C++ Inode::IsFile方法代码示例

static status_t
btrfs_read(fs_volume* _volume, fs_vnode* _node, void* _cookie, off_t pos,
	void* buffer, size_t* _length)
{
	Inode* inode = (Inode*)_node->private_node;

	if (!inode->IsFile()) {
		*_length = 0;
		return inode->IsDirectory() ? B_IS_A_DIRECTORY : B_BAD_VALUE;
	}

	return inode->ReadAt(pos, (uint8*)buffer, _length);
}

static status_t
btrfs_open_attr_dir(fs_volume *_volume, fs_vnode *_node, void **_cookie)
{
	Inode* inode = (Inode*)_node->private_node;
	TRACE("%s()\n", __FUNCTION__);

	// on directories too ?
	if (!inode->IsFile())
		return EINVAL;

	AttributeIterator* iterator = new(std::nothrow) AttributeIterator(inode);
	if (iterator == NULL || iterator->InitCheck() != B_OK) {
		delete iterator;
		return B_NO_MEMORY;
	}

	*_cookie = iterator;
	return B_OK;
}

static status_t
ext2_open_attr_dir(fs_volume *_volume, fs_vnode *_node, void **_cookie)
{
	Inode* inode = (Inode*)_node->private_node;
	Volume* volume = (Volume*)_volume->private_volume;
	TRACE("%s()\n", __FUNCTION__);

	if (!(volume->SuperBlock().CompatibleFeatures() & EXT2_FEATURE_EXT_ATTR))
		return ENOSYS;

	// on directories too ?
	if (!inode->IsFile())
		return EINVAL;

	int32 *index = new(std::nothrow) int32;
	if (index == NULL)
		return B_NO_MEMORY;
	*index = 0;
	*(int32**)_cookie = index;
	return B_OK;
}

//.........这里部分代码省略.........
		return status;
	}

	if (entries != NULL) {
		size_t nameLength = strlen(name);
		status = entries->AddEntry(transaction, name, nameLength, id, type);
		if (status != B_OK) {
			ERROR("Inode::Create(): AddEntry() failed\n");
			return status;
		}
	}

	TRACE("Inode::Create(): Creating inode\n");
	Inode* inode = new(std::nothrow) Inode(volume);
	if (inode == NULL)
		return B_NO_MEMORY;

	TRACE("Inode::Create(): Getting node structure\n");
	ext2_inode& node = inode->Node();
	TRACE("Inode::Create(): Initializing inode data\n");
	memset(&node, 0, sizeof(ext2_inode));
	node.SetMode(mode);
	node.SetUserID(geteuid());
	node.SetGroupID(parent != NULL ? parent->Node().GroupID() : getegid());
	node.SetNumLinks(inode->IsDirectory() ? 2 : 1);
	TRACE("Inode::Create(): Updating time\n");
	struct timespec timespec;
	_BigtimeToTimespec(real_time_clock_usecs(), &timespec);
	inode->SetAccessTime(&timespec);
	inode->SetCreationTime(&timespec);
	inode->SetModificationTime(&timespec);
	node.SetFlags(parent->Flags() & EXT2_INODE_INHERITED);
	if (volume->HasExtentsFeature() 
		&& (inode->IsDirectory() || inode->IsFile())) {
		node.SetFlag(EXT2_INODE_EXTENTS);
		ExtentStream stream(volume, &node.extent_stream, 0);
		stream.Init();
		ASSERT(stream.Check());
	}

	if (sizeof(ext2_inode) < volume->InodeSize())
		node.SetExtraInodeSize(sizeof(ext2_inode) - EXT2_INODE_NORMAL_SIZE);

	TRACE("Inode::Create(): Updating ID\n");
	inode->fID = id;

	if (inode->IsDirectory()) {
		TRACE("Inode::Create(): Initializing directory\n");
		status = inode->InitDirectory(transaction, parent);
		if (status != B_OK) {
			ERROR("Inode::Create(): InitDirectory() failed\n");
			delete inode;
			return status;
		}
	}

	// TODO: Maybe it can be better
	/*if (volume->HasExtendedAttributes()) {
		TRACE("Inode::Create(): Initializing extended attributes\n");
		uint32 blockGroup = 0;
		uint32 pos = 0;
		uint32 allocated;

		status = volume->AllocateBlocks(transaction, 1, 1, blockGroup, pos,
			allocated);
		if (status != B_OK)

status_t
ext2_write_stat(fs_volume* _volume, fs_vnode* _node, const struct stat* stat,
	uint32 mask)
{
	TRACE("ext2_write_stat\n");
	Volume* volume = (Volume*)_volume->private_volume;

	if (volume->IsReadOnly())
		return B_READ_ONLY_DEVICE;

	Inode* inode = (Inode*)_node->private_node;

	ext2_inode& node = inode->Node();
	bool updateTime = false;
	uid_t uid = geteuid();

	bool isOwnerOrRoot = uid == 0 || uid == (uid_t)node.UserID();
	bool hasWriteAccess = inode->CheckPermissions(W_OK) == B_OK;

	TRACE("ext2_write_stat: Starting transaction\n");
	Transaction transaction(volume->GetJournal());
	inode->WriteLockInTransaction(transaction);

	if ((mask & B_STAT_SIZE) != 0 && inode->Size() != stat->st_size) {
		if (inode->IsDirectory())
			return B_IS_A_DIRECTORY;
		if (!inode->IsFile())
			return B_BAD_VALUE;
		if (!hasWriteAccess)
			return B_NOT_ALLOWED;

		TRACE("ext2_write_stat: Old size: %ld, new size: %ld\n",
			(long)inode->Size(), (long)stat->st_size);

		off_t oldSize = inode->Size();

		status_t status = inode->Resize(transaction, stat->st_size);
		if(status != B_OK)
			return status;

		if ((mask & B_STAT_SIZE_INSECURE) == 0) {
			rw_lock_write_unlock(inode->Lock());
			inode->FillGapWithZeros(oldSize, inode->Size());
			rw_lock_write_lock(inode->Lock());
		}

		updateTime = true;
	}

	if ((mask & B_STAT_MODE) != 0) {
		// only the user or root can do that
		if (!isOwnerOrRoot)
			return B_NOT_ALLOWED;
		node.UpdateMode(stat->st_mode, S_IUMSK);
		updateTime = true;
	}

	if ((mask & B_STAT_UID) != 0) {
		// only root should be allowed
		if (uid != 0)
			return B_NOT_ALLOWED;
		node.SetUserID(stat->st_uid);
		updateTime = true;
	}

	if ((mask & B_STAT_GID) != 0) {
		// only the user or root can do that
		if (!isOwnerOrRoot)
			return B_NOT_ALLOWED;
		node.SetGroupID(stat->st_gid);
		updateTime = true;
	}

	if ((mask & B_STAT_MODIFICATION_TIME) != 0 || updateTime
		|| (mask & B_STAT_CHANGE_TIME) != 0) {
		// the user or root can do that or any user with write access
		if (!isOwnerOrRoot && !hasWriteAccess)
			return B_NOT_ALLOWED;
		struct timespec newTimespec = { 0, 0};

		if ((mask & B_STAT_MODIFICATION_TIME) != 0)
			newTimespec = stat->st_mtim;

		if ((mask & B_STAT_CHANGE_TIME) != 0
			&& stat->st_ctim.tv_sec > newTimespec.tv_sec)
			newTimespec = stat->st_ctim;

		if (newTimespec.tv_sec == 0)
			Inode::_BigtimeToTimespec(real_time_clock_usecs(), &newTimespec);

		inode->SetModificationTime(&newTimespec);
	}
	if ((mask & B_STAT_CREATION_TIME) != 0) {
		// the user or root can do that or any user with write access
		if (!isOwnerOrRoot && !hasWriteAccess)
			return B_NOT_ALLOWED;
		inode->SetCreationTime(&stat->st_crtim);
	}

	status_t status = inode->WriteBack(transaction);
//.........这里部分代码省略.........