diff options
Diffstat (limited to 'src/libstore/gc.cc')
| -rw-r--r-- | src/libstore/gc.cc | 78 |
1 files changed, 39 insertions, 39 deletions
diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc index 406fce672e3b..88b7bec32677 100644 --- a/src/libstore/gc.cc +++ b/src/libstore/gc.cc @@ -34,10 +34,10 @@ static const int defaultGcLevel = 1000; int LocalStore::openGCLock(LockType lockType) { Path fnGCLock = (format("%1%/%2%") - % nixStateDir % gcLockName).str(); - + % settings.nixStateDir % gcLockName).str(); + debug(format("acquiring global GC lock `%1%'") % fnGCLock); - + AutoCloseFD fdGCLock = open(fnGCLock.c_str(), O_RDWR | O_CREAT, 0600); if (fdGCLock == -1) throw SysError(format("opening global GC lock `%1%'") % fnGCLock); @@ -51,7 +51,7 @@ int LocalStore::openGCLock(LockType lockType) /* !!! Restrict read permission on the GC root. Otherwise any process that can open the file for reading can DoS the collector. */ - + return fdGCLock.borrow(); } @@ -85,7 +85,7 @@ void LocalStore::addIndirectRoot(const Path & path) { string hash = printHash32(hashString(htSHA1, path)); Path realRoot = canonPath((format("%1%/%2%/auto/%3%") - % nixStateDir % gcRootsDir % hash).str()); + % settings.nixStateDir % gcRootsDir % hash).str()); createSymlink(realRoot, path); } @@ -113,15 +113,15 @@ Path addPermRoot(StoreAPI & store, const Path & _storePath, else { if (!allowOutsideRootsDir) { - Path rootsDir = canonPath((format("%1%/%2%") % nixStateDir % gcRootsDir).str()); - + Path rootsDir = canonPath((format("%1%/%2%") % settings.nixStateDir % gcRootsDir).str()); + if (string(gcRoot, 0, rootsDir.size() + 1) != rootsDir + "/") throw Error(format( "path `%1%' is not a valid garbage collector root; " "it's not in the directory `%2%'") % gcRoot % rootsDir); } - + createSymlink(gcRoot, storePath); } @@ -130,10 +130,10 @@ Path addPermRoot(StoreAPI & store, const Path & _storePath, Instead of reading all the roots, it would be more efficient to check if the root is in a directory in or linked from the gcroots directory. */ - if (queryBoolSetting("gc-check-reachability", false)) { + if (settings.checkRootReachability) { Roots roots = store.findRoots(); if (roots.find(gcRoot) == roots.end()) - printMsg(lvlError, + printMsg(lvlError, format( "warning: `%1%' is not in a directory where the garbage collector looks for roots; " "therefore, `%2%' might be removed by the garbage collector") @@ -144,7 +144,7 @@ Path addPermRoot(StoreAPI & store, const Path & _storePath, progress. This prevents the set of permanent roots from increasing while a GC is in progress. */ store.syncWithGC(); - + return gcRoot; } @@ -160,23 +160,23 @@ void LocalStore::addTempRoot(const Path & path) if (fdTempRoots == -1) { while (1) { - Path dir = (format("%1%/%2%") % nixStateDir % tempRootsDir).str(); + Path dir = (format("%1%/%2%") % settings.nixStateDir % tempRootsDir).str(); createDirs(dir); - + fnTempRoots = (format("%1%/%2%") % dir % getpid()).str(); AutoCloseFD fdGCLock = openGCLock(ltRead); - + if (pathExists(fnTempRoots)) /* It *must* be stale, since there can be no two processes with the same pid. */ unlink(fnTempRoots.c_str()); - fdTempRoots = openLockFile(fnTempRoots, true); + fdTempRoots = openLockFile(fnTempRoots, true); fdGCLock.close(); - + debug(format("acquiring read lock on `%1%'") % fnTempRoots); lockFile(fdTempRoots, ltRead, true); @@ -186,7 +186,7 @@ void LocalStore::addTempRoot(const Path & path) if (fstat(fdTempRoots, &st) == -1) throw SysError(format("statting `%1%'") % fnTempRoots); if (st.st_size == 0) break; - + /* The garbage collector deleted this file before we could get a lock. (It won't delete the file after we get a lock.) Try again. */ @@ -218,7 +218,7 @@ void removeTempRoots() /* Automatically clean up the temporary roots file when we exit. */ -struct RemoveTempRoots +struct RemoveTempRoots { ~RemoveTempRoots() { @@ -238,10 +238,10 @@ static void readTempRoots(PathSet & tempRoots, FDs & fds) /* Read the `temproots' directory for per-process temporary root files. */ Strings tempRootFiles = readDirectory( - (format("%1%/%2%") % nixStateDir % tempRootsDir).str()); + (format("%1%/%2%") % settings.nixStateDir % tempRootsDir).str()); foreach (Strings::iterator, i, tempRootFiles) { - Path path = (format("%1%/%2%/%3%") % nixStateDir % tempRootsDir % *i).str(); + Path path = (format("%1%/%2%/%3%") % settings.nixStateDir % tempRootsDir % *i).str(); debug(format("reading temporary root file `%1%'") % path); FDPtr fd(new AutoCloseFD(open(path.c_str(), O_RDWR, 0666))); @@ -295,7 +295,7 @@ static void findRoots(StoreAPI & store, const Path & path, bool recurseSymlinks, bool deleteStale, Roots & roots) { try { - + struct stat st; if (lstat(path.c_str(), &st) == -1) throw SysError(format("statting `%1%'") % path); @@ -315,7 +315,7 @@ static void findRoots(StoreAPI & store, const Path & path, debug(format("found root `%1%' in `%2%'") % target % path); Path storePath = toStorePath(target); - if (store.isValidPath(storePath)) + if (store.isValidPath(storePath)) roots[path] = storePath; else printMsg(lvlInfo, format("skipping invalid root from `%1%' to `%2%'") @@ -350,7 +350,7 @@ static void findRoots(StoreAPI & store, const Path & path, static Roots findRoots(StoreAPI & store, bool deleteStale) { Roots roots; - Path rootsDir = canonPath((format("%1%/%2%") % nixStateDir % gcRootsDir).str()); + Path rootsDir = canonPath((format("%1%/%2%") % settings.nixStateDir % gcRootsDir).str()); findRoots(store, rootsDir, true, deleteStale, roots); return roots; } @@ -365,16 +365,16 @@ Roots LocalStore::findRoots() static void addAdditionalRoots(StoreAPI & store, PathSet & roots) { Path rootFinder = getEnv("NIX_ROOT_FINDER", - nixLibexecDir + "/nix/find-runtime-roots.pl"); + settings.nixLibexecDir + "/nix/find-runtime-roots.pl"); if (rootFinder.empty()) return; - + debug(format("executing `%1%' to find additional roots") % rootFinder); string result = runProgram(rootFinder); Strings paths = tokenizeString(result, "\n"); - + foreach (Strings::iterator, i, paths) { if (isInStore(*i)) { Path path = toStorePath(*i); @@ -556,7 +556,7 @@ bool LocalStore::tryToDelete(GCState & state, const Path & path) } else printMsg(lvlTalkative, format("would delete `%1%'") % path); - + state.deleted.insert(path); if (state.options.action != GCOptions::gcReturnLive) state.results.paths.insert(path); @@ -621,10 +621,10 @@ void LocalStore::removeUnusedLinks(const GCState & state) void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) { GCState state(results); - state.options = options; - - state.gcKeepOutputs = queryBoolSetting("gc-keep-outputs", false); - state.gcKeepDerivations = queryBoolSetting("gc-keep-derivations", true); + state.options = options; + + state.gcKeepOutputs = settings.gcKeepOutputs; + state.gcKeepDerivations = settings.gcKeepDerivations; /* Using `--ignore-liveness' with `--delete' can have unintended consequences if `gc-keep-outputs' or `gc-keep-derivations' are @@ -634,7 +634,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) state.gcKeepOutputs = false; state.gcKeepDerivations = false; } - + /* Acquire the global GC root. This prevents a) New roots from being added. b) Processes from creating new temporary root files. */ @@ -675,18 +675,18 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) if (!tryToDelete(state, *i)) throw Error(format("cannot delete path `%1%' since it is still alive") % *i); } - + } else if (options.maxFreed > 0) { - + if (shouldDelete(state.options.action)) printMsg(lvlError, format("deleting garbage...")); else printMsg(lvlError, format("determining live/dead paths...")); - + try { - AutoCloseDir dir = opendir(nixStore.c_str()); - if (!dir) throw SysError(format("opening directory `%1%'") % nixStore); + AutoCloseDir dir = opendir(settings.nixStore.c_str()); + if (!dir) throw SysError(format("opening directory `%1%'") % settings.nixStore); /* Read the store and immediately delete all paths that aren't valid. When using --max-freed etc., deleting @@ -700,14 +700,14 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) checkInterrupt(); string name = dirent->d_name; if (name == "." || name == "..") continue; - Path path = nixStore + "/" + name; + Path path = settings.nixStore + "/" + name; if (isValidPath(path)) entries.push_back(path); else tryToDelete(state, path); } - dir.close(); + dir.close(); /* Now delete the unreachable valid paths. Randomise the order in which we delete entries to make the collector |