dim [Sat, 15 Aug 2020 22:58:07 +0000 (22:58 +0000)]
Temporarily disable libunwind's FrameHeaderCache, until there is a
resolution for <https://bugs.llvm.org/show_bug.cgi?id=47181>.
The cache implementation depends on dl_iterate_phdr(3) ensuring that its
callbacks are not called simultaneously for multiple threads, but that
is only the case for the dl_iterate_phdr() implementation in rtld.
In a statically linked executable, libc's dl_iterate_phdr() is used,
which does no such locking. If multiple threads then call into the
unwinder at the same time, it is possible to trigger a segfault.
In particular, the statically linked lld which is built during the
cross-tools stage can segfault in this way, because it starts multiple
worker threads that can exit in parallel. Since our pthread_exit(3)
invokes the unwinder, it will therefore call into it in parallel too.
cem [Sat, 15 Aug 2020 19:45:50 +0000 (19:45 +0000)]
witness(4): Print stack of prior observed lock order on reversal
The first time Witness observes a lock order between two locks, it records
the caller's stack. On detected reversal, print out that previous observed
stack. It is quite possible that the reported "LOR" is the correct
ordering, and the violation was the observed earlier ordering.
cem [Sat, 15 Aug 2020 18:46:26 +0000 (18:46 +0000)]
pcg-c: Add 'static' to inline function definitions
Make the inlines static to avoid kernel build failure with Clang 11 on i386.
(The issue was not observed with Clang 10, currently in tree; reproduction
depends on compiler inlining choices.)
The compiler may choose not to inline 'bare' C inlines, and in that case
expects a symbol of the same name will be available. It does not
automatically define that symbol at use, because of traditional C linking
semantics. (In contrast, C++ does define it, and then deduplicates redundant
definitions at link). As we do not instantiate the C99 inline ('extern
inline ...;'), the linker errors with "undefined symbol."
mhorne [Sat, 15 Aug 2020 15:06:39 +0000 (15:06 +0000)]
arm64: parse HWCAP values using user_cpu_desc
The hard work of parsing fields per-CPU, handling heterogeneous
features, and excluding features from userspace is already done by
update_special_regs. We can build our set of HWCAPs from the result.
This exposed a small bug in update_special_regs, in which the
generated bitmask was not wide enough, and as a result some bits
weren't being exposed in user_cpu_desc. Fix this.
While here, adjust some formatting.
Reviewed by: andrew
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26069
mhorne [Sat, 15 Aug 2020 14:57:53 +0000 (14:57 +0000)]
arm64: update instruction set attribute register definitions
This adds definitions for the latest additions to the AA64ISAR[01] ID
registers. This brings these registers in sync with ARMv8.6 initial spec
release.
An future change will parse many of these fields for HWCAP features.
Reviewed by: andrew, manu, markj (all previous versions)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26029
hrs [Sat, 15 Aug 2020 07:19:37 +0000 (07:19 +0000)]
- Update to Unicode CLDR v35 (Unicode 12.0).
- Update tools/tools/locale to add make targets to automatically
generate locale source files. With this change, just typing
"make obj && make -j4" will rebuild them. Check README for more details.
- Fix issues in ja_JP ctypedef and range specification support
in utf8-rollup.pl.
- Add a temporary patch for UnicodeData.txt to fix code ranges of
CJK Ideograph Extension A and Extension B.
- tools/cldr2def.pl:
Use eucJP for ja_JP ctypedef because eucJP is not compatible with UTF-8.
- tools/convert_map.pl:
Add a verbose error message.
- tools/utf8-rollup.pl:
Normalize entries to use Unicode, not UTF-8.
lwhsu [Sat, 15 Aug 2020 03:26:00 +0000 (03:26 +0000)]
Remove redeclaration found by gcc build
Reviewed by: Jacob Keller <jacob.e.keller@intel.com>
Suggested editing from: Krzysztof Galazka <krzysztof.galazka@intel.com>
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25954
jah [Fri, 14 Aug 2020 21:37:38 +0000 (21:37 +0000)]
kenv: avoid sleepable alloc for integer tunables
Avoid performing a potentially-blocking malloc for kenv lookups that will only
perform non-destructive integer conversions on the returned buffer. Instead,
perform the strtoq() in-place with the kenv lock held.
While here, factor the logic around kenv_lock acquire and release into
kenv_acquire() and kenv_release(), and use these functions for some light
cleanup. Collapse getenv_string_buffer() into kern_getenv(), as the former
no longer has any other callers and the only additional task performed by
the latter is a WITNESS check that hasn't been useful since r362231.
melifaro [Fri, 14 Aug 2020 21:29:56 +0000 (21:29 +0000)]
Simplify dom_<rtattach|rtdetach>.
Remove unused arguments from dom_rtattach/dom_rtdetach functions and make
them return/accept 'struct rib_head' instead of 'void **'.
Declare inet/inet6 implementations in the relevant _var.h headers similar
to domifattach / domifdetach.
Add rib_subscribe_internal() function to accept subscriptions to the rnh
directly.
markj [Fri, 14 Aug 2020 14:50:41 +0000 (14:50 +0000)]
Rename the pipe_map field of struct pipe.
This is to avoid conflicts with a upcoming macro. pipe_pages is a
more accurate name since the field tracks pages wired into the kernel as
part of a process-to-process copy operation.
Reviewed by: alc, kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
arichardson [Fri, 14 Aug 2020 09:45:41 +0000 (09:45 +0000)]
crunchgen: use pwd -P without env
The -P flag is required by POSIX so we don't have to care whether pwd is
a shell builtin or not. This also allows removing pwd from the list of
bootstrap tools since all shells we care about for building have a
builtin pwd command. This effectively reverts r364190.
manu [Fri, 14 Aug 2020 08:48:17 +0000 (08:48 +0000)]
linuxkpi: Add a few wait_bit functions
The linux function does a lot more than that as multiple waitqueue could be fetch
from a static table based on the hash of the argument but since in DRM it's only used
in one place just add a single variable.
We will probably need to change that in the futur but it's ok with DRM even with current
linux.
Reviewed by: hselasky
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26054
kevans [Fri, 14 Aug 2020 02:40:17 +0000 (02:40 +0000)]
Properly disable LUA_USE_DLOPEN for bootstrap flua
flua does have some specific bits that will include luaconf.h, but the
definition of LUA_USE_DLOPEN for those won't matter. This belongs in liblua
instead.
To expand on my previous commit, which was a little sparse with details,
it's not really safe to allow LUA_USE_DLOPEN with host lib paths being used.
The host system could have an entirely different lua version and this could
cause us to crash and burn.
If we want to revive this later, we need to make sure to define c module
paths inside OBJDIR that are compiled against whatever version we've
bootstrapped.
bdrewery [Fri, 14 Aug 2020 00:18:18 +0000 (00:18 +0000)]
syslog(3): Send proper NILVALUE if gethostname(3) fails.
RFC5424 defines NILVALUE as '-'. Replace its usage with a macro and
separate out the fields to be more clear. fputs(3) is used in some
places to avoid hiding possible format string problems in a macro.
bdrewery [Thu, 13 Aug 2020 22:06:27 +0000 (22:06 +0000)]
lagg: Avoid adding a port to a lagg device being destroyed.
The lagg_clone_destroy() handles detach and waiting for ifconfig callers
to drain already.
This narrows the race for 2 panics that the tests triggered. Both were a
consequence of adding a port to the lagg device after it had already detached
from all of its ports. The link state task would run after lagg_clone_destroy()
free'd the lagg softc.
cem [Thu, 13 Aug 2020 20:48:14 +0000 (20:48 +0000)]
Add prng(9) API
Add prng(9) as a replacement for random(9) in the kernel.
There are two major differences from random(9) and random(3):
- General prng(9) APIs (prng32(9), etc) do not guarantee an
implementation or particular sequence; they should not be used for
repeatable simulations.
- However, specific named API families are also exposed (for now: PCG),
and those are expected to be repeatable (when so-guaranteed by the named
algorithm).
Some minor differences from random(3) and earlier random(9):
- PRNG state for the general prng(9) APIs is per-CPU; this eliminates
contention on PRNG state in SMP workloads. Each PCPU generator in an
SMP system produces a unique sequence.
- Better statistical properties than the Park-Miller ("minstd") PRNG
(longer period, uniform distribution in all bits, passes
BigCrush/PractRand analysis).
- Faster than Park-Miller ("minstd") PRNG -- no division is required to
step PCG-family PRNGs.
For now, random(9) becomes a thin shim around prng32(). Eventually I
would like to mechanically switch consumers over to the explicit API.
melifaro [Thu, 13 Aug 2020 18:35:29 +0000 (18:35 +0000)]
Move rtzone handling code to net/route_ctl.c
After moving the route control plane code from net/route.c,
all rtzone users ended up being in net/route_ctl.c.
Move uma(9) rtzone setup/teardown code to net/route_ctl.c as well
to have everything in a single place.
While here, remove custom initializers from the zone.
It was added originally to avoid setup/teardown of costy per-cpu couters.
With these counters removed, the only remaining job was avoiding rte mutex
setup/teardown. Mutex setup is relatively cheap. Additionally, this mutex
will soon be removed. With that in mind, there is no sense in keeping
custom zone callbacks.
rscheff [Thu, 13 Aug 2020 16:38:51 +0000 (16:38 +0000)]
TCP Cubic: After leaving slowstart fix unintended cwnd jump.
Initializing K to zero in D23655 introduced a miscalculation,
where cwnd would suddenly jump to cwnd_max instead of gradually
increasing, after leaving slow-start.
Properly calculating K instead of resetting it to zero resolves
this issue. Also making sure, that cwnd is recalculated at the
earliest opportunity once slow-start is over.
rscheff [Thu, 13 Aug 2020 16:30:09 +0000 (16:30 +0000)]
Improve SACK support code for RFC6675 and PRR
Adding proper accounting of sacked_bytes and (per-ACK)
delivered data to the SACK scoreboard. This will
allow more aspects of RFC6675 to be implemented as well
as Proportional Rate Reduction (RFC6937).
Prior to this change, the pipe calculation controlled with
net.inet.tcp.rfc6675_pipe was also susceptible to incorrect
results when more than 3 (or 4) holes in the sequence space
were present, which can no longer all fit into a single
ACK's SACK option.
mhorne [Thu, 13 Aug 2020 14:21:05 +0000 (14:21 +0000)]
Enable interrupts while handling traps
I observed hangs post-r362977 in QEMU with -smp 2, in which one thread
would acquire write access to an rm_lock (sysctllock) and get stuck
waiting in smp_rendezvous_cpus while the other CPU was servicing a trap.
The other thread was waiting for read access to the same lock, thus
causing deadlock.
It's clear that this is just one symptom of a larger problem. The
general expectation of MI kernel code is that interrupts are enabled.
Violating this assumption will at best create some additional latency,
but otherwise might cause locking or other unforeseen issues. All other
architectures do so for some subset of trap values, but this somehow got
missed in the RISC-V port. Enable interrupts now during kernel page
faults and for all user trap types.
The code in exception.S already knows to disable interrupts while
handling the return from exception, so there are no changes required
there.
arichardson [Thu, 13 Aug 2020 14:14:51 +0000 (14:14 +0000)]
Make bsd.linker.mk work with the MacOS linker
This is not strictly required for crossbuilding but having lots of warnings
from bsd.linker.mk in the output was making it hard to see the actual
warning messages.
arichardson [Thu, 13 Aug 2020 14:14:46 +0000 (14:14 +0000)]
Add pwd to the list of tools that are linked to $WORLDTMP/legacy
After r364166 and r364174, crunchgen needs a pwd binary in $PATH instead
of using a hardcoded absolute path. This commit is needed for
BUILD_WITH_STRICT_TMPPATH builds (currently not on by default).
mav [Thu, 13 Aug 2020 02:32:46 +0000 (02:32 +0000)]
Fill device serial_num and device_id in NVMe XPT.
It allows to report GEOM::lunid for nda(4) same as for nvd(4). Since
NVMe now allows multiple LUs (namespaces) with multiple paths unique
LU identification is important. The serial_num field is filled same
as before with the controller serial number, while device_id is based
on namespace GUID and/or EUI64 fields as recommended by "NVM Express:
SCSI Translation Reference" and matching nvd(4) at the end.
emaste [Thu, 13 Aug 2020 00:19:05 +0000 (00:19 +0000)]
flua: initial support for "require" in the base system
Use /usr not /usr/local for base system components.
Use /usr/lib/flua and /usr/share/flua (not lua) for consistency and to
avoid the possibility that other software accidentally finds our base
system modules.
Also drop the version from the path, as flua represents an unspecified
lua version that corresponds to the FreeBSD version it comes with.
LUA_USE_DLOPEN is not yet enabled because some additional changes are
needed wrt symbol visibility.
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D24605
jhb [Wed, 12 Aug 2020 20:33:29 +0000 (20:33 +0000)]
Check that the frame pointer is within the current stack.
This same check is used on other architectures. Previously this would
permit a stack frame to unwind into any arbitrary kernel address
(including unmapped addresses).
arichardson [Wed, 12 Aug 2020 17:27:24 +0000 (17:27 +0000)]
Use env pwd instead of pwd in crunchgen.c
In r364166 I changed /bin/pwd to pwd, but pwd can be shell builtin that
may not correctly return a real path. To ensure that all symlinks are
resolved use `env pwd -P` instead (the -P flag is part of POSIX so
should be supported everywhere).
markj [Wed, 12 Aug 2020 16:08:44 +0000 (16:08 +0000)]
linprocfs: Fix some inaccuracies in meminfo.
- Fill out MemFree correctly. Delete an ancient comment suggesting that
we don't want to advertise the true quantity of free memory.
- Populate the Buffers field by reading vfs.bufspace.
- The page cache consists of all pages in page queues, not just the
inactive queue.
PR: 248463
Reported and tested by: danfe
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
arichardson [Wed, 12 Aug 2020 15:49:10 +0000 (15:49 +0000)]
Fix stand/newvers.sh with zsh in sh mode
When building on macOS with sh==zsh, newvers.sh was producing an
unterminated string literal due to \\n being turned as a newline. Fix this
by using a here document instead.
arichardson [Wed, 12 Aug 2020 15:49:06 +0000 (15:49 +0000)]
Fix crunchgen usage of mkstemp()
On Glibc systems mkstemp can only be used once with the same template
string since it will be modified in-place and no longer contain any 'X' chars.
It is fine to reuse the same file here but we need to be explicit and use
open() instead of mkstemp() on the second use.
While touching this file also avoid a hardcoded /bin/pwd since that may not
work when building on non-FreeBSD systems.
vmaffione [Wed, 12 Aug 2020 14:45:31 +0000 (14:45 +0000)]
iflib: netmap: improve rxsync to support IFLIB_HAS_RXCQ
For drivers with IFLIB_HAS_RXCQ set, there is a separate completion
queue. In this case, the netmap rxsync routine needs to update
rxq->ifr_cq_cidx in the same way it is updated by iflib_rxeof().
This improves the situation for vmx(4) and bnxt(4) drivers, which
use iflib and have the IFLIB_HAS_RXCQ bit set.
vmaffione [Wed, 12 Aug 2020 14:17:38 +0000 (14:17 +0000)]
iflib: refactor netmap_fl_refill and fix off-by-one issue
First, fix the initialization of the fl->ifl_rxd_idxs array,
which was affected by an off-by-one bug.
Once there, refactor the function to use better names for
local variables, optimize the variable assignments, and
merge the bus_dmamap_sync() inner loop with the outer one.
avg [Wed, 12 Aug 2020 09:56:21 +0000 (09:56 +0000)]
aw_cir: lower activation threshold to support NECx protocol
In NECx the leading mark has length of 8T as opposed to 16T in NEC,
where T is 562.5 us. So, 4.5 ms.
Our threshold was set to 128 * 42.7 us (derived from the sampling
frequency of 3/128 MHz). So, ~5.5 ms.
The new threshold is set to AW_IR_L1_MIN. I think that's a good enough
lower bound for detecting the leading pulse.
Also, calculations of active_delay (which is activation delay) are fixed.
Previously they would be wrong if AW_IR_ACTIVE_T was anything but zero,
because the value was already bit-shifted.
Finally, I am not sure why the activation delay was divided by two when
calculating the initial pulse length. I have not found anything that
would explain or justify it. So, I removed that division.
avg [Wed, 12 Aug 2020 09:07:07 +0000 (09:07 +0000)]
cp2112: a number of cleanups and improvements
- hoist all request / response structures from function level to top level
- replace magic numeric literals with constants
- regroup types, data and functions
- remove setting of the id field in responses as they are completely
overwritten with data from the device
- centralize setting of the id field as it is always set to the value of
request type
- fix setting and querying of open-drain vs push-pull configuration of
an output pin -- it's always in one of those configurations
- detect special pin configurations: a pin in a special configuration is
neither general purpose input or output
- there is still no support for setting special configurations
rmacklem [Wed, 12 Aug 2020 04:35:49 +0000 (04:35 +0000)]
Fix a bug introduced by r363001 for the ext_pgs case.
r363001 added support for ext_pgs mbufs to nfsm_uiombuf().
By inspection, I noticed that "mlen" was not set non-zero and, as such, there
would be an iteration of the loop that did nothing.
This patch sets it.
This bug would have no effect on the system, since the ext_pgs mbuf code
is not yet enabled.
cy [Tue, 11 Aug 2020 23:36:38 +0000 (23:36 +0000)]
When booting a system with WITHOUT_IPFILTER the following errors
are encountered at boot time:
rcorder: requirement `ipfs' in file `/etc/rc.d/netif' has no providers.
rcorder: requirement `ipfilter' in file `/etc/rc.d/netif' has no
providers.
rcorder: requirement `ipfilter' in file `/etc/rc.d/netwait' has no
providers.
rcorder: requirement `ipfilter' in file `/etc/rc.d/net_watchdog' has no
providers.
rcorder: requirement `ipfilter' in file `/etc/rc.d/securelevel' has no
providers.
Listing its own requrements in BEFORE rather than use REQUIRE of
non-optional scripts resolves this issue.
The issue was discovered and patched by glebius at Netflix.
cem [Tue, 11 Aug 2020 20:37:45 +0000 (20:37 +0000)]
Add support for multithreading the inactive queue pageout within a domain.
In very high throughput workloads, the inactive scan can become overwhelmed
as you have many cores producing pages and a single core freeing. Since
Mark's introduction of batched pagequeue operations, we can now run multiple
inactive threads working on independent batches.
To avoid confusing the pid and other control algorithms, I (Jeff) do this in
a mpi-like fan out and collect model that is driven from the primary page
daemon. It decides whether the shortfall can be overcome with a single
thread and if not dispatches multiple threads and waits for their results.
The heuristic is based on timing the pageout activity and averaging a
pages-per-second variable which is exponentially decayed. This is visible in
sysctl and may be interesting for other purposes.
I (Jeff) have verified that this does indeed double our paging throughput
when used with two threads. With four we tend to run into other contention
problems. For now I would like to commit this infrastructure with only a
single thread enabled.
The number of worker threads per domain can be controlled with the
'vm.pageout_threads_per_domain' tunable.
arichardson [Tue, 11 Aug 2020 16:46:48 +0000 (16:46 +0000)]
Fix -DBUILD_WITH_STRICT_TMPPATH dtrace builds
Some of the scripts used for libdtrace invoke nawk instead of awk
(for example cddl/contrib/opensolaris/lib/libdtrace/common/mknames.sh).
When bootstrapping all tools, we get the nawk -> awk link while building
usr.bin/awk, but when linking/copying the dependencies from the host we
were only adding awk but not nawk.
This was silently generating invalid files when building libdtrace with
BUILD_WITH_STRICT_TMPPATH=1 since those scripts invoke nawk instead of
awk. In addition to adding the missing link this commit also adds
set -e to those scripts to catch errors like this in the future.
arichardson [Tue, 11 Aug 2020 16:46:43 +0000 (16:46 +0000)]
Add CLANG/LLD/LLD to BROKEN_OPTIONS when building on non-FreeBSD
These tools require a bootstrap llvm-tblgen/clang-tblgen and that cannot
be built with the current make infrastructure: the config header is not
correct for Linux/macOS and we don't include the CMakeLists.txt in contrib
so we can't generate one that would be correct.
Reviewed By: emaste, imp, dim
Differential Revision: https://reviews.freebsd.org/D14245
arichardson [Tue, 11 Aug 2020 16:46:27 +0000 (16:46 +0000)]
Allow overriding the tool used for stripping binaries
Since the make variable STRIP is already used for other purposes, this
uses STRIPBIN (which is also used for the same purpose by install(1).
This allows using LLVM objcopy to strip binaries instead of the in-tree
elftoolchain objcopy. We make use of this in CheriBSD since passing
binaries generated by our toolchain to elftoolchain strip sometimes results
in assertion failures.
This allows working around https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248516
by specifying STRIPBIN=/path/to/llvm-strip
markj [Tue, 11 Aug 2020 14:19:05 +0000 (14:19 +0000)]
script: Minor cleanups.
- Instead of using isatty() to decide whether to call tcgetattr(), just
call tcgetattr() directly, since that's all that isatty() does anyway.
- Simplify error handling in termset(). Check for errno != ENOTTY from
tcgetattr() to handle errors that may be raised while running
script(1) under a debugger.
hselasky [Tue, 11 Aug 2020 12:17:46 +0000 (12:17 +0000)]
Need to clone the task struct fields related to RCU aswell in the
LinuxKPI after r359727. This fixes a minor regression issue. Else the
priority tracking won't work properly when both sleepable and
non-sleepable RCU is in use on the same thread.
Bump the __FreeBSD_version to force recompilation of external kernel
modules.
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