diff options
| author |   Maciej Żenczykowski <maze@google.com> | 2020-08-18 18:07:10 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-08-19 14:02:49 -0700 |
| commit | 596b5ef458f903d4362fb3c69967b6d8a23334bd (patch) | |
| tree | fd3ad5165cdb78b0e52481b349157d08930d1d27 /include/linux/if_tun.h | |
| parent | net-tun: Add type safety to tun_xdp_to_ptr() and tun_ptr_to_xdp() (diff) | |
| download | wireguard-linux-596b5ef458f903d4362fb3c69967b6d8a23334bd.tar.xz wireguard-linux-596b5ef458f903d4362fb3c69967b6d8a23334bd.zip | |
net-tun: Eliminate two tun/xdp related function calls from vhost-net
This provides a minor performance boost by virtue of inlining
instead of cross module function calls.
Test: builds
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200819010710.3959310-2-zenczykowski@gmail.com
Diffstat (limited to 'include/linux/if_tun.h')
| -rw-r--r-- | include/linux/if_tun.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/include/linux/if_tun.h b/include/linux/if_tun.h index 6c37e1dbc5df..2a7660843444 100644 --- a/include/linux/if_tun.h +++ b/include/linux/if_tun.h @@ -27,9 +27,18 @@ struct tun_xdp_hdr { #if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE) struct socket *tun_get_socket(struct file *); struct ptr_ring *tun_get_tx_ring(struct file *file); -bool tun_is_xdp_frame(void *ptr); -void *tun_xdp_to_ptr(struct xdp_frame *xdp); -struct xdp_frame *tun_ptr_to_xdp(void *ptr); +static inline bool tun_is_xdp_frame(void *ptr) +{ + return (unsigned long)ptr & TUN_XDP_FLAG; +} +static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp) +{ + return (void *)((unsigned long)xdp | TUN_XDP_FLAG); +} +static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr) +{ + return (void *)((unsigned long)ptr & ~TUN_XDP_FLAG); +} void tun_ptr_free(void *ptr); #else #include <linux/err.h> |