lpfc_oas_lun_state_store(9)

💅 lpfc_oas_lun_state_store ✨

okay bestie, buckle up, because today we're reading a kernel API page — specifically the lpfc_oas_lun_state_store(9) entry from the Kernel API Manual. yes, the manual. we're doing lore today. 🎀

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🌸 NAME 🌸

lpfc_oas_lun_state_store — this one's whole job is storing the state (enabled or disabled) of whether luns are gonna be enabled or disabled for Optimized Access Storage (OAS) operations. like, it's the switch-flipper for OAS luns, no cap. ✨

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🦋 SYNOPSIS 🦋

ssize_t lpfc_oas_lun_state_store (struct device *dev , struct
       device_attribute *attr , const char *buf , size_t count );

look at that signature, it's giving very "kernel function, do not perceive me" energy 💀

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💖 ARGUMENTS 💖

• dev — the class device that gets converted into a Scsi_host. glow-up moment, honestly. 🔥
• attr — the device attribute. not used. she's just there for moral support, and we respect her for it 🫶
• buf — the buffer for passing information. the little messenger bag of the function tbh 🎀
• count — size of the data buffer. gotta know how much stuff we're carrying, bestie 💅

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💀 RETURN 💀

okay this is the important part, eyes up:

• -EINVAL — count is invalid, or the wwpn byte is invalid. invalid vibes, return to sender 🙈
• -EPERM — oas is not supported by the hba. not allowed, no permission, go home 😭
• value of count — on success. slay, it worked ✨

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👑 SEE ALSO 👑

the kernel file lives at ./drivers/scsi/lpfc/lpfc_attr.c, and here is the entire friend group — every single one of them, so don't you dare skip a single name, i see you 👀:

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_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_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).

that's the whole roster. squad goals fr fr 🌈

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heads up bestie: attr genuinely isn't used here — that's not me being lazy, that's just the truth of the page 💜

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and that's the whole read! this lil page comes from ./drivers/scsi/lpfc, dated October 2026, and it's section 9 of the Kernel API Manual. kudos to the kernel docs for keeping it real 💅✨ byeeee 🦋