1 files changed, 94 insertions, 0 deletions
diff --git a/fs/btrfs/fs.c b/fs/btrfs/fs.c
new file mode 100644
index 000000000000..5553e1f8afe8
--- /dev/null
+++ b/fs/btrfs/fs.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "messages.h"
+#include "ctree.h"
+#include "fs.h"
+#include "accessors.h"
+
+void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag,
+			     const char *name)
+{
+	struct btrfs_super_block *disk_super;
+	u64 features;
+
+	disk_super = fs_info->super_copy;
+	features = btrfs_super_incompat_flags(disk_super);
+	if (!(features & flag)) {
+		spin_lock(&fs_info->super_lock);
+		features = btrfs_super_incompat_flags(disk_super);
+		if (!(features & flag)) {
+			features |= flag;
+			btrfs_set_super_incompat_flags(disk_super, features);
+			btrfs_info(fs_info,
+				"setting incompat feature flag for %s (0x%llx)",
+				name, flag);
+		}
+		spin_unlock(&fs_info->super_lock);
+	}
+}
+
+void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag,
+			       const char *name)
+{
+	struct btrfs_super_block *disk_super;
+	u64 features;
+
+	disk_super = fs_info->super_copy;
+	features = btrfs_super_incompat_flags(disk_super);
+	if (features & flag) {
+		spin_lock(&fs_info->super_lock);
+		features = btrfs_super_incompat_flags(disk_super);
+		if (features & flag) {
+			features &= ~flag;
+			btrfs_set_super_incompat_flags(disk_super, features);
+			btrfs_info(fs_info,
+				"clearing incompat feature flag for %s (0x%llx)",
+				name, flag);
+		}
+		spin_unlock(&fs_info->super_lock);
+	}
+}
+
+void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag,
+			      const char *name)
+{
+	struct btrfs_super_block *disk_super;
+	u64 features;
+
+	disk_super = fs_info->super_copy;
+	features = btrfs_super_compat_ro_flags(disk_super);
+	if (!(features & flag)) {
+		spin_lock(&fs_info->super_lock);
+		features = btrfs_super_compat_ro_flags(disk_super);
+		if (!(features & flag)) {
+			features |= flag;
+			btrfs_set_super_compat_ro_flags(disk_super, features);
+			btrfs_info(fs_info,
+				"setting compat-ro feature flag for %s (0x%llx)",
+				name, flag);
+		}
+		spin_unlock(&fs_info->super_lock);
+	}
+}
+
+void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag,
+				const char *name)
+{
+	struct btrfs_super_block *disk_super;
+	u64 features;
+
+	disk_super = fs_info->super_copy;
+	features = btrfs_super_compat_ro_flags(disk_super);
+	if (features & flag) {
+		spin_lock(&fs_info->super_lock);
+		features = btrfs_super_compat_ro_flags(disk_super);
+		if (features & flag) {
+			features &= ~flag;
+			btrfs_set_super_compat_ro_flags(disk_super, features);
+			btrfs_info(fs_info,
+				"clearing compat-ro feature flag for %s (0x%llx)",
+				name, flag);
+		}
+		spin_unlock(&fs_info->super_lock);
+	}
+}