inode_set_ctime_deleg(9)

🌸 NAME 🌸

Okay so this page is inode_set_ctime_deleg from the Kernel API Manual, and its whole job is to try to update the ctime on a delegated inode. That's it, that's the mission. ✨💖

✨ SYNOPSIS ✨

struct timespec64 inode_set_ctime_deleg (struct inode *inode , struct timespec64 update );

🎀 ARGUMENTS 🎀

• inode — the inode to update. target acquired, bestie 🎯
• update — the timespec64 to set the ctime. slay 💅

💅 DESCRIPTION 💅

The vibe? This function attempts to atomically update the ctime on behalf of a delegation holder. Like, the delegation holder is the main character here, and this is the atomic attempt to update the ctime for them. 🫶

The nfs server can call back the holder of a delegation to get updated inode attributes, including the mtime. When it's updating the mtime, it updates the ctime to a value at least equal to that. No cap, that's the rule. 🌈

This can race with concurrent updates to the inode — and if that happens, the update is skipped. 💀 Just skipped. Periodt.

Tiny but important note: this works even when multigrain timestamps are not enabled, so it is used in either case. versatile icon behavior 🧚

🦋 SEE ALSO 🦋

Kernel file ./fs/inode.c plus this whole bestie group chat of inode functions:

• inode_init_always_gfp(9)
• alloc_inode(9)
• drop_nlink(9)
• clear_nlink(9)
• set_nlink(9)
• inc_nlink(9)
• inode_sb_list_add(9)
• __insert_inode_hash(9)
• __remove_inode_hash(9)
• evict_inodes(9)
• new_inode(9)
• unlock_new_inode(9)
• lock_two_nondirectories(9)
• unlock_two_nondirectories(9)
• inode_insert5(9)
• iget5_locked(9)
• iget5_locked_rcu(9)
• iget_locked(9)
• iunique(9)
• ihold(9)
• ilookup5_nowait(9)
• ilookup5(9)
• ilookup(9)
• find_inode_nowait(9)
• find_inode_rcu(9)
• find_inode_by_ino_rcu(9)
• iput(9)
• iput_not_last(9)
• bmap(9)
• inode_update_time(9)
• generic_update_time(9)
• atime_needs_update(9)
• file_remove_privs(9)
• current_time(9)
• file_update_time(9)
• file_modified_flags(9)
• file_modified(9)
• kiocb_modified(9)
• inode_init_owner(9)
• inode_owner_or_capable(9)
• inode_dio_wait(9)
• timestamp_truncate(9)
• inode_set_ctime_current(9)
• in_group_or_capable(9)
• mode_strip_sgid(9)
• dump_inode(9)

Bye bestie 🫶 — this page comes from source ./fs, dated October 2026, and the page name is inode_set_ctime_deleg(9) 💖