i_gid_into_vfsgid(9)

✨ NAME ✨

okay so bestie, this is i_gid_into_vfsgid(9) from the Kernel API Manual, and it is literally here to map an inode's i_gid down according to an idmapping. that's the whole vibe 💅

💻 SYNOPSIS 💻

vfsgid_t i_gid_into_vfsgid (struct mnt_idmap *idmap , const struct inode
       *inode );

🎀 ARGUMENTS 🎀

• idmap — the idmap of the mount the inode was found from, periodt ✨
• inode — the inode to map, obviously 🫶

🌸 RETURN 🌸

you get the inode’s i_gid mapped down according to idmap. and if the inode’s i_gid has no mapping, INVALID_VFSGID is returned — no cap, that's the rule 😭

🦋 SEE ALSO 🦋

Kernel file ./include/linux/fs.h and honestly the whole friend group:

• enum positive_aop_returns(9)
• struct address_space(9)
• struct file_ra_state(9)
• struct file(9)
• i_uid_into_vfsuid(9)
• i_uid_needs_update(9)
• i_uid_update(9)
• i_gid_needs_update(9)
• i_gid_update(9)
• inode_fsuid_set(9)
• inode_fsgid_set(9)
• fsuidgid_has_mapping(9)
• inode_set_ctime(9)
• file_write_started(9)
• file_write_not_started(9)
• struct renamedata(9)
• is_mgtime(9)
• iput_if_not_last(9)
• is_idmapped_mnt(9)
• file_start_write(9)
• file_end_write(9)
• kiocb_start_write(9)
• kiocb_end_write(9)
• name_is_dot_dotdot(9)
• name_contains_dotdot(9)
• inode_dio_begin(9)
• inode_dio_end(9)
• generic_ci_validate_strict_name(9)

okay bye bestie, this page came from ./include/linux and it's dated October 2026 — source/version and date noted, mwah 💋💖