diff options
Diffstat (limited to 'include/linux/net.h')
| -rw-r--r-- | include/linux/net.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/net.h b/include/linux/net.h index f268f395ce47..3d82966e2243 100644 --- a/include/linux/net.h +++ b/include/linux/net.h @@ -47,6 +47,29 @@ typedef struct sockopt { int optlen; } sockopt_t; +/* + * Initialize a user-backed sockopt_t from the (optval, optlen) __user pair of + * a getsockopt() callback. Used by transitional __user getsockopt wrappers + * while the proto-layer callbacks are converted to take a sockopt_t; the + * caller writes opt->optlen back to the user optlen after the callback. + */ +static inline int sockopt_init_user(sockopt_t *opt, char __user *optval, + int __user *optlen) +{ + int len; + + if (get_user(len, optlen)) + return -EFAULT; + if (len < 0) + return -EINVAL; + + iov_iter_ubuf(&opt->iter_out, ITER_DEST, optval, len); + iov_iter_ubuf(&opt->iter_in, ITER_SOURCE, optval, len); + opt->optlen = len; + + return 0; +} + struct poll_table_struct; struct pipe_inode_info; struct inode; @@ -285,6 +308,7 @@ int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags); struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname); struct socket *sockfd_lookup(int fd, int *err); struct socket *sock_from_file(struct file *file); +int sock_read_xattr(struct socket *sock, const char *name, void *value, size_t size); #define sockfd_put(sock) fput(sock->file) int net_ratelimit(void); |