nilfs_cpfile_change_cpmode(9)

💖 NAME 💖

nilfs_cpfile_change_cpmode — change checkpoint mode. This page is from the Kernel API Manual, and yes bestie, we’re changing a checkpoint mode today. 💅

✨ SYNOPSIS ✨

int nilfs_cpfile_change_cpmode (struct inode *cpfile , __u64 cno , int
       mode );

🎀 ARGUMENTS 🎀

• cpfile — inode of checkpoint file 🗂️
• cno — checkpoint number 🔢
• mode — mode of checkpoint 🎛️

💅 DESCRIPTION 💅

okay so nilfs_change_cpmode changes the mode of the checkpoint specified by cno. (Not me clocking that the name in this sentence is nilfs_change_cpmode while the page title is nilfs_cpfile_change_cpmode — I’m just relaying the lore, don’t shoot the messenger 😭💀.)

The mode value is NILFS_CHECKPOINT or NILFS_SNAPSHOT. That’s the whole vibe check: checkpoint mode in, checkpoint mode changed. ✨

🔥 RETURN 🔥

0 on success, or one of the following negative error codes on failure:

• -EIO — I/O error (including metadata corruption). 💀
• -ENOENT — No such checkpoint. 🙈
• -ENOMEM — Insufficient memory available. 😭

🦋 SEE ALSO 🦋

Kernel file ./fs/nilfs2/cpfile.c and these iconic little references, all of them, no cap:

• nilfs_cpfile_checkpoint_offset(9)
• nilfs_cpfile_cp_snapshot_list_offset(9)
• nilfs_cpfile_ch_snapshot_list_offset(9)
• nilfs_cpfile_find_checkpoint_block(9)
• nilfs_cpfile_read_checkpoint(9)
• nilfs_cpfile_create_checkpoint(9)
• nilfs_cpfile_finalize_checkpoint(9)
• nilfs_cpfile_delete_checkpoints(9)
• nilfs_cpfile_get_cpinfo(9)
• nilfs_cpfile_delete_checkpoint(9)
• nilfs_cpfile_is_snapshot(9)
• nilfs_cpfile_get_stat(9)
• nilfs_cpfile_read(9)

that’s the whole page, bestie — source stamp ./fs/nilfs2, date October 2026, for nilfs_cpfile_change_cpmode(9). go forth and change those checkpoint modes responsibly 🫶💖🌈