#include "locking.h"
#include "free-space-tree.h"
#include "transaction.h"
+#include "sysfs.h"
static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
}
btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE);
+ btrfs_sysfs_feature_update(fs_info,
+ BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE, FEAT_COMPAT_RO);
+
fs_info->creating_free_space_tree = 0;
ret = btrfs_commit_transaction(trans, tree_root);
return PTR_ERR(trans);
btrfs_clear_fs_compat_ro(fs_info, FREE_SPACE_TREE);
+ btrfs_sysfs_feature_update(fs_info,
+ BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE, FEAT_COMPAT_RO);
+
fs_info->free_space_root = NULL;
ret = clear_free_space_tree(trans, free_space_root);
if (range->compress_type == BTRFS_COMPRESS_LZO) {
btrfs_set_fs_incompat(root->fs_info, COMPRESS_LZO);
+ btrfs_sysfs_feature_update(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO, FEAT_INCOMPAT);
}
ret = defrag_count;
btrfs_free_path(path);
btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL);
+ btrfs_sysfs_feature_update(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL, FEAT_INCOMPAT);
btrfs_end_transaction(trans, root);
out:
mnt_drop_write_file(file);
#include "dev-replace.h"
#include "free-space-cache.h"
#include "backref.h"
+#include "sysfs.h"
#include "tests/btrfs-tests.h"
#include "qgroup.h"
btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM);
btrfs_set_fs_incompat(info, COMPRESS_LZO);
+ btrfs_sysfs_feature_update(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO,
+ FEAT_INCOMPAT);
no_compress = 0;
} else if (strncmp(args[0].from, "no", 2) == 0) {
compress_type = "no";
BTRFS_FEAT_ATTR_INCOMPAT(raid56, RAID56);
BTRFS_FEAT_ATTR_INCOMPAT(skinny_metadata, SKINNY_METADATA);
BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES);
+BTRFS_FEAT_ATTR_COMPAT_RO(free_space_tree, FREE_SPACE_TREE);
static struct attribute *btrfs_supported_feature_attrs[] = {
BTRFS_FEAT_ATTR_PTR(mixed_backref),
BTRFS_FEAT_ATTR_PTR(raid56),
BTRFS_FEAT_ATTR_PTR(skinny_metadata),
BTRFS_FEAT_ATTR_PTR(no_holes),
+ BTRFS_FEAT_ATTR_PTR(free_space_tree),
NULL
};
return error;
}
+
+/*
+ * Change per-fs features in /sys/fs/btrfs/UUID/features to match current
+ * values in superblock. Call after any changes to incompat/compat_ro flags
+ */
+void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
+ u64 bit, enum btrfs_feature_set set)
+{
+ struct btrfs_fs_devices *fs_devs;
+ struct kobject *fsid_kobj;
+ u64 features;
+ int ret;
+
+ if (!fs_info)
+ return;
+
+ features = get_features(fs_info, set);
+ ASSERT(bit & supported_feature_masks[set]);
+
+ fs_devs = fs_info->fs_devices;
+ fsid_kobj = &fs_devs->fsid_kobj;
+
+ /*
+ * FIXME: this is too heavy to update just one value, ideally we'd like
+ * to use sysfs_update_group but some refactoring is needed first.
+ */
+ sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
+ ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
+}
+
static int btrfs_init_debugfs(void)
{
#ifdef CONFIG_DEBUG_FS
#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
- BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature)
+ BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
struct kobject *parent);
int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
+void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
+ u64 bit, enum btrfs_feature_set set);
+
#endif /* _BTRFS_SYSFS_H_ */
return;
btrfs_set_fs_incompat(info, RAID56);
+ btrfs_sysfs_feature_update(info, BTRFS_FEATURE_INCOMPAT_RAID56,
+ FEAT_INCOMPAT);
}
#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \