lpfc_npiv_info_show(9)

✨ lpfc_npiv_info_show(9) — the kernel-api-manual glow-up ✨

okay bestie, so this is literally from the Kernel API Manual and it's giving "niche sysfs show function that ate and left no crumbs." let's get into it 💅

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🎀 NAME 🎀

lpfc_npiv_info_show — return text about NPIV support for the adapter. that's it, that's the vibe. no cap.

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🌸 SYNOPSIS 🌸

ssize_t lpfc_npiv_info_show (struct device *dev , struct
       device_attribute *attr , char *buf );

like, it takes three things and gives you back a ssize_t. iconic behavior honestly.

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🦋 ARGUMENTS 🦋

• dev — the class device that's lowkey getting converted into a Scsi_host. main character energy fr fr.
• attr — device attribute. not used. she's just there for moral support, we respect her 🫶
• buf — the text that must be interpreted to figure out if npiv is supported. this is the whole assignment, the moment, the reason we're all here.

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💖 DESCRIPTION 💖

so the buf is gonna contain text, and that text is telling you one (1) of three things:

1. npiv is not suppoerted on the port — yes the original says "suppoerted", I'm not fixing it, I'm not touching it, I'm keeping it exactly as written, it's character 😭
2. the port is an NPIV physical port
3. or it's an npiv virtual port with the id of the vport ✨

that's the whole tea. three possibilities. she's not complicated, she's just particular.

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🔥 RETURN 🔥

size of formatted string. literally just the size. slay. 💅

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👑 SEE ALSO 👑

okay so buckle up because this list is LONG and I'm not skipping a single one of these, the way that kernel documentation does not do brevity and honestly? obsessed. 🌈

first, the kernel file reference that started it all:

Kernel file ./drivers/scsi/lpfc/lpfc_attr.c

and now, everyone else who lives on this block, no cap:

lpfc_jedec_to_ascii(9), lpfc_drvr_version_show(9), lpfc_enable_fip_show(9), lpfc_info_show(9), lpfc_serialnum_show(9), lpfc_temp_sensor_show(9), lpfc_modeldesc_show(9), lpfc_modelname_show(9), lpfc_programtype_show(9), lpfc_vportnum_show(9), lpfc_fwrev_show(9), lpfc_hdw_show(9), lpfc_option_rom_version_show(9), lpfc_link_state_show(9), lpfc_sli4_protocol_show(9), lpfc_oas_supported_show(9), lpfc_link_state_store(9), lpfc_num_discovered_ports_show(9), lpfc_issue_lip(9), lpfc_do_offline(9), lpfc_reset_pci_bus(9), lpfc_selective_reset(9), lpfc_issue_reset(9), lpfc_sli4_pdev_status_reg_wait(9), lpfc_sli4_pdev_reg_request(9), lpfc_nport_evt_cnt_show(9), lpfc_board_mode_show(9), lpfc_board_mode_store(9), lpfc_get_hba_info(9), lpfc_max_rpi_show(9), lpfc_used_rpi_show(9), lpfc_max_xri_show(9), lpfc_used_xri_show(9), lpfc_max_vpi_show(9), lpfc_used_vpi_show(9), lpfc_poll_show(9), lpfc_poll_store(9), lpfc_sriov_hw_max_virtfn_show(9), lpfc_enable_bbcr_set(9), lpfc_wwn_set(9), lpfc_oas_tgt_show(9), lpfc_oas_tgt_store(9), lpfc_oas_priority_show(9), lpfc_oas_priority_store(9), lpfc_oas_vpt_show(9), lpfc_oas_vpt_store(9), lpfc_oas_lun_state_show(9), lpfc_oas_lun_state_store(9), lpfc_oas_lun_status_show(9), lpfc_oas_lun_state_set(9), lpfc_oas_lun_get_next(9), lpfc_oas_lun_state_change(9), lpfc_oas_lun_show(9), lpfc_oas_lun_store(9), lpfc_nodev_tmo_show(9), lpfc_nodev_tmo_init(9), lpfc_update_rport_devloss_tmo(9), lpfc_nodev_tmo_set(9), lpfc_devloss_tmo_set(9), lpfc_tgt_queue_depth_set(9), lpfc_restrict_login_init(9), lpfc_restrict_login_set(9), lpfc_topology_store(9), lpfc_static_vport_show(9), lpfc_link_speed_store(9), lpfc_link_speed_init(9), lpfc_aer_support_store(9), lpfc_aer_cleanup_state(9), lpfc_sriov_nr_virtfn_store(9), lpfc_request_firmware_upgrade_store(9), lpfc_request_firmware_upgrade_init(9), lpfc_force_rscn_store(9), lpfc_force_rscn_init(9), lpfc_fcp_imax_store(9), lpfc_fcp_imax_init(9), lpfc_cq_max_proc_limit_store(9), lpfc_cq_max_proc_limit_init(9), lpfc_fcp_cpu_map_show(9), lpfc_fcp_cpu_map_store(9), lpfc_fcp_cpu_map_init(9), lpfc_cpumask_irq_mode_init(9), lpfc_irq_chann_show(9), lpfc_sg_seg_cnt_show(9), lpfc_sg_seg_cnt_init(9), sysfs_ctlreg_write(9), sysfs_ctlreg_read(9), sysfs_mbox_write(9), sysfs_mbox_read(9), lpfc_alloc_sysfs_attr(9), lpfc_free_sysfs_attr(9), lpfc_get_host_symbolic_name(9), lpfc_get_host_port_id(9), lpfc_get_host_port_type(9), lpfc_get_host_port_state(9), lpfc_get_host_speed(9), lpfc_get_host_fabric_name(9), lpfc_get_stats(9), lpfc_reset_stats(9), lpfc_get_enc_info(9), lpfc_get_node_by_target(9), lpfc_get_starget_port_id(9), lpfc_get_starget_node_name(9), lpfc_get_starget_port_name(9), lpfc_set_rport_loss_tmo(9), lpfc_set_vport_symbolic_name(9), lpfc_hba_log_verbose_init(9), lpfc_get_hba_function_mode(9), lpfc_get_cfgparam(9), lpfc_nvme_mod_param_dep(9), lpfc_get_vport_cfgparam(9)

like I said. LONG. but every single one is here because we don't gatekeep and we don't skip entries. periodt. 💀✨

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lowkey a reminder bestie: this is all about the lpfc driver's sysfs attribute machinery. the buf output is the whole point — interpret it right or you're not getting the npiv tea. 🙈

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and that's the whole page, bestie! 🧚 this came straight out of ./drivers/scsi/lpfc and it's dated October 2026 — fr fr, put it in your calendar, the kernel docs said so. 💜🎀💅