Ejemplo n.º 1
0
// Returns true if there is a failure due to missing computed files.
func (sub *Sub) buildUpdateRequest(image *image.Image,
	request *subproto.UpdateRequest, deleteMissingComputedFiles bool,
	logger *log.Logger) bool {
	sub.requiredFS = image.FileSystem
	sub.filter = image.Filter
	request.Triggers = image.Triggers
	sub.requiredInodeToSubInode = make(map[uint64]uint64)
	sub.inodesChanged = make(map[uint64]bool)
	sub.inodesCreated = make(map[uint64]string)
	sub.subObjectCacheUsage = make(map[hash.Hash]uint64, len(sub.ObjectCache))
	// Populate subObjectCacheUsage.
	for _, hash := range sub.ObjectCache {
		sub.subObjectCacheUsage[hash] = 0
	}
	if !filesystem.CompareDirectoriesMetadata(&sub.FileSystem.DirectoryInode,
		&sub.requiredFS.DirectoryInode, nil) {
		makeDirectory(request, &sub.requiredFS.DirectoryInode, "/", false)
	}
	if sub.compareDirectories(request,
		&sub.FileSystem.DirectoryInode, &sub.requiredFS.DirectoryInode,
		"/", deleteMissingComputedFiles, logger) {
		return true
	}
	// Look for multiply used objects and tell the sub.
	for obj, useCount := range sub.subObjectCacheUsage {
		if useCount > 1 {
			if request.MultiplyUsedObjects == nil {
				request.MultiplyUsedObjects = make(map[hash.Hash]uint64)
			}
			request.MultiplyUsedObjects[obj] = useCount
		}
	}
	return false
}
Ejemplo n.º 2
0
func addDirectory(dirent, oldDirent *filesystem.DirectoryEntry,
	fileSystem, oldFS *FileSystem,
	directoryPathName string, stat *syscall.Stat_t) error {
	myPathName := path.Join(directoryPathName, dirent.Name)
	if stat.Ino == fileSystem.inodeNumber {
		return errors.New("Recursive directory: " + myPathName)
	}
	if _, ok := fileSystem.InodeTable[stat.Ino]; ok {
		return errors.New("Hardlinked directory: " + myPathName)
	}
	inode := new(filesystem.DirectoryInode)
	dirent.SetInode(inode)
	fileSystem.InodeTable[stat.Ino] = inode
	inode.Mode = filesystem.FileMode(stat.Mode)
	inode.Uid = stat.Uid
	inode.Gid = stat.Gid
	var oldInode *filesystem.DirectoryInode
	if oldDirent != nil {
		if oi, ok := oldDirent.Inode().(*filesystem.DirectoryInode); ok {
			oldInode = oi
		}
	}
	err, copied := scanDirectory(inode, oldInode, fileSystem, oldFS, myPathName)
	if err != nil {
		return err
	}
	if copied && filesystem.CompareDirectoriesMetadata(inode, oldInode, nil) {
		dirent.SetInode(oldInode)
		fileSystem.InodeTable[stat.Ino] = oldInode
	}
	fileSystem.DirectoryCount++
	return nil
}
Ejemplo n.º 3
0
func compareDirectories(request *subproto.UpdateRequest, state *state,
	subDirectory, requiredDirectory *filesystem.Directory,
	parentName string, filter *filter.Filter) {
	requiredPathName := path.Join(parentName, requiredDirectory.Name)
	// First look for entries that should be deleted.
	makeSubDirectory := false
	if subDirectory == nil {
		makeSubDirectory = true
	} else {
		subPathName := path.Join(parentName, subDirectory.Name)
		for name, subEntry := range subDirectory.EntriesByName {
			pathname := path.Join(subPathName, entryName(subEntry))
			if filter.Match(pathname) {
				continue
			}
			if _, ok := requiredDirectory.EntriesByName[name]; !ok {
				request.PathsToDelete = append(request.PathsToDelete, pathname)
				fmt.Printf("Delete: %s\n", pathname) // HACK
			}
		}
		if !filesystem.CompareDirectoriesMetadata(subDirectory,
			requiredDirectory, os.Stdout) {
			fmt.Printf("Different directory: %s...\n", requiredPathName) // HACK
			makeSubDirectory = true
			// TODO(rgooch): Update metadata.
		}
	}
	if makeSubDirectory {
		var newdir subproto.Directory
		newdir.Name = requiredPathName
		newdir.Mode = requiredDirectory.Mode
		newdir.Uid = requiredDirectory.Uid
		newdir.Gid = requiredDirectory.Gid
		request.DirectoriesToMake = append(request.DirectoriesToMake, newdir)
	}
	for name, requiredEntry := range requiredDirectory.EntriesByName {
		pathname := path.Join(requiredPathName, entryName(requiredEntry))
		if filter.Match(pathname) {
			continue
		}
		if subDirectory == nil {
			compareEntries(request, state, nil, requiredEntry, requiredPathName,
				filter)
		} else {
			if subEntry, ok := subDirectory.EntriesByName[name]; ok {
				compareEntries(request, state, subEntry, requiredEntry,
					requiredPathName, filter)
			} else {
				compareEntries(request, state, nil, requiredEntry,
					requiredPathName, filter)
			}
		}
	}
}