зеркало из https://github.com/mozilla/gecko-dev.git
Bug 669410 - Use PrefixSet to speed up URL classification. r=tony
This commit is contained in:
Gian-Carlo Pascutto
Родитель
9a5f444432
Коммит
e59151216c
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@ -160,9 +160,9 @@
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#define NS_TYPEAHEADFIND_CID \
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{ 0xe7f70966, 0x9a37, 0x48d7, { 0x8a, 0xeb, 0x35, 0x99, 0x8f, 0x31, 0x09, 0x0e} }
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// {61a2318e-0a7a-483e-9105-367d4827f288}
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// {6e9f759a-3f8d-4552-99ed-dbf0ea0a5f67}
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#define NS_URLCLASSIFIERPREFIXSET_CID \
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{ 0x61a2318e, 0x0a7a, 0x483e, { 0x91, 0x05, 0x36, 0x7d, 0x48, 0x27, 0xf2, 0x88} }
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{ 0x6e9f759a, 0x3f8d, 0x4552, { 0x99, 0xed, 0xdb, 0xf0, 0xea, 0x0a, 0x5f, 0x67} }
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// {5eb7c3c1-ec1f-4007-87cc-eefb37d68ce6}
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#define NS_URLCLASSIFIERDBSERVICE_CID \
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@ -7,6 +7,8 @@ interface nsIUrlClassifierPrefixSet : nsISupports
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{
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void setPrefixes([const, array, size_is(aLength)] in unsigned long aPrefixes,
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in unsigned long aLength);
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void addPrefixes([const, array, size_is(aLength)] in unsigned long aPrefixes,
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in unsigned long aLength);
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boolean contains(in unsigned long aPrefix);
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PRUint32 estimateSize();
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};
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@ -66,6 +66,7 @@
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#include "nsUrlClassifierDBService.h"
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#include "nsUrlClassifierUtils.h"
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#include "nsUrlClassifierProxies.h"
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#include "nsIUrlClassifierPrefixSet.h"
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#include "nsURILoader.h"
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#include "nsString.h"
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#include "nsReadableUtils.h"
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@ -177,6 +178,10 @@ static const PRLogModuleInfo *gUrlClassifierDbServiceLog = nsnull;
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#define UPDATE_DELAY_TIME "urlclassifier.updatetime"
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#define UPDATE_DELAY_TIME_DEFAULT 60
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// XOR value for encoding domains-present in the prefix tree,
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// to distinguish them from completely blocked domains.
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#define ENCODE_DOMAIN_MAGIC 0xAF154126
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class nsUrlClassifierDBServiceWorker;
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// Singleton instance.
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@ -274,6 +279,9 @@ struct nsUrlClassifierHash
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NS_ASSERTION(sHashSize >= PARTIAL_LENGTH, "nsUrlClassifierHash must be at least PARTIAL_LENGTH bytes long");
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return memcmp(buf, hash.buf, PARTIAL_LENGTH) == 0;
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}
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PRUint32 ToUint32() const {
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return *(reinterpret_cast<const PRUint32*>(buf));
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}
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};
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typedef nsUrlClassifierHash<DOMAIN_LENGTH> nsUrlClassifierDomainHash;
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@ -481,6 +489,9 @@ public:
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PRBool before,
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nsTArray<nsUrlClassifierEntry> &entries);
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// Return an array with all Prefixes known
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nsresult ReadPrefixes(nsTArray<PRUint32>& array);
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protected:
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nsresult ReadEntries(mozIStorageStatement *statement,
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nsTArray<nsUrlClassifierEntry>& entries);
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@ -498,6 +509,9 @@ protected:
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nsCOMPtr<mozIStorageStatement> mPartialEntriesAfterStatement;
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nsCOMPtr<mozIStorageStatement> mLastPartialEntriesStatement;
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nsCOMPtr<mozIStorageStatement> mPartialEntriesBeforeStatement;
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nsCOMPtr<mozIStorageStatement> mAllPrefixStatement;
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nsCOMPtr<mozIStorageStatement> mDomainPrefixStatement;
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};
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nsresult
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@ -554,6 +568,18 @@ nsUrlClassifierStore::Init(nsUrlClassifierDBServiceWorker *worker,
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getter_AddRefs(mPartialEntriesBeforeStatement));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mConnection->CreateStatement
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(NS_LITERAL_CSTRING("SELECT domain, partial_data, complete_data FROM ")
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+ entriesName,
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getter_AddRefs(mAllPrefixStatement));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mConnection->CreateStatement
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(NS_LITERAL_CSTRING("SELECT domain FROM ") + entriesName +
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NS_LITERAL_CSTRING(" GROUP BY domain"),
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getter_AddRefs(mDomainPrefixStatement));
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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@ -572,6 +598,9 @@ nsUrlClassifierStore::Close()
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mPartialEntriesBeforeStatement = nsnull;
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mLastPartialEntriesStatement = nsnull;
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mAllPrefixStatement = nsnull;
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mDomainPrefixStatement = nsnull;
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mConnection = nsnull;
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}
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@ -1006,7 +1035,8 @@ public:
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NS_DECL_NSIURLCLASSIFIERDBSERVICEWORKER
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// Initialize, called in the main thread
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nsresult Init(PRInt32 gethashNoise);
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nsresult Init(PRInt32 gethashNoise,
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nsCOMPtr<nsIUrlClassifierPrefixSet> & prefSet);
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// Queue a lookup for the worker to perform, called in the main thread.
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nsresult QueueLookup(const nsACString& lookupKey,
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@ -1157,9 +1187,6 @@ private:
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nsresult GetHostKeys(const nsACString &spec,
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nsTArray<nsCString> &hostKeys);
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// Read all relevant entries for the given URI into mCachedEntries.
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nsresult CacheEntries(const nsCSubstring& spec);
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// Look for a given lookup string (www.hostname.com/path/to/resource.html)
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// Returns a list of entries that match.
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nsresult Check(const nsCSubstring& spec,
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@ -1173,6 +1200,9 @@ private:
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PRInt32 count,
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nsTArray<nsUrlClassifierLookupResult>& results);
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// Construct a Prefix Tree with known prefixes
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nsresult ConstructPrefixTree();
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nsCOMPtr<nsIFile> mDBFile;
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nsCOMPtr<nsICryptoHash> mCryptoHash;
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@ -1270,14 +1300,8 @@ private:
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// not necessary).
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Mutex mCleanHostKeysLock;
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// We maintain an MRU cache of clean fragments (fragments with no
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// entry in the db).
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nsUrlClassifierFragmentSet mCleanFragments;
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// The host keys from the last host to be checked for malware are
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// cached for quicker lookup next time through.
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nsCString mCachedHostKey;
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nsTArray<nsUrlClassifierEntry> mCachedEntries;
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// Set of prefixes known to be in the database
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nsCOMPtr<nsIUrlClassifierPrefixSet> mPrefixSet;
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// Pending lookups are stored in a queue for processing. The queue
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// is protected by mPendingLookupLock.
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@ -1317,6 +1341,7 @@ nsUrlClassifierDBServiceWorker::nsUrlClassifierDBServiceWorker()
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, mUpdateStartTime(0)
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, mGethashNoise(0)
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, mCleanHostKeysLock("nsUrlClassifierDBServerWorker.mCleanHostKeysLock")
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, mPrefixSet(0)
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, mPendingLookupLock("nsUrlClassifierDBServerWorker.mPendingLookupLock")
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{
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}
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@ -1329,9 +1354,11 @@ nsUrlClassifierDBServiceWorker::~nsUrlClassifierDBServiceWorker()
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}
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nsresult
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nsUrlClassifierDBServiceWorker::Init(PRInt32 gethashNoise)
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nsUrlClassifierDBServiceWorker::Init(PRInt32 gethashNoise,
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nsCOMPtr<nsIUrlClassifierPrefixSet> & prefSet)
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{
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mGethashNoise = gethashNoise;
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mPrefixSet = prefSet;
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// Compute database filename
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@ -1353,9 +1380,6 @@ nsUrlClassifierDBServiceWorker::Init(PRInt32 gethashNoise)
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if (!mCleanHostKeys.Init(CLEAN_HOST_KEYS_SIZE))
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return NS_ERROR_OUT_OF_MEMORY;
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if (!mCleanFragments.Init(CLEAN_FRAGMENTS_SIZE))
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return NS_ERROR_OUT_OF_MEMORY;
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ResetUpdate();
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mTableFreshness.Init();
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@ -1503,70 +1527,34 @@ nsUrlClassifierDBServiceWorker::GetLookupFragments(const nsACString& spec,
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}
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nsresult
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nsUrlClassifierDBServiceWorker::CacheEntries(const nsACString& spec)
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nsUrlClassifierDBServiceWorker::Check(const nsACString& spec,
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nsTArray<nsUrlClassifierLookupResult>& results)
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{
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nsAutoTArray<nsCString, 2> lookupHosts;
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nsresult rv = GetHostKeys(spec, lookupHosts);
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NS_ENSURE_SUCCESS(rv, rv);
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// Build a unique string for this set of lookup hosts.
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nsCAutoString hostKey;
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// First check if any of the hosts appear in the DB
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PRBool anyFound = PR_FALSE;
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for (PRUint32 i = 0; i < lookupHosts.Length(); i++) {
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hostKey.Append(lookupHosts[i]);
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hostKey.Append("|");
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}
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if (hostKey == mCachedHostKey) {
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// mCachedHostKeys is valid for this set of lookup hosts.
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return NS_OK;
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}
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mCachedEntries.Clear();
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mCachedHostKey.Truncate();
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PRUint32 prevLength = 0;
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for (PRUint32 i = 0; i < lookupHosts.Length(); i++) {
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// First, if this key has been checked since our last update and
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// had no entries, we don't need to check the DB here. We also do
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// this check before posting the lookup to this thread, but in
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// case multiple lookups are queued at the same time, it's worth
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// checking again here.
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{
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MutexAutoLock lock(mCleanHostKeysLock);
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if (mCleanHostKeys.Has(lookupHosts[i]))
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continue;
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}
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// Read the entries for this lookup houst
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nsUrlClassifierDomainHash hostKeyHash;
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hostKeyHash.FromPlaintext(lookupHosts[i], mCryptoHash);
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mMainStore.ReadAddEntries(hostKeyHash, mCachedEntries);
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if (mCachedEntries.Length() == prevLength) {
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// There were no entries in the db for this host key. Go
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// ahead and mark the host key as clean to help short-circuit
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// future lookups.
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// Probe the Prefix Tree for presence
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PRUint32 domainkey = hostKeyHash.ToUint32() ^ ENCODE_DOMAIN_MAGIC;
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PRBool found;
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rv = mPrefixSet->Contains(domainkey, &found);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!found) {
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MutexAutoLock lock(mCleanHostKeysLock);
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mCleanHostKeys.Put(lookupHosts[i]);
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} else {
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prevLength = mCachedEntries.Length();
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anyFound = PR_TRUE;
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}
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}
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mCachedHostKey = hostKey;
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return NS_OK;
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}
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nsresult
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nsUrlClassifierDBServiceWorker::Check(const nsACString& spec,
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nsTArray<nsUrlClassifierLookupResult>& results)
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{
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// Read any entries that might apply to this URI into mCachedEntries
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nsresult rv = CacheEntries(spec);
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NS_ENSURE_SUCCESS(rv, rv);
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if (mCachedEntries.Length() == 0) {
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if (!anyFound) {
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return NS_OK;
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}
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@ -1579,14 +1567,24 @@ nsUrlClassifierDBServiceWorker::Check(const nsACString& spec,
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// Now check each lookup fragment against the entries in the DB.
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for (PRUint32 i = 0; i < fragments.Length(); i++) {
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// If this fragment has been previously checked, ignore it.
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if (mCleanFragments.Has(fragments[i]))
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continue;
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nsUrlClassifierCompleteHash lookupHash;
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lookupHash.FromPlaintext(fragments[i], mCryptoHash);
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PRBool foundMatch = PR_FALSE;
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PRUint32 fragmentkey = lookupHash.ToUint32();
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PRBool foundPrefix;
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rv = mPrefixSet->Contains(fragmentkey, &foundPrefix);
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NS_ENSURE_SUCCESS(rv, rv);
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if (foundPrefix) {
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// Find the corresponding host key
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nsUrlClassifierDomainHash hostKey;
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nsresult rv = GetKey(fragments[i], hostKey);
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NS_ENSURE_SUCCESS(rv, rv);
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// Read the entries for this fragments host from SQLite
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nsTArray<nsUrlClassifierEntry> mCachedEntries;
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mMainStore.ReadAddEntries(hostKey, mCachedEntries);
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for (PRUint32 j = 0; j < mCachedEntries.Length(); j++) {
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nsUrlClassifierEntry &entry = mCachedEntries[j];
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if (entry.Match(lookupHash)) {
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@ -1619,16 +1617,10 @@ nsUrlClassifierDBServiceWorker::Check(const nsACString& spec,
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// an up-to-date table.
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result->mConfirmed = entry.mHaveComplete && fresh;
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foundMatch = PR_TRUE;
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LOG(("Found a result. complete=%d, fresh=%d",
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entry.mHaveComplete, fresh));
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}
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}
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if (!foundMatch) {
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// This fragment is clean, we don't need to bother checking it
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// again until the next update.
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mCleanFragments.Put(fragments[i]);
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}
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}
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@ -2866,11 +2858,6 @@ nsUrlClassifierDBServiceWorker::ResetUpdate()
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void
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nsUrlClassifierDBServiceWorker::ResetLookupCache()
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{
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mCachedHostKey.Truncate();
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mCachedEntries.Clear();
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mCleanFragments.Clear();
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MutexAutoLock lock(mCleanHostKeysLock);
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mCleanHostKeys.Clear();
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}
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@ -3173,6 +3160,9 @@ nsUrlClassifierDBServiceWorker::ApplyUpdate()
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// We have modified the db, we can't trust the set of clean
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// fragments or domains anymore.
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ResetLookupCache();
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// Reconstruct the prefix tree from the DB
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nsresult rv = ConstructPrefixTree();
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (mGrewCache) {
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@ -3333,11 +3323,6 @@ nsUrlClassifierDBServiceWorker::CacheCompletions(nsTArray<nsUrlClassifierLookupR
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mMainStore.UpdateEntry(result.mEntry);
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}
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// Completions change entries in the DB, the cached set of entries is
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// no longer valid.
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mCachedHostKey.Truncate();
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mCachedEntries.Clear();
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return NS_OK;
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}
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@ -3463,6 +3448,97 @@ nsUrlClassifierDBServiceWorker::OpenDb()
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mCryptoHash = do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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LOG(("SB construcing Prefix Tree\n"));
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rv = ConstructPrefixTree();
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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nsresult nsUrlClassifierStore::ReadPrefixes(nsTArray<PRUint32>& array)
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{
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mozStorageStatementScoper scoper(mAllPrefixStatement);
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mozStorageStatementScoper scopertoo(mDomainPrefixStatement);
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PRBool hasMoreData;
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PRUint32 dcnt = 0;
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PRUint32 pcnt = 0;
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PRUint32 fcnt = 0;
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while (NS_SUCCEEDED(mDomainPrefixStatement->ExecuteStep(&hasMoreData)) && hasMoreData) {
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PRUint32 domainval;
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PRUint32 size;
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const PRUint8 *blobdomain = mDomainPrefixStatement->AsSharedBlob(0, &size);
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if (!blobdomain || (size != DOMAIN_LENGTH))
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return PR_FALSE;
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domainval = *(reinterpret_cast<const PRUint32*>(blobdomain));
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// Encode that the domain is present.
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// We need to encode this so it will not match with
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// the same entry with an empty path.
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domainval ^= ENCODE_DOMAIN_MAGIC;
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array.AppendElement(domainval);
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dcnt++;
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}
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while (NS_SUCCEEDED(mAllPrefixStatement->ExecuteStep(&hasMoreData)) && hasMoreData) {
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PRUint32 prefixval;
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PRUint32 domainval;
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PRUint32 size;
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const PRUint8 *blobdomain = mAllPrefixStatement->AsSharedBlob(0, &size);
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if (!blobdomain || (size != DOMAIN_LENGTH))
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return PR_FALSE;
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domainval = *(reinterpret_cast<const PRUint32*>(blobdomain));
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const PRUint8 *blobprefix = mAllPrefixStatement->AsSharedBlob(1, &size);
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if (!blobprefix || (size != PARTIAL_LENGTH)) {
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const PRUint8 *blobfull = mAllPrefixStatement->AsSharedBlob(2, &size);
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if (!blobfull || (size != COMPLETE_LENGTH)) {
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prefixval = domainval;
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fcnt++;
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} else {
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prefixval = *(reinterpret_cast<const PRUint32*>(blobfull));
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}
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} else {
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prefixval = *(reinterpret_cast<const PRUint32*>(blobprefix));
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}
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array.AppendElement(prefixval);
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pcnt++;
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}
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LOG(("SB domains: %d prefixes: %d fulldomain: %d\n", dcnt, pcnt, fcnt));
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return NS_OK;
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}
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nsresult
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nsUrlClassifierDBServiceWorker::ConstructPrefixTree()
|
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{
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nsTArray<PRUint32> array;
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nsresult rv = mMainStore.ReadPrefixes(array);
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NS_ENSURE_SUCCESS(rv, rv);
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if (array.Length() > 0) {
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// clear old tree
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||||
rv = mPrefixSet->SetPrefixes(array.Elements(), 0);
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||||
NS_ENSURE_SUCCESS(rv, rv);
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// construct new one
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rv = mPrefixSet->SetPrefixes(array.Elements(), array.Length());
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NS_ENSURE_SUCCESS(rv, rv);
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}
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#ifdef DEBUG
|
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PRUint32 size = 0;
|
||||
rv = mPrefixSet->EstimateSize(&size);
|
||||
LOG(("SB tree done, size = %d bytes\n", size));
|
||||
NS_ENSURE_SUCCESS(rv, rv);
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||||
#endif
|
||||
|
||||
return NS_OK;
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||||
}
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||||
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|
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@ -3859,6 +3935,9 @@ nsUrlClassifierDBService::Init()
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do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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mPrefixSet = do_CreateInstance("@mozilla.org/url-classifier/prefixset;1", &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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// Should we check document loads for malware URIs?
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nsCOMPtr<nsIPrefBranch2> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
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@ -3913,7 +3992,7 @@ nsUrlClassifierDBService::Init()
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if (!mWorker)
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return NS_ERROR_OUT_OF_MEMORY;
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rv = mWorker->Init(gethashNoise);
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||||
rv = mWorker->Init(gethashNoise, mPrefixSet);
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||||
if (NS_FAILED(rv)) {
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mWorker = nsnull;
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return rv;
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@ -45,6 +45,7 @@
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#include "nsID.h"
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#include "nsInterfaceHashtable.h"
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#include "nsIObserver.h"
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#include "nsIUrlClassifierPrefixSet.h"
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#include "nsIUrlClassifierHashCompleter.h"
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#include "nsIUrlClassifierDBService.h"
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#include "nsIURIClassifier.h"
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@ -124,6 +125,9 @@ private:
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// The list of tables that can use the default hash completer object.
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nsTArray<nsCString> mGethashWhitelist;
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// Set of prefixes known to be in the database
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nsCOMPtr<nsIUrlClassifierPrefixSet> mPrefixSet;
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// Thread that we do the updates on.
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static nsIThread* gDbBackgroundThread;
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};
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