New fstab flags to support more expressive SD card permissions

Bug: 10330128

Change-Id: I41fb178b839487b604762fbc1ccba097d25c7aa0

fs_mgr/fs_mgr.c

@@ -92,6 +92,7 @@ static struct flag_list fs_mgr_flags[] = {
     { "swapprio=",   MF_SWAPPRIO },
     { "zramsize=",   MF_ZRAMSIZE },
     { "verify",      MF_VERIFY },
+    { "noemulatedsd", MF_NOEMULATEDSD },
     { "defaults",    0 },
     { 0,             0 },
 };
@@ -931,3 +932,8 @@ int fs_mgr_is_encryptable(struct fstab_rec *fstab)
 {
     return fstab->fs_mgr_flags & MF_CRYPT;
 }
+
+int fs_mgr_is_noemulatedsd(struct fstab_rec *fstab)
+{
+    return fstab->fs_mgr_flags & MF_NOEMULATEDSD;
+}

fs_mgr/fs_mgr_priv.h

@@ -72,6 +72,12 @@
 #define MF_SWAPPRIO     0x80
 #define MF_ZRAMSIZE     0x100
 #define MF_VERIFY       0x200
+/*
+ * There is no emulated sdcard daemon running on /data/media on this device,
+ * so treat the physical SD card as the only external storage device,
+ * a la the Nexus One.
+ */
+#define MF_NOEMULATEDSD 0x400
 
 #define DM_BUF_SIZE 4096
 

fs_mgr/include/fs_mgr.h

@@ -62,6 +62,7 @@ struct fstab_rec *fs_mgr_get_entry_for_mount_point(struct fstab *fstab, const ch
 int fs_mgr_is_voldmanaged(struct fstab_rec *fstab);
 int fs_mgr_is_nonremovable(struct fstab_rec *fstab);
 int fs_mgr_is_encryptable(struct fstab_rec *fstab);
+int fs_mgr_is_noemulatedsd(struct fstab_rec *fstab);
 int fs_mgr_swapon_all(struct fstab *fstab);
 #ifdef __cplusplus
 }