Improve performance when dealing with large numbers of shares

apps/files_sharing/lib/MountProvider.php

@@ -27,6 +27,8 @@
 
 namespace OCA\Files_Sharing;
 
+use OC\Cache\CappedMemoryCache;
+use OC\Files\View;
 use OCP\Files\Config\IMountProvider;
 use OCP\Files\Storage\IStorageFactory;
 use OCP\IConfig;
@@ -84,28 +86,43 @@ public function getMountsForUser(IUser $user, IStorageFactory $storageFactory) {
 		$superShares = $this->buildSuperShares($shares, $user);
 
 		$mounts = [];
+		$view = new View('/' . $user->getUID() . '/files');
+		$ownerViews = [];
+		$sharingDisabledForUser = $this->shareManager->sharingDisabledForUser($user->getUID());
+		$foldersExistCache = new CappedMemoryCache();
 		foreach ($superShares as $share) {
 			try {
-				$mounts[] = new SharedMount(
+				/** @var \OCP\Share\IShare $parentShare */
+				$parentShare = $share[0];
+				$owner = $parentShare->getShareOwner();
+				if (!isset($ownerViews[$owner])) {
+					$ownerViews[$owner] = new View('/' . $parentShare->getShareOwner() . '/files');
+				}
+				$mount = new SharedMount(
 					'\OCA\Files_Sharing\SharedStorage',
 					$mounts,
 					[
 						'user' => $user->getUID(),
 						// parent share
-						'superShare' => $share[0],
+						'superShare' => $parentShare,
 						// children/component of the superShare
 						'groupedShares' => $share[1],
+						'ownerView' => $ownerViews[$owner],
+						'sharingDisabledForUser' => $sharingDisabledForUser
 					],
-					$storageFactory
+					$storageFactory,
+					$view,
+					$foldersExistCache
 				);
+				$mounts[$mount->getMountPoint()] = $mount;
 			} catch (\Exception $e) {
 				$this->logger->logException($e);
 				$this->logger->error('Error while trying to create shared mount');
 			}
 		}
 
 		// array_filter removes the null values from the array
-		return array_filter($mounts);
+		return array_values(array_filter($mounts));
 	}
 
 	/**

apps/files_sharing/lib/SharedMount.php

@@ -28,10 +28,12 @@
 
 namespace OCA\Files_Sharing;
 
+use OC\Cache\CappedMemoryCache;
 use OC\Files\Filesystem;
 use OC\Files\Mount\MountPoint;
 use OC\Files\Mount\MoveableMount;
 use OC\Files\View;
+use OCP\Files\Storage\IStorageFactory;
 
 /**
  * Shared mount points can be moved by the user
@@ -61,19 +63,19 @@ class SharedMount extends MountPoint implements MoveableMount {
 	/**
 	 * @param string $storage
 	 * @param SharedMount[] $mountpoints
-	 * @param array|null $arguments
-	 * @param \OCP\Files\Storage\IStorageFactory $loader
+	 * @param array $arguments
+	 * @param IStorageFactory $loader
+	 * @param View $recipientView
 	 */
-	public function __construct($storage, array $mountpoints, $arguments = null, $loader = null) {
+	public function __construct($storage, array $mountpoints, $arguments, IStorageFactory $loader, View $recipientView, CappedMemoryCache $folderExistCache) {
 		$this->user = $arguments['user'];
-		$this->recipientView = new View('/' . $this->user . '/files');
+		$this->recipientView = $recipientView;
 
 		$this->superShare = $arguments['superShare'];
 		$this->groupedShares = $arguments['groupedShares'];
 
-		$newMountPoint = $this->verifyMountPoint($this->superShare, $mountpoints);
+		$newMountPoint = $this->verifyMountPoint($this->superShare, $mountpoints, $folderExistCache);
 		$absMountPoint = '/' . $this->user . '/files' . $newMountPoint;
-		$arguments['ownerView'] = new View('/' . $this->superShare->getShareOwner() . '/files');
 		parent::__construct($storage, $absMountPoint, $arguments, $loader);
 	}
 
@@ -84,12 +86,18 @@ public function __construct($storage, array $mountpoints, $arguments = null, $lo
 	 * @param SharedMount[] $mountpoints
 	 * @return string
 	 */
-	private function verifyMountPoint(\OCP\Share\IShare $share, array $mountpoints) {
+	private function verifyMountPoint(\OCP\Share\IShare $share, array $mountpoints, CappedMemoryCache $folderExistCache) {
 
 		$mountPoint = basename($share->getTarget());
 		$parent = dirname($share->getTarget());
 
-		if (!$this->recipientView->is_dir($parent)) {
+		if ($folderExistCache->hasKey($parent)) {
+			$parentExists = $folderExistCache->get($parent);
+		} else {
+			$parentExists = $this->recipientView->is_dir($parent);
+			$folderExistCache->set($parent, $parentExists);
+		}
+		if (!$parentExists) {
 			$parent = Helper::getShareFolder($this->recipientView);
 		}
 
@@ -135,19 +143,11 @@ private function generateUniqueTarget($path, $view, array $mountpoints) {
 		$name = $pathinfo['filename'];
 		$dir = $pathinfo['dirname'];
 
-		// Helper function to find existing mount points
-		$mountpointExists = function ($path) use ($mountpoints) {
-			foreach ($mountpoints as $mountpoint) {
-				if ($mountpoint->getShare()->getTarget() === $path) {
-					return true;
-				}
-			}
-			return false;
-		};
-
 		$i = 2;
-		while ($view->file_exists($path) || $mountpointExists($path)) {
+		$absolutePath = $this->recipientView->getAbsolutePath($path) . '/';
+		while ($view->file_exists($path) || isset($mountpoints[$absolutePath])) {
 			$path = Filesystem::normalizePath($dir . '/' . $name . ' (' . $i . ')' . $ext);
+			$absolutePath = $this->recipientView->getAbsolutePath($path) . '/';
 			$i++;
 		}
 

apps/files_sharing/lib/SharedStorage.php

@@ -79,6 +79,9 @@ class SharedStorage extends \OC\Files\Storage\Wrapper\Jail implements ISharedSto
 
 	private $options;
 
+	/** @var boolean */
+	private $sharingDisabledForUser;
+
 	public function __construct($arguments) {
 		$this->ownerView = $arguments['ownerView'];
 		$this->logger = \OC::$server->getLogger();
@@ -87,6 +90,11 @@ public function __construct($arguments) {
 		$this->groupedShares = $arguments['groupedShares'];
 
 		$this->user = $arguments['user'];
+		if (isset($arguments['sharingDisabledForUser'])) {
+			$this->sharingDisabledForUser = $arguments['sharingDisabledForUser'];
+		} else {
+			$this->sharingDisabledForUser = false;
+		}
 
 		parent::__construct([
 			'storage' => null,
@@ -193,7 +201,7 @@ public function getPermissions($target = '') {
 			$permissions |= \OCP\Constants::PERMISSION_DELETE;
 		}
 
-		if (\OCP\Util::isSharingDisabledForUser()) {
+		if ($this->sharingDisabledForUser) {
 			$permissions &= ~\OCP\Constants::PERMISSION_SHARE;
 		}
 

lib/private/Files/Config/UserMountCache.php

@@ -101,17 +101,31 @@ public function registerMounts(IUser $user, array $mounts) {
 			}
 		}, $mounts);
 		$newMounts = array_values(array_filter($newMounts));
+		$newMountRootIds = array_map(function (ICachedMountInfo $mount) {
+			return $mount->getRootId();
+		}, $newMounts);
+		$newMounts = array_combine($newMountRootIds, $newMounts);
 
 		$cachedMounts = $this->getMountsForUser($user);
-		$mountDiff = function (ICachedMountInfo $mount1, ICachedMountInfo $mount2) {
-			// since we are only looking for mounts for a specific user comparing on root id is enough
-			return $mount1->getRootId() - $mount2->getRootId();
-		};
+		$cachedMountRootIds = array_map(function (ICachedMountInfo $mount) {
+			return $mount->getRootId();
+		}, $cachedMounts);
+		$cachedMounts = array_combine($cachedMountRootIds, $cachedMounts);
 
-		/** @var ICachedMountInfo[] $addedMounts */
-		$addedMounts = array_udiff($newMounts, $cachedMounts, $mountDiff);
-		/** @var ICachedMountInfo[] $removedMounts */
-		$removedMounts = array_udiff($cachedMounts, $newMounts, $mountDiff);
+		$addedMounts = [];
+		$removedMounts = [];
+
+		foreach ($newMounts as $rootId => $newMount) {
+			if (!isset($cachedMounts[$rootId])) {
+				$addedMounts[] = $newMount;
+			}
+		}
+
+		foreach ($cachedMounts as $rootId => $cachedMount) {
+			if (!isset($newMounts[$rootId])) {
+				$removedMounts[] = $cachedMount;
+			}
+		}
 
 		$changedMounts = $this->findChangedMounts($newMounts, $cachedMounts);
 
@@ -135,16 +149,19 @@ public function registerMounts(IUser $user, array $mounts) {
 	 * @return ICachedMountInfo[]
 	 */
 	private function findChangedMounts(array $newMounts, array $cachedMounts) {
+		$new = [];
+		foreach ($newMounts as $mount) {
+			$new[$mount->getRootId()] = $mount;
+		}
 		$changed = [];
-		foreach ($newMounts as $newMount) {
-			foreach ($cachedMounts as $cachedMount) {
+		foreach ($cachedMounts as $cachedMount) {
+			$rootId = $cachedMount->getRootId();
+			if (isset($new[$rootId])) {
+				$newMount = $new[$rootId];
 				if (
-					$newMount->getRootId() === $cachedMount->getRootId() &&
-					(
-						$newMount->getMountPoint() !== $cachedMount->getMountPoint() ||
-						$newMount->getStorageId() !== $cachedMount->getStorageId() ||
-						$newMount->getMountId() !== $cachedMount->getMountId()
-					)
+					$newMount->getMountPoint() !== $cachedMount->getMountPoint() ||
+					$newMount->getStorageId() !== $cachedMount->getStorageId() ||
+					$newMount->getMountId() !== $cachedMount->getMountId()
 				) {
 					$changed[] = $newMount;
 				}
@@ -197,7 +214,7 @@ private function dbRowToMountInfo(array $row) {
 		}
 		$mount_id = $row['mount_id'];
 		if (!is_null($mount_id)) {
-			$mount_id = (int) $mount_id;
+			$mount_id = (int)$mount_id;
 		}
 		return new CachedMountInfo($user, (int)$row['storage_id'], (int)$row['root_id'], $row['mount_point'], $mount_id, isset($row['path']) ? $row['path'] : '');
 	}

lib/private/Files/Mount/Manager.php

@@ -38,8 +38,12 @@ class Manager implements IMountManager {
 	/** @var CappedMemoryCache */
 	private $pathCache;
 
+	/** @var CappedMemoryCache */
+	private $inPathCache;
+
 	public function __construct() {
 		$this->pathCache = new CappedMemoryCache();
+		$this->inPathCache = new CappedMemoryCache();
 	}
 
 	/**
@@ -48,6 +52,7 @@ public function __construct() {
 	public function addMount(IMountPoint $mount) {
 		$this->mounts[$mount->getMountPoint()] = $mount;
 		$this->pathCache->clear();
+		$this->inPathCache->clear();
 	}
 
 	/**
@@ -60,16 +65,18 @@ public function removeMount(string $mountPoint) {
 		}
 		unset($this->mounts[$mountPoint]);
 		$this->pathCache->clear();
+		$this->inPathCache->clear();
 	}
 
 	/**
 	 * @param string $mountPoint
 	 * @param string $target
 	 */
-	public function moveMount(string $mountPoint, string $target){
+	public function moveMount(string $mountPoint, string $target) {
 		$this->mounts[$target] = $this->mounts[$mountPoint];
 		unset($this->mounts[$mountPoint]);
 		$this->pathCache->clear();
+		$this->inPathCache->clear();
 	}
 
 	/**
@@ -80,32 +87,29 @@ public function moveMount(string $mountPoint, string $target){
 	 */
 	public function find(string $path) {
 		\OC_Util::setupFS();
-		$path = $this->formatPath($path);
-		if (isset($this->mounts[$path])) {
-			return $this->mounts[$path];
-		}
+		$path = Filesystem::normalizePath($path);
 
 		if (isset($this->pathCache[$path])) {
 			return $this->pathCache[$path];
 		}
 
-		\OC_Hook::emit('OC_Filesystem', 'get_mountpoint', ['path' => $path]);
-		$foundMountPoint = '';
-		$mountPoints = array_keys($this->mounts);
-		$foundMountPointLength = 0;
-		foreach ($mountPoints as $mountpoint) {
-			if (\strlen($mountpoint) > $foundMountPointLength && strpos($path, $mountpoint) === 0) {
-				$foundMountPoint = $mountpoint;
-				$foundMountPointLength = \strlen($foundMountPoint);
+		$current = $path;
+		while (true) {
+			$mountPoint = $current . '/';
+			if (isset($this->mounts[$mountPoint])) {
+				$this->pathCache[$path] = $this->mounts[$mountPoint];
+				return $this->mounts[$mountPoint];
 			}
-		}
 
-		if (isset($this->mounts[$foundMountPoint])) {
-			$this->pathCache[$path] = $this->mounts[$foundMountPoint];
-			return $this->mounts[$foundMountPoint];
-		}
+			if ($current === '') {
+				return null;
+			}
 
-		return null;
+			$current = dirname($current);
+			if ($current === '.' || $current === '/') {
+				$current = '';
+			}
+		}
 	}
 
 	/**
@@ -117,6 +121,11 @@ public function find(string $path) {
 	public function findIn(string $path): array {
 		\OC_Util::setupFS();
 		$path = $this->formatPath($path);
+
+		if (isset($this->inPathCache[$path])) {
+			return $this->inPathCache[$path];
+		}
+
 		$result = [];
 		$pathLength = \strlen($path);
 		$mountPoints = array_keys($this->mounts);
@@ -125,12 +134,15 @@ public function findIn(string $path): array {
 				$result[] = $this->mounts[$mountPoint];
 			}
 		}
+
+		$this->inPathCache[$path] = $result;
 		return $result;
 	}
 
 	public function clear() {
 		$this->mounts = [];
 		$this->pathCache->clear();
+		$this->inPathCache->clear();
 	}
 
 	/**