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Merge branch 'master' into no-manifests

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This commit is contained in:
Eelco Dolstra 2012-08-27 11:09:07 -04:00
commit e94806d030
20 changed files with 325 additions and 139 deletions
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32
src/libstore/gc.cc
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@ -425,10 +425,9 @@ bool LocalStore::isActiveTempFile(const GCState & state,
void LocalStore::deleteGarbage(GCState & state, const Path & path)
{
printMsg(lvlInfo, format("deleting `%1%'") % path);
unsigned long long bytesFreed, blocksFreed;
deletePathWrapped(path, bytesFreed, blocksFreed);
unsigned long long bytesFreed;
deletePathWrapped(path, bytesFreed);
state.results.bytesFreed += bytesFreed;
state.results.blocksFreed += blocksFreed;
}
@ -550,7 +549,7 @@ bool LocalStore::tryToDelete(GCState & state, const Path & path)
} else
deleteGarbage(state, path);
if (state.options.maxFreed && state.results.bytesFreed + state.bytesInvalidated > state.options.maxFreed) {
if (state.results.bytesFreed + state.bytesInvalidated > state.options.maxFreed) {
printMsg(lvlInfo, format("deleted or invalidated more than %1% bytes; stopping") % state.options.maxFreed);
throw GCLimitReached();
}
@ -576,11 +575,13 @@ bool LocalStore::tryToDelete(GCState & state, const Path & path)
safely deleted. FIXME: race condition with optimisePath(): we
might see a link count of 1 just before optimisePath() increases
the link count. */
void LocalStore::removeUnusedLinks()
void LocalStore::removeUnusedLinks(const GCState & state)
{
AutoCloseDir dir = opendir(linksDir.c_str());
if (!dir) throw SysError(format("opening directory `%1%'") % linksDir);
long long actualSize = 0, unsharedSize = 0;
struct dirent * dirent;
while (errno = 0, dirent = readdir(dir)) {
checkInterrupt();
@ -592,13 +593,28 @@ void LocalStore::removeUnusedLinks()
if (lstat(path.c_str(), &st) == -1)
throw SysError(format("statting `%1%'") % path);
if (st.st_nlink != 1) continue;
if (st.st_nlink != 1) {
unsigned long long size = st.st_blocks * 512ULL;
actualSize += size;
unsharedSize += (st.st_nlink - 1) * size;
continue;
}
printMsg(lvlTalkative, format("deleting unused link `%1%'") % path);
if (unlink(path.c_str()) == -1)
throw SysError(format("deleting `%1%'") % path);
state.results.bytesFreed += st.st_blocks * 512;
}
struct stat st;
if (stat(linksDir.c_str(), &st) == -1)
throw SysError(format("statting `%1%'") % linksDir);
long long overhead = st.st_blocks * 512ULL;
printMsg(lvlInfo, format("note: currently hard linking saves %.2f MiB")
% ((unsharedSize - actualSize - overhead) / (1024.0 * 1024.0)));
}
@ -660,7 +676,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
throw Error(format("cannot delete path `%1%' since it is still alive") % *i);
}
} else {
} else if (options.maxFreed > 0) {
if (shouldDelete(state.options.action))
printMsg(lvlError, format("deleting garbage..."));
@ -718,7 +734,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
/* Clean up the links directory. */
printMsg(lvlError, format("deleting unused links..."));
removeUnusedLinks();
removeUnusedLinks(state);
}