STRUCT _SAS_NODE(9)

💖 NAME 💖

okay bestie, this is the struct _sas_node(9) page from the Kernel API Manual, and it's serving sas_host/expander information realness. we're going member by member, no skips, no cap. 🫶✨

✨ SYNOPSIS ✨

here's the struct in all its iconic glory — copy it exactly, bestie:

struct _sas_node {
    struct list_head list;
    struct device *parent_dev;
    u8 num_phys;
    u64 sas_address;
    u16 handle;
    u64 sas_address_parent;
    u16 enclosure_handle;
    u64 enclosure_logical_id;
    u8 responding;
    u8 nr_phys_allocated;
    struct hba_port *port;
    struct _sas_phy *phy;
    struct list_head sas_port_list;
    struct sas_rphy *rphy;
};

🎀 Members 🎀

member-by-member vibe check, and every one of these is listed here, periodt. 💅

• list — literally the list of expanders. 💫
• parent_dev — the parent device class.
• num_phys — the number of phys belonging to this sas_host/expander.
• sas_address — the sas address of this sas_host/expander.
• handle — the handle for this sas_host/expander.
• sas_address_parent — the sas address of the parent expander or sas host.
• enclosure_handle — the handle for this node as a member of an enclosure.
• responding — used in _scsih_expander_device_mark_responding. 🔥
• nr_phys_allocated — allocated memory for this many count phys.
• port — the hba port entry containing the node's port number info.
• phy — a list of phys that make up this sas_host/expander.
• sas_port_list — list of ports attached to this sas_host/expander.
• rphy — the sas_rphy object of this expander.

quick tiny note, bestie: enclosure_logical_id is in the struct synopsis above, but the Members list doesn't give it its own separate blurb here — so I'm not inventing extra lore. 🙈

🌈 SEE ALSO 🌈

Kernel file: ./drivers/scsi/mpt3sas/mpt3sas_base.h — and the struct/see-also besties are:

• struct MPT3SAS_TARGET(9)
• struct MPT3SAS_DEVICE(9)
• struct _internal_cmd(9)
• struct _sas_device(9)
• pcie_device_get(9)
• pcie_device_free(9)
• pcie_device_put(9)
• struct _boot_device(9)
• struct _sas_port(9)
• struct _sas_phy(9)
• struct _enclosure_node(9)
• enum reset_type(9)
• struct pcie_sg_list(9)
• struct chain_tracker(9)
• struct scsiio_tracker(9)
• struct request_tracker(9)
• struct _tr_list(9)
• struct _sc_list(9)
• struct _event_ack_list(9)
• struct adapter_reply_queue(9)
• struct io_uring_poll_queue(9)
• struct virtual_phy(9)
• struct hba_port(9)
• struct htb_rel_query(9)
• struct MPT3SAS_ADAPTER(9)

signed off with 💖 from source/version ./drivers/scsi/mpt3sas, October 2026 — date and source cute and accounted for, bye bestie! 💋👑