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lib/protocol, lib/model: Implement high precision time stamps (fixes #3305)

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This adds a new nanoseconds field to the FileInfo, populates it during
scans and sets the non-truncated time in Chtimes calls.

The actual file modification time is defined as modified_s seconds +
modified_ns nanoseconds. It's expected that the modified_ns field is <=
1e9 (that is, all whole seconds should go in the modified_s field) but
not really enforced. Given that it's an int32 the timestamp can be
adjusted += ~2.9 seconds by the modified_ns field...

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3431
This commit is contained in:
Jakob Borg
2016-08-06 13:05:59 +00:00
committed by Audrius Butkevicius
parent 0655991a19
commit ea87bcefd6
21 changed files with 321 additions and 240 deletions
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10
lib/model/rwfolder.go
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@@ -449,7 +449,7 @@ func (f *rwFolder) pullerIteration(ignores *ignore.Matcher) int {
devices := folderFiles.Availability(file.Name)
for _, dev := range devices {
if f.model.ConnectedTo(dev) {
f.queue.Push(file.Name, file.Size, file.Modified)
f.queue.Push(file.Name, file.Size, file.ModTime())
changed++
break
}
@@ -925,7 +925,7 @@ func (f *rwFolder) handleFile(file protocol.FileInfo, copyChan chan<- copyBlocks
// changes that we don't know about yet and we should scan before
// touching the file. If we can't stat the file we'll just pull it.
if info, err := f.mtimeFS.Lstat(realName); err == nil {
if info.ModTime().Unix() != curFile.Modified || info.Size() != curFile.Size {
if !info.ModTime().Equal(curFile.ModTime()) || info.Size() != curFile.Size {
l.Debugln("file modified but not rescanned; not pulling:", realName)
// Scan() is synchronous (i.e. blocks until the scan is
// completed and returns an error), but a scan can't happen
@@ -1044,8 +1044,7 @@ func (f *rwFolder) shortcutFile(file protocol.FileInfo) error {
}
}
t := time.Unix(file.Modified, 0)
f.mtimeFS.Chtimes(realName, t, t) // never fails
f.mtimeFS.Chtimes(realName, file.ModTime(), file.ModTime()) // never fails
// This may have been a conflict. We should merge the version vectors so
// that our clock doesn't move backwards.
@@ -1247,8 +1246,7 @@ func (f *rwFolder) performFinish(state *sharedPullerState) error {
}
// Set the correct timestamp on the new file
t := time.Unix(state.file.Modified, 0)
f.mtimeFS.Chtimes(state.tempName, t, t) // never fails
f.mtimeFS.Chtimes(state.tempName, state.file.ModTime(), state.file.ModTime()) // never fails
if stat, err := f.mtimeFS.Lstat(state.realName); err == nil {
// There is an old file or directory already in place. We need to