libie_debugf...g_size_write(9)

💅 libie_debugf...g_size_write(9) — like, the Kernel API Manual, bestie ✨

okay so real talk, this one's from the Kernel API Manual, and the whole energy is "tiny debugfs write handler that just does its one job." Her name is libie_debugf...g_size_write (yes the abbrev is a vibe, we don't question it 🎀) and she is out here writing into the log_size file. That's it. That's the whole plot. Slay.

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✨ NAME ✨

libie_debugfs_log_size_write — write into the log_size file 💖

Like, literally. You write. Into log_size. She ate and left no crumbs.

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🦋 SYNOPSIS 🦋

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

returns an ssize_t, takes four args, no notes. periodt. 💅

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🌸 ARGUMENTS 🌸

Okay bestie, let's do the vibe check on each one, one by one, no skipping, iykyk:

• filp — the opened file 🫶 like, the actual file that's open right now, that's her.
• buf — where to find the user's data ✨ it's const char __user * so yes, it's coming from userspace, handle with care.
• count — the length of the user's data 📏 how much stuff we're working with.
• ppos — file position offset 📍 the little "where are we in the file" pointer, iconic behaviour.

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👑 SEE ALSO 👑

the whole friend group, fr fr — go say hi to all of them:

• Kernel file ./drivers/net/ethernet/intel/libie/fwlog.c 🍓 (that's home base, that's where she lives)
• 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_module_write(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_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)

like, that's the entire group chat right there 😭💜

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ngl there are no OPTIONS, no ENVIRONMENT variables, no EXIT STATUSES, no BUGS and no RETURN VALUE section on this page — she's a short queen, and that's on purpose 🧚 don't go looking for lore that isn't there, bestie 🙈

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🌈 and that's the whole page!! source is ./drivers/net/ethernet/intel/l..., dated October 2026 — so future iconic of her honestly ⭐ mwah, ty for reading, go write to your log_size file responsibly 💖🎀🦋