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path: root/fs/logfs/super.c
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Diffstat (limited to 'fs/logfs/super.c')
-rw-r--r--fs/logfs/super.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index 1d081b7ede5a..c66beab78dee 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -440,7 +440,7 @@ static int __logfs_read_sb(struct super_block *sb)
return 0;
}
-static int logfs_read_sb(struct super_block *sb)
+static int logfs_read_sb(struct super_block *sb, int read_only)
{
struct logfs_super *super = logfs_super(sb);
int ret;
@@ -460,6 +460,12 @@ static int logfs_read_sb(struct super_block *sb)
if (ret)
return ret;
+ if (super->s_feature_incompat & ~LOGFS_FEATURES_INCOMPAT)
+ return -EIO;
+ if ((super->s_feature_ro_compat & ~LOGFS_FEATURES_RO_COMPAT) &&
+ !read_only)
+ return -EIO;
+
mutex_init(&super->s_dirop_mutex);
mutex_init(&super->s_object_alias_mutex);
INIT_LIST_HEAD(&super->s_freeing_list);
@@ -555,7 +561,7 @@ int logfs_get_sb_device(struct file_system_type *type, int flags,
sb->s_op = &logfs_super_operations;
sb->s_flags = flags | MS_NOATIME;
- err = logfs_read_sb(sb);
+ err = logfs_read_sb(sb, sb->s_flags & MS_RDONLY);
if (err)
goto err1;