[EXT2]

[reactos.git] / reactos / drivers / filesystems / ext2 / src / memory.c

diff --git a/reactos/drivers/filesystems/ext2/src/memory.c b/reactos/drivers/filesystems/ext2/src/memory.c
index 8cd9a9f..6678579 100644 (file)
--- a/reactos/drivers/filesystems/ext2/src/memory.c
+++ b/reactos/drivers/filesystems/ext2/src/memory.c
@@ -2318,17 +2318,22 @@ Ext2InitializeVcb( IN PEXT2_IRP_CONTEXT IrpContext,
             _SEH2_LEAVE;
         }
 
-        /* checking in/compat features */
-        if (IsFlagOn(sb->s_feature_compat, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
-            Vcb->IsExt3fs = TRUE;
-        }
-
-        /* don't mount any volumes with external journal devices */
-        if (IsFlagOn(sb->s_feature_incompat, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
+        /* Reject mounting volume if we encounter unsupported incompat features */
+        if (FlagOn(sb->s_feature_incompat, ~EXT4_FEATURE_INCOMPAT_SUPP)) {
             Status = STATUS_UNRECOGNIZED_VOLUME;
             _SEH2_LEAVE;
         }
 
+        /* Mount the volume RO if we encounter unsupported ro_compat features */
+        if (FlagOn(sb->s_feature_ro_compat, ~EXT4_FEATURE_RO_COMPAT_SUPP)) {
+            SetLongFlag(Vcb->Flags, VCB_RO_COMPAT_READ_ONLY);
+        }
+
+        /* Recognize the filesystem as Ext3fs if it supports journalling */
+        if (IsFlagOn(sb->s_feature_compat, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
+            Vcb->IsExt3fs = TRUE;
+        }
+
         /* check block size */
         Vcb->BlockSize  = (EXT2_MIN_BLOCK_SIZE << sb->s_log_block_size);
         /* we cannot handle volume with block size bigger than 64k */