STRUCT FC_LPORT(9)

🎀 NAME 🎀

Welcome to the Kernel API Manual, bestie 💖 — this page is struct fc_lport(9), aka the Local port. Short name section, maximum main-character energy 👑.

✨ SYNOPSIS ✨

Okay so here's the exact struct, no cap — every field stays exactly as written:

struct fc_lport {
    struct Scsi_Host               *host;
    struct list_head               ema_list;
    struct fc_rport_priv           *dns_rdata;
    struct fc_rport_priv           *ms_rdata;
    struct fc_rport_priv           *ptp_rdata;
    void *scsi_priv;
    struct fc_disc                 disc;
    struct list_head               vports;
    struct fc_vport                *vport;
    struct libfc_function_template tt;
    u8 link_up;
    u8 qfull;
    u16 vlan;
    enum fc_lport_state            state;
    unsigned long                  boot_time;
    struct fc_host_statistics      host_stats;
    struct fc_stats __percpu       *stats;
    u8 retry_count;
    u32 port_id;
    u64 wwpn;
    u64 wwnn;
    unsigned int                   service_params;
    unsigned int                   e_d_tov;
    unsigned int                   r_a_tov;
    struct fc_els_rnid_gen         rnid_gen;
    u32 sg_supp:1;
    u32 seq_offload:1;
    u32 crc_offload:1;
    u32 lro_enabled:1;
    u32 does_npiv:1;
    u32 npiv_enabled:1;
    u32 point_to_multipoint:1;
    u32 fdmi_enabled:1;
    u32 mfs;
    u8 max_retry_count;
    u8 max_rport_retry_count;
    u16 rport_priv_size;
    u16 link_speed;
    u16 link_supported_speeds;
    u16 lro_xid;
    unsigned int                   lso_max;
    struct fc_ns_fts               fcts;
    struct mutex                   lp_mutex;
    struct list_head               list;
    struct delayed_work            retry_work;
    void *prov[FC_FC4_PROV_SIZE];
    struct list_head               lport_list;
 };

🫶 Members 🫶

Now let's go member by member, bestie. These field names are literal, so keep them exactly as shown 🌸.

• host — the SCSI host associated with a local port.
• ema_list — the exchange manager anchor list.
• dns_rdata — the directory server remote port.
• ms_rdata — the management server remote port.
• ptp_rdata — point to point remote port.
• scsi_priv — FCP layer internal data.
• disc — discovery context.
• vports — child vports if N_Port.
• vport — parent vport if VN_Port.
• tt — Libfc function template.
• link_up — link state: 1 = link up, 0 = link down. Periodt.
• qfull — queue state: 1 queue is full, 0 queue is not full.
• state — identifies the state.
• boot_time — timestamp indicating when the local port came online. ⏰
• host_stats — SCSI host statistics.
• stats — FC local port stats (the page literally has a TODO about separating libfc LLD stats).
• retry_count — number of retries in the current state.
• port_id — FC Port ID.
• wwpn — World Wide Port Name.
• wwnn — World Wide Node Name.
• service_params — common service parameters.
• e_d_tov — error detection timeout value.
• r_a_tov — resource allocation timeout value.
• rnid_gen — RNID information.
• sg_supp — indicates if scatter gather is supported. ✨
• seq_offload — indicates if sequence offload is supported.
• crc_offload — indicates if CRC offload is supported.
• lro_enabled — indicates if large receive offload is supported.
• does_npiv — supports multiple vports.
• npiv_enabled — switch/fabric allows NPIV.
• mfs — the maximum Fibre Channel payload size.
• max_retry_count — the maximum retry attempts.
• max_rport_retry_count — the maximum remote port retry attempts.
• rport_priv_size — size needed by driver after struct fc_rport_priv.
• lro_xid — the maximum XID for LRO.
• lso_max — the maximum large offload send size.
• fcts — FC-4 type mask.
• lp_mutex — mutex to protect the local port.
• list — linkage on list of vport peers.
• retry_work — handle to local port for delayed retry context.
• prov — pointers available for use by passive FC-4 providers.
• lport_list — linkage on module-wide list of local ports.

Tiny side note, bestie 🫶: the struct code above also has vlan, point_to_multipoint, fdmi_enabled, link_speed, and link_supported_speeds fields. This page's Members list doesn't give those individual blurbs, so I'm not inventing any tea — the code block is the receipts 💅.

🌈 SEE ALSO 🌈

The Kernel file is ./include/scsi/libfc.h — yes, that exact path — and here are all the cross-reference besties:

• enum fc_lport_state(9)
• enum fc_rport_state(9)
• struct fc_disc_port(9)
• enum fc_rport_event(9)
• struct fc_rport_operations(9)
• struct fc_rport_libfc_priv(9)
• struct fc_rport_priv(9)
• struct fc_stats(9)
• struct fc_seq_els_data(9)
• struct fc_fcp_pkt(9)
• struct fc_seq(9)
• struct fc_exch(9)
• struct fc_disc(9)
• struct fc4_prov(9)
• fc_lport_test_ready(9)
• fc_set_wwnn(9)
• fc_set_wwpn(9)
• fc_lport_state_enter(9)
• fc_lport_init_stats(9)
• fc_lport_free_stats(9)
• lport_priv(9)
• libfc_host_alloc(9)

That's the whole manual page, bestie 💖 — source/version ./include/scsi, date October 2026, and the page is struct fc_lport(9). Mwah 💋