luo_file_unpreserve_files(9)

💖 luo_file_unpreserve_files(9) 💖

okay bestie, welcome to the Kernel API Manual — today’s main character is luo_file_unpreserve_files(9), and it’s giving cleanup-era energy. no cap, this page is literally about how a file_set gets its files unpreserved. 💅

✨ NAME ✨

luo_file_unpreserve_files — unpreserves all files from a file_set. that’s the whole vibe. 🫶

🦋 SYNOPSIS 🦋

void luo_file_unpreserve_files (struct luo_file_set *file_set );

🎀 ARGUMENTS 🎀

• file_set — the files that are getting cleaned up. that’s the target of this whole glow-up. ✨

💅 DESCRIPTION 💅

okay so luo_file_unpreserve_files is the primary cleanup path for a file_set. it gets invoked when the userspace agent closes the file_set’s file descriptor. so when that fd says bye, this function steps in. 💀

for each file, it performs these cleanup actions:

1. Calls the handler’s .unpreserve callback so the handler can release any resources it allocated. giving the handler its moment to let go. 🦋
2. Removes the file from the file_set’s internal tracking list. not me scrubbing the list. 🧹
3. Releases the reference to 'struct file' that was taken by luo_preserve_file via fput, returning ownership. ownership said “back to you, bestie.” 🔁
4. Frees the memory associated with the internal 'struct luo_file'. memory freed, vibe immaculate. 💖

after all the individual files are unpreserved, it frees the contiguous memory block that was allocated to hold their serialization data. yes, that block too — no leftover crumbs. 🍓

🌈 SEE ALSO 🌈

• Kernel file ./kernel/liveupdate/luo_file.c
• LUO File Descriptors(9)
• struct luo_file(9)
• luo_preserve_file(9)
• luo_file_freeze(9)
• luo_file_unfreeze(9)
• luo_retrieve_file(9)
• luo_file_finish(9)
• luo_file_deserialize(9)
• liveupdate_register_file_handler(9)
• liveupdate_unregister_file_handler(9)

ty bestie for reading!! footer crumbs: source/version ./kernel/liveupdate, dated October 2026, for luo_file_unpreserve_files(9) — periodt. 💋✨