示例#1
0
// reiserfs_read
static status_t
reiserfs_read(fs_volume *fs, fs_vnode *_node, void *cookie, off_t pos,
	void *buffer, size_t *bufferSize)
{
	TOUCH(fs);
//	FUNCTION_START();
//	Volume *volume = (Volume*)fs->private_volume;
	VNode *node = (VNode*)_node->private_node;
	FUNCTION(("((%Ld: %lu, %lu), %Ld, %p, %lu)\n", node->GetID(),
			  node->GetDirID(), node->GetObjectID(), pos, buffer,
			  *bufferSize));
	status_t error = B_OK;
	// don't read anything but files
	if (!node->IsFile()) {
		if (node->IsDir())
			error = B_IS_A_DIRECTORY;
		else
			error = B_BAD_VALUE;
	}

	// read
	StreamReader *reader = (StreamReader*)cookie;
	if (error == B_OK) {
		error = reader->Resume();
		if (error == B_OK) {
			error = reader->ReadAt(pos, buffer, *bufferSize, bufferSize);
			reader->Suspend();
		}
	}
	RETURN_ERROR(error);
}
示例#2
0
// reiserfs_lookup
static status_t
reiserfs_lookup(fs_volume* fs, fs_vnode* _dir, const char *entryName,
	ino_t *vnid)
{
//	FUNCTION_START();
	Volume *volume = (Volume*)fs->private_volume;
	VNode *dir = (VNode*)_dir->private_node;
FUNCTION(("dir: (%Ld: %lu, %lu), entry: `%s'\n", dir->GetID(), dir->GetDirID(),
		  dir->GetObjectID(), entryName));
	status_t error = B_OK;
	VNode *entryNode = NULL;

	// check for non-directories
	if (!dir->IsDir()) {
		error = B_ENTRY_NOT_FOUND;

	// special entries: "." and ".."
	} else if (!strcmp(entryName, ".")) {
		*vnid = dir->GetID();
		if (volume->GetVNode(*vnid, &entryNode) != B_OK)
			error = B_BAD_VALUE;
	} else if (!strcmp(entryName, "..")) {
		*vnid = dir->GetParentID();
		if (volume->GetVNode(*vnid, &entryNode) != B_OK)
			error = B_BAD_VALUE;

	// ordinary entries
	} else {
		// find the entry
		VNode foundNode;
		error = volume->FindDirEntry(dir, entryName, &foundNode, true);

		// hide non-file/dir/symlink entries, if the user desires that, and
		// those entries explicitly set to hidden
		if (error == B_OK
			&& ((foundNode.IsEsoteric() && volume->GetHideEsoteric())
				|| volume->IsNegativeEntry(foundNode.GetID()))) {
			error = B_ENTRY_NOT_FOUND;
		}
		if (error == B_OK) {
			*vnid = foundNode.GetID();
			error = volume->GetVNode(*vnid, &entryNode);
		}
	}

	// add to the entry cache
	if (error == B_OK) {
		entry_cache_add(volume->GetID(), dir->GetID(), entryName,
			*vnid);
	}

	RETURN_ERROR(error);
}
示例#3
0
// reiserfs_open_dir
static status_t
reiserfs_open_dir(fs_volume *fs, fs_vnode *_node, void **cookie)
{
//	FUNCTION_START();
	Volume *volume = (Volume*)fs->private_volume;
	VNode *node = (VNode*)_node->private_node;
FUNCTION(("node: (%Ld: %lu, %lu)\n", node->GetID(), node->GetDirID(),
		  node->GetObjectID()));
	status_t error = (node->IsDir() ? B_OK : B_NOT_A_DIRECTORY);
	if (error == B_OK) {
		DirectoryCookie *iterator = new(nothrow) DirectoryCookie(
			volume->GetTree(), node->GetDirID(), node->GetObjectID());
		if (iterator) {
			error = iterator->Suspend();
			if (error == B_OK)
				*cookie = iterator;
			else
				delete iterator;
		} else
			error = B_NO_MEMORY;
	}
	FUNCTION_END();
	RETURN_ERROR(error);
}