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| author | Björn Töpel <bjorn.topel@intel.com> | 2018-08-28 15:44:25 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-08-29 22:25:53 +0300 |
| commit | b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 (patch) | |
| tree | fe62f9152f04a26affb09ddb56fdd253f3502e82 /include | |
| parent | 7d2c6cfc5411207f1094e7ca5e63e711dc76d1ff (diff) | |
| download | linux-b0d1beeff2a97a0cf1965ea8f1d13b8973f22582.tar.xz | |
xdp: implement convert_to_xdp_frame for MEM_TYPE_ZERO_COPY
This commit adds proper MEM_TYPE_ZERO_COPY support for
convert_to_xdp_frame. Converting a MEM_TYPE_ZERO_COPY xdp_buff to an
xdp_frame is done by transforming the MEM_TYPE_ZERO_COPY buffer into a
MEM_TYPE_PAGE_ORDER0 frame. This is costly, and in the future it might
make sense to implement a more sophisticated thread-safe alloc/free
scheme for MEM_TYPE_ZERO_COPY, so that no allocation and copy is
required in the fast-path.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/xdp.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/net/xdp.h b/include/net/xdp.h index 76b95256c266..0d5c6fb4b2e2 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -91,6 +91,8 @@ static inline void xdp_scrub_frame(struct xdp_frame *frame) frame->dev_rx = NULL; } +struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp); + /* Convert xdp_buff to xdp_frame */ static inline struct xdp_frame *convert_to_xdp_frame(struct xdp_buff *xdp) @@ -99,9 +101,8 @@ struct xdp_frame *convert_to_xdp_frame(struct xdp_buff *xdp) int metasize; int headroom; - /* TODO: implement clone, copy, use "native" MEM_TYPE */ if (xdp->rxq->mem.type == MEM_TYPE_ZERO_COPY) - return NULL; + return xdp_convert_zc_to_xdp_frame(xdp); /* Assure headroom is available for storing info */ headroom = xdp->data - xdp->data_hard_start; |