mtd/ubi/ubi-media.h

79  * eraseblock handling, and then re-sizes the volume, not vice-versa. This
136  * physical eraseblock. These values have to be the same for all physical
165  * @copy_flag: if this logical eraseblock was copied from another physical
166  *             eraseblock (for wear-leveling reasons)
170  * @lnum: logical eraseblock number
172  * @data_size: how many bytes of data this logical eraseblock contains
174  * @data_pad: how many bytes at the end of this physical eraseblock are not
176  * @data_crc: CRC checksum of the data stored in this logical eraseblock
185  * eraseblock to a new physical eraseblock. The global sequence counter is an
190  * There are 2 situations when there may be more than one physical eraseblock
191  * corresponding to the same logical eraseblock, i.e., having the same @vol_id
193  * eraseblock L and it is mapped to the physical eraseblock P.
197  * erasure, then L is written to,i.e. mapped to another physical eraseblock P1,
199  * physical eraseblocks P and P1 corresponding to the same logical eraseblock
209  * it is not enough to select the physical eraseblock with the higher sequence
212  * just select the physical eraseblock with lower sequence number, because the
218  * UBI uses the @copy_flag field to indicate that this logical eraseblock is a
221  * eraseblock of two (P or P1), the @copy_flag of the newer one (P1) is
224  * checksum is correct, this physical eraseblock is selected (P1). Otherwise
245  * eraseblock if this is a static volume. In case of dynamic volumes, it does
247  * data of the physical eraseblock was moved by the wear-leveling sub-system,
252  * how many bytes of data are stored in this eraseblock. For dynamic volumes,
254  * physical eraseblock was moved to another physical eraseblock for
322  * eraseblock to satisfy the requested alignment
332  * the layout volume. The layout volume consists of 2 logical eraseblock, each
337  * If the size of the logical eraseblock is large enough to fit
340  * logical eraseblock divided by sizeof(struct ubi_vtbl_record)).
349  * logical eraseblock size and @alignment. The alignment must be multiple to the