This new function is a simple helper that creates a new ofpbuf with some
initial contents plus a caller-specified amount of headroom.
This will be used in upcoming commits.
Acked-by: Jesse Gross <jesse@nicira.com>
This new function is useful in a situation where a small stack-allocated
buffer is usually appropriate but occasionally it must be expanded.
Acked-by: Jesse Gross <jesse@nicira.com>
ovs_queue doesn't seem very useful; it's just a singly-linked list. It's
more generally useful to use a general-purpose "struct list" for lists of
packets, so this commit adds such a member to "struct ofpbuf" and shifts
the existing users to use it.
