bulk_buffer.c File Reference

Functions
errval_t	bulk_buffer_map (struct bulk_buffer *buffer)
errval_t	bulk_buffer_unmap (struct bulk_buffer *buffer)
uint8_t	bulk_buffer_is_owner (struct bulk_buffer *buffer)
uint8_t	bulk_buffer_is_copy (struct bulk_buffer *buffer)
uint8_t	bulk_buffer_is_valid (struct bulk_buffer *buffer)
errval_t	bulk_buffer_change_state (struct bulk_buffer *buffer, enum bulk_buffer_state new_state)
errval_t	bulk_buffer_assign_cap (struct bulk_buffer *buffer, struct capref cap, size_t cap_offset)

Function Documentation

errval_t bulk_buffer_assign_cap	(	struct bulk_buffer *	buffer,
		struct capref	cap,
		size_t	cap_offset
	)

Sets a cap + offset pair for a buffer.

Parameters

buffer	the buffer
cap	cap to assign
cap_offset	offset in the cap

errval_t bulk_buffer_change_state	(	struct bulk_buffer *	buffer,
		enum bulk_buffer_state	new_state
	)

changes the state of the buffer and adjust the mappings accordingly

Parameters

buffer	the buffer to change the state
state	new state to transition the buffer to

uint8_t bulk_buffer_is_copy

(

struct bulk_buffer *

buffer

)

checks if the buffer is a read only copy

Parameters

buffer

the buffer to check

Returns

true if the buffer is a read only copy false if the buffer is not a copy

uint8_t bulk_buffer_is_owner

(

struct bulk_buffer *

buffer

)

checks if the buffer is owned by the calling domain

Parameters

buf	buffer to check for ownership

uint8_t bulk_buffer_is_valid

(

struct bulk_buffer *

buffer

)

checks if the buffer is valid

Parameters

buffer

the buffer to check

Returns

true if the buffer is valid false if the buffer is not valid

errval_t bulk_buffer_map

(

struct bulk_buffer *

buffer

)

does the mapping of the buffer by filling the backing memobj with the frame and faulting on it. This is a no-op in full trusted mode.

Parameters

buf	the buffer to map

Note: The new state of the buffer as well as the backing capability must be set in the buffer struct.

errval_t bulk_buffer_unmap

(

struct bulk_buffer *

buffer

)

does the unmapping of a single buffer according to the trust level,

• if the channel is fully trusted, this results in a no-op.
• otherwise, the mapping is removed

This function does not revoke or delete any capabilities

Parameters

buf	the buffer to unmap