mnt_get_write_access_file(9)

💅 mnt_get_write_access_file(9) 💅

okay so welcome to the Kernel API Manual page for mnt_get_write_access_file(9) — this is the one about getting write access to a file’s mount, and yes it’s giving very specific kernel bestie energy 🫶

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🎀 NAME 🎀

mnt_get_write_access_file — get write access to a file’s mount ✨

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✨ SYNOPSIS ✨

int mnt_get_write_access_file (struct file *file );

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🌸 ARGUMENTS 🌸

• file — the file whose mount you’re taking a write on. that’s the whole vibe 💅

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🦋 DESCRIPTION 🦋

so this is like mnt_get_write_access, but with a little shortcut: if file is already open for write, it skips incrementing mnt_writers — because the open file already has a reference — and instead it only does the check for emergency r/o remounts 👑

this must be paired with mnt_put_write_access_file, no cap. don’t leave it hanging, bestie 😭

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💖 SEE ALSO 💖

the kernel file is ./fs/namespace.c, and the whole crew is:

• mnt_get_write_access(9)
• mnt_want_write(9)
• mnt_want_write_file(9)
• mnt_put_write_access(9)
• mnt_drop_write(9)
• mnt_hold_writers(9)
• mnt_unhold_writers(9)
• __lookup_mnt(9)
• lookup_mnt(9)
• attach_mnt(9)
• vfs_create_mount(9)
• path_is_mountpoint(9)
• may_umount_tree(9)
• may_umount(9)
• clone_private_mount(9)
• attach_recursive_mnt(9)
• do_lock_mount(9)
• path_overmounted(9)
• can_move_mount_beneath(9)
• mnt_set_expiry(9)
• mnt_allow_writers(9)

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cute little sign-off: source/version is ./fs, date is October 2026, and the page is mnt_get_write_access_file(9) — bye bestie, slay your mounts 💖🦋✨