Module media 

Helpers for the on-flash UBI structures in ubi-media.h.

Constants

HEADER_CRC 🔒

Offset of the CRC in both headers. The CRC covers the bytes before it.

HEADER_SIZE 🔒

Size of the erase counter header and the volume identifier header.

MAX_VOLUMES 🔒

Number of user volumes. Internal volumes have IDs from super::LAYOUT_VOLUME_ID on.

VERSION 🔒

The only UBI version.

Functions

array 🔒

Returns N bytes at offset.

be_u32 🔒

be_u64 🔒

check_crc 🔒

Checks the CRC at offset against the bytes before it.

checked_header 🔒

Returns the first header of data after checking its magic number and its CRC, in the order of the kernel.

field 🔒

Returns a FormatError::Field.

flag 🔒

Converts a flag that must be 0 or 1.

is_erased 🔒

Returns whether all bytes are 0xFF, the value of erased flash.

non_negative 🔒

Returns value if the kernel, which reads it as a signed 32-bit integer, sees a value that isn’t negative.

put 🔒

Copies bytes into buffer at offset.

seal_header 🔒

Stores the magic number, the version and the CRC of a header.