The IVAR_MAX_DATA is supposed to have the number of descriptor X the mmc
block size and desc_count contain all this information + 1.
Reported by: phk
MFC after: 1 week
Remove the list of architectures and depend on COMPAT_FREEBSD32 which is
defined (if relevent) in opt_global.h and thus defined everywhere in
the kernel.
This is a minor change in behavior in that 32-bit compat for sysctls now
depends on COMPAT_FREEBSD32 rather than on the potential for 32-bit
compat support. The prior arrangement may have been part of an attempt
to allow 32-bit compat to be loadable, but such attempts are doomed to
failure (due to the fact that ioctls have no meaning without the
associated file descriptor) without vastly more refactoring and some
sort of COMPAT_FREEBSD32_SUPPORT option.
Reviewed by: jhb
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D23748
This is the result of splitting r358153 in two, in order to avoid a build
system bug and being able to merge the change to previous releases..
Document better this file, updating the URL to the IANA registry and closely
match the official services.
For system ports (0 to 1023) we now try to follow the registry closely, noting
some historical differences where applicable.
As a side effect: drop references to unofficial Kerberos IV which was EOL'ed
on Oct 2006[1]. While it is conceivable some people may still use it in some
very old FreeBSD machines that can't be replaced easily, the use of it is
considered a security risk. Also drop the unofficial netatalk, which we
supported long ago in the kernel but was dropped long ago.
Leave for now smtps, even though it conflicts with IANA's submissions.
The change should have very little visibility, if any, but should be a
step closer to the current IANA database.
[1] https://web.mit.edu/kerberos/krb4-end-of-life.html
MFC after: 2 weeks
Following previous revision, apply the same minor optimization to
hand-rolled atomic_fcmpset_128 in pmap.c.
Reviewed by: kib, markj
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D23870
Previously the pattern to extract status flags from inline assembly
blocks was to use setcc in the block to write the flag to a register.
This was suboptimal in a few ways:
- It would lead to code like: sete %cl; test %cl; jne, i.e. a flag
would just be loaded into a register and then reloaded to a flag.
- The setcc would force the block to use an additional register.
- If the client code didn't care for the flag value then the setcc
would be entirely pointless but could not be eliminated by the
optimizer.
A more modern inline asm construct (since gcc 6 and clang 9) allows for
"flag output operands", where a C variable can be written directly from
a flag. The optimizer can then use this to produce direct code where
the flag does not take a trip through a register.
In practice this makes each affected operation sequence shorter by five
bytes of instructions. It's unlikely this has a measurable performance
impact.
Reviewed by: kib, markj, mjg
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D23869
This was the intent of the existing code, but instead it would
unconditionally load dtraceall.ko because of a stale errno value.
Reported by: pho
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
refcount(9) was recently extended to support waiting on a refcount to
drop to zero, as this was needed for a lockless VM object
paging-in-progress counter. However, this adds overhead to all uses of
refcount(9) and doesn't really match traditional refcounting semantics:
once a counter has dropped to zero, the protected object may be freed at
any point and it is not safe to dereference the counter.
This change removes that extension and instead adds a new set of KPIs,
blockcount_*, for use by VM object PIP and busy.
Reviewed by: jeff, kib, mjg
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D23723
In certain cases (probably not during normal operation but observed in
the lab during development) ip6_ouput() could return without error
and ifpp (&oifp) not updated.
Given oifp was never initialized we would take the later branch
as oifp was not NULL, and when calling icmp6_ifstat_inc() we would
panic dereferencing a garbage pointer.
For code stability initialize oifp to NULL before first use to always
have a deterministic value and not rely on a called function to behave
and always and for ever do the work for us as we hope for.
MFC after: 3 days
Sponsored by: Netflix
This more clearly differentiates TLS records encrypted and decrypted
in TOE connections from those encrypted via NIC TLS.
MFC after: 1 week
Sponsored by: Chelsio Communications
It is specifically mentioned in the manual page. Note it has no functional
change in reality because DH_set0_pqg() cannot fail when both p and g are
not NULL.
[RISCV] Lower llvm.trap and llvm.debugtrap
Summary:
Until this commit, these have lowered to a call to abort().
`llvm.trap()` now lowers to `unimp`, which should trap on all systems.
`llvm.debugtrap()` now lowers to `ebreak`, which is exactly what this
instruction is for.
Reviewers: asb, luismarques
Reviewed By: asb
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D69390
This fixes miscompilation resulting in linking failures with
INVARIANTS disabled.
Reviewed by: dim
Differential Revision: https://reviews.freebsd.org/D23857
Fix the following -Werror warning from clang 10.0.0:
sys/arm/arm/identcpu-v6.c:227:5: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation]
if (val & CPUV7_CT_CTYPE_RA)
^
sys/arm/arm/identcpu-v6.c:225:4: note: previous statement is here
if (val & CPUV7_CT_CTYPE_WB)
^
This was due to an accidentally inserted tab before the if statement.
MFC after: 3 days
sys/arm/arm/identcpu-v6.c:227:5: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation]
if (val & CPUV7_CT_CTYPE_RA)
^
sys/arm/arm/identcpu-v6.c:225:4: note: previous statement is here
if (val & CPUV7_CT_CTYPE_WB)
^
This was due to an accidentally inserted tab before the if statement.
MFC after: 3 days
ftp(1) from vendor/tnftp always tried the following for
every TCP connection:
1. Get the current buffer length of SO_SNDBUF and SO_RCVBUF
by getsockopt(2).
2. Invoke setsockopt(2) to set them to the same values
after checking if they are in a range between 8 KiB to 8 MiB.
This behavior broke dynamic buffer sizing enabled by
default (net.inet.tcp.{recv,send}buf_auto sysctls) and
led to a very poor transfer rate. The fetch(1) utility
does not have this problem.
This change prevents SO_SNDBUF and SO_RCVBUF from configuring
when the buffer auto-sizing is enabled unless the buffer sizes are
explicitly specified.
PR: 240827
Spotted by: Yuichiro NAITO
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D23732
OpenSSL 1.1 API patch for sendmail had a bug which
prevented sm_RSA_generate_key() function from working.
This function is used to generate a temporary RSA key
for a shared memory region used for TLS processing.
Note that 12.0 and 12.1-RELEASE include this bug.
This affects only if SM_CONF_SHM compile-time
option (enabled by default) and SharedMemoryKey
run-time option (not enabled by default) in a .cf file are
specified. The latter corresponds to confSHARED_MEMORY_KEY in
a .mc file.
PR: 242861
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D23734
This provides the potential to force a lazy (tick based) SMR to advance
when there are blocking waiters by decoupling the wr_seq value from the
ticks value.
Add some missing compiler barriers.
Reviewed by: rlibby
Differential Revision: https://reviews.freebsd.org/D23825
[MC][ARM] Resolve some pcrel fixups at assembly time (PR44929)
MC currently does not emit these relocation types, and lld does not
handle them. Add FKF_Constant as a work-around of some ARM code after
D72197. Eventually we probably should implement these relocation
types.
By Fangrui Song!
Differential revision: https://reviews.llvm.org/D72892
This re-enables using the arm 'adr' pseudo instruction on global symbols
again. It was broken as a side-effect of upstream commit 2bfee35cb,
which lead to "error: unsupported relocation on symbol" when assembling
such constructs, which are used in e.g. sys/arm/arm/locore-v[46].S.
PR: 244251
read() can return a short read, whereas stream_read() waits until the
full version string is read.
Submitted by: Ka Ho Ng <khng300_gmail.com>
Reviewed by: grehan
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D23591
Use __riscv_flen instead of __riscv_float_abi_soft. While the latter works for
userland (and one could argue it's more correct), it fails for the kernel. We
compile the kernel with -mabi=lp64 (eg soft float abi) to avoid floating point
instructions in the kernel. We also compile the kernel -march=rv64imafdc for
hard float kernels (eg those with options FPE), but with -march=rv64imac for
softfloat kernels (eg those with FPE). Since we do this, in the kernel (as in
userland) __riscv_flen will be defined for 'riscv64' and not for 'riscv64sf'.
This also removes the -DMACHINE_ARCH hack now that it's no longer needed.
Longer term, we should return the ABI from the sysctl hw.machine_arch like on
amd64 for i386 binaries.
Suggested by: mhorne@
Differential Revision: https://reviews.freebsd.org/D23813
