At the end of both mevent_add() and mevent_update(), mevent_notify()
is called to wakeup the I/O thread, that will call kevent(changelist)
to update the kernel.
A race condition is possible where the client calls mevent_add() and
mevent_update(EV_ENABLE) before the I/O thread has the chance to wake
up and call mevent_build()+kevent(changelist) in response to mevent_add().
The mevent_add() is therefore ignored by the I/O thread, and
kevent(fd, EV_ENABLE) is called before kevent(fd, EV_ADD), resuliting
in a failure of the kevent(fd, EV_ENABLE) call.
PR: 241808
Reviewed by: jhb, markj
MFC with: r354288
Differential Revision: https://reviews.freebsd.org/D22286
via 'diskinfo -v'. This avoids the need to track it down via CAM,
and should also work for disks that don't use CAM. And since it's
inherited thru the GEOM hierarchy, in most cases one doesn't need
to walk the GEOM graph either, eg you can use it on a partition
instead of disk itself.
Reviewed by: allanjude, imp
Sponsored by: Klara Inc
Differential Revision: https://reviews.freebsd.org/D22249
Mergeable rx buffers is a virtio-net feature that allows the hypervisor
to use multiple RX descriptor chains to receive a single receive packet.
Without this feature, a TSO-enabled guest is compelled to publish only
64K (or 32K) long chains, and each of these large buffers is consumed
to receive a single packet, even a very short one. This is a waste of
memory, as a RX queue has room for 256 chains, which means up to 16MB
of buffer memory for each (single-queue) vtnet device.
With the feature on, the guest can publish 2K long chains, and the
hypervisor will merge them as needed.
This change also enables the feature in the netmap backend, which
supports virtio-net offloads. We plan to add support for the
tap backend too.
Note that differently from QEMU/KVM, here we implement one-copy receive,
while QEMU uses two copies.
Reviewed by: jhb
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D21007
If a VM is flooded with more ingress packets than the guest OS
can handle, the current virtio-net code will keep reading those
packets and drop most of them as no space is available in the
receive queue. This is an undesirable receive livelock, which
is a waste of CPU and memory resources and potentially opens to
DoS attacks.
With this change, virtio-net uses the new netbe_rx_disable()
function to disable ingress operation in the backend while the
guest is short on RX buffers. Once the guest makes more buffers
available to the RX virtqueue, ingress operation is enabled again
by calling netbe_rx_enable().
Reviewed by: bryanv, jhb
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20987
The valectl(4) program is used to manage vale(4) switches.
Add it to the system commands so that it can be used right away.
This program was previously called vale-ctl, and stored in
tools/tools/netmap
Reviewed by: hrs, bcr, lwhsu, kevans
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D22146
whitespace, and also reorder the fields so they are easier to read on
an 80 column display (the lines wrapped even before these changes).
Also fix non-standard nomenclature in the Caps code, and update the
man page.
Reported by: rpokala
standard nomenclature of "device" and "vendor" with the "sub" variants.
This changes the printed format, so anything that scrapes and parses
this will need to be adapted. No compatibility shims are provided,
but this will not be MFC'd.
Reviewed by: jhb, emaste, gtetlow
Approved by: jhb, emaste, gtetlow
Pass the list of user selected disks from zfsboot to bootconfig so that
the latter doesn't rely on ESP autodetection that apparently fails for
some cases, e.g. memstick installation with nvme (boot) and sata drives.
While here, fix printing of debug messages in bootconfig.
Reviewed by: bcran, imp, tsoome
Differential Revision: https://reviews.freebsd.org/D21930
This warning (comparing a pointer against a zero character literal
rather than NULL) has existed since GCC 7.1.0, and was recently added to
Clang trunk.
Almost all of these are harmless, except for fwcontrol's str2node, which
needs to both guard against dereferencing a NULL pointer (though in
practice it appears none of the callers will ever pass one in), as well
as ensure it doesn't parse the empty string as node 0 due to strtol's
awkward interface.
Submitted by: James Clarke <jtrc27@jrtc27.com>
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D21914
'quarterly' package sets do not exist for head, so explicitly
install the 'latest' configuration file there. Otherwise,
fall back to the original conditional evaluation to determine
if the 'latest' or 'quarterly' configuration file should be
installed.
Reported by: manu
Reviewed by: manu
MFC after: 3 days
Sponsored by: Rubicon Communications, LLC (Netgate)
It seems reasonable to allow, for instance:
$ certctl list
# reviews output -- ah, yeah, I don't trust that one
$ certctl blacklist ce5e74ef.0
$ certctl rehash
We can unambiguously determine what cert "ce5e74ef.0" refers to, and we've
described it to them in `certctl list` output -- I see little sense in
forcing another level of filesystem inspection to determien what cert file
this physically corresponds to.
This change allows to specify a watchdog(9) timeout for a system
shutdown. The timeout is activated when the watchdogd daemon is
stopped. The idea is to a prevent any indefinite hang during late
stages of the shutdown. The feature is implemented in rc.d/watchdogd,
it builds upon watchdogd -x option.
Note that the shutdown timeout is not actiavted when the watchdogd
service is individually stopped by an operator. It is also not
activated for the 'shutdown' to the single-user mode. In those cases it
is assumed that the operator knows what they are doing and they have
means to recover the system should it hang.
Significant subchanges and implementation details:
- the argument to rc.shutdown, completely unused before, is assigned to
rc_shutdown variable that can be inspected by rc scripts
- init(8) passes "single" or "reboot" as the argument, this is not
changed
- the argument is not mandatory and if it is not set then rc_shutdown is
set to "unspecified"
- however, the default jail management scripts and jail configuration
examples have been updated to pass "jail" to rc.shutdown, just in case
- the new timeout can be set via watchdogd_shutdown_timeout rc option
- for consistency, the regular timeout can now be set via
watchdogd_timeout rc option
- watchdogd_shutdown_timeout and watchdogd_timeout override timeout
specifications in watchdogd_flags
- existing configurations, where the new rc options are not set, should
keep working as before
I am not particularly wed to any of the implementation specifics.
I am open to changing or removing any of them as long as the provided
functionality is the same (or very close) to the proposed one.
For example, I think it can be implemented without using watchdogd -x,
by means of watchdog(1) alone. In that case there would be a small
window between stopping watchdogd and running watchdog, but I think that
that is acceptable.
Reviewed by: bcr (man page changes)
MFC after: 5 weeks
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D21221
installer when installing the system on a ZFS root filesystem.
For arm64, zfs_load="YES" does not add opensolaris.ko as a kld
dependency, so add it explicitly to prevent boot-time failures
out-of-box.
PR: 240478
MFC after: 3 days
Sponsored by: Rubicon Communications, LLC (Netgate)
This commit add support for certctl in mergemaster and etcupdate. Both will
either rehash or prompt for rehash as new certificates are
trusted/blacklisted.
This work was done primarily by allanjude@, with minor contributions by
myself.
No objection from: secteam
Differential Revision: https://reviews.freebsd.org/D17389
This is a simple utility to hash all trusted on the system into
/etc/ssl/certs. It also allows the user to blacklist certificates they do
not trust.
This work was done primarily by allanjude@, with minor contributions by
myself.
No objection from: secteam
Differential Revision: https://reviews.freebsd.org/D16857
This avoids PATH conflicts with a real httpd, as a user will likely almost
always prefer the more fully-featured httpd. This also lines up with the
historical name of the program.
picobsd/tinyware has had this compact HTTPD server for a long time, and some
people do use it. Move it out into usr.sbin well in advance of any action
being taken on picobsd.
This has been gated behind an HTTPD option defaulted to *off*, primarily for
two reasons:
1.) This code likely needs a good audit, as it's been living off in picobsd
land for a long time, and
2.) We don't currently ship an httpd and this may not be a welcome surprise.
Reviewed by: eugen
Differential Revision: https://reviews.freebsd.org/D21724
Extend the net backend interface with two functions, namely netbe_rx_disable()
and netbe_rx_enable(), which can be used by the net device emulators to stop
the backend from invoking the receive callback. This is useful for device
emulators, i.e., on hardware resets or to implement receive backpressure.
The mevent module has been extendede to support the addition of a disabled
event. To prevent race conditions, the net backends will start with receive
operation disabled. A follow-up patch will use the new functionalities in
the virtio-net device.
Reviewed by: jhb, markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D20973
- split synopsis into separate options that can't be used together
- sort options
- fix (style) issues reported by mandoc lint
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D21710
This commit adds two new extensions to crontab, ported from OpenBSD:
- -n: suppress mail on succesful run
- -q: suppress logging of command execution
The -q option appears decades old, but -n is relatively new. The
original proposal by Job Snijder can be found here [1], and gives very
convincing reasons for inclusion in base.
This patch is a nearly identical port of OpenBSD cron for -q and -n
features. It is written to follow existing conventions and style of the
existing codebase.
Example usage:
# should only send email, but won't show up in log
* * * * * -q date
# should not send email
* * * * * -n date
# should not send email or log
* * * * * -n -q date
# should send email because of ping failure
* * * * * -n -q ping -c 1 5.5.5.5
[1]: https://marc.info/?l=openbsd-tech&m=152874866117948&w=2
PR: 237538
Submitted by: Naveen Nathan <freebsd_t.lastninja.net>
Reviewed by: bcr (manpages)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D20046
`freebsd-update updatesready' can be used to check if there are any pending
fetched updates that can be installed.
`freebsd-update showconfig' writes freebsd-update's configuration to
stdout.
This also changes the exit code of `freebsd-update install' to 2 in case
there are no updates pending to be installed and there wasn't a fetch phase
in the same invocation. This allows scripts to tell apart these error
conditions without breaking existing jail managers.
See freebsd-update(8) for details.
PR: 240757, 240177, 229346
Reviewed by: manpages (bcr), sectam (emaste), yuripv
Differential Revision: https://reviews.freebsd.org/D21473
message:
On non-x86 systems, use "quarterly" packages.
x86 architectures have "latest" package builds on stable/*, so keep using
those (they'll get switched over to "quarterly" during releases).
The original commit was a direct commit to stable/12, as at the time it
was presumed it would not be necessary for head. However, when it is time
to create a releng branch or switch from PRERELEASE/STABLE to BETA/RC, the
pkg(7) Makefile needs further adjusting. This commit includes those
further adjustments, evaluating the BRANCH variable from release/Makefile
to determine the pkg(7) repository to use.
MFC after: immediate (if possible)
Sponsored by: Rubicon Communications, LLC (Netgate)
igor follows American style guides in the belief that abbreviations i.e.
and e.g. are always followed by a comma. Make that change now so that
future updates to freebsd-update.8 do not complain about this.
Submitted by: grembo
Event: EuroBSDCon Norway FreeBSD DevSummit
log daemon facility now that daemon(8) has syslog support which defaults to
daemon facility, info priority
Reviewed by: bapt
Approved by: bapt
Differential Revision: https://reviews.freebsd.org/D21561
pages to page as necessary.
To restore historic BSD behaviour add the following to ntp.conf:
rlimit memlock 32
Discussed on: freebsd-current@ between Sept 6-9, 2019
Reported by: Users using ASLR with stack gap != 0
Reviewed by: ian, kib, rgrimes (all previous versions)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D21581
This commit fixes bug: command "jail -r" didn't trigger pre/post stop
commands (and others) defined in config file if jid is specified insted of
name. Also it adds basic tests for usr.sbin/jail to avoid regression.
Reviewed by: jamie, kevans, ray
MFC after: 5 days
Differential Revision: https://reviews.freebsd.org/D21328
This only lists the changed type and not other attributes so that it
matches the behavior of -C as done in r66747 for fmtree. The NetBSD
-ff implementation was copied from fmtree.
Reviewed by: imp
MFC after: 2 weeks
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D21623
location.
With newer import of libedit, the path to be able to access readline/readline.h
will also include header which name will conflict with some expected by ntp in
another path and end up breaking the build.
Setting the B_INVALONERR flag before a synchronous write causes the buf
cache to forcibly invalidate contents if the write fails (BIO_ERROR).
This is intended to be used to allow layers above the buffer cache to make
more informed decisions about when discarding dirty buffers without
successful write is acceptable.
As a proof of concept, use in msdosfs to handle failures to mark the on-disk
'dirty' bit during rw mount or ro->rw update.
Extending this to other filesystems is left as future work.
PR: 210316
Reviewed by: kib (with objections)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D21539
