mlx5dv_create_fl...ion_modify_header(3)

🎀 mlx5dv_create_flow_action_modify_header 🎀

okay bestie, this page is from the mlx5dv_create_fl...ion_modify_header(3) manual, and it's giving “let me mutate a packet header” energy. iconic. ✨

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🌸 NAME 🌸

mlx5dv_create_flow_action_modify_header — Flow action modify header for mlx5 provider. no cap, that's the whole name vibe. 💅

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✨ SYNOPSIS ✨

              #include <infiniband/mlx5dv.h>

              struct ibv_flow_action *
              mlx5dv_create_flow_action_modify_header(struct ibv_context *ctx,
                                  size_t actions_sz,
                                  uint64_t actions[],
                                  enum mlx5dv_flow_table_type ft_type)

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🦋 DESCRIPTION 🦋

so this function creates a modify header flow steering action, and it lets you mutate a packet header. yes, actual packet-header makeover. 💖

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💜 ARGUMENTS 💜

• ctx — the RDMA device context you're creating the action on. literally the context bestie. 🫶
• actions_sz — the size of the actions buffer, in bytes. count those bytes, queen. 🔥
• actions — a buffer containing the modify actions provided in device spec format (i.e. be64). keep it exact, iykyk. ⭐
• ft_type — defines the flow table type to which the modify header action will be attached. the vibe check for where this action lives. 💫
  • MLX5DV_FLOW_TABLE_TYPE_NIC_RX: RX FLOW TABLE
  • MLX5DV_FLOW_TABLE_TYPE_NIC_TX: TX FLOW TABLE

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👑 RETURN VALUE 👑

upon success, mlx5dv_create_flow_action_modify_header will return a new struct ibv_flow_action object. slay. ✨

on error, NULL will be returned and errno will be set. not the cute outcome, but at least you know. 😭

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🌈 SEE ALSO 🌈

• ibv_create_flow(3)
• ibv_create_flow_action(3)

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that's the whole page, bestie 💖 source/version and date: not listed on this page — the footer is just the manual name mlx5dv_create_fl...ion_modify_header(3) — so here's your cute lil sign-off instead 🫶🎀✨