target_cmd_size_check(9)

💖 target_cmd_size_check(9) 💖

okay so bestie, welcome to the target_cmd_size_check(9) era — it's a kernel API manual page and honestly it's kind of a little legend. the vibe? it checks whether there's gonna be a residual. yes, residual. slay. ✨

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🌸 NAME 🌸

target_cmd_size_check — literally just checks whether there will be a residual 💅

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🎀 SYNOPSIS 🎀

sense_reason_t target_cmd_size_check (struct se_cmd *cmd , unsigned int size );

that's it, that's the whole signature, no cap 🫶

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🦋 ARGUMENTS 🦋

• cmd — the SCSI command, bestie. that's the one.
• size — the data buffer size derived from the CDB. and listen, the data buffer size that the SCSI transport driver provides is available in cmd->data_length. iykyk 💫

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⭐ DESCRIPTION ⭐

so what does it actually do, you ask? it compares the data buffer size from the CDB with the data buffer limit from the transport header. and if necessary — and only if necessary, okay — it sets cmd->residual_count and either SCF_OVERFLOW_BIT or SCF_UNDERFLOW_BIT. that's the whole assignment. main character behaviour, honestly 🔥

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💀 NOTE 💀

target drivers set cmd->data_length by calling __target_init_cmd. that's the note. write it down. 🙈

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👑 RETURN 👑

TCM_NO_SENSE

that's what you get back. that's it. periodt. ✨

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🌈 SEE ALSO 🌈

kernel file ./drivers/target/target_core_transport.c — go read it, bestie, it's giving source of truth 💜

• transport_init_session(9)
• transport_alloc_session(9)
• transport_alloc_session_tags(9)
• transport_init_session_tags(9)
• target_init_cmd(9)
• target_submit_prep(9)
• target_submit_cmd(9)
• target_queue_submission(9)
• target_submit(9)
• target_submit_tmr(9)
• target_get_sess_cmd(9)
• target_put_sess_cmd(9)
• target_stop_cmd_counter(9)
• target_stop_session(9)
• target_wait_for_cmds(9)
• target_wait_for_sess_cmds(9)
• transport_wait_for_tasks(9)
• translate_sense_reason(9)
• target_send_busy(9)

whole friend group, honestly 🧚

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and that's the page!! this little icon lives in ./drivers/target, dated October 2026, and yes that's the whole footer vibe — it's the ./drivers/target release, October 2026, for target_cmd_size_check(9). bye bestie, go check some residuals 💖🎀🌸