtool.h>
@@ -1246,6 +1250,13 @@ set_sndbuf:
clear_bit(SOCK_PASSCRED, &sock->flags);
break;
+ case SO_PASSPIDFD:
+ if (valbool)
+ set_bit(SOCK_PASSPIDFD, &sock->flags);
+ else
+ clear_bit(SOCK_PASSPIDFD, &sock->flags);
+ break;
+
case SO_TIMESTAMP_OLD:
case SO_TIMESTAMP_NEW:
case SO_TIMESTAMPNS_OLD:
@@ -1362,12 +1373,6 @@ set_sndbuf:
__sock_set_mark(sk, val);
break;
case SO_RCVMARK:
- if (!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
- !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
- ret = -EPERM;
- break;
- }
-
sock_valbool_flag(sk, SOCK_RCVMARK, valbool);
break;
@@ -1732,6 +1737,10 @@ int sk_getsockopt(struct sock *sk, int level, int optname,
v.val = !!test_bit(SOCK_PASSCRED, &sock->flags);
break;
+ case SO_PASSPIDFD:
+ v.val = !!test_bit(SOCK_PASSPIDFD, &sock->flags);
+ break;
+
case SO_PEERCRED:
{
struct ucred peercred;
@@ -1747,6 +1756,39 @@ int sk_getsockopt(struct sock *sk, int level, int optname,
goto lenout;
}
+ case SO_PEERPIDFD:
+ {
+ struct pid *peer_pid;
+ struct file *pidfd_file = NULL;
+ int pidfd;
+
+ if (len > sizeof(pidfd))
+ len = sizeof(pidfd);
+
+ spin_lock(&sk->sk_peer_lock);
+ peer_pid = get_pid(sk->sk_peer_pid);
+ spin_unlock(&sk->sk_peer_lock);
+
+ if (!peer_pid)
+ return -ESRCH;
+
+ pidfd = pidfd_prepare(peer_pid, 0, &pidfd_file);
+ put_pid(peer_pid);
+ if (pidfd < 0)
+ return pidfd;
+
+ if (copy_to_sockptr(optval, &pidfd, len) ||
+ copy_to_sockptr(optlen, &len, sizeof(int))) {
+ put_unused_fd(pidfd);
+ fput(pidfd_file);
+
+ return -EFAULT;
+ }
+
+ fd_install(pidfd, pidfd_file);
+ return 0;
+ }
+
case SO_PEERGROUPS:
{
const struct cred *cred;
@@ -2381,7 +2423,6 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
{
u32 max_segs = 1;
- sk_dst_set(sk, dst);
sk->sk_route_caps = dst->dev->features;
if (sk_is_tcp(sk))
sk->sk_route_caps |= NETIF_F_GSO;
@@ -2400,6 +2441,7 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
}
}
sk->sk_gso_max_segs = max_segs;
+ sk_dst_set(sk, dst);
}
EXPORT_SYMBOL_GPL(sk_setup_caps);
@@ -2556,13 +2598,24 @@ kuid_t sock_i_uid(struct sock *sk)
}
EXPORT_SYMBOL(sock_i_uid);
-unsigned long sock_i_ino(struct sock *sk)
+unsigned long __sock_i_ino(struct sock *sk)
{
unsigned long ino;
- read_lock_bh(&sk->sk_callback_lock);
+ read_lock(&sk->sk_callback_lock);
ino = sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_ino : 0;
- read_unlock_bh(&sk->sk_callback_lock);
+ read_unlock(&sk->sk_callback_lock);
+ return ino;
+}
+EXPORT_SYMBOL(__sock_i_ino);
+
+unsigned long sock_i_ino(struct sock *sk)
+{
+ unsigned long ino;
+
+ local_bh_disable();
+ ino = __sock_i_ino(sk);
+ local_bh_enable();
return ino;
}
EXPORT_SYMBOL(sock_i_ino);
@@ -3219,36 +3272,6 @@ void __receive_sock(struct file *file)
}
}
-ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags)
-{
- ssize_t res;
- struct msghdr msg = {.msg_flags = flags};
- struct kvec iov;
- char *kaddr = kmap(page);
- iov.iov_base = kaddr + offset;
- iov.iov_len = size;
- res = kernel_sendmsg(sock, &msg, &iov, 1, size);
- kunmap(page);
- return res;
-}
-EXPORT_SYMBOL(sock_no_sendpage);
-
-ssize_t sock_no_sendpage_locked(struct sock *sk, struct page *page,
- int offset, size_t size, int flags)
-{
- ssize_t res;
- struct msghdr msg = {.msg_flags = flags};
- struct kvec iov;
- char *kaddr = kmap(page);
-
- iov.iov_base = kaddr + offset;
- iov.iov_len = size;
- res = kernel_sendmsg_locked(sk, &msg, &iov, 1, size);
- kunmap(page);
- return res;
-}
-EXPORT_SYMBOL(sock_no_sendpage_locked);
-
/*
* Default Socket Callbacks
*/
@@ -4004,7 +4027,7 @@ static void proto_seq_printf(struct seq_file *seq, struct proto *proto)
{
seq_printf(seq, "%-9s %4u %6d %6ld %-3s %6u %-3s %-10s "
- "%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
+ "%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
proto->name,
proto->obj_size,
sock_prot_inuse_get(seq_file_net(seq), proto),
@@ -4025,7 +4048,6 @@ static void proto_seq_printf(struct seq_file *seq, struct proto *proto)
proto_method_implemented(proto->getsockopt),
proto_method_implemented(proto->sendmsg),
proto_method_implemented(proto->recvmsg),
- proto_method_implemented(proto->sendpage),
proto_method_implemented(proto->bind),
proto_method_implemented(proto->backlog_rcv),
proto_method_implemented(proto->hash),
@@ -4046,7 +4068,7 @@ static int proto_seq_show(struct seq_file *seq, void *v)
"maxhdr",
"slab",
"module",
- "cl co di ac io in de sh ss gs se re sp bi br ha uh gp em\n");
+ "cl co di ac io in de sh ss gs se re bi br ha uh gp em\n");
else
proto_seq_printf(seq, list_entry(v, struct proto, node));
return 0;
@@ -4106,3 +4128,63 @@ int sock_bind_add(struct sock *sk, struct sockaddr *addr, int addr_len)
return sk->sk_prot->bind_add(sk, addr, addr_len);
}
EXPORT_SYMBOL(sock_bind_add);
+
+/* Copy 'size' bytes from userspace and return `size` back to userspace */
+int sock_ioctl_inout(struct sock *sk, unsigned int cmd,
+ void __user *arg, void *karg, size_t size)
+{
+ int ret;
+
+ if (copy_from_user(karg, arg, size))
+ return -EFAULT;
+
+ ret = READ_ONCE(sk->sk_prot)->ioctl(sk, cmd, karg);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(arg, karg, size))
+ return -EFAULT;
+
+ return 0;
+}
+EXPORT_SYMBOL(sock_ioctl_inout);
+
+/* This is the most common ioctl prep function, where the result (4 bytes) is
+ * copied back to userspace if the ioctl() returns successfully. No input is
+ * copied from userspace as input argument.
+ */
+static int sock_ioctl_out(struct sock *sk, unsigned int cmd, void __user *arg)
+{
+ int ret, karg = 0;
+
+ ret = READ_ONCE(sk->sk_prot)->ioctl(sk, cmd, &karg);
+ if (ret)
+ return ret;
+
+ return put_user(karg, (int __user *)arg);
+}
+
+/* A wrapper around sock ioctls, which copies the data from userspace
+ * (depending on the protocol/ioctl), and copies back the result to userspace.
+ * The main motivation for this function is to pass kernel memory to the
+ * protocol ioctl callbacks, instead of userspace memory.
+ */
+int sk_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
+{
+ int rc = 1;
+
+ if (sk->sk_type == SOCK_RAW && sk->sk_family == AF_INET)
+ rc = ipmr_sk_ioctl(sk, cmd, arg);
+ else if (sk->sk_type == SOCK_RAW && sk->sk_family == AF_INET6)
+ rc = ip6mr_sk_ioctl(sk, cmd, arg);
+ else if (sk_is_phonet(sk))
+ rc = phonet_sk_ioctl(sk, cmd, arg);
+
+ /* If ioctl was processed, returns its value */
+ if (rc <= 0)
+ return rc;
+
+ /* Otherwise call the default handler */
+ return sock_ioctl_out(sk, cmd, arg);
+}
+EXPORT_SYMBOL(sk_ioctl);
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-05 16:10:45 +0300