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-rw-r--r--fs/btrfs/fs.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/fs/btrfs/fs.c b/fs/btrfs/fs.c
new file mode 100644
index 0000000000..31c1648bc0
--- /dev/null
+++ b/fs/btrfs/fs.c
@@ -0,0 +1,98 @@
+// 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);
+ set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
+ }
+}
+
+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);
+ set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
+ }
+}
+
+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);
+ set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
+ }
+}
+
+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);
+ set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
+ }
+}