According to comments in the Makefile, to make pxeboot work we need to
have crt0.o first. This is needed because the simplified loader in
pxeboot assumes that the startup code is at offset 0 in this binary. In
normal booting, the start address can be obtained from headers of the
binary, but since pxeboot encodes this as a pure binary, it has no way
of knowing where that is and assumes 0. Added comments to that effect
in the Makefile.
We've done this by adding it to OBJS before all the other .o's are
added. However, there's a problem. This also adds it to the CLEANFILES
variable, which causes it to be removed from multiple places. The
dependencies may also cause it to be re-built at a time that's after
boot2 is built. This causes installs to fail because at install time
boot2 is considered to be out of date and the programs to rebuild it are
no longer in the path.
Cope with this problem by just adding it to LDFLAGS instead.
Glanced at by: kevans ("I thought that went in ages ago")
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D28876
Attaching and detaching devices can be heavy-weight and detaching can
sleep waiting for events. For that reason using the system-wide
single-threaded taskqueue_thread is not really appropriate.
There is even a possibility for a deadlock if taskqueue_thread is used
for detaching.
In fact, there is an easy to reproduce deadlock involving nvme, pass
and a sudden removal of an NVMe device.
A pass peripheral would not release a reference on an nvme sim until
pass_shutdown_kqueue() is executed via taskqueue_thread. But the
taskqueue's thread is blocked in nvme_detach() -> ... -> cam_sim_free()
because of the outstanding reference.
MFC after: 10 days
Sponsored by: CyberSecure
Reviewed by: mav, imp
Differential Revision: https://reviews.freebsd.org/D30144
zfsd uses a device's physical path attribute to automatically replace a
missing ZFS disk when a blank disk is inserted into the same physical
slot. Currently gmultipath passes through its underlying providers'
physical path attribute. That may cause zfsd to replace a missing
gmultipath provider with a newly arrived, single-path disk. That would
be bad.
This commit fixes that problem by simply appending "/mp" to the
underlying providers' physical path, in a manner similar to what geli
already does.
Sponsored by: Axcient
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D29941
This fixes several breakages (panics) since the tcp_lro code was
committed that have been reported. Quite a few new features are
now in rack (prefecting of DGP -- Dynamic Goodput Pacing among the
largest). There is also support for ack-war prevention. Documents
comming soon on rack..
Sponsored by: Netflix
Reviewed by: rscheff, mtuexen
Differential Revision: https://reviews.freebsd.org/D30036
Summary:
Some methods are split between DMAP and non-DMAP, conditional on
hw_direct_map variable. Rather than checking this variable every time,
use it to install different functions via IFUNCs.
Reviewed By: luporl
Differential Revision: https://reviews.freebsd.org/D30071
Summary:
Fix FPU exception management for powerpcspe. Bits are in a different place from
the standard FPSCR, so we need to handle the shifting differences. Also,
there's no concept of a "software exception" raise, so we need to do exceptional
math to trigger the exception from software.
Reviewed By: alfredo
Differential Revision: https://reviews.freebsd.org/D22824
set kld_disbale=y or any value in the boot loader and that will
disable loading of the kld_list.
Differential Revision: https://reviews.freebsd.org/D26939
Do not assume that the kernel boot time is invariant. It is not. FreeBSD
uses the formula:
wall_time = boot_time + uptime
where uptime is monotinically increasing and boot_time is adjusted to
get the proper time of day. FreeBSD offers a way to retrieve the uptime
directly, so use that instead of trying to compute it by subtracting
boot_time from wall_time.
Sponsored by: Netflix
Reviewed by: cy@
Differential Revision: https://reviews.freebsd.org/D30114
When verifying, byte-by-byte, that the user-supplied counters are
zero-filled, sysctl_igmp_stat() would check for zero before checking the
loop bound. Perform the checks in the correct order.
Reported by: KASAN
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
When copying from the old buffer to the new buffer, we don't know the
requested size of the old allocation, but only the size of the
allocation provided by UMA. This value is "alloc". Because the copy
may access bytes in the old allocation's red zone, we must mark the full
allocation valid in the shadow map. Do so using the correct size.
Reported by: kp
Tested by: kp
Sponsored by: The FreeBSD Foundation
Now that all repositories have switched to git, initiate the de-orbit
burn for svnlite(1).
Reviewed by: emaste
MFC after: 1 month
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D30105
Centralize logic for handling compat ioctls into two blocks of code at
the start and end of the ioctl routine. This avoids the conversion
logic being spread out both in multiple blocks in ifioctl as well as
various helper functions.
Reviewed by: brooks, kib
Obtained from: CheriBSD
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D29891
In FreeBSD, the current time is computed from uptime + boottime. Uptime
is a continuous, smooth function that's monotonically increasing. To
effect changes to the current time, boottime is adjusted. boottime is
mutable and shouldn't be cached against future need. Document the
current implementation, with the caveat that we may stop stepping
boottime on resume in the future and will step uptime instead (noted in
the commit message, but not in the code).
Sponsored by: Netflix
Reviewed by: phk, rpokala
Differential Revision: https://reviews.freebsd.org/D30116
Add description for what each of the parameters are to the cam_sim_alloc
call. Add some additional context for the mtx and queue parameters to
explain what special values passed in mean.
MFC After: 3 days
Reviewed by: mav@
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D30115
DRIVER_OK status is set after device_attach() succeeds. For now postpone
disk_create to attach_completed() method.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Reviewed by: grehan
Approved by: lwhsu (mentor)
Differential Revision: https://reviews.freebsd.org/D30049
This reverts commit a7d593dd1d.
We now use compute_engine_instance which allows us to specify a custom
disk size. Also go back to using the default qemu version (rather than
qemu42 or qemu-devel) as any issues were fixed some time ago.
Reviewed by: lwhsu, markj
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D30082
Remove all the 'entry' and 'return' probes; they clutter up the source
and are redundant to FBT.
Reviewed By: dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30040
DXR maintains compressed lookup structures with a trivial search
procedure. A two-stage trie is indexed by the more significant bits of
the search key (IPv4 address), while the remaining bits are used for
finding the next hop in a sorted array. The tradeoff between memory
footprint and search speed depends on the split between the trie and
the remaining binary search. The default of 20 bits of the key being
used for trie indexing yields good performance (see below) with
footprints of around 2.5 Bytes per prefix with current BGP snapshots.
Rebuilding lookup structures takes some time, which is compensated for by
batching several RIB change requests into a single FIB update, i.e. FIB
synchronization with the RIB may be delayed for a fraction of a second.
RIB to FIB synchronization, next-hop table housekeeping, and lockless
lookup capability is provided by the FIB_ALGO infrastructure.
DXR works well on modern CPUs with several MBytes of caches, especially
in VMs, where is outperforms other currently available IPv4 FIB
algorithms by a large margin.
Synthetic single-thread LPM throughput test method:
kldload test_lookup; kldload dpdk_lpm4; kldload fib_dxr
sysctl net.route.test.run_lps_rnd=N
sysctl net.route.test.run_lps_seq=N
where N is the number of randomly generated keys (IPv4 addresses) which
should be chosen so that each test iteration runs for several seconds.
Each reported score represents the best of three runs, in million
lookups per second (MLPS), for two bechmarks (RND & SEQ) with two FIBs:
host: single interface address, local subnet route + default route
BGP: snapshot from linx.routeviews.org, 887957 prefixes, 496 next hops
Bhyve VM on an Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60 GHz:
inet.algo host, RND host, SEQ BGP, RND BGP, SEQ
bsearch4 40.6 20.2 N/A N/A
radix4 7.8 3.8 1.2 0.6
radix4_lockless 18.0 9.0 1.6 0.8
dpdk_lpm4 14.4 5.0 14.6 5.0
dxr 70.3 34.7 43.0 19.5
Intel(R) Core(TM) i5-5300U CPU @ 2.30 GHz:
inet.algo host, RND host, SEQ BGP, RND BGP, SEQ
bsearch4 47.0 23.1 N/A N/A
radix4 8.5 4.2 1.9 1.0
radix4_lockless 19.2 9.5 2.5 1.2
dpdk_lpm4 31.2 9.4 31.6 9.3
dxr 84.9 41.4 51.7 23.6
Intel(R) Core(TM) i7-4771 CPU @ 3.50 GHz:
inet.algo host, RND host, SEQ BGP, RND BGP, SEQ
bsearch4 59.5 29.4 N/A N/A
radix4 10.8 5.5 2.5 1.3
radix4_lockless 24.7 12.0 3.1 1.6
dpdk_lpm4 29.1 9.0 30.2 9.1
dxr 101.3 49.9 69.8 32.5
AMD Ryzen 7 3700X 8-Core Processor @ 3.60 GHz:
inet.algo host, RND host, SEQ BGP, RND BGP, SEQ
bsearch4 70.8 35.4 N/A N/A
radix4 14.4 7.2 2.8 1.4
radix4_lockless 30.2 15.1 3.7 1.8
dpdk_lpm4 29.9 9.0 30.0 8.9
dxr 163.3 81.5 99.5 44.4
AMD Ryzen 5 5600X 6-Core Processor @ 3.70 GHz:
inet.algo host, RND host, SEQ BGP, RND BGP, SEQ
bsearch4 93.6 46.7 N/A N/A
radix4 18.9 9.3 4.3 2.1
radix4_lockless 37.2 18.6 5.3 2.7
dpdk_lpm4 51.8 15.1 51.6 14.9
dxr 218.2 103.3 114.0 49.0
Reviewed by: melifaro
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29821
Add a LPS benchmark variant which introduces artificial dependencies
between successive lookups. While here, instead of writing the results
from the lookups to a huge array, add them to an accumulator, in a more
lightweight attempt at preventing the CPU's OOO machinery from
discarding the lookup results if they would be completely unused.
net.route.test.run_lps_rnd measures LPS throughput with independent
uniformly random keys
net.route.test.run_lps_seq measures LPS throughput with uniformly
random keys with artificial interdependencies
Reviewed by: melifaro
MFC after: 7 days
Differential Revision: https://reviews.freebsd.org/D30096
Document what __FreeBSD_version means a bit better by documenting the
sorts of events it should be bumped for. Also include a handy shorthand
for what it means. Add a some advice for how frequently to change this
as well.
Added a note about the approved way to parse this from the param.h file,
though that was not in the review. All in-tree users have been updated
to this method prior to this commit. Move and reword the comment that
was on the same line.
Suggestions by: greg@unrelenting, arch@
Reviewed by: rgrimes@ (earlier version).
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D29850
The _ext event notification includes the address being added/removed and
that gives the driver an easy way to ignore non-IPv6 addresses. Remove
'tom' from the handler's name while here, it was moved out of t4_tom a
long time ago.
MFC after: 1 week
Sponsored by: Chelsio Communications
To use it comms/iwmbt-firmware port should be updated to 20210315 version.
Submitted by: Philippe Michaud-Boudreault <pitwuu@gmail.com>
Tested by: Helge Oldach <freebsd@oldach.net>
Reviewed by: wulf
PR: 228787
MFC after: 2 weeks
dim@ is preparing to import Clang/LLVM 12 into the base system as the
system compiler / toolchain. Apply the same change to the Cirrus-CI
config.
Reviewed by: imp, markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D30109
Add a new control message to move ethernet addresses to a given link
in ng_bridge(4). Send this message instead of doing the work directly.
This decouples the read-only activity from the modification under a
more strict writer lock.
Decoupling the work is a prerequisite for multithreaded operation.
Approved by: manpages (bcr), kp (earlier version)
MFC: 3 weeks
Differential Revision: https://reviews.freebsd.org/D28516
Back in the day, we used to have a number of entries that were either
'on' or 'off' directly, rather than conditionally on 'onifexists'
etc. Back then, we tried to line up the 'secure' columns by using the
construct 'on secure' or 'off secure' (one space or two). Now that these
have all moved to a conditional construct, remove the second space on
the ttys that still have it. This reduces diffs between the different
ttys and is no functional change. i386 and amd64 did this a long time
ago, and those are the only ones that affected external users (who used
to sed 's/on /off /' the entires as part of the automation).
MFC After: 3 days
Sponsored by: Netflix
This fixes strace(1) erroneously reporting return values
as "Function not implemented", combined with reporting the binary
ABI as X32.
Very similar code in linux_ptrace_getregs() is left as it is - it's
probably wrong too, but I don't have a way to test it.
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29927
When loading attributes from the cache, the NFS client is careful to
copy only the fields that it initialized. After fetching attributes
from the server, however, it would copy the entire vattr structure
initialized from the RPC response, so uninitialized stack bytes would
end up being copied to userspace. In particular, va_birthtime (v2 and
v3) and va_gen (v3) had this problem.
Use a common subroutine to copy fields provided by the NFS client, and
ensure that we provide a dummy va_gen for the v3 case.
Reviewed by: rmacklem
Reported by: KMSAN
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D30090
Warner Losh
Andriy Gapon
Alan Somers
Gleb Smirnoff
Randall Stewart
Andrew Turner
Edward Tomasz Napierala
Justin Hibbits
Michael Tuexen
Mark Johnston
John Baldwin
Ka Ho Ng
Ed Maste
Marko Zec
Navdeep Parhar
Philippe Michaud-Boudreault
Lutz Donnerhacke
Baptiste Daroussin
Peter Holm
Rick Macklem
Dimitry Andric