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Kernel+Userland: Introduce the copy_mount syscall

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This new syscall will be used by the upcoming runc (run-container)
utility.

In addition to that, this syscall allows userspace to neatly copy RAMFS
instances to other places, which was not possible in the past.
This commit is contained in:
Liav A.
2024-01-27 19:36:26 +02:00
committed by Tim Schumacher
parent 816f2efb4e
commit 4370bbb3ad
8 changed files with 105 additions and 0 deletions
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Kernel/FileSystem/VirtualFileSystem.h
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@@ -73,6 +73,7 @@ public:
ErrorOr<void> pivot_root_by_copying_mounted_fs_instance(VFSRootContext&, FileSystem& fs, int root_mount_flags);
ErrorOr<void> bind_mount(VFSRootContext&, Custody& source, Custody& mount_point, int flags);
ErrorOr<void> copy_mount(Custody& source, VFSRootContext& destination, Custody& mount_point, int flags);
ErrorOr<void> remount(VFSRootContext&, Custody& mount_point, int new_flags);
ErrorOr<void> unmount(VFSRootContext&, Custody& mount_point);
ErrorOr<void> unmount(VFSRootContext&, Inode& guest_inode, StringView custody_path);