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Kernel: Support F_SETLKW in fcntl

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Idan Horowitz 2022-07-14 02:17:01 +03:00 • committed by Andreas Kling
parent 9db10887a1
commit 3a80b25ed6
7 changed files with 133 additions and 29 deletions
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13
Kernel/FileSystem/Inode.h
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@ -22,6 +22,11 @@
namespace Kernel {
enum class ShouldBlock {
No = 0,
Yes = 1
};
class Inode : public ListedRefCounted<Inode, LockType::Spinlock>
, public Weakable<Inode> {
friend class VirtualFileSystem;
@ -94,10 +99,11 @@ public:
ErrorOr<NonnullRefPtr<FIFO>> fifo();
ErrorOr<void> can_apply_flock(OpenFileDescription const&, flock const&) const;
ErrorOr<void> apply_flock(Process const&, OpenFileDescription const&, Userspace<flock const*>);
bool can_apply_flock(flock const&) const;
ErrorOr<void> apply_flock(Process const&, OpenFileDescription const&, Userspace<flock const*>, ShouldBlock);
ErrorOr<void> get_flock(OpenFileDescription const&, Userspace<flock*>) const;
void remove_flocks_for_description(OpenFileDescription const&);
Thread::FlockBlockerSet& flock_blocker_set() { return m_flock_blocker_set; };
protected:
Inode(FileSystem&, InodeIndex);
@ -112,6 +118,8 @@ protected:
mutable Mutex m_inode_lock { "Inode"sv };
private:
ErrorOr<bool> try_apply_flock(Process const&, OpenFileDescription const&, flock const&);
FileSystem& m_file_system;
InodeIndex m_index { 0 };
WeakPtr<Memory::SharedInodeVMObject> m_shared_vmobject;
@ -129,6 +137,7 @@ private:
short type;
};
Thread::FlockBlockerSet m_flock_blocker_set;
SpinlockProtected<Vector<Flock>> m_flocks;
public: