diff options
Diffstat (limited to 'include/linux/socket.h')
| -rw-r--r-- | include/linux/socket.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 4cc64d611cf4..04d2bc97f497 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -50,7 +50,17 @@ struct msghdr { void *msg_name; /* ptr to socket address structure */ int msg_namelen; /* size of socket address structure */ struct iov_iter msg_iter; /* data */ - void *msg_control; /* ancillary data */ + + /* + * Ancillary data. msg_control_user is the user buffer used for the + * recv* side when msg_control_is_user is set, msg_control is the kernel + * buffer used for all other cases. + */ + union { + void *msg_control; + void __user *msg_control_user; + }; + bool msg_control_is_user : 1; __kernel_size_t msg_controllen; /* ancillary data buffer length */ unsigned int msg_flags; /* flags on received message */ struct kiocb *msg_iocb; /* ptr to iocb for async requests */ |