libie_debugfs_module_write(9)

💅 libie_debugfs_module_write(9) — the 'module' file writer ✨

okay so bestie, welcome to the libie_debugfs_module_write(9) page from the Kernel API Manual 😌 this is the little function that handles writes into the 'module' file, and honestly? it's giving "small but essential" energy. no cap.

---

🌸 NAME 🌸

libie_debugfs_module_write — literally just writes into the 'module' file 🎀 that's it, that's the whole vibe.

---

✨ SYNOPSIS ✨

ssize_t libie_debugfs_module_write (struct file *filp , const char
__user *buf , size_t count , loff_t *ppos );

like, look at her. ssize_t return type, four args, iconic signature, no notes 💅

---

🦋 ARGUMENTS 🦋

• filp — the opened file 🫶 that's the file object you're working with, bestie.
• buf — where to find the user's data 👀 it's a const char __user *, so the userland data lives over there and you gotta go get it.
• count — the length of the user's data 📏 a size_t, so it's the size of the payload you're dealing with.
• ppos — file position offset 📍 a loff_t *, because of course the position is a pointer, that's just how this house is run.

---

🔥 SEE ALSO 🔥

• Kernel file ./drivers/net/ethernet/intel/libie/fwlog.c — the source, the mothership, the main character 💜
• libie_fwlog_realloc_rings(9)
• libie_fwlog_supported(9)
• libie_aq_fwlog_set(9)
• libie_fwlog_set(9)
• libie_aq_fwlog_register(9)
• libie_fwlog_register(9)
• libie_fwlog_unregister(9)
• libie_fwlog_print_module_cfg(9)
• libie_debugfs_module_show(9)
• libie_debugfs_nr_messages_read(9)
• libie_debugfs_nr_messages_write(9)
• libie_debugfs_enable_read(9)
• libie_debugfs_enable_write(9)
• libie_debugfs_log_size_read(9)
• libie_debugfs_log_size_write(9)
• libie_debugfs_data_read(9)
• libie_debugfs_data_write(9)
• libie_debugfs_fwlog_init(9)
• libie_aq_fwlog_get(9)
• libie_fwlog_set_supported(9)
• libie_fwlog_init(9)
• libie_fwlog_deinit(9)
• libie_get_fwlog_data(9)

whole friend group of fwlog and debugfs functions, iykyk 🌈 go read them all, they're all slay.

---

💀 reminder: the __user on buf is doing so much work — the user's data is in userland memory, so treat it accordingly. fr fr.

---

and that's the page, babe! 🧚 this came from ./drivers/net/ethernet/intel/l... — yeah it's truncated, don't come for me, that's what the page says 🙈 — and it's dated October 2026. libie_debugfs_module_write(9) forever 💖✨