attach_mnt(9)

✨ attach_mnt(9) ✨

okay so this is a page from the Kernel API Manual bestie, and it's about attach_mnt — the little function that's literally the moment a mount gets introduced to its new family 💅

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🎀 NAME 🎀

attach_mnt — mount a mount, attach to @mount_hashtable and parent's list of child mounts

like yes she does both, she's an overachiever, we love that for her 🫶

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🌸 SYNOPSIS 🌸

void attach_mnt (struct mount *mnt , struct mount *parent , struct mountpoint *mp );

no cap, that's the whole signature ✨

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🦋 ARGUMENTS 🦋

• mnt — the new mount 💖 the fresh baby that's about to get attached
• parent — the parent 🌈 the one she's moving in with
• mp — the new mountpoint 🎯 the exact spot she's gonna live in

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🧚 DESCRIPTION 🧚

So here's the tea: this function mounts mnt at mp on parent. Then it attaches mnt to parent's child mount list and to mount_hashtable. Two social circles, one function, main character energy fr fr 👑

heads up bestie 📌 — note that when make_visible is called, mnt->mnt_parent already points to the correct parent. so like, that part's already handled, don't come for her 💀

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🔥 CONTEXT 🔥

This function expects namespace_lock and lock_mount_hash to have been acquired in that order. in. that. order. 👏 don't flip them, don't get cute with it, the order is the whole vibe check 😭

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⭐ SEE ALSO ⭐

Kernel file ./fs/namespace.c, plus the whole friend group 💜

• mnt_get_write_access(9)
• mnt_want_write(9)
• mnt_get_write_access_file(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)
• 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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and that's the page!! 💖✨ this lil guy lives over in ./fs and this version is dated October 2026 — go off, king 🎀🌸🦋 iykyk 💅