_ctl_ioctl_main(9)

💅 _ctl_ioctl_main — main ioctl entry point

okay so bestie, welcome to the Kernel API Manual ✨ this one's a kernel-level icon and tbh it's short but she is important. Sit down, hydrate, let's get into it 🫶

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🌸 NAME 🌸

_ctl_ioctl_main — main ioctl entry point 💫

like… the main character of ioctl entry points, literally.

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✨ SYNOPSIS ✨

long _ctl_ioctl_main (struct file *file , unsigned int cmd , void __user
*arg , u8 compat , u16 mpi_version );

that's the whole signature, no cap. long return, five args, she's built different 🔥

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🎀 ARGUMENTS 🎀

• file (struct file) — the file, bestie. that's literally it. it's a struct file and it's here 💖
• cmd — the ioctl opcode, the little number that tells everyone what to do 👑
• arg — the user space data buffer, aka where the actual data hangs out 🦋
• compat — this cutie handles 32 bit applications running in a 64bit os, iykyk 😭 she's doing the translation work so you don't have to
• mpi_version — the version tag, and listen: it will be MPI2_VERSION for the mpt2ctl ioctl device, and MPI25_VERSION | MPI26_VERSION for the mpt3ctl ioctl device. write that down 📝

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🌈 SEE ALSO 🌈

okay this is the part where the page goes FULL group chat 💀 the kernel file for all of this lives at ./drivers/scsi/mpt3sas/mpt3sas_ctl.c, and here is the entire squad, not a single one skipped, periodt:

• enum block_state(9), _ctl_display_some_debug(9), mpt3sas_ctl_done(9), _ctl_check_event_type(9), mpt3sas_ctl_add_to_event_log(9)
• mpt3sas_ctl_event_callback(9), _ctl_verify_adapter(9), mpt3sas_ctl_pre_reset_handler(9), mpt3sas_ctl_clear_outstanding_ioctls(9), mpt3sas_ctl_reset_done_handler(9)
• _ctl_fasync(9), _ctl_poll(9), _ctl_set_task_mid(9), _ctl_send_mctp_passthru_req(9), _ctl_do_mpt_command(9)
• _ctl_getiocinfo(9), _ctl_eventquery(9), _ctl_eventenable(9), _ctl_eventreport(9), _ctl_do_reset(9)
• _ctl_btdh_search_sas_device(9), _ctl_btdh_search_pcie_device(9), _ctl_btdh_search_raid_device(9), _ctl_btdh_mapping(9)
• _ctl_diag_capability(9), _ctl_diag_get_bufftype(9), _ctl_diag_register_2(9), mpt3sas_enable_diag_buffer(9)
• _ctl_diag_register(9), _ctl_diag_unregister(9), _ctl_diag_query(9), mpt3sas_send_diag_release(9)
• _ctl_diag_release(9), _ctl_diag_read_buffer(9), _ctl_addnl_diag_query(9), _ctl_enable_diag_sbr_reload(9)
• _ctl_compat_mpt_command(9), _ctl_get_mpt_mctp_passthru_adapter(9), mpt3sas_get_device_count(9)
• _ctl_ioctl(9), _ctl_mpt2_ioctl(9), _ctl_ioctl_compat(9), _ctl_mpt2_ioctl_compat(9)
• version_fw_show(9), version_bios_show(9), version_mpi_show(9), version_product_show(9), version_nvdata_persistent_show(9), version_nvdata_default_show(9)
• board_name_show(9), board_assembly_show(9), board_tracer_show(9)
• io_delay_show(9), device_delay_show(9), fw_queue_depth_show(9), host_sas_address_show(9), logging_level_show(9), fwfault_debug_show(9), ioc_reset_count_show(9), reply_queue_count_show(9), BRM_status_show(9)
• host_trace_buffer_size_show(9), host_trace_buffer_show(9), host_trace_buffer_enable_show(9)
• diag_trigger_master_show(9), diag_trigger_master_store(9), diag_trigger_event_show(9), diag_trigger_event_store(9), diag_trigger_scsi_show(9), diag_trigger_scsi_store(9), diag_trigger_mpi_show(9), diag_trigger_mpi_store(9)
• drv_support_bitmap_show(9), enable_sdev_max_qd_show(9), enable_sdev_max_qd_store(9)
• sas_address_show(9), sas_device_handle_show(9), sas_ncq_prio_supported_show(9), sas_ncq_prio_enable_show(9)
• mpt3sas_ctl_init(9), mpt3sas_ctl_release(9), mpt3sas_ctl_exit(9)

like… that's the whole friend group and every single one of them showed up to the party 💜 go read them, they know things.

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fr fr tho, the mpi_version argument is the one people mess up — MPI2_VERSION for mpt2ctl, and MPI25_VERSION | MPI26_VERSION for mpt3ctl. don't mix 'em up bestie 🙈

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and that's the page!! mwah 💋 this gem ships out of ./drivers/scsi/mpt3sas and the date on it is October 2026 — yes, the future, she's ahead of her time ⭐ slay, bye 🦋🎀