Add verity symlink tests

PiperOrigin-RevId: 384823097

2 files changed, 22 insertions, 3 deletions

diff --git a/test/util/verity_util.cc b/test/util/verity_util.cc
index f1b4c251b..501d7c2cf 100644
--- a/test/util/verity_util.cc
+++ b/test/util/verity_util.cc
@@ -55,17 +55,26 @@ PosixError FlipRandomBit(int fd, int size) {
 }
 
 PosixErrorOr<std::string> MountVerity(std::string tmpfs_dir,
-                                      std::string filename) {
+                                      std::string filename,
+                                      std::vector<EnableTarget> targets) {
   // Mount a verity fs on the existing tmpfs mount.
   std::string mount_opts = "lower_path=" + tmpfs_dir;
   ASSIGN_OR_RETURN_ERRNO(TempPath verity_dir, TempPath::CreateDir());
   RETURN_ERROR_IF_SYSCALL_FAIL(
       mount("", verity_dir.path().c_str(), "verity", 0, mount_opts.c_str()));
 
-  // Enable both the file and the directory.
+  // Enable the file, symlink(if provided) and the directory.
   ASSIGN_OR_RETURN_ERRNO(
       auto fd, Open(JoinPath(verity_dir.path(), filename), O_RDONLY, 0777));
   RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(fd.get(), FS_IOC_ENABLE_VERITY));
+
+  for (const EnableTarget& target : targets) {
+    ASSIGN_OR_RETURN_ERRNO(
+        auto target_fd,
+        Open(JoinPath(verity_dir.path(), target.path), target.flags, 0777));
+    RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(target_fd.get(), FS_IOC_ENABLE_VERITY));
+  }
+
   ASSIGN_OR_RETURN_ERRNO(auto dir_fd, Open(verity_dir.path(), O_RDONLY, 0777));
   RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(dir_fd.get(), FS_IOC_ENABLE_VERITY));
 
diff --git a/test/util/verity_util.h b/test/util/verity_util.h
index 18743ecd6..44863f322 100644
--- a/test/util/verity_util.h
+++ b/test/util/verity_util.h
@@ -17,6 +17,8 @@
 
 #include <stdint.h>
 
+#include <vector>
+
 #include "test/util/posix_error.h"
 
 namespace gvisor {
@@ -44,6 +46,13 @@ struct fsverity_digest {
   unsigned char digest[];
 };
 
+struct EnableTarget {
+  std::string path;
+  int flags;
+
+  EnableTarget(std::string path, int flags) : path(path), flags(flags) {}
+};
+
 constexpr int kMaxDigestSize = 64;
 constexpr int kDefaultDigestSize = 32;
 constexpr char kContents[] = "foobarbaz";
@@ -67,7 +76,8 @@ PosixError FlipRandomBit(int fd, int size);
 // Mount a verity on the tmpfs and enable both the file and the direcotry. Then
 // mount a new verity with measured root hash.
 PosixErrorOr<std::string> MountVerity(std::string tmpfs_dir,
-                                      std::string filename);
+                                      std::string filename,
+                                      std::vector<EnableTarget> targets);
 
 }  // namespace testing
 }  // namespace gvisor