timestamp_truncate(9)

🎀 NAME 🎀

okay so bestie, meet timestamp_truncate — truncate timespec to a granularity. this is the Kernel API Manual page for it, and yes, we're gonna make it make sense. 💅✨

🦋 SYNOPSIS 🦋

struct timespec64 timestamp_truncate (struct timespec64 t , struct inode
       *inode );

🌸 ARGUMENTS 🌸

• t — a Timespec. literally the time value getting the truncation treatment. 🕰️
• inode — the inode being updated. that's the one whose filesystem is setting the granularity vibe. 🫶

✨ DESCRIPTION ✨

so here's the whole thing: timestamp_truncate truncates a timespec to the granularity supported by the fs containing the inode. Always rounds down — no cap, it does not round up, ever. 👑

and listen: gran must not be 0 nor greater than a second (NSEC_PER_SEC, or 10^9 ns). like, that's the rule. not negotiable. 💀

🔥 SEE ALSO 🔥

• Kernel file ./fs/inode.c
• 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)
• inode_set_ctime_current(9)
• inode_set_ctime_deleg(9)
• in_group_or_capable(9)
• mode_strip_sgid(9)
• dump_inode(9)

mwah 💋 that's the whole page, bestie. source/version vibe: ./fs, dated October 2026, and the man page is timestamp_truncate(9). go forth and truncate responsibly. 👑✨