This does not provide us all the functionality that
is available in Linux. But should be a start.
Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
The LINUX_DATAPATH C preprocessor symbol was originally meant to be used as
a signal for whether the Linux datapath module could be used, but it was
used as a proxy for a lot of other stuff that is really just Linux
specific. This commit switches all of these users to just test for
__linux__, which is more straightforward and should have the same result.
CC: Luigi Rizzo <rizzo@iet.unipi.it>
Signed-off-by: Ben Pfaff <blp@nicira.com>
We've seen a number of deadlocks in the tree since thread safety was
introduced. So far, all of these are self-deadlocks, that is, a single
thread acquiring a lock and then attempting to re-acquire the same lock
recursively. When this has happened, the process simply hung, and it was
somewhat difficult to find the cause.
POSIX "error-checking" mutexes check for this specific problem (and
others). This commit switches from other types of mutexes to
error-checking mutexes everywhere that we can, that is, everywhere that
we're not using recursive mutexes. This ought to help find problems more
quickly in the future.
There might be performance advantages to other kinds of mutexes in some
cases. However, the existing mutex type choices were just guesses, so I'd
rather go for easy detection of errors until we know that other mutex
types actually perform better in specific cases. Also, I did a quick
microbenchmark of glibc mutex types on my host and found that the
error checking mutexes weren't any slower than the other types, at least
when the mutex is uncontended.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
This commit changes the code such that arguments to thread-safety
macros are not ampersanded.
Signed-off-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit adds annotations for thread safety check. And the
check can be conducted by using -Wthread-safety flag in clang.
Co-authored-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
The worker process implementation isn't thread-safe and, once OVS
itself is threaded, it doesn't make much sense to have a worker
process anyway.
Signed-off-by: Ben Pfaff <blp@nicira.com>
getmntent_r() is a GNU extension so we test for its existence and just
disable this feature of system stats if it is not present, because this
feature is not very important.
Signed-off-by: Ben Pfaff <blp@nicira.com>
This is a straight search-and-replace, except that I also removed #include
<assert.h> from each file where there were no assert calls left.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
The ESX userspace looks quite a bit like linux, but has some key
differences which need to be specially handled in the build. To
distinguish between ESX and systems which use the linux datapath
module, this patch adds two new macros "ESX" and "LINUX_DATAPATH".
It uses these macros to disable building code on ESX which only
applies to a true Linux environment. In addition, it adds a new
route-table-stub implementation which is required for the build to
complete successfully on ESX.
Signed-off-by: Ethan Jackson <ethan@nicira.com>
"smap" is now the appropriate data structure for a string-to-string map.
Also changes ovsdb_datum_from_shash() into ovsdb_datum_from_smap() since
system-stats related code was the only client.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc.
Feature #10593
Signed-off-by: Raju Subramanian <rsubramanian@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Patch below fixes build on FreeBSD; tested on 10.0-CURRENT.
Signed-off-by: Edward Tomasz Napierala <trasz@FreeBSD.org>
Signed-off-by: Ben Pfaff <blp@nicira.com>
The function read_pidfile() will only return a PID if the process is
still running, so there's no reason to send a signal to check again.
Suggested-by: Andrew Evans <aevans@nicira.com>
This makes it possible to run tests that need access to installation
directories, such as the rundir, without having access to the actual
installation directories (/var/run is generally not world-writable), by
setting environment variables. This is not a good way to do things in
general--usually it would be better to choose the correct directories
at configure time--so for now this is undocumented.
This is intended to provide controllers enough information to determine
whether a switch is overloaded or busted, to enable them to spread load
fairly across a group of switches.
Feature #2421.
CC: Peter Balland <peter@nicira.com>
