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   mount_namespaces    ( 7 )

обзор пространств имен монтирования Linux (overview of Linux mount namespaces)

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Описание (Description)

For an overview of namespaces, see namespaces(7).

Mount namespaces provide isolation of the list of mounts seen by the processes in each namespace instance. Thus, the processes in each of the mount namespace instances will see distinct single- directory hierarchies.

The views provided by the /proc/[pid]/mounts, /proc/[pid]/mountinfo, and /proc/[pid]/mountstats files (all described in proc(5)) correspond to the mount namespace in which the process with the PID [pid] resides. (All of the processes that reside in the same mount namespace will see the same view in these files.)

A new mount namespace is created using either clone(2) or unshare(2) with the CLONE_NEWNS flag. When a new mount namespace is created, its mount list is initialized as follows:

* If the namespace is created using clone(2), the mount list of the child's namespace is a copy of the mount list in the parent process's mount namespace.

* If the namespace is created using unshare(2), the mount list of the new namespace is a copy of the mount list in the caller's previous mount namespace.

Subsequent modifications to the mount list (mount(2) and umount(2)) in either mount namespace will not (by default) affect the mount list seen in the other namespace (but see the following discussion of shared subtrees).