From: Omar Sandoval <osandov@xxxxxx>
We're finally going to add one of these for the free space tree, so
let's add the same nice helpers that we have for the incompat bits.
Signed-off-by: Omar Sandoval <osandov@xxxxxx>
---
fs/btrfs/ctree.h | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index aac314e14188..10388ac041b6 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -4113,6 +4113,40 @@ static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
return !!(btrfs_super_incompat_flags(disk_super) & flag);
}
+#define btrfs_set_fs_compat_ro(__fs_info, opt) \
+ __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
+
+static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
+ u64 flag)
+{
+ 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 %llu ro feature flag",
+ flag);
+ }
+ spin_unlock(&fs_info->super_lock);
+ }
+}
+
+#define btrfs_fs_compat_ro(fs_info, opt) \
+ __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
+
+static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
+{
+ struct btrfs_super_block *disk_super;
+ disk_super = fs_info->super_copy;
+ return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
+}
+
/*
* Call btrfs_abort_transaction as early as possible when an error condition is
* detected, that way the exact line number is reported.
--
2.5.1
--
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