The system call returns the head of the robust futex list. The list head is stored
in the location pointed to by the head argument. When copying data between address
spaces use proper head storage size as it depends on an emulated ABI.
PR: 267616
MFC after: 3 days
The previous commit lost an implicit struct socket * cast. Use an
inline function instead as the macro is already rather long.
Fixes: e1401f7579 cxgbe: use standard sototcpcb() accessor macro to get socket's tcpcb
Sponsored by: Chelsio Communications
The inp_socket is cleared only in in_pcbdetach(), which for TCP is
always accompanied with inp_pcbfree(). An inpcb that went through
in_pcbfree() shall never be returned by any kind of pcb lookup.
Reviewed by: tuexen
Differential revision: https://reviews.freebsd.org/D37062
These functions tcp_notify(), tcp_drop_syn_sent() and tcp_mtudisc()
are called from tcp*_ctlinput*() right after successfull
in_pcblookup*(). They shall never get a pcb that is dropped.
The in_pcbdrop() KPI, which is used solely by TCP, allows to remove a
pcb from hash list and mark it as dropped. The comment suggests that
such pcb won't be returned by lookups. Indeed, every call to
in_pcblookup*() is accompanied by a check for INP_DROPPED. Do what
comment suggests: never return such pcbs and remove unnecessary checks.
Reviewed by: tuexen
Differential revision: https://reviews.freebsd.org/D37061
Add virt_to_phys() as a define to vtophys().
This is used by a wireless driver for dma related work; sigh.
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D37301
In addition to (*func) tasklet also seems to have a (*callback) with
a different argument. Add support for this and add tasklet_setup()
as well for support in more drivers.
The from_tasklet() definition is duplicated in the tree; hide it there
under #ifndef to avoid a re-definition. People should generally add
LinuxKPI bits to linuxkpi rather than private files if they also rely
on other LinuxKPI bits.
X-MFC: DO NOT MFC, space allocated by drivers not us.
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D37216
Add a static set of cpumasks for all (possible) cpus with only the one
indexed cpu enabled in each set.
This is needed for cpumask_of(_cpuid) which returns a cpumask (cpuset)
with only cpu _cpuid enabled and is used by one wireless driver at least.
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D37223
This adds the capability for a modular congestion control
to select which variant of ECN-capable-transport it wants to use
when sending out elegible segments. As an initial CC to utilize
this, DCTCP was selected.
Event: IETF 115 Hackathon
Reviewed By: tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D24869
Polarity inversion register was mistekanly filled with the value of
the direction configuration register.
Correct that.
Reviewed by: kd
Obtained from: Semihalf
Differential Revision: https://reviews.freebsd.org/D37262
If a -m argument is given to update, it is passed through to arc diff
when updating each review. Note that if an empty message is specified
via -m, arc diff will update the review without adding a note.
If an -m argument is not given, then the user's editor is invoked by
arc to supply a message for each review matching the previous
behavior.
This can be used to simplify the process for updating a set of
reviews, e.g.:
git checkout foo
git rebase main
git arc update -m "Rebase" main..
This will rebase the 'foo' branch and update the reviews for all
commits on the branch without invoking the user's editor separately
for each review.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D37260
These values come from section 7.7.11 ("ACS Extended Capability") of the
PCI Express Base Specification Revision 6.0, dated 16 Dec 2021.
MFC after: 1 week
Sponsored by: Chelsio Communications
Reviewed by: kib@
Differential Revision: https://reviews.freebsd.org/D37270
On arm64 with per-thread stack canaries enabled (the PERTHREAD_SSP
option), the compiler may load curthread->td_md.md_canary in function
prologues. This is not safe in data_abort(); see commit 2c10be9e06.
Thus, sanitizer runtimes must also avoid accessing the current thread's
canary.
Since SSP has limited utility in sanitizer runtimes, simply disable it
unconditionally to avoid unpleasant surprises in the future.
MFC after: 2 weeks
Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara, Inc.
With PERTHREAD_SSP configured, the compiler's stack-smashing protection
uses a per-thread canary value instead of a global value. The value is
stored in td->td_md.md_canary; the sp_el0 register always contains a
pointer to that value, and certain functions selected by the compiler
will store the canary value on the stack as a part of the function
prologue (and will verify the copy as part of the epilogue). In
particular, the thread structure may be accessed.
This happens to occur in data_abort(), which leads to the same problem
addressed by commit 2c10be9e06 ("arm64: Handle translation faults for
thread structures"). This commit fixes that directly, by disabling SSP
in data_abort() and a couple of related functions by using a function
attribute. It also moves the update of sp_el0 out of C code in case
the compiler decides to start checking the canary in pmap_switch()
someday.
A different solution might be to move the canary value to the PCB, which
currently lives on the kernel stack and isn't subject to the same
problem as thread structures (if only because guard pages inhibit
superpage promotion). However, there isn't any particular reason the
PCB has to live on the stack today; on amd64 it is embedded in struct
thread, reintroducing the same problem. Keeping the reference canary
value at the top of the stack is also rather dubious since it could be
clobbered by a sufficiently large stack overflow.
A third solution could be to go back to the approach of commit
5aa5420ff2, and modify UMA to use the direct map for thread structures
even if KASAN is enabled. But, transient promotions and demotions in
the direct map are possible too.
Reviewed by: alc, kib, andrew
MFC after: 1 month
Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D37255
Old versions of FreeBSD do not support using id 0 to refer to the
current pid for procctl, so pass getpid() explicitly.
Although this is not required in current FreeBSD branches I am merging
it to reduce differences with upstream.
Obtained from: OpenSSH commit 0f7e1eba5525
This is just a dummy enum and struct in order to make drivers compile
more happily as some parts are simply not hidden behind #ifdefs and
this avoids a longer-term maintenance problem.
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D37215
Add devm_request_irq() needed by a driver. Turns out all we need
is a wrapper with the right arguments to lkpi_request_irq().
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D37217
Add a memcpy variant which takes length of source and destination
buffers and a padding character in case there is free space in the
destination. This is used by a wireless driver.
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D37226
Most of the WME code has been there disabled for months. One of the
reasons was that it lead to crashes early on. It is now understood
that the crashes are independent event and we can enable WME.
Update the code and deal with the calls from net80211 and adjust the
updates to when mac80211 drivers expect them, coherently put it under
LKPI_80211_WME and enable the define locally.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
If this if_re(4) is causing problems then an updated driver from
the vendor can be found in the ports tree under net/realtek-re-kmod.
Reviewed by: debdrup, koobs, emaste
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D33677
dma accepts mail from a local Mail User Agent (MUA) and delivers it
locally or to a smarthost for delivery. dma does not accept inbound
mail (i.e., it does not listen on port 25) and is not intended to
provide the same functionality as a full MTA like postfix or sendmail.
It is intended for use cases such as delivering cron(8) mail. which
is the default configuration and usage of sendmail in the default
setup of the base system.
In order to switch the default from sendmail to dma, we teach
mailwrapper to fallback on dma directly if the mailer.conf file cannot
be opened.
We install by default a mailer.conf file which points at dma
We install a mailer.conf file for sendmail in the examples.
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D37035
- add a manual page for tcp_rack(4)
- link it in the tcp(4) and tcp_bbr(4) man pages
- hook it up to build in the Makefile
Reviewed by: pauamma
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D37209
In case local-unbound(8) fails for some reason, it could be useful
to have a basic resolv.conf(5) example in the manual page.
Reviewed by: karels, pauamma
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D37183
In order to use the shutdown command, the user must
have root privileges or be a member of the operator group.
PR: 266525
Reported by: Zsolt Udvari <uzsolt at uzsolt hu>
Reviewed by: pauamma
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D36688
It's still relatively uncommon to see C11 '<threads.h>' being used,
but it's worth documenting, especially since FreeBSD requires a
different library for C11 threads compared to glibc (part of '-lpthread')
or musl libc (included by default).
PR: 267551
Submitted by: Alois Klink <alois plus freebsd at aloisklink dot com>
Reviewed by: pauamma
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D37284
In an e-mail Brian Walden wrote that:
"GWRL stands for Gottfried W. R. Luderer, the author of cut(1) and
paste(1), probably around 1978. Those came either from PWB or USG,
as he worked with, or for, Berkley Tague. Thus they made their way
into AT&T commercial UNIX, first into System III and the into System
V, and that's why they are missing from early BSD releases as they
didn't get into Research UNIX until the 8th Edition."
So update the HISTORY and AUTHORS sections for cut(1) and paste(1).
[1] https://minnie.tuhs.org/pipermail/tuhs/2020-January/019955.html
Reviewed by: pauamma, imp
Obtained from: OpenBSD (in partial)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D36048
This will enable VM access to all ZFS feature automatically, only on a
newly installed or provisioned VM or cloud instance.
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D37283
If a zpool is created by makefs(8), its version is 5000, i.e., all
feature flags are off. Introduce an rc script to run `zpool upgrade`
over the assigned zpools on the first boot. This is useful to the
ZFS based VM images built from release(7).
Reviewed by: imp, markj, mav
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D37282
