befs: add flags field to validate superblock state

For validating superblock state, add flags field to befs_sb_info, read the state from the disk
and check if it is equal to BEFS_DIRTY.

Signed-off-by: Salah Triki <salah.triki@gmail.com>
Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>

2 files changed, 6 insertions, 1 deletions

diff --git a/fs/befs/befs.h b/fs/befs/befs.h
index a8ca7fcf0795..af8ea961e88f 100644
--- a/fs/befs/befs.h
+++ b/fs/befs/befs.h
@@ -43,6 +43,9 @@ struct befs_sb_info {
         u32 ag_shift;
         u32 num_ags;
 
+        /* State of the superblock */
+        u32 flags;
+
         /* jornal log entry */
         befs_block_run log_blocks;
         befs_off_t log_start;
diff --git a/fs/befs/super.c b/fs/befs/super.c
index 9d1b56cd6f19..dc13df8de3e8 100644
--- a/fs/befs/super.c
+++ b/fs/befs/super.c
@@ -45,6 +45,8 @@ befs_load_sb(struct super_block *sb, befs_super_block * disk_sb)
         befs_sb->ag_shift = fs32_to_cpu(sb, disk_sb->ag_shift);
         befs_sb->num_ags = fs32_to_cpu(sb, disk_sb->num_ags);
 
+        befs_sb->flags = fs32_to_cpu(sb, disk_sb->flags);
+
         befs_sb->log_blocks = fsrun_to_cpu(sb, disk_sb->log_blocks);
         befs_sb->log_start = fs64_to_cpu(sb, disk_sb->log_start);
         befs_sb->log_end = fs64_to_cpu(sb, disk_sb->log_end);
@@ -101,7 +103,7 @@ befs_check_sb(struct super_block *sb)
                 return BEFS_ERR;
         }
 
-        if (befs_sb->log_start != befs_sb->log_end) {
+        if (befs_sb->log_start != befs_sb->log_end || befs_sb->flags == BEFS_DIRTY) {
                 befs_error(sb, "Filesystem not clean! There are blocks in the "
                            "journal. You must boot into BeOS and mount this volume "
                            "to make it clean.");