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Merge pull request #8765 from NixLayeredStore/refactor-store-verify

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More cleanups for `LocalStore::verifyPath`
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John Ericson 2023-08-02 13:39:29 -04:00 committed by GitHub
parent d00469ebf9 66550878df
commit 3723363697
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2 changed files with 29 additions and 13 deletions
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40
src/libstore/local-store.cc
View file

@ -1499,17 +1499,33 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
auto fdGCLock = openGCLock();
FdLock gcLock(fdGCLock.get(), ltRead, true, "waiting for the big garbage collector lock...");
StringSet store;
for (auto & i : readDirectory(realStoreDir)) store.insert(i.name);
/* Check whether all valid paths actually exist. */
printInfo("checking path existence...");
StorePathSet validPaths;
StorePathSet done;
for (auto & i : queryAllValidPaths())
verifyPath(i, store, done, validPaths, repair, errors);
{
StorePathSet storePathsInStoreDir;
/* Why aren't we using `queryAllValidPaths`? Because that would
tell us about all the paths than the database knows about. Here we
want to know about all the store paths in the store directory,
regardless of what the database thinks.
We will end up cross-referencing these two sources of truth (the
database and the filesystem) in the loop below, in order to catch
invalid states.
*/
for (auto & i : readDirectory(realStoreDir)) {
try {
storePathsInStoreDir.insert({i.name});
} catch (BadStorePath &) { }
}
/* Check whether all valid paths actually exist. */
printInfo("checking path existence...");
StorePathSet done;
for (auto & i : queryAllValidPaths())
verifyPath(i, storePathsInStoreDir, done, validPaths, repair, errors);
}
/* Optionally, check the content hashes (slow). */
if (checkContents) {
@ -1595,21 +1611,21 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
}
void LocalStore::verifyPath(const StorePath & path, const StringSet & store,
void LocalStore::verifyPath(const StorePath & path, const StorePathSet & storePathsInStoreDir,
StorePathSet & done, StorePathSet & validPaths, RepairFlag repair, bool & errors)
{
checkInterrupt();
if (!done.insert(path).second) return;
if (!store.count(std::string(path.to_string()))) {
if (!storePathsInStoreDir.count(path)) {
/* Check any referrers first. If we can invalidate them
first, then we can invalidate this path as well. */
bool canInvalidate = true;
StorePathSet referrers; queryReferrers(path, referrers);
for (auto & i : referrers)
if (i != path) {
verifyPath(i, store, done, validPaths, repair, errors);
verifyPath(i, storePathsInStoreDir, done, validPaths, repair, errors);
if (validPaths.count(i))
canInvalidate = false;
}

2
src/libstore/local-store.hh
View file

@ -314,7 +314,7 @@ private:
*/
void invalidatePathChecked(const StorePath & path);
void verifyPath(const StorePath & path, const StringSet & store,
void verifyPath(const StorePath & path, const StorePathSet & store,
StorePathSet & done, StorePathSet & validPaths, RepairFlag repair, bool & errors);
std::shared_ptr<const ValidPathInfo> queryPathInfoInternal(State & state, const StorePath & path);