diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/net.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/net.h b/include/linux/net.h index ca6a7bc5c9ae..f268f395ce47 100644 --- a/include/linux/net.h +++ b/include/linux/net.h @@ -23,9 +23,30 @@ #include <linux/fs.h> #include <linux/mm.h> #include <linux/sockptr.h> +#include <linux/uio.h> #include <uapi/linux/net.h> +/** + * struct sockopt - socket option value container + * @iter_in: iov_iter for reading optval with the content from the caller. + * Use copy_from_iter() given this iov direction is ITER_SOURCE + * @iter_out: iov_iter for protocols to update optval data to userspace + * Use _copy_to_iter() given iov direction is ITER_DEST + * @optlen: serves as both input (buffer size) and output (returned data size). + * + * Type-safe wrapper for socket option data that works with both + * user and kernel buffers. + * + * The optlen field allows callbacks to return a specific length value + * independent of the bytes written via copy_to_iter(). + */ +typedef struct sockopt { + struct iov_iter iter_in; + struct iov_iter iter_out; + int optlen; +} sockopt_t; + struct poll_table_struct; struct pipe_inode_info; struct inode; @@ -192,6 +213,8 @@ struct proto_ops { unsigned int optlen); int (*getsockopt)(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen); + int (*getsockopt_iter)(struct socket *sock, int level, + int optname, sockopt_t *opt); void (*show_fdinfo)(struct seq_file *m, struct socket *sock); int (*sendmsg) (struct socket *sock, struct msghdr *m, size_t total_len); |