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net: remove cmsg restriction from io_uring based send/recvmsg calls 

No need to restrict these anymore, as the worker threads are direct
clones of the original task. Hence we know for a fact that we can
support anything that the regular task can.

Since the only user of proto_ops->flags was to flag PROTO_CMSG_DATA_ONLY,
kill the member and the flag definition too.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-02-17 10:14:21 -07:00
parent 2587890b5e
commit e54937963f
4 changed files with 0 additions and 15 deletions
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3
include/linux/net.h
View File

@ -42,8 +42,6 @@ struct net;
#define SOCK_PASSCRED 3
#define SOCK_PASSSEC 4
#define PROTO_CMSG_DATA_ONLY 0x0001
#ifndef ARCH_HAS_SOCKET_TYPES
/**
* enum sock_type - Socket types
@ -138,7 +136,6 @@ typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
struct proto_ops {
int family;
unsigned int flags;
struct module *owner;
int (*release) (struct socket *sock);
int (*bind) (struct socket *sock,

1
net/ipv4/af_inet.c
View File

@ -1021,7 +1021,6 @@ static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned lon
const struct proto_ops inet_stream_ops = {
.family = PF_INET,
.flags = PROTO_CMSG_DATA_ONLY,
.owner = THIS_MODULE,
.release = inet_release,
.bind = inet_bind,

1
net/ipv6/af_inet6.c
View File

@ -665,7 +665,6 @@ int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
const struct proto_ops inet6_stream_ops = {
.family = PF_INET6,
.flags = PROTO_CMSG_DATA_ONLY,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,

10
net/socket.c
View File

@ -2411,10 +2411,6 @@ static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg,
unsigned int flags)
{
/* disallow ancillary data requests from this path */
if (msg->msg_control || msg->msg_controllen)
return -EINVAL;
return ____sys_sendmsg(sock, msg, flags, NULL, 0);
}
@ -2623,12 +2619,6 @@ long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg,
struct user_msghdr __user *umsg,
struct sockaddr __user *uaddr, unsigned int flags)
{
if (msg->msg_control || msg->msg_controllen) {
/* disallow ancillary data reqs unless cmsg is plain data */
if (!(sock->ops->flags & PROTO_CMSG_DATA_ONLY))
return -EINVAL;
}
return ____sys_recvmsg(sock, msg, umsg, uaddr, flags, 0);
}