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>

diff --git a/fs/befs/befs.h b/fs/befs/befs.h
index a8ca7fc..af8ea96 100644 (file)
--- 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 9d1b56c..dc13df8 100644 (file)
--- 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.");