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Commit 1abfbcdf authored by Omar Sandoval's avatar Omar Sandoval Committed by Chris Mason
Browse files

Btrfs: add helpers for read-only compat bits 



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.
While we're add it, also add helpers to clear the bits.

Reviewed-by: default avatarJosef Bacik <jbacik@fb.com>
Signed-off-by: default avatarOmar Sandoval <osandov@fb.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 0f331229

fs/btrfs/ctree.h

+82 −0
Original line number Diff line number Diff line
@@ -4100,6 +4100,30 @@ static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 
	}

}



#define btrfs_clear_fs_incompat(__fs_info, opt) \

	__btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)



static inline void __btrfs_clear_fs_incompat(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_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 %llu feature flag",

					 flag);

		}

		spin_unlock(&fs_info->super_lock);

	}

}



#define btrfs_fs_incompat(fs_info, opt) \

	__btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
@@ -4110,6 +4134,64 @@ 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_clear_fs_compat_ro(__fs_info, opt) \

	__btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)



static inline void __btrfs_clear_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, "clearing %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.