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io_uring: ensure async punted sendmsg/recvmsg requests copy data

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Just like commit f67676d160 for read/write requests, this one ensures
that the msghdr data is fully copied if we need to punt a recvmsg or
sendmsg system call to async context.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2019-12-02 18:50:25 -07:00
parent f67676d160
commit 03b1230ca1
3 changed files with 166 additions and 74 deletions
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15
include/linux/socket.h
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@ -378,12 +378,19 @@ extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg,
extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
unsigned int vlen, unsigned int flags,
bool forbid_cmsg_compat);
extern long __sys_sendmsg_sock(struct socket *sock,
struct user_msghdr __user *msg,
extern long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg,
unsigned int flags);
extern long __sys_recvmsg_sock(struct socket *sock,
struct user_msghdr __user *msg,
extern long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg,
struct user_msghdr __user *umsg,
struct sockaddr __user *uaddr,
unsigned int flags);
extern int sendmsg_copy_msghdr(struct msghdr *msg,
struct user_msghdr __user *umsg, unsigned flags,
struct iovec **iov);
extern int recvmsg_copy_msghdr(struct msghdr *msg,
struct user_msghdr __user *umsg, unsigned flags,
struct sockaddr __user **uaddr,
struct iovec **iov);
/* helpers which do the actual work for syscalls */
extern int __sys_recvfrom(int fd, void __user *ubuf, size_t size,