debugfs_create_file_size(9)

💖 debugfs_create_file_size(9) 💖

okay so bestie, welcome to the Kernel API Manual page for debugfs_create_file_size — it’s giving “make a file in debugfs,” and we are keeping every single deet. 🫶✨

🌸 NAME 🌸

debugfs_create_file_size — create a file in the debugfs filesystem. periodt. 💅

🎀 SYNOPSIS 🎀

here’s the whole signature, copy it exactly bestie:

       void debugfs_create_file_size (const char *name , umode_t mode , struct
       dentry *parent , void *data , const struct file_operations *fops ,
       loff_t file_size );

🦋 ARGUMENTS 🦋

• name — a pointer to a string containing the name of the file to create. name reveal, but for a file 💖
• mode — the permission that the file should have. set the vibe check on permissions.
• parent — a pointer to the parent dentry for this file. This should be a directory dentry if set. If this parameter is NULL, then the file will be created in the root of the debugfs filesystem. no pressure. 🫶
• data — a pointer to something that the caller will want to get to later on. The inode.i_private pointer will point to this value on the open call. lowkey important, ngl.
• fops — a pointer to a struct file_operations that should be used for this file. like the file’s whole personality, fr fr.
• file_size — initial file size. starting size, main character energy. ✨

🔥 DESCRIPTION 🔥

This is literally the basic "create a file" function for debugfs. It allows for a wide range of flexibility in creating a file, or a directory — and if you want to create a directory, the debugfs_create_dir function is recommended to be used instead. no cap. 🔥

💅 SEE ALSO 💅

Kernel file ./fs/debugfs/inode.c — then the whole squad:

• debugfs_lookup(9)
• debugfs_create_file_unsafe(9)
• debugfs_create_dir(9)
• debugfs_create_automount(9)
• debugfs_create_symlink(9)
• debugfs_remove(9)
• debugfs_lookup_and_remove(9)
• debugfs_change_name(9)
• debugfs_initialized(9)

kay bye bestie, that’s the page — source/version is ./fs/debugfs, dated October 2026 🌈✨💜