DragonOS/docs/locales/en/kernel/container/namespaces/mnt_namespace.md

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Mount Namespace

Underlying Architecture

pcb -> nsproxy -> mnt_namespace

Each mounted file system has its own independent mount point, which is represented in the data structure as a red-black tree of mounts. Each namespace has its own independent mounts, so mounting and unmounting file systems will not affect others.

System Call Interface

• clone
  • CLONE_NEWNS is used to create a new MNT namespace. It provides an independent file system mount point.
• unshare
  • After calling unshare() with the CLONE_NEWPID flag, all subsequent child processes will run in the new namespace.
• setns
  • Adds the process to the specified namespace.
• chroot
  • Changes the current process's root directory to the specified path, providing file system isolation.