[PATCH bpf-next v3 10/11] mlx5: Support RX XDP metadata

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From: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>

Support RX hash and timestamp metadata kfuncs. We need to pass in the cqe
pointer to the mlx5e_skb_from* functions so it can be retrieved from the
XDP ctx to do this.

Cc: Saeed Mahameed <saeedm@xxxxxxxxxx>
Cc: John Fastabend <john.fastabend@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Martin KaFai Lau <martin.lau@xxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Willem de Bruijn <willemb@xxxxxxxxxx>
Cc: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Cc: Anatoly Burakov <anatoly.burakov@xxxxxxxxx>
Cc: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
Cc: Magnus Karlsson <magnus.karlsson@xxxxxxxxx>
Cc: Maryam Tahhan <mtahhan@xxxxxxxxxx>
Cc: xdp-hints@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
---
 drivers/net/ethernet/mellanox/mlx5/core/en.h  | 10 ++++-
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  | 29 +++++++++++++
 .../net/ethernet/mellanox/mlx5/core/en/xdp.h  |  7 ++++
 .../ethernet/mellanox/mlx5/core/en/xsk/rx.c   | 10 +++++
 .../ethernet/mellanox/mlx5/core/en/xsk/rx.h   |  2 +
 .../net/ethernet/mellanox/mlx5/core/en_main.c |  4 ++
 .../net/ethernet/mellanox/mlx5/core/en_rx.c   | 42 ++++++++++---------
 7 files changed, 82 insertions(+), 22 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index cdbaac5f6d25..8337ff0cacd5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -627,10 +627,11 @@ struct mlx5e_rq;
 typedef void (*mlx5e_fp_handle_rx_cqe)(struct mlx5e_rq*, struct mlx5_cqe64*);
 typedef struct sk_buff *
 (*mlx5e_fp_skb_from_cqe_mpwrq)(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
-			       u16 cqe_bcnt, u32 head_offset, u32 page_idx);
+			       struct mlx5_cqe64 *cqe, u16 cqe_bcnt,
+			       u32 head_offset, u32 page_idx);
 typedef struct sk_buff *
 (*mlx5e_fp_skb_from_cqe)(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi,
-			 u32 cqe_bcnt);
+			 struct mlx5_cqe64 *cqe, u32 cqe_bcnt);
 typedef bool (*mlx5e_fp_post_rx_wqes)(struct mlx5e_rq *rq);
 typedef void (*mlx5e_fp_dealloc_wqe)(struct mlx5e_rq*, u16);
 typedef void (*mlx5e_fp_shampo_dealloc_hd)(struct mlx5e_rq*, u16, u16, bool);
@@ -1036,6 +1037,11 @@ int mlx5e_vlan_rx_kill_vid(struct net_device *dev, __always_unused __be16 proto,
 			   u16 vid);
 void mlx5e_timestamp_init(struct mlx5e_priv *priv);
 
+static inline bool mlx5e_rx_hw_stamp(struct hwtstamp_config *config)
+{
+	return config->rx_filter == HWTSTAMP_FILTER_ALL;
+}
+
 struct mlx5e_xsk_param;
 
 struct mlx5e_rq_param;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index db49b813bcb5..2a4700b3695a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -156,6 +156,35 @@ mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq,
 	return true;
 }
 
+bool mlx5e_xdp_rx_timestamp_supported(const struct xdp_md *ctx)
+{
+	const struct mlx5_xdp_buff *_ctx = (void *)ctx;
+
+	return mlx5e_rx_hw_stamp(_ctx->rq->tstamp);
+}
+
+u64 mlx5e_xdp_rx_timestamp(const struct xdp_md *ctx)
+{
+	const struct mlx5_xdp_buff *_ctx = (void *)ctx;
+
+	return mlx5e_cqe_ts_to_ns(_ctx->rq->ptp_cyc2time,
+				  _ctx->rq->clock, get_cqe_ts(_ctx->cqe));
+}
+
+bool mlx5e_xdp_rx_hash_supported(const struct xdp_md *ctx)
+{
+	const struct mlx5_xdp_buff *_ctx = (void *)ctx;
+
+	return _ctx->xdp.rxq->dev->features & NETIF_F_RXHASH;
+}
+
+u32 mlx5e_xdp_rx_hash(const struct xdp_md *ctx)
+{
+	const struct mlx5_xdp_buff *_ctx = (void *)ctx;
+
+	return be32_to_cpu(_ctx->cqe->rss_hash_result);
+}
+
 /* returns true if packet was consumed by xdp */
 bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct page *page,
 		      struct bpf_prog *prog, struct mlx5_xdp_buff *mxbuf)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
index a33b448d542d..a5fc30b07617 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
@@ -46,6 +46,8 @@
 
 struct mlx5_xdp_buff {
 	struct xdp_buff xdp;
+	struct mlx5_cqe64 *cqe;
+	struct mlx5e_rq *rq;
 };
 
 struct mlx5e_xsk_param;
@@ -60,6 +62,11 @@ void mlx5e_xdp_rx_poll_complete(struct mlx5e_rq *rq);
 int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
 		   u32 flags);
 
+bool mlx5e_xdp_rx_hash_supported(const struct xdp_md *ctx);
+u32 mlx5e_xdp_rx_hash(const struct xdp_md *ctx);
+bool mlx5e_xdp_rx_timestamp_supported(const struct xdp_md *ctx);
+u64 mlx5e_xdp_rx_timestamp(const struct xdp_md *ctx);
+
 INDIRECT_CALLABLE_DECLARE(bool mlx5e_xmit_xdp_frame_mpwqe(struct mlx5e_xdpsq *sq,
 							  struct mlx5e_xmit_data *xdptxd,
 							  struct skb_shared_info *sinfo,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c
index 5e88dc61824e..05cf7987585a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c
@@ -49,6 +49,7 @@ int mlx5e_xsk_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 			umr_wqe->inline_mtts[i] = (struct mlx5_mtt) {
 				.ptag = cpu_to_be64(addr | MLX5_EN_WR),
 			};
+			wi->alloc_units[i].mxbuf->rq = rq;
 		}
 	} else if (unlikely(rq->mpwqe.umr_mode == MLX5E_MPWRQ_UMR_MODE_UNALIGNED)) {
 		for (i = 0; i < batch; i++) {
@@ -58,6 +59,7 @@ int mlx5e_xsk_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 				.key = rq->mkey_be,
 				.va = cpu_to_be64(addr),
 			};
+			wi->alloc_units[i].mxbuf->rq = rq;
 		}
 	} else if (likely(rq->mpwqe.umr_mode == MLX5E_MPWRQ_UMR_MODE_TRIPLE)) {
 		u32 mapping_size = 1 << (rq->mpwqe.page_shift - 2);
@@ -81,6 +83,7 @@ int mlx5e_xsk_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 				.key = rq->mkey_be,
 				.va = cpu_to_be64(rq->wqe_overflow.addr),
 			};
+			wi->alloc_units[i].mxbuf->rq = rq;
 		}
 	} else {
 		__be32 pad_size = cpu_to_be32((1 << rq->mpwqe.page_shift) -
@@ -100,6 +103,7 @@ int mlx5e_xsk_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 				.va = cpu_to_be64(rq->wqe_overflow.addr),
 				.bcount = pad_size,
 			};
+			wi->alloc_units[i].mxbuf->rq = rq;
 		}
 	}
 
@@ -230,6 +234,7 @@ static struct sk_buff *mlx5e_xsk_construct_skb(struct mlx5e_rq *rq, struct xdp_b
 
 struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 						    struct mlx5e_mpw_info *wi,
+						    struct mlx5_cqe64 *cqe,
 						    u16 cqe_bcnt,
 						    u32 head_offset,
 						    u32 page_idx)
@@ -250,6 +255,8 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 	 */
 	WARN_ON_ONCE(head_offset);
 
+	/* mxbuf->rq is set on allocation, but cqe is per-packet so set it here */
+	mxbuf->cqe = cqe;
 	xsk_buff_set_size(&mxbuf->xdp, cqe_bcnt);
 	xsk_buff_dma_sync_for_cpu(&mxbuf->xdp, rq->xsk_pool);
 	net_prefetch(mxbuf->xdp.data);
@@ -284,6 +291,7 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 
 struct sk_buff *mlx5e_xsk_skb_from_cqe_linear(struct mlx5e_rq *rq,
 					      struct mlx5e_wqe_frag_info *wi,
+					      struct mlx5_cqe64 *cqe,
 					      u32 cqe_bcnt)
 {
 	struct mlx5_xdp_buff *mxbuf = wi->au->mxbuf;
@@ -296,6 +304,8 @@ struct sk_buff *mlx5e_xsk_skb_from_cqe_linear(struct mlx5e_rq *rq,
 	 */
 	WARN_ON_ONCE(wi->offset);
 
+	/* mxbuf->rq is set on allocation, but cqe is per-packet so set it here */
+	mxbuf->cqe = cqe;
 	xsk_buff_set_size(&mxbuf->xdp, cqe_bcnt);
 	xsk_buff_dma_sync_for_cpu(&mxbuf->xdp, rq->xsk_pool);
 	net_prefetch(mxbuf->xdp.data);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.h b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.h
index 087c943bd8e9..cefc0ef6105d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.h
@@ -13,11 +13,13 @@ int mlx5e_xsk_alloc_rx_wqes_batched(struct mlx5e_rq *rq, u16 ix, int wqe_bulk);
 int mlx5e_xsk_alloc_rx_wqes(struct mlx5e_rq *rq, u16 ix, int wqe_bulk);
 struct sk_buff *mlx5e_xsk_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq,
 						    struct mlx5e_mpw_info *wi,
+						    struct mlx5_cqe64 *cqe,
 						    u16 cqe_bcnt,
 						    u32 head_offset,
 						    u32 page_idx);
 struct sk_buff *mlx5e_xsk_skb_from_cqe_linear(struct mlx5e_rq *rq,
 					      struct mlx5e_wqe_frag_info *wi,
+					      struct mlx5_cqe64 *cqe,
 					      u32 cqe_bcnt);
 
 #endif /* __MLX5_EN_XSK_RX_H__ */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 14bd86e368d5..015bfe891458 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -4890,6 +4890,10 @@ const struct net_device_ops mlx5e_netdev_ops = {
 	.ndo_tx_timeout          = mlx5e_tx_timeout,
 	.ndo_bpf		 = mlx5e_xdp,
 	.ndo_xdp_xmit            = mlx5e_xdp_xmit,
+	.ndo_xdp_rx_timestamp_supported = mlx5e_xdp_rx_timestamp_supported,
+	.ndo_xdp_rx_timestamp    = mlx5e_xdp_rx_timestamp,
+	.ndo_xdp_rx_hash_supported = mlx5e_xdp_rx_hash_supported,
+	.ndo_xdp_rx_hash         = mlx5e_xdp_rx_hash,
 	.ndo_xsk_wakeup          = mlx5e_xsk_wakeup,
 #ifdef CONFIG_MLX5_EN_ARFS
 	.ndo_rx_flow_steer	 = mlx5e_rx_flow_steer,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 434025703e50..a85f82efbc4f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -62,10 +62,12 @@
 
 static struct sk_buff *
 mlx5e_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
-				u16 cqe_bcnt, u32 head_offset, u32 page_idx);
+				struct mlx5_cqe64 *cqe, u16 cqe_bcnt, u32 head_offset,
+				u32 page_idx);
 static struct sk_buff *
 mlx5e_skb_from_cqe_mpwrq_nonlinear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
-				   u16 cqe_bcnt, u32 head_offset, u32 page_idx);
+				   struct mlx5_cqe64 *cqe, u16 cqe_bcnt, u32 head_offset,
+				   u32 page_idx);
 static void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
 static void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
 static void mlx5e_handle_rx_cqe_mpwrq_shampo(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
@@ -76,11 +78,6 @@ const struct mlx5e_rx_handlers mlx5e_rx_handlers_nic = {
 	.handle_rx_cqe_mpwqe_shampo = mlx5e_handle_rx_cqe_mpwrq_shampo,
 };
 
-static inline bool mlx5e_rx_hw_stamp(struct hwtstamp_config *config)
-{
-	return config->rx_filter == HWTSTAMP_FILTER_ALL;
-}
-
 static inline void mlx5e_read_cqe_slot(struct mlx5_cqwq *wq,
 				       u32 cqcc, void *data)
 {
@@ -1564,16 +1561,18 @@ struct sk_buff *mlx5e_build_linear_skb(struct mlx5e_rq *rq, void *va,
 	return skb;
 }
 
-static void mlx5e_fill_xdp_buff(struct mlx5e_rq *rq, void *va, u16 headroom,
+static void mlx5e_fill_xdp_buff(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe, void *va, u16 headroom,
 				u32 len, struct mlx5_xdp_buff *mxbuf)
 {
 	xdp_init_buff(&mxbuf->xdp, rq->buff.frame0_sz, &rq->xdp_rxq);
 	xdp_prepare_buff(&mxbuf->xdp, va, headroom, len, true);
+	mxbuf->cqe = cqe;
+	mxbuf->rq = rq;
 }
 
 static struct sk_buff *
 mlx5e_skb_from_cqe_linear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi,
-			  u32 cqe_bcnt)
+			  struct mlx5_cqe64 *cqe, u32 cqe_bcnt)
 {
 	union mlx5e_alloc_unit *au = wi->au;
 	u16 rx_headroom = rq->buff.headroom;
@@ -1598,7 +1597,7 @@ mlx5e_skb_from_cqe_linear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi,
 		struct mlx5_xdp_buff mxbuf;
 
 		net_prefetchw(va); /* xdp_frame data area */
-		mlx5e_fill_xdp_buff(rq, va, rx_headroom, cqe_bcnt, &mxbuf);
+		mlx5e_fill_xdp_buff(rq, cqe, va, rx_headroom, cqe_bcnt, &mxbuf);
 		if (mlx5e_xdp_handle(rq, au->page, prog, &mxbuf))
 			return NULL; /* page/packet was consumed by XDP */
 
@@ -1619,7 +1618,7 @@ mlx5e_skb_from_cqe_linear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi,
 
 static struct sk_buff *
 mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi,
-			     u32 cqe_bcnt)
+			     struct mlx5_cqe64 *cqe, u32 cqe_bcnt)
 {
 	struct mlx5e_rq_frag_info *frag_info = &rq->wqe.info.arr[0];
 	struct mlx5e_wqe_frag_info *head_wi = wi;
@@ -1643,7 +1642,7 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5e_wqe_frag_info *wi
 	net_prefetchw(va); /* xdp_frame data area */
 	net_prefetch(va + rx_headroom);
 
-	mlx5e_fill_xdp_buff(rq, va, rx_headroom, frag_consumed_bytes, &mxbuf);
+	mlx5e_fill_xdp_buff(rq, cqe, va, rx_headroom, frag_consumed_bytes, &mxbuf);
 	sinfo = xdp_get_shared_info_from_buff(&mxbuf.xdp);
 	truesize = 0;
 
@@ -1766,7 +1765,7 @@ static void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
 			      mlx5e_skb_from_cqe_linear,
 			      mlx5e_skb_from_cqe_nonlinear,
 			      mlx5e_xsk_skb_from_cqe_linear,
-			      rq, wi, cqe_bcnt);
+			      rq, wi, cqe, cqe_bcnt);
 	if (!skb) {
 		/* probably for XDP */
 		if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
@@ -1929,7 +1928,8 @@ mlx5e_fill_skb_data(struct sk_buff *skb, struct mlx5e_rq *rq,
 
 static struct sk_buff *
 mlx5e_skb_from_cqe_mpwrq_nonlinear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
-				   u16 cqe_bcnt, u32 head_offset, u32 page_idx)
+				   struct mlx5_cqe64 *cqe, u16 cqe_bcnt, u32 head_offset,
+				   u32 page_idx)
 {
 	union mlx5e_alloc_unit *au = &wi->alloc_units[page_idx];
 	u16 headlen = min_t(u16, MLX5E_RX_MAX_HEAD, cqe_bcnt);
@@ -1968,7 +1968,8 @@ mlx5e_skb_from_cqe_mpwrq_nonlinear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *w
 
 static struct sk_buff *
 mlx5e_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
-				u16 cqe_bcnt, u32 head_offset, u32 page_idx)
+				struct mlx5_cqe64 *cqe, u16 cqe_bcnt, u32 head_offset,
+				u32 page_idx)
 {
 	union mlx5e_alloc_unit *au = &wi->alloc_units[page_idx];
 	u16 rx_headroom = rq->buff.headroom;
@@ -1999,7 +2000,7 @@ mlx5e_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
 		struct mlx5_xdp_buff mxbuf;
 
 		net_prefetchw(va); /* xdp_frame data area */
-		mlx5e_fill_xdp_buff(rq, va, rx_headroom, cqe_bcnt, &mxbuf);
+		mlx5e_fill_xdp_buff(rq, cqe, va, rx_headroom, cqe_bcnt, &mxbuf);
 		if (mlx5e_xdp_handle(rq, au->page, prog, &mxbuf)) {
 			if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags))
 				__set_bit(page_idx, wi->xdp_xmit_bitmap); /* non-atomic */
@@ -2163,8 +2164,8 @@ static void mlx5e_handle_rx_cqe_mpwrq_shampo(struct mlx5e_rq *rq, struct mlx5_cq
 		if (likely(head_size))
 			*skb = mlx5e_skb_from_cqe_shampo(rq, wi, cqe, header_index);
 		else
-			*skb = mlx5e_skb_from_cqe_mpwrq_nonlinear(rq, wi, cqe_bcnt, data_offset,
-								  page_idx);
+			*skb = mlx5e_skb_from_cqe_mpwrq_nonlinear(rq, wi, cqe, cqe_bcnt,
+								  data_offset, page_idx);
 		if (unlikely(!*skb))
 			goto free_hd_entry;
 
@@ -2238,7 +2239,8 @@ static void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cq
 			      mlx5e_skb_from_cqe_mpwrq_linear,
 			      mlx5e_skb_from_cqe_mpwrq_nonlinear,
 			      mlx5e_xsk_skb_from_cqe_mpwrq_linear,
-			      rq, wi, cqe_bcnt, head_offset, page_idx);
+			      rq, wi, cqe, cqe_bcnt, head_offset,
+			      page_idx);
 	if (!skb)
 		goto mpwrq_cqe_out;
 
@@ -2575,7 +2577,7 @@ static void mlx5e_trap_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe
 		goto free_wqe;
 	}
 
-	skb = mlx5e_skb_from_cqe_nonlinear(rq, wi, cqe_bcnt);
+	skb = mlx5e_skb_from_cqe_nonlinear(rq, wi, cqe, cqe_bcnt);
 	if (!skb)
 		goto free_wqe;
 
-- 
2.38.1.584.g0f3c55d4c2-goog





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