iov_iter: Add mapping and discard iterator types
Add two new iterator types to iov_iter:
This walks through a set of pages attached to an address_space that
are pinned or locked, starting at a given page and offset and walking
for the specified amount of space. The facility to get a callback each
time a page is filled is provided.
This is useful for copying data from socket buffers to inodes in
This is a sink iterator that can only be used in READ mode and just
discards any data copied to it.
This can be used to discard any unwanted data a network filesystem is
sent by a server.
Signed-off-by: David Howells <firstname.lastname@example.org>
2 files changed