[12]Use the correct root for shared jail when the source storage is also a jail

apps/files_sharing/lib/Cache.php

@@ -29,6 +29,7 @@
 
 use OC\Files\Cache\FailedCache;
 use OC\Files\Cache\Wrapper\CacheJail;
+use OC\Files\Storage\Wrapper\Jail;
 use OCP\Files\Cache\ICacheEntry;
 
 /**
@@ -61,12 +62,30 @@ public function __construct($storage, ICacheEntry $sourceRootInfo) {
 		$this->storage = $storage;
 		$this->sourceRootInfo = $sourceRootInfo;
 		$this->numericId = $sourceRootInfo->getStorageId();
+
 		parent::__construct(
 			null,
-			$this->sourceRootInfo->getPath()
+			null
 		);
 	}
 
+	protected function getRoot() {
+		if (is_null($this->root)) {
+			$absoluteRoot = $this->sourceRootInfo->getPath();
+
+			// the sourceRootInfo path is the absolute path of the folder in the "real" storage
+			// in the case where a folder is shared from a Jail we need to ensure that the share Jail
+			// has it's root set relative to the source Jail
+			$currentStorage = $this->storage->getSourceStorage();
+			if ($currentStorage->instanceOfStorage(Jail::class)) {
+				/** @var Jail $currentStorage */
+				$absoluteRoot = $currentStorage->getJailedPath($absoluteRoot);
+			}
+			$this->root = $absoluteRoot;
+		}
+		return $this->root;
+	}
+
 	public function getCache() {
 		if (is_null($this->cache)) {
 			$sourceStorage = $this->storage->getSourceStorage();
@@ -90,7 +109,7 @@ public function getNumericStorageId() {
 
 	public function get($file) {
 		if ($this->rootUnchanged && ($file === '' || $file === $this->sourceRootInfo->getId())) {
-			return $this->formatCacheEntry(clone $this->sourceRootInfo);
+			return $this->formatCacheEntry(clone $this->sourceRootInfo, '');
 		}
 		return parent::get($file);
 	}
@@ -115,16 +134,20 @@ public function moveFromCache(\OCP\Files\Cache\ICache $sourceCache, $sourcePath,
 		return parent::moveFromCache($sourceCache, $sourcePath, $targetPath);
 	}
 
-	protected function formatCacheEntry($entry) {
-		$path = isset($entry['path']) ? $entry['path'] : '';
-		$entry = parent::formatCacheEntry($entry);
+	protected function formatCacheEntry($entry, $path = null) {
+		if (is_null($path)) {
+			$path = isset($entry['path']) ? $entry['path'] : '';
+			$entry['path'] = $this->getJailedPath($path);
+		} else {
+			$entry['path'] = $path;
+		}
 		$sharePermissions = $this->storage->getPermissions($path);
 		if (isset($entry['permissions'])) {
 			$entry['permissions'] &= $sharePermissions;
 		} else {
 			$entry['permissions'] = $sharePermissions;
 		}
-		$entry['uid_owner'] = $this->storage->getOwner($path);
+		$entry['uid_owner'] = $this->storage->getOwner('');
 		$entry['displayname_owner'] = $this->getOwnerDisplayName();
 		if ($path === '') {
 			$entry['is_share_mount_point'] = true;

apps/files_sharing/tests/CacheTest.php

@@ -30,6 +30,8 @@
 
 namespace OCA\Files_Sharing\Tests;
 
+use OC\Files\Storage\Temporary;
+use OC\Files\Storage\Wrapper\Jail;
 use OCA\Files_Sharing\SharedStorage;
 
 /**
@@ -552,4 +554,41 @@ public function testNumericStorageId() {
 
 		$this->assertEquals($sourceStorage->getCache()->getNumericStorageId(), $sharedStorage->getCache()->getNumericStorageId());
 	}
+
+	public function testShareJailedStorage() {
+		$sourceStorage = new Temporary();
+		$sourceStorage->mkdir('jail');
+		$sourceStorage->mkdir('jail/sub');
+		$sourceStorage->file_put_contents('jail/sub/foo.txt', 'foo');
+		$jailedSource = new Jail([
+			'storage' => $sourceStorage,
+			'root' => 'jail'
+		]);
+		$sourceStorage->getScanner()->scan('');
+		$this->registerMount(self::TEST_FILES_SHARING_API_USER1, $jailedSource, '/' . self::TEST_FILES_SHARING_API_USER1 . '/files/foo');
+
+		self::loginHelper(self::TEST_FILES_SHARING_API_USER1);
+
+		$rootFolder = \OC::$server->getUserFolder(self::TEST_FILES_SHARING_API_USER1);
+		$node = $rootFolder->get('foo/sub');
+		$share = $this->shareManager->newShare();
+		$share->setNode($node)
+			->setShareType(\OCP\Share::SHARE_TYPE_USER)
+			->setSharedWith(self::TEST_FILES_SHARING_API_USER2)
+			->setSharedBy(self::TEST_FILES_SHARING_API_USER1)
+			->setPermissions(\OCP\Constants::PERMISSION_ALL);
+		$this->shareManager->createShare($share);
+		\OC_Util::tearDownFS();
+
+		self::loginHelper(self::TEST_FILES_SHARING_API_USER2);
+		$this->assertEquals('foo', \OC\Files\Filesystem::file_get_contents('/sub/foo.txt'));
+
+		\OC\Files\Filesystem::file_put_contents('/sub/bar.txt', 'bar');
+		/** @var SharedStorage $sharedStorage */
+		list($sharedStorage) = \OC\Files\Filesystem::resolvePath('/' . self::TEST_FILES_SHARING_API_USER2 . '/files/sub');
+
+		$this->assertTrue($sharedStorage->getCache()->inCache('bar.txt'));
+
+		$this->assertTrue($sourceStorage->getCache()->inCache('jail/sub/bar.txt'));
+	}
 }

lib/private/Files/Cache/Wrapper/CacheJail.php

@@ -26,6 +26,7 @@
  */
 
 namespace OC\Files\Cache\Wrapper;
+
 use OC\Files\Cache\Cache;
 use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\Search\ISearchQuery;
@@ -48,11 +49,15 @@ public function __construct($cache, $root) {
 		$this->root = $root;
 	}
 
+	protected function getRoot() {
+		return $this->root;
+	}
+
 	protected function getSourcePath($path) {
 		if ($path === '') {
-			return $this->root;
+			return $this->getRoot();
 		} else {
-			return $this->root . '/' . ltrim($path, '/');
+			return $this->getRoot() . '/' . ltrim($path, '/');
 		}
 	}
 
@@ -61,13 +66,13 @@ protected function getSourcePath($path) {
 	 * @return null|string the jailed path or null if the path is outside the jail
 	 */
 	protected function getJailedPath($path) {
-		if ($this->root === '') {
+		if ($this->getRoot() === '') {
 			return $path;
 		}
-		$rootLength = strlen($this->root) + 1;
-		if ($path === $this->root) {
+		$rootLength = strlen($this->getRoot()) + 1;
+		if ($path === $this->getRoot()) {
 			return '';
-		} else if (substr($path, 0, $rootLength) === $this->root . '/') {
+		} else if (substr($path, 0, $rootLength) === $this->getRoot() . '/') {
 			return substr($path, $rootLength);
 		} else {
 			return null;
@@ -86,8 +91,8 @@ protected function formatCacheEntry($entry) {
 	}
 
 	protected function filterCacheEntry($entry) {
-		$rootLength = strlen($this->root) + 1;
-		return ($entry['path'] === $this->root) or (substr($entry['path'], 0, $rootLength) === $this->root . '/');
+		$rootLength = strlen($this->getRoot()) + 1;
+		return ($entry['path'] === $this->getRoot()) or (substr($entry['path'], 0, $rootLength) === $this->getRoot() . '/');
 	}
 
 	/**
@@ -189,7 +194,7 @@ protected function getMoveInfo($path) {
 	 * remove all entries for files that are stored on the storage from the cache
 	 */
 	public function clear() {
-		$this->getCache()->remove($this->root);
+		$this->getCache()->remove($this->getRoot());
 	}
 
 	/**

lib/private/Files/Storage/Wrapper/Jail.php

@@ -58,6 +58,17 @@ public function getUnjailedPath($path) {
 		}
 	}
 
+	public function getJailedPath($path) {
+		$root = rtrim($this->rootPath, '/') . '/';
+
+		if (strpos($path, $root) !== 0) {
+			return null;
+		} else {
+			$path = substr($path, strlen($this->rootPath));
+			return trim($path, '/');
+		}
+	}
+
 	public function getId() {
 		return parent::getId();
 	}