mpi3mr_is_expander_device(9)

💅 mpi3mr_is_expander_device(9) — like, the whole vibe check for expanders ✨

okay so before we even get into it — this page lives in the Kernel API Manual, and the function is literally called mpi3mr_is_expander_device. yes bestie, it does exactly what it says on the tin 🎀

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✨ NAME ✨

mpi3mr_is_expander_device — the little function that tells you if device is an expander 🦋

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🌸 SYNOPSIS 🌸

u8 mpi3mr_is_expander_device (u16 device_info );

that's it. one argument, one u8 back. lowkey elegant, ngl 💅

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🎀 ARGUMENTS 🎀

• device_info — a bitfield providing information about the device ✨ like, it's the little info packet you hand over so the function can peek inside and go "hmm 👀"

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⭐ RETURN ⭐

• 1 if the device is an expander device 👑
• 0 otherwise 💀

no cap, that's the entire return contract. binary queen behavior fr fr.

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🦋 SEE ALSO 🦋

first up, the kernel file where this all goes down:

• ./drivers/scsi/mpi3mr/mpi3mr_transport.c 🧚

and then the whole friend group — all of these are (9) manpage girlies:

• mpi3mr_post_transport_req(9)
• mpi3mr_report_manufacture(9)
• __mpi3mr_expander_find_by_handle(9)
• mpi3mr_get_sas_address(9)
• __mpi3mr_get_tgtdev_by_addr(9)
• mpi3mr_get_tgtdev_by_addr(9)
• mpi3mr_remove_device_by_sas_address(9)
• __mpi3mr_get_tgtdev_by_addr_and_rphy(9)
• mpi3mr_expander_find_by_sas_address(9)
• __mpi3mr_sas_node_find_by_sas_address(9)
• mpi3mr_parent_present(9)
• mpi3mr_convert_phy_link_rate(9)
• mpi3mr_delete_sas_phy(9)
• mpi3mr_add_sas_phy(9)
• mpi3mr_add_phy_to_an_existing_port(9)
• mpi3mr_delete_sas_port(9)
• mpi3mr_del_phy_from_an_existing_port(9)
• mpi3mr_sas_port_sanity_check(9)
• mpi3mr_set_identify(9)
• mpi3mr_add_host_phy(9)
• mpi3mr_add_expander_phy(9)
• mpi3mr_alloc_hba_port(9)
• mpi3mr_get_hba_port_by_id(9)
• mpi3mr_update_links(9)
• mpi3mr_sas_host_refresh(9)
• mpi3mr_sas_host_add(9)
• mpi3mr_sas_port_add(9)
• mpi3mr_sas_port_remove(9)
• struct host_port(9)
• mpi3mr_update_mr_sas_port(9)
• mpi3mr_refresh_sas_ports(9)
• mpi3mr_refresh_expanders(9)
• mpi3mr_expander_node_add(9)
• mpi3mr_expander_add(9)
• mpi3mr_expander_node_remove(9)
• mpi3mr_expander_remove(9)
• mpi3mr_get_sas_negotiated_logical_linkrate(9)
• mpi3mr_report_tgtdev_to_sas_transport(9)
• mpi3mr_remove_tgtdev_from_sas_transport(9)
• mpi3mr_get_port_id_by_sas_phy(9)
• mpi3mr_get_port_id_by_rphy(9)
• mpi3mr_get_expander_phy_error_log(9)
• mpi3mr_transport_get_linkerrors(9)
• mpi3mr_transport_get_enclosure_identifier(9)
• mpi3mr_transport_get_bay_identifier(9)
• mpi3mr_expander_phy_control(9)
• mpi3mr_transport_phy_reset(9)
• mpi3mr_transport_phy_enable(9)
• mpi3mr_transport_phy_speed(9)
• mpi3mr_map_smp_buffer(9)
• mpi3mr_unmap_smp_buffer(9)
• mpi3mr_transport_smp_handler(9)

like, that's a whole squad right there 🫶 go read them, iykyk 😭

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and that's the whole page bestie — one arg, one bitfield, one iconic little u8. check the device, get your 1 or 0, move on with your life 💖

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✨ mwah ✨ this cutie came from ./drivers/scsi/mpi3mr, dated October 2026, and the source/version footer literally says mpi3mr_is_expander_device(9) — periodt 💅🎀