lpfc_sriov_..._virtfn_show(9)

💅 NAME 💅

lpfc_sriov_hw_max_virtfn_show — okay so this one returns the maximum number of virtual functions, bestie ✨

This is a Kernel API Manual page, and the function goes by lpfc_sriov_..._virtfn_show(9) — yes the ellipsis is literally part of the title, don't come for me, that's just how it's filed 😭

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🦋 SYNOPSIS 🦋

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

That's the whole signature, copied exactly, no cap 🫶

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🎀 ARGUMENTS 🎀

• dev — it's the class, converted into a Scsi_host structure. Glow-up moment for a plain old device 💫
• attr — the device attribute. Not used. She's just here for moral support, iconic behavior honestly 🙈
• buf — on return this contains the formatted support level. That's where the answer lands, periodt 🍓

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🌸 DESCRIPTION 🌸

So what does it actually do? It returns the maximum number of virtual functions that a physical function can support.

And the little twist: 0 gets returned if it's called on a virtual function ✨ (yes, zero, the number, not a vibe — literally 0).

Lowkey important, iykyk 👑

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⭐ RETURN ⭐

The size of the formatted string. That's it, that's the return value 💖

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🌈 SEE ALSO 🌈

The kernel file this lives in: ./drivers/scsi/lpfc/lpfc_attr.c — and then brace yourself, because the friend group is huge 😭💀

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_npiv_info_show(9), lpfc_poll_show(9), lpfc_poll_store(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)

Every single one, nobody got left out, we don't do that here 💜✨

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Fr fr though: the dev arg has to become a Scsi_host, attr is unused, and calling this on a virtual function gives you 0 back. That's the whole tea ☕

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And that's the page, bestie 🎀 it's from the source tree at ./drivers/scsi/lpfc, dated October 2026, filed under the lpfc_sriov_..._virtfn_show(9) header in the Kernel API Manual — slay, go read the code now 💅🫶