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OpenWRT's developer guide prefers having actual patches so they an be sent upstream more easily. However, in this case, Adding proper fields also allows for `git am` to properly function. Some of these patches are quite old, and lack much traceable history. This commit tries to rectify that, by digging in the history to find where and how it was first added. It is by no means perfect and also shows some patches that should have been long gone. Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
102 lines
3.1 KiB
Diff
102 lines
3.1 KiB
Diff
From 2e88d4ff03013937028f5397268b21e10cf68713 Mon Sep 17 00:00:00 2001
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From: Lorenzo Bianconi <lorenzo@kernel.org>
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Date: Fri, 21 Jan 2022 11:09:45 +0100
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Subject: [PATCH] xdp: introduce flags field in xdp_buff/xdp_frame
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Introduce flags field in xdp_frame and xdp_buffer data structures
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to define additional buffer features. At the moment the only
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supported buffer feature is frags bit (XDP_FLAGS_HAS_FRAGS).
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frags bit is used to specify if this is a linear buffer
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(XDP_FLAGS_HAS_FRAGS not set) or a frags frame (XDP_FLAGS_HAS_FRAGS
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set). In the latter case the driver is expected to initialize the
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skb_shared_info structure at the end of the first buffer to link together
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subsequent buffers belonging to the same frame.
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Acked-by: Toke Hoiland-Jorgensen <toke@redhat.com>
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Acked-by: John Fastabend <john.fastabend@gmail.com>
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Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
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Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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Link: https://lore.kernel.org/r/e389f14f3a162c0a5bc6a2e1aa8dd01a90be117d.1642758637.git.lorenzo@kernel.org
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Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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---
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include/net/xdp.h | 29 +++++++++++++++++++++++++++++
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1 file changed, 29 insertions(+)
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diff --git a/include/net/xdp.h b/include/net/xdp.h
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index 8f0812e4996d..485e9495a690 100644
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--- a/include/net/xdp.h
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+++ b/include/net/xdp.h
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@@ -66,6 +66,10 @@ struct xdp_txq_info {
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struct net_device *dev;
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};
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+enum xdp_buff_flags {
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+ XDP_FLAGS_HAS_FRAGS = BIT(0), /* non-linear xdp buff */
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+};
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+
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struct xdp_buff {
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void *data;
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void *data_end;
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@@ -74,13 +78,30 @@ struct xdp_buff {
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struct xdp_rxq_info *rxq;
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struct xdp_txq_info *txq;
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u32 frame_sz; /* frame size to deduce data_hard_end/reserved tailroom*/
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+ u32 flags; /* supported values defined in xdp_buff_flags */
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};
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+static __always_inline bool xdp_buff_has_frags(struct xdp_buff *xdp)
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+{
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+ return !!(xdp->flags & XDP_FLAGS_HAS_FRAGS);
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+}
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+
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+static __always_inline void xdp_buff_set_frags_flag(struct xdp_buff *xdp)
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+{
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+ xdp->flags |= XDP_FLAGS_HAS_FRAGS;
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+}
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+
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+static __always_inline void xdp_buff_clear_frags_flag(struct xdp_buff *xdp)
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+{
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+ xdp->flags &= ~XDP_FLAGS_HAS_FRAGS;
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+}
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+
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static __always_inline void
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xdp_init_buff(struct xdp_buff *xdp, u32 frame_sz, struct xdp_rxq_info *rxq)
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{
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xdp->frame_sz = frame_sz;
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xdp->rxq = rxq;
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+ xdp->flags = 0;
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}
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static __always_inline void
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@@ -122,8 +143,14 @@ struct xdp_frame {
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*/
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struct xdp_mem_info mem;
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struct net_device *dev_rx; /* used by cpumap */
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+ u32 flags; /* supported values defined in xdp_buff_flags */
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};
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+static __always_inline bool xdp_frame_has_frags(struct xdp_frame *frame)
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+{
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+ return !!(frame->flags & XDP_FLAGS_HAS_FRAGS);
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+}
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+
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#define XDP_BULK_QUEUE_SIZE 16
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struct xdp_frame_bulk {
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int count;
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@@ -180,6 +207,7 @@ void xdp_convert_frame_to_buff(struct xd
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xdp->data_end = frame->data + frame->len;
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xdp->data_meta = frame->data - frame->metasize;
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xdp->frame_sz = frame->frame_sz;
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+ xdp->flags = frame->flags;
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}
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static inline
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@@ -206,6 +234,7 @@ int xdp_update_frame_from_buff(struct xd
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xdp_frame->headroom = headroom - sizeof(*xdp_frame);
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xdp_frame->metasize = metasize;
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xdp_frame->frame_sz = xdp->frame_sz;
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+ xdp_frame->flags = xdp->flags;
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return 0;
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}
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