efi_capsule_open(9)

💖 efi_capsule_open(9) — the kernel API manual, bestie edition 🎀

Okay so real talk, this is the man page for efi_capsule_open, straight out of the kernel API manual. Yes it's a kernel function. Yes it's fancy. No you don't have to be scared. Let's go. ✨

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🌸 NAME 🌸

efi_capsule_open — literally just "called by file open", that's the whole vibe 🫶

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🦋 SYNOPSIS 🦋

int efi_capsule_open (struct inode *inode , struct file *file );

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🎀 ARGUMENTS 🎀

• inode — bestie. queen. not used. she's just here for the vibes, we literally do not touch her 💅
• file — a file pointer, that's it, that's the whole thing 📁

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💜 DESCRIPTION 💜

So what happens is: every single time there's a file open call, this bad boy allocates each capsule_info memory for it. Like, each open gets its own. Iconic. 💫

And why do we care?? Because of this beautiful thing: it provides the capability to support the multiple file open feature, which means a user is not needed to wait for others to finish in order to upload their capsule binary. No standing in line, no "hurry up", nobody blocking your upload. Main character energy for every single caller, periodt. 👑

ngl that's the whole point of the design — concurrency rights for all, no queue, no drama 🧚

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⭐ SEE ALSO ⭐

• Kernel file: ./drivers/firmware/efi/capsule-loader.c
• efi_free_all_buff_pages(9)
• efi_capsule_setup_info(9)
• efi_capsule_submit_update(9)
• efi_capsule_write(9)
• efi_capsule_release(9)

iykyk, go read the whole friend group 💖

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And that's the page!! Footer time, but make it cute: this one lives in ./drivers/firmware/efi, dated October 2026. Slay, see you in 2026 bestie 🌈🦋🍓