tracefs_create_file(9)

✨ NAME ✨

tracefs_create_file — okay so this is the Kernel API Manual entry for creating a file in the tracefs filesystem. 💖 Slay.

🦋 SYNOPSIS 🦋

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

🌸 ARGUMENTS 🌸

• name — a pointer to a string containing the name of the file to create. 💅
• mode — the permission that the file should have. ✨
• 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 tracefs filesystem. 🦋
• 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. 🎀
• fops — a pointer to a struct file_operations that should be used for this file. 🔥

💜 DESCRIPTION 💜

Okay so this is the basic “create a file” function for tracefs. It allows for a wide range of flexibility in creating a file, or a directory — and if you want to create a directory, the tracefs_create_dir function is recommended to be used instead. 🫶

This function will return a pointer to a dentry if it succeeds. That pointer must be passed to the tracefs_remove function when the file is to be removed.

⚠️ no automatic cleanup happens if your module is unloaded — you are responsible here. 😭

If an error occurs, NULL will be returned.

If tracefs is not enabled in the kernel, the value -ENODEV will be returned. 💀

🌈 SEE ALSO 🌈

• Kernel file ./fs/tracefs/inode.c
• tracefs_create_dir(9)
• tracefs_create_instance_dir(9)
• tracefs_remove(9)
• tracefs_initialized(9)

source/version: ./fs/tracefs · date: October 2026. that’s the whole page, bestie — mwah 💋✨