157 struct lfs_config {  struct
164     int (*read)(const struct lfs_config *c, lfs_block_t block,  argument
170     int (*prog)(const struct lfs_config *c, lfs_block_t block,  argument
177     int (*erase)(const struct lfs_config *c, lfs_block_t block);  argument
181     int (*sync)(const struct lfs_config *c);  argument
186     int (*lock)(const struct lfs_config *c);  argument
190     int (*unlock)(const struct lfs_config *c);  argument
195     lfs_size_t read_size;
199     lfs_size_t prog_size;
205     lfs_size_t block_size;
209     lfs_size_t block_count;
217     int32_t block_cycles;
224     lfs_size_t cache_size;
230     lfs_size_t lookahead_size;
241     lfs_size_t compact_thresh;
245     void *read_buffer;
249     void *prog_buffer;
253     void *lookahead_buffer;
259     lfs_size_t name_max;
264     lfs_size_t file_max;
269     lfs_size_t attr_max;
275     lfs_size_t metadata_max;
284     lfs_size_t inline_max;
291     uint32_t disk_version;