Stress options allow developers testing Open vSwitch to trigger behavior
that otherwise would occur only in corner cases. Developers and testers
can thereby more easily discover bugs that would otherwise manifest only
rarely or nondeterministically. Stress options may cause surprising
behavior even when they do not actually reveal bugs, so they should only be
enabled as part of testing Open vSwitch.
This commit implements the framework and adds a few example stress options.
This commit started from code written by Andrew Lambeth.
Suggested-by: Henrik Amren <henrik@nicira.com>
CC: Andrew Lambeth <wal@nicira.com>
All of these changes avoid using the same name for two local variables
within a same function. None of them are actual bugs as far as I can tell,
but any of them could be confusing to the casual reader.
The one in lib/ovsdb-idl.c is particularly brilliant: inner and outer
loops both using (different) variables named 'i'.
Found with GCC -Wshadow.
Adding a macro to define the vlog module in use adds a level of
indirection, which makes it easier to change how the vlog module must be
defined. A followup commit needs to do that, so getting these widespread
changes out of the way first should make that commit easier to review.
SSL, which will be added in an upcoming commit, requires some background
processing, which is best done in a "run" function in our architecture.
This commit adds stream_run() and stream_run_wait() and calls to them from
the places where they will be required.
This code is heavily based on the vconn code. Eventually we should make
the stream-based vconns (currently that's all of them) a wrapper around
streams, but I haven't done that yet.
SSL is not implemented yet.
