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Kernel+Userland: Prepare for considering VFSRootContext when mounting

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Expose some initial interfaces in the mount-related syscalls to select
the desired VFSRootContext, by specifying the VFSRootContext index
number.

For now there's still no way to create a different VFSRootContext, so
the only valid IDs are -1 (for currently attached VFSRootContext) or 1
for the first userspace VFSRootContext.
This commit is contained in:
Liav A.
2024-01-26 15:38:47 +02:00
committed by Tim Schumacher
parent 01e1af732b
commit 91c87c5b77
13 changed files with 144 additions and 53 deletions
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Kernel/FileSystem/VirtualFileSystem.h
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@@ -67,6 +67,7 @@ public:
SpinlockProtected<IntrusiveList<&FileSystem::m_file_system_node>, LockRank::FileSystem>& all_file_systems_list(Badge<VFSRootContext>) { return m_file_systems_list; }
SpinlockProtected<IntrusiveList<&VFSRootContext::m_list_node>, LockRank::FileSystem>& all_root_contexts_list(Badge<PowerStateSwitchTask>) { return m_root_contexts; }
SpinlockProtected<IntrusiveList<&VFSRootContext::m_list_node>, LockRank::FileSystem>& all_root_contexts_list(Badge<VFSRootContext>) { return m_root_contexts; }
SpinlockProtected<IntrusiveList<&VFSRootContext::m_list_node>, LockRank::FileSystem>& all_root_contexts_list(Badge<Process>) { return m_root_contexts; }
ErrorOr<void> mount(VFSRootContext&, MountFile&, OpenFileDescription*, Custody& mount_point, int flags);
ErrorOr<void> pivot_root_by_copying_mounted_fs_instance(VFSRootContext&, FileSystem& fs, int root_mount_flags);