bpf_path_d_path(9)

💅 bpf_path_d_path(9) — like, the Kernel API Manual page, bestie 🎀

okay so this is bpf_path_d_path(9) from the Kernel API Manual, and honestly? she's that girl. let's get into it ✨

---

🌸 NAME 🌸

bpf_path_d_path — resolves the pathname for the path you hand her 🫶

---

⭐ SYNOPSIS ⭐

__bpf_kfunc int bpf_path_d_path (const struct path *path , char *buf ,
size_t buf__sz );

no cap, that's the whole signature. copy it exactly, don't get creative 💅

---

🦋 ARGUMENTS 🦋

• path — the path you want the pathname resolved for. she's the main character here 🔥
• buf — the buffer where the resolved pathname gets returned. put it in, she goes there 💖
• buf__sz — the length of the buffer you supplied. yes, the size matters, keep it correct 🙈

---

💜 DESCRIPTION 💜

So what she does: she resolves the pathname for the supplied path and stores it in buf. simple, iconic, no drama 🌈

This BPF kfunc is literally the safer variant of the legacy bpf_d_path helper, and you should use it in place of bpf_d_path whenever possible. like, if you can use her, use her. she ate 🍓

⚠️ big one: this BPF kfunc may only be called from BPF LSM programs. that's the vibe check and she will fail you if you ignore it 💀

---

👑 RETURN 👑

• On success: a positive integer corresponding to the length of the resolved pathname in buf, including the NUL termination character (yes, the NUL counts, don't forget her ⭐)
• On error: a negative integer is returned 😭

---

🧚 SEE ALSO 🧚

Kernel file ./fs/bpf_fs_kfuncs.c, plus her whole friend group:

• bpf_get_task_exe_file(9)
• bpf_put_file(9)
• bpf_get_dentry_xattr(9)
• bpf_get_file_xattr(9)
• bpf_set_dentry_xattr_locked(9)
• bpf_remove_dentry_xattr_locked(9)
• bpf_set_dentry_xattr(9)
• bpf_remove_dentry_xattr(9)
• bpf_cgroup_read_xattr(9)
• bpf_sock_read_xattr(9)
• bpf_real_data_inode(9)

like, the whole group chat is in here fr fr 🫶

---

okay that's the whole page, mwah 💋 this dropped from ./fs back in October 2026, and yep, the page itself is bpf_path_d_path(9) — you're so welcome bestie, go resolve those pathnames responsibly ✨💖🎀