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Kernel: Yet more work on bringing up POSIX SHM.

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This commit is contained in:
Andreas Kling 2019-04-09 02:37:05 +02:00
parent d6ff64db00
commit 60a819c14a
7 changed files with 97 additions and 9 deletions
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18
Kernel/FileSystem/FileDescriptor.cpp
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@ -23,6 +23,11 @@ Retained<FileDescriptor> FileDescriptor::create(RetainPtr<Device>&& device)
return adopt(*new FileDescriptor(move(device)));
}
Retained<FileDescriptor> FileDescriptor::create(RetainPtr<SharedMemory>&& shared_memory)
{
return adopt(*new FileDescriptor(move(shared_memory)));
}
Retained<FileDescriptor> FileDescriptor::create(RetainPtr<Socket>&& socket, SocketRole role)
{
return adopt(*new FileDescriptor(move(socket), role));
@ -48,6 +53,11 @@ FileDescriptor::FileDescriptor(RetainPtr<Device>&& device)
{
}
FileDescriptor::FileDescriptor(RetainPtr<SharedMemory>&& shared_memory)
: m_shared_memory(move(shared_memory))
{
}
FileDescriptor::FileDescriptor(RetainPtr<Socket>&& socket, SocketRole role)
: m_socket(move(socket))
{
@ -397,6 +407,8 @@ bool FileDescriptor::supports_mmap() const
{
if (m_inode)
return true;
if (m_shared_memory)
return true;
if (m_device)
return m_device->is_block_device();
return false;
@ -409,6 +421,12 @@ Region* FileDescriptor::mmap(Process& process, LinearAddress laddr, size_t offse
if (is_block_device())
return static_cast<BlockDevice&>(*m_device).mmap(process, laddr, offset, size);
if (is_shared_memory()) {
if (!shared_memory()->vmo())
return nullptr;
return process.allocate_region_with_vmo(laddr, size, *shared_memory()->vmo(), offset, shared_memory()->name(), true, true);
}
ASSERT(m_inode);
// FIXME: If PROT_EXEC, check that the underlying file system isn't mounted noexec.
String region_name;