initializations.
Relax some overly perscriptive rules against declarations: they may be at the
start of any blocks, even if things aren't super complicated. Allow more
initializations (those that call simple functions, like accessor functions for
newbus are fine). Allow the common idiom of declaring the loop variable in a for
loop.
This tries to codify what common exceptions are today, as well as give
some guidance on when it's best to do these things.
Reviewed by: tsoome, kp, markm, allanjude, jiles, cem, rpokala
(earlier versions: seanc, melifaro, bapt, pjd, bz, pstef, arichards,
jhibits, vangyzen, jmallet, ian, glebius, jhb, dab, adrian,
sef, gnn)
Differential Revision: https://reviews.freebsd.org/D25312
The code would unconditionally lock the vnode to audit or call the
mac hoook, even if neither want to do anything. Pre-check the state
to avoid locking in the common case of nothing to do.
Note this code should not be normally executed anyway as vnodes are
always return ready. However, poll1/2 from will-it-scale use regular
files for benchmarking, presumably to focus on the interface itself
as the vnode handler is not supposed to do almost anything.
This in particular fixes poll2 which passes 128 fds.
$ ./poll2_processes -s 10
before: 134411
after: 271572
Those rules have been broken at least since 8-STABLE, when the port
providing the ezdownload binary was removed (misc/ezload).
Reviewed by: kevans, imp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D25686
if_attach() -> if_attach_internal() will call if_attachdomain1(ifp) any time
an ethernet interface is setup *after*
SI_SUB_PROTO_IFATTACHDOMAIN/SI_ORDER_FIRST. This eventually leads to
nd6_ifattach() -> nd6_setmtu0() stashing off ifp->if_mtu in ndi->maxmtu
*before* ifp->if_mtu has been properly set in some scenarios, e.g., USB
ethernet adapter plugged in later on.
For interfaces that are created in early boot, we don't have this issue as
domains aren't constructed enough for them to attach and thus it gets
deferred to domainifattach at SI_SUB_PROTO_IFATTACHDOMAIN/SI_ORDER_SECOND
*after* the mtu has been set earlier in ether_ifattach().
PR: 248005
Submitted by: Mathew <mjanelle blackberry com>
MFC after: 1 week
This shortens fdalloc by over 60 bytes. Correctness verified by running both
variants at the same time and comparing the result of each call.
Note someone(tm) should make a pass at converting everything else feasible.
The AR9341 AHB runs at 225MHz, much faster than the 33MHz of the
AR71xx AHB. So not only is the math going to do weird things, it
will also wrap rather than being clamped.
So:
* clamp! don't wrap!
* tidy up some debugging
* add an option to throw an NMI rather than reset!
Tested:
* AR9341 SoC (TP-Link TL-WDR4300), patting/not patting the watchdog!
This change was made upstream between 7.9p1 and 8.0p1. We've made local
changes in the same places for handling the version_addendum; apply the
SSLeay_version to OpenSSL_version change in advance of importing 8.0p1.
This should have been part of r363225.
Obtained from: OpenSSH-portable a65784c9f9c5
MFC with: r363225
Sponsored by: The FreeBSD Foundation
GLibc expects six 'X' characters in the mkstemp template argument and
will return EINVAL otherwise.
Reviewed By: emaste, imp, mjg
Differential Revision: https://reviews.freebsd.org/D25662
This is neither POSIX compliant nor what the implementation does.
This could be allowed by changing the value of TCSAFLUSH from 2 to 3,
but that doesn't seem worthwhile after 25+ years.
Reviewed by: imp
MFC after: 1 week
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D25659
This change was made upstream between 7.9p1 and 8.0p1. We've made local
changes in the same places for handling the version_addendum; apply the
SSLeay_version to OpenSSL_version change in advance of importing 8.0p1.
Obtained from: OpenSSH-portable a65784c9f9c5
Sponsored by: The FreeBSD Foundation
Since r304321 (-current: Aug 18, 2016) and r328866 (stable/11: Feb 5, 2018)
the FreeBSD loader has supported reading from datasets with the
large_blocks feature active.
PR: 247992
Reported by: Anton Saietskii <vsasjason@gmail.com>
MFC after: 2 weeks
Sponsored by: Klara Inc.
Note: date not bumped because "content" was not changed, just inserted some
missing words.
PR: 248001
Submitted by: Jose Luis Duran <jlduran@gmail.com>
MFC after: 2 weeks
Sponsored by: Klara Inc.
Use PVO_PADDR macro to get the physical address from a PVO, instead of
explicitly ANDing pvo_pte.pa with LPTE_RPGN where it is needed. Besides
improving readability, this is needed to support superpages (D25237), where
the steps to get the PA from a PVO are different.
Reviewed by: markj
Sponsored by: Eldorado Research Institute (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D25654
read_ibdiag_config NULL deref
read_ibdiag_config mem leak
ib_mad_inv_field_str Missing comma in a string array initialization
print_node_header NULL deref
diff_node_ports copy-paste error
ibportstate.c main() missing break in switch
set_thresholds NULL ptr deref
dump_unicast_tables leaks mapnd
umad_cm_attr_str dead code
__ibv_close_device close(-1)
check return value of listen()
mlx5 bitmap.h - bad bit shift - UB
get_dst_addr check return value of inet_pton
osm_perfmgr_init check return value of cl_spinlock_init
osm_port_new memory leak on error path
sa_mad_ctrl_rcv_callback missing break in switch case
I did not include CID numbers because these were found by an internal
run at Isilon.
Reviewed by: cem kib
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D25676
The current localedef simply assumes that the locale headers on build system
are compatible with those on the target system which is not necessarily true.
It generally works on FreeBSD (as long as we don't change the locale headers),
but Linux and macOS provide completely different locale headers.
This change adds new bootstrap headers that namespace certain xlocale
structures defined or used by in the headers that localdef needs.
This is required since system headers *must* be able to include the "real"
locale headers for printf(), etc., but we also want to access the target
systems's internal locale structures.
Reviewed By: yuripv, brooks
Differential Revision: https://reviews.freebsd.org/D25229
I hit those error messages when using a localedef built against headers
that don't match the target system (cross-building from a Linux host).
This problem will be fixed in the next commit.
Generate libpmc_events.c in a temporary file first and only overwrite it
if the files are actually different.
This avoids compiling and relinking the different variants of libpmc on
every incremental build.
Reviewed By: jhb
Differential Revision: https://reviews.freebsd.org/D24784
It keeps recalculated way more often than it is needed.
Provide a routine (fdlastfile) to get it if necessary.
Consumers may be better off with a bitmap iterator instead.
The code in nfscl_dofflayout() loops when a flexible file layout server
provides a small write data limit (no extant server is known to do this).
If/when it looped, it erroneously reused the "drpc" argument for the
mirror worker thread, corrupting it.
This patch fixes the problem by only using the calling thread after the
first loop iteration.
Found during testing by simulating a server with a small write size.
Since no extant pNFS server is known to provide a small write size,
this fix it not needed in practice at this time.
MFC after: 2 weeks
Unset VIS_SAFE flag as it turned out to be actually unsafe
for continuos top display as it's passing through sequences
resulting cursor movement (backspace, tab, carriage-return),
and explicitly set VIS_TAB for the same reason.
Reported by: Mark Millard <marklmi@yahoo.com>, swills
Tested by: Mark Millard <marklmi@yahoo.com>, swills
pmc_cpuid was uninitialized for most AMD processor families. We can still
populate this string for unimplemented families.
Also added a CPUID_TO_STEPPING macro and converted existing code to use it.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D25673
That follows Linux and fixes related drm-kmod-5.3 panic.
Reviewed by: imp, hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25657
Previously it would check 4, 3, 2, 1 lists. In practice by the time
it is getting called all lists have some elements and consequently
this does not result in new evictions.
Nonetheless, the code is clearer.
Tested by: pho
I made an attempt to fix this in r362978, but all it really did was
confine the issue to the $MACHINE_CPUARCH == "riscv" case. The real
problem is that LINKER_FEATURES is not defined here, so bsd.linker.mk
needs to be included.
This error with cleandir only occurs when META_MODE is disabled, which
explains why it was missed by both CI and myself.
Note that this effectively reverts r362978.
Reported by: mjg
Reviewed by: imp, kevans (in IRC)
.. and stuff if into the unused target vnode field
This gets rid of concurrent nc_flag modifications racing with the
shrinker and consequently fixes a bug where such a change could have
been missed when cache_ncp_invalidate was being issued..
Reported by: zeising
Tested by: pho, zeising
Fixes: r362828 ("cache: lockless forward lookup with smr")
Stop using smp_ipi_mtx to protect global shootdown state, and
move/multiply the global state into pcpu. Now each CPU can initiate
shootdown IPI independently from other CPUs. Initiator enters
critical section, then fills its local PCPU shootdown info
(pc_smp_tlb_XXX), then clears scoreboard generation at location (cpu,
my_cpuid) for each target cpu. After that IPI is sent to all targets
which scan for zeroed scoreboard generation words. Upon finding such
word the shootdown data is read from corresponding cpu' pcpu, and
generation is set. Meantime initiator loops waiting for all zeroed
generations in scoreboard to update.
Initiator does not disable interrupts, which should allow
non-invalidation IPIs from deadlocking, it only needs to disable
preemption to pin itself to the instance of the pcpu smp_tlb data.
The generation is set before the actual invalidation is performed in
handler. It is safe because target CPU cannot return to userspace
before handler finishes. In principle only NMI can preempt the
handler, but NMI would see the kernel handler frame and not touch
not-invalidated user page table.
Handlers loop until they do not see zeroed scoreboard generations.
This, together with hardware keeping one pending IPI in LAPIC IRR
should prevent lost shootdowns.
Notes.
1. The code does protect writes to LAPIC ICR with exclusion. I believe
this is fine because we in fact do not send IPIs from interrupt
handlers. More for !x2APIC mode where ICR access for write requires
two registers write, we disable interrupts around it. If considered
incorrect, I can add per-cpu spinlock around ipi_send().
2. Scoreboard lines owned by given target CPU can be padded to the
cache line, to reduce ping-pong.
Reviewed by: markj (previous version)
Discussed with: alc
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
Differential revision: https://reviews.freebsd.org/D25510
In case of errors, the cleanup was not consistent.
Thanks to Felix Weinrank for fuzzing the userland stack and making
me aware of the issue.
MFC after: 1 week
realtime priorities
The current `ps -axO rtprio' show threads running at interrupt
priority such as the [intr] thread as '1:48' and threads running
at kernel priority such as [pagedaemon] as normal:4294967260.
This change shows [intr] as intr:48 and [pagedaemon] as kernel:4.
Reviewed by: kib
MFC after: 1 week (together with -r362369)
Differential Revision: https://reviews.freebsd.org/D25660
It can be useful to get a dump of all registers when investigating why we
received an exception that we are unable to handle. In these cases we
already call panic, however we don't always print the registers.
Add calls to print_registers and print esr and far when applicable.
Sponsored by: Innovate UK
