158 struct lfs_config {  struct
165     int (*read)(const struct lfs_config *c, lfs_block_t block,  argument
171     int (*prog)(const struct lfs_config *c, lfs_block_t block,  argument
178     int (*erase)(const struct lfs_config *c, lfs_block_t block);  argument
182     int (*sync)(const struct lfs_config *c);  argument
187     int (*lock)(const struct lfs_config *c);  argument
191     int (*unlock)(const struct lfs_config *c);  argument
196     lfs_size_t read_size;
200     lfs_size_t prog_size;
206     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;
234     void *read_buffer;
238     void *prog_buffer;
243     void *lookahead_buffer;
249     lfs_size_t name_max;
254     lfs_size_t file_max;
259     lfs_size_t attr_max;
265     lfs_size_t metadata_max;
272     uint32_t disk_version;