STRUCT DEVLINK_PORT_REGION_OPS(9)

✨ struct devlink_port_region_ops — Region operations for a port ✨

okay so bestie, welcome to the Kernel API Manual 🫶 this is the page for struct devlink_port_region_ops, and it's basically the little operations handbook a devlink port hands over so the kernel knows how to name its region, take a snapshot of it, and read chunks out of it. iconic behavior, honestly 💅

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🌸 NAME 🌸

struct devlink_port_region_ops — Region operations for a port 💖

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🦋 SYNOPSIS 🦋

struct devlink_port_region_ops {
    const char *name;
    void (*destructor)(const void *data);
    int (*snapshot)(struct devlink_port *port, const struct devlink_port_region_ops *ops, struct netlink_ext_ack *extack, u8 **data);
    int (*read)(struct devlink_port *port, const struct devlink_port_region_ops *ops, struct netlink_ext_ack *extack, u64 offset, u32 size, u8 *data);
    void *priv;
};

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🎀 Members 🎀

so like, here's the whole cast of characters, main character energy only ✨

⭐ name

the region name, periodt. that's it, that's the vibe 🎯

💀 destructor

the callback used to free snapshot memory when deleting — it's giving cleanup crew, it's giving "you had your fun, now let it go" 🧹✨ signature is void (*destructor)(const void *data).

📸 snapshot

callback to request an immediate snapshot. on success, the data variable must be updated to point to the snapshot data 🔥 no cap — if it succeeds you gotta set it. heads up though: this function will be called while the devlink instance lock is held, so don't go doing anything unhinged in there 😭🙈

📖 read

callback to directly read a portion of the region. on success, the data pointer will be updated with the contents of the requested portion of the region 🍓 also, same warning as above: this function will be called while the devlink instance lock is held — locked and loaded, bestie 🔒

🧚 priv

pointer to driver private data for the region operation — your little stash of secrets, iykyk 💜

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🌈 SEE ALSO 🌈

Kernel file ./include/net/devlink.h, plus the whole friend group:

• struct devlink_port_pci_pf_attrs(9)
• struct devlink_port_pci_vf_attrs(9)
• struct devlink_port_pci_sf_attrs(9)
• struct devlink_port_attrs(9)
• struct devlink_linecard_ops(9)
• struct devlink_dpipe_field(9)
• struct devlink_dpipe_header(9)
• struct devlink_dpipe_match(9)
• struct devlink_dpipe_action(9)
• struct devlink_dpipe_value(9)
• struct devlink_dpipe_entry(9)
• struct devlink_dpipe_dump_ctx(9)
• struct devlink_dpipe_table(9)
• struct devlink_dpipe_table_ops(9)
• struct devlink_dpipe_headers(9)
• struct devlink_resource_size_params(9)
• struct devlink_flash_notify(9)
• struct devlink_param(9)
• struct devlink_flash_update_params(9)
• struct devlink_region_ops(9)
• struct devlink_health_reporter_ops(9)
• struct devlink_trap_metadata(9)
• struct devlink_trap_policer(9)
• struct devlink_trap_group(9)
• struct devlink_trap(9)
• struct devlink_port_ops(9)

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lowkey a whole syllabus of devlink structs — go read them, bestie, you'll slay 📚👑

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aaand that's the page!! 🎉 brought to you from ./include/net, dated October 2026, and yeah the header/footer both say struct devli...t_region_ops(9) because the terminal truncated it, not me 😭 stay hydrated, take your snapshots responsibly, mwah 💋💖