// 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
}
// Returns true if no update needs to be performed.
func (sub *Sub) buildUpdateRequest(request *subproto.UpdateRequest) bool {
var state state
state.subFS = &sub.fileSystem.FileSystem
requiredImage := sub.herd.getImage(sub.requiredImage)
state.requiredFS = requiredImage.FileSystem
filter := requiredImage.Filter
request.Triggers = requiredImage.Triggers
state.requiredInodeToSubInode = make(map[uint64]uint64)
state.inodesChanged = make(map[uint64]bool)
state.inodesCreated = make(map[uint64]string)
state.subObjectCacheUsage = make(map[hash.Hash]uint64,
len(sub.fileSystem.ObjectCache))
var rusageStart, rusageStop syscall.Rusage
syscall.Getrusage(syscall.RUSAGE_SELF, &rusageStart)
// Populate subObjectCacheUsage.
for _, hash := range sub.fileSystem.ObjectCache {
state.subObjectCacheUsage[hash] = 0
}
compareDirectories(request, &state,
&state.subFS.DirectoryInode, &state.requiredFS.DirectoryInode,
"/", filter)
// Look for multiply used objects and tell the sub.
for obj, useCount := range state.subObjectCacheUsage {
if useCount > 1 {
if request.MultiplyUsedObjects == nil {
request.MultiplyUsedObjects = make(map[hash.Hash]uint64)
}
request.MultiplyUsedObjects[obj] = useCount
}
}
syscall.Getrusage(syscall.RUSAGE_SELF, &rusageStop)
sub.lastComputeUpdateCpuDuration = time.Duration(
rusageStop.Utime.Sec)*time.Second +
time.Duration(rusageStop.Utime.Usec)*time.Microsecond -
time.Duration(rusageStart.Utime.Sec)*time.Second -
time.Duration(rusageStart.Utime.Usec)*time.Microsecond
computeCpuTimeDistribution.Add(sub.lastComputeUpdateCpuDuration)
if len(request.FilesToCopyToCache) > 0 ||
len(request.InodesToMake) > 0 ||
len(request.HardlinksToMake) > 0 ||
len(request.PathsToDelete) > 0 ||
len(request.DirectoriesToMake) > 0 ||
len(request.InodesToChange) > 0 {
sub.herd.logger.Printf(
"buildUpdateRequest(%s) took: %s user CPU time\n",
sub.hostname, sub.lastComputeUpdateCpuDuration)
return false
}
return true
}
