diag_ftp_2c4(9)

✨ NAME ✨

okay so bestie, this is diag_ftp_2c4(9) from the Kernel API Manual — it's literally the DIAGNOSE X'2C4' service call 💖 iconic behavior only.

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🦋 SYNOPSIS 🦋

int diag_ftp_2c4 (struct diag_ftp_ldfpl *fpl , enum hmcdrv_ftp_cmdid cmd
);

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💅 ARGUMENTS 💅

• fpl — pointer to prepared LDFPL 🫶
• cmd — FTP command to be executed ⚡

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🌸 DESCRIPTION 🌸

So this function performs a DIAGNOSE X'2C4' call with the (input/output) FTP parameter list fpl and FTP function code cmd ✨. In case of an error, the function does nothing and returns an (negative) error code 😭 — no extra drama, just a sad little negative number.

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🎀 NOTES 🎀

1. This function only initiates a transfer, so the caller must wait for completion (asynchronous execution) — it's giving main character energy, but it does not wait around for the ending 💀.
2. The FTP parameter list fpl must be aligned to a double-word boundary, fr fr 🧚.
3. fpl->bufaddr must be a real address, 4k aligned — no cap, this one matters 🔥.

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🔥 SEE ALSO 🔥

Go check out the Kernel file ./drivers/s390/char/diag_ftp.c, plus struct diag_ftp_ldfpl(9), diag_ftp_handler(9), diag_ftp_cmd(9), diag_ftp_startup(9), and diag_ftp_shutdown(9) — the whole squad is linked up 💬👑

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This lil masterpiece comes from the source path ./drivers/s390/char, carries the diag_ftp_2c4(9) name, and is dated October 2026 — periodt 💅🎀