Make possible for network in-kernel callers like io_uring to pass in a
custom ubuf_info by setting it in a new field of struct msghdr.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
unsigned int msg_flags; /* flags on received message */
__kernel_size_t msg_controllen; /* ancillary data buffer length */
struct kiocb *msg_iocb; /* ptr to iocb for async requests */
+ struct ubuf_info *msg_ubuf;
};
struct user_msghdr {
return -EMSGSIZE;
kmsg->msg_iocb = NULL;
+ kmsg->msg_ubuf = NULL;
*ptr = msg.msg_iov;
*len = msg.msg_iovlen;
return 0;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_namelen = 0;
+ msg.msg_ubuf = NULL;
if (addr) {
err = move_addr_to_kernel(addr, addr_len, &address);
if (err < 0)
return -EMSGSIZE;
kmsg->msg_iocb = NULL;
+ kmsg->msg_ubuf = NULL;
*uiov = msg.msg_iov;
*nsegs = msg.msg_iovlen;
return 0;