fs_mgr: Support nosymfollow mount option

Summary: The nosymfollow mount option was added to Linux 5.10, and the bionic
headers support it. Allow mounting with the option set. Updated relevant
CTS test too.

Test: Successful build on master

Change-Id: I0b280287e07ef8c485762b820dbbb26300144982
Signed-off-by: Abdelrahman Daim <adaim@meta.com>

fs_mgr/libfstab/fstab.cpp

@@ -39,10 +39,6 @@
 #include "fstab_priv.h"
 #include "logging_macros.h"
 
-#if !defined(MS_LAZYTIME)
-#define MS_LAZYTIME (1 << 25)
-#endif
-
 using android::base::EndsWith;
 using android::base::ParseByteCount;
 using android::base::ParseInt;
@@ -79,6 +75,7 @@ FlagList kMountFlagsList[] = {
         {"slave", MS_SLAVE},
         {"shared", MS_SHARED},
         {"lazytime", MS_LAZYTIME},
+        {"nosymfollow", MS_NOSYMFOLLOW},
         {"defaults", 0},
 };
 

fs_mgr/tests/fs_mgr_test.cpp

@@ -334,6 +334,7 @@ TEST(fs_mgr, fs_mgr_read_fstab_file_proc_mounts) {
                 {"slave", MS_SLAVE},
                 {"shared", MS_SHARED},
                 {"lazytime", MS_LAZYTIME},
+                {"nosymfollow", MS_NOSYMFOLLOW},
                 {"defaults", 0},
                 {0, 0},
         };

init/builtins.cpp

@@ -471,6 +471,7 @@ static struct {
     { "private",    MS_PRIVATE },
     { "slave",      MS_SLAVE },
     { "shared",     MS_SHARED },
+    { "nosymfollow", MS_NOSYMFOLLOW },
     { "defaults",   0 },
     { 0,            0 },
 };