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#include <AK/NonnullRefPtrVector.h>
#include <AK/StringBuilder.h>
#include <Kernel/FileSystem/Inode.h>
#include <Kernel/FileSystem/InodeWatcher.h>
#include <Kernel/Net/LocalSocket.h>
#include <Kernel/VM/InodeVMObject.h>
InlineLinkedList<Inode>& all_inodes()
{
static InlineLinkedList<Inode>* list;
if (!list)
list = new InlineLinkedList<Inode>;
return *list;
}
void Inode::sync()
{
NonnullRefPtrVector<Inode, 32> inodes;
{
InterruptDisabler disabler;
for (auto& inode : all_inodes()) {
if (inode.is_metadata_dirty())
inodes.append(inode);
}
}
for (auto& inode : inodes) {
ASSERT(inode.is_metadata_dirty());
inode.flush_metadata();
}
}
ByteBuffer Inode::read_entire(FileDescription* descriptor) const
{
size_t initial_size = metadata().size ? metadata().size : 4096;
StringBuilder builder(initial_size);
ssize_t nread;
u8 buffer[4096];
off_t offset = 0;
for (;;) {
nread = read_bytes(offset, sizeof(buffer), buffer, descriptor);
ASSERT(nread <= (ssize_t)sizeof(buffer));
if (nread <= 0)
break;
builder.append((const char*)buffer, nread);
offset += nread;
}
if (nread < 0) {
kprintf("Inode::read_entire: ERROR: %d\n", nread);
return nullptr;
}
return builder.to_byte_buffer();
}
unsigned Inode::fsid() const
{
return m_fs.fsid();
}
Inode::Inode(FS& fs, unsigned index)
: m_fs(fs)
, m_index(index)
{
all_inodes().append(this);
}
Inode::~Inode()
{
all_inodes().remove(this);
}
void Inode::will_be_destroyed()
{
if (m_metadata_dirty)
flush_metadata();
}
void Inode::inode_contents_changed(off_t offset, ssize_t size, const u8* data)
{
if (m_vmobject)
m_vmobject->inode_contents_changed({}, offset, size, data);
}
void Inode::inode_size_changed(size_t old_size, size_t new_size)
{
if (m_vmobject)
m_vmobject->inode_size_changed({}, old_size, new_size);
}
int Inode::set_atime(time_t)
{
return -ENOTIMPL;
}
int Inode::set_ctime(time_t)
{
return -ENOTIMPL;
}
int Inode::set_mtime(time_t)
{
return -ENOTIMPL;
}
int Inode::increment_link_count()
{
return -ENOTIMPL;
}
int Inode::decrement_link_count()
{
return -ENOTIMPL;
}
void Inode::set_vmo(VMObject& vmo)
{
m_vmobject = vmo.make_weak_ptr();
}
bool Inode::bind_socket(LocalSocket& socket)
{
ASSERT(!m_socket);
m_socket = socket;
return true;
}
bool Inode::unbind_socket()
{
ASSERT(m_socket);
m_socket = nullptr;
return true;
}
void Inode::register_watcher(Badge<InodeWatcher>, InodeWatcher& watcher)
{
LOCKER(m_lock);
ASSERT(!m_watchers.contains(&watcher));
m_watchers.set(&watcher);
}
void Inode::unregister_watcher(Badge<InodeWatcher>, InodeWatcher& watcher)
{
LOCKER(m_lock);
ASSERT(m_watchers.contains(&watcher));
m_watchers.remove(&watcher);
}
void Inode::set_metadata_dirty(bool metadata_dirty)
{
if (m_metadata_dirty == metadata_dirty)
return;
m_metadata_dirty = metadata_dirty;
if (m_metadata_dirty) {
// FIXME: Maybe we should hook into modification events somewhere else, I'm not sure where.
// We don't always end up on this particular code path, for instance when writing to an ext2fs file.
LOCKER(m_lock);
for (auto& watcher : m_watchers) {
watcher->notify_inode_event({}, InodeWatcher::Event::Type::Modified);
}
}
}
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