Factor out lltable locking logic from lltable_try_set_entry_addr()
into a separate lltable_acquire_wlock(), so the latter can be used
in other parts of the code w/o duplication.
Create nd6_try_set_entry_addr() to avoid code duplication in nd6.c
and nd6_nbr.c.
Move lle creation logic from nd6_resolve_slow() into a separate
nd6_get_llentry() to simplify the former.
These changes serve as a pre-requisite for implementing
RFC8950 (IPv4 prefixes with IPv6 nexthops).
Differential Revision: https://reviews.freebsd.org/D31432
MFC after: 2 weeks
Use newly-create llentry_request_feedback(),
llentry_mark_used() and llentry_get_hittime() to
request datapatch usage check and fetch the results
in the same fashion both in IPv4 and IPv6.
While here, simplify llentry_provide_feedback() wrapper
by eliminating 1 condition check.
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D31390
When certain multipath route begins flapping really fast, it may
result in creating multiple identical nexthop groups. The code
responsible for unlinking unused nexthop groups had an implicit
assumption that there could be only one nexthop group for the
same combination of nexthops with weights. This assumption resulted
in always unlinking the first "identical" group, instead of the
desired one. Such action, in turn, produced a used-but-unlinked
nhg along with freed-and-linked nhg, ending up in random crashes.
Similarly, it is possible that multiple identical nexthops gets
created in the case of high route churn, resulting in the same
problem when deleting one of such nexthops.
Fix by matching the nexthop/nexhop group pointer when deleting the item.
Reported by: avg
MFC after: 1 week
While nvlists are very useful in maximising flexibility for future
extensions their performance is simply unacceptably bad for the
getstates feature, where we can easily want to export a million states
or more.
The DIOCGETSTATESNV call has been MFCd, but has not hit a release on any
branch, so we can still remove it everywhere.
Reviewed by: mjg
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31099
debugnet_handle_arp:
An assertion is present to ensure the pcb is only modified when the state is
DN_STATE_INIT. Because debugnet_arp_gw() is asynchronous it is possible for
ARP replies to come in after the gateway address is known and the state
already changed.
debugnet_handle_ip:
Similarly it is possible for packets to come in, from the expected
server, during the gateway mac discovery phase. This can happen from
testing disconnects / reconnects in quick succession. This later
causes some acks to be sent back but hit an assertion because the
state is wrong.
Reviewed by: cem, debugnet_handle_arp: markj, vangyzen
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D31327
if_bridge member interfaces should always have the same MTU as the
bridge itself, so disallow MTU changes on interfaces that are part of an
if_bridge.
Reviewed by: donner
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31304
if_bridge used to only allow MTU changes if the new MTU matched that of
all member interfaces. This doesn't really make much sense, in that we
really shouldn't be allowed to change the MTU of bridge member in the
first place.
Instead we now change the MTU of all member interfaces. If one fails we
revert all interfaces back to the original MTU.
We do not address the issue where bridge member interface MTUs can be
changed here.
Reviewed by: donner
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31288
SO_RERROR indicates that receive buffer overflows should be handled as
errors. Historically receive buffer overflows have been ignored and
programs could not tell if they missed messages or messages had been
truncated because of overflows. Since programs historically do not
expect to get receive overflow errors, this behavior is not the
default.
This is really really important for programs that use route(4) to keep
in sync with the system. If we loose a message then we need to reload
the full system state, otherwise the behaviour from that point is
undefined and can lead to chasing bogus bug reports.
Reviewed by: philip (network), kbowling (transport), gbe (manpages)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D26652
These two fuctions were identical, so move them into the common
vlan_set_pcp() function, exposed in the if_vlan_var.h header.
Reviewed by: donner
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31275
This allows the use of VLAN PCP in dhclient, which is required for
certain ISPs (such as Orange.fr).
Reviewed by: bcr (man page)
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31263
Numerous counters got migrated from straight uint64_t to the counter(9)
API. Unfortunately the implementation comes with a significiant
performance hit on some platforms and cannot be easily fixed.
Work around the problem by implementing a pf-specific variant.
Reviewed by: kp
Sponsored by: Rubicon Communications, LLC ("Netgate")
This shaves calculation which in particular helps on arm.
Note using the & hack instead would still be more work.
Reviewed by: kp
Sponsored by: Rubicon Communications, LLC ("Netgate")
Kernel side implementation to allow switching between on and off modes,
and allow this configuration to be retrieved.
MFC after: 1 week
Sponsored by: Modirum MDPay
Differential Revision: https://reviews.freebsd.org/D31139
Import OpenBSD's syncookie support for pf. This feature help pf resist
TCP SYN floods by only creating states once the remote host completes
the TCP handshake rather than when the initial SYN packet is received.
This is accomplished by using the initial sequence numbers to encode a
cookie (hence the name) in the SYN+ACK response and verifying this on
receipt of the client ACK.
Reviewed by: kbowling
Obtained from: OpenBSD
MFC after: 1 week
Sponsored by: Modirum MDPay
Differential Revision: https://reviews.freebsd.org/D31138
Support the 'match' keyword.
Note that support is limited to adding queuing information, so without
ALTQ support in the kernel setting match rules is pointless.
For the avoidance of doubt: this is NOT full support for the match
keyword as found in OpenBSD's pf. That could potentially be built on top
of this, but this commit is NOT that.
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31115
Add a new version of the DIOCGETSTATES call, which extends the struct to
include the original interface information.
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31097
Indicate that this is a kernel-only structure, and make it easier to
distinguish from others used to communicate with userspace.
Reviewed by: mjg
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31096
Instead serialize against these operations with a dedicated lock.
Prior to the change, When pushing 17 mln pps of traffic, calling
DIOCRGETTSTATS in a loop would restrict throughput to about 7 mln. With
the change there is no slowdown.
Reviewed by: kp (previous version)
Sponsored by: Rubicon Communications, LLC ("Netgate")
Creating tables and zeroing their counters induces excessive IPIs (14
per table), which in turns kills single- and multi-threaded performance.
Work around the problem by extending per-CPU counters with a general
counter populated on "zeroing" requests -- it stores the currently found
sum. Then requests to report the current value are the sum of per-CPU
counters subtracted by the saved value.
Sample timings when loading a config with 100k tables on a 104-way box:
stock:
pfctl -f tables100000.conf 0.39s user 69.37s system 99% cpu 1:09.76 total
pfctl -f tables100000.conf 0.40s user 68.14s system 99% cpu 1:08.54 total
patched:
pfctl -f tables100000.conf 0.35s user 6.41s system 99% cpu 6.771 total
pfctl -f tables100000.conf 0.48s user 6.47s system 99% cpu 6.949 total
Reviewed by: kp (previous version)
Sponsored by: Rubicon Communications, LLC ("Netgate")
stats are not shared and consequently per-CPU counters only waste
memory.
No slowdown was measured when passing over 20M pps.
Reviewed by: kp
Sponsored by: Rubicon Communications, LLC ("Netgate")
To prevent accidentally going over a threshold which makes UMA fit only
12 objects per page instead of 13.
Reviewed by: kp
Sponsored by: Rubicon Communications, LLC ("Netgate")
ENETC NIC found in LS1028A has a bug where clearing TX pidx/cidx
causes the ring to hang after being re-enabled.
Add a new flag, if set iflib will preserve the indices during restart.
Submitted by: Kornel Duleba <mindal@semihalf.com>
Reviewed by: gallatin, erj
Obtained from: Semihalf
Sponsored by: Alstom Group
Differential Revision: https://reviews.freebsd.org/D30728
When allocating the mbuf we used m_get2 which fails
if len is superior to MJUMPAGESIZE, if its the case,
use m_getjcl instead.
Reviewed by: kp@
PR: 205164
Pull Request: https://github.com/freebsd/freebsd-src/pull/131
Add devd event on network iface address add/remove. Can be used to
automate actions on any address change.
Reviewed by: imp@ (and minor style tweaks)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D30840
Rather than pointers to the headers store full copies. This brings us
slightly closer to what OpenBSD does, and also makes more sense than
storing pointers to stack variable copies of the headers.
Reviewed by: donner, scottl
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D30719
Currently, this will still hash the default (all zero) hostuuid and
potentially arrive at a MAC address that has a high chance of collision
if another interface of the same name appears in the same broadcast
domain on another host without a hostuuid, e.g., some virtual machine
setups.
Instead of using the default hostuuid, just treat it as a failure and
generate a random LA unicast MAC address.
Reviewed by: bz, gbe, imp, kbowling, kp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29788
This simplifies life a bit, by not requiring us to repease the
declaration for every file where we want static probe points.
It also makes the gcc6 build happy.
Track (and display) the interface that created a state, even if it's a
floating state (and thus uses virtual interface 'all').
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D30245
update_rtm_from_rc() calls update_rtm_from_info() internally.
The latter one may update provided prtm pointer with a new rtm.
Reassign rtm from prtm afeter calling update_rtm_from_info() to
avoid touching the freed rtm.
PR: 255871
Submitted by: lylgood@foxmail.com
MFC after: 3 days
A successful copyinstr() call guarantees that the returned string is
nul-terminated. Furthermore, the removed check would harmlessly compare
an uninitialized byte with '\0' if the new name is shorter than
IFNAMESIZ - 1.
Reported by: KMSAN
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
While refactoring an earlier series of changes during review, the
'saved_data' variable stopped being used at the bottom of if_ioctl().
Suggested by: brooks
Reviewed by: brooks, imp, kib
Fixes: d17e0940f7 Rework compat shims in ifioctl().
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D30197
IF non-existend gateway was specified, the code responsible for calculating
an updated nexthop group, returned the same already-used nexthop group.
After the route table update, the operation result contained the same
old & new nexthop groups. Thus, the code responsible for decomposing
the notification to the list of simple nexthop-level notifications,
was not able to find any differences. As a result, it hasn't updated any
of the "simple" notification fields, resulting in empty rtentry pointer.
This empty pointer was the direct reason of a panic.
Fix the problem by returning ESRCH when the new nexthop group is the same
as the old one after applying gateway filter.
Reported by: Michael <michael.adm at gmail.com>
PR: 255665
MFC after: 3 days
This allows us to kill states created from a rule with route-to/reply-to
set. This is particularly useful in multi-wan setups, where one of the
WAN links goes down.
Submitted by: Steven Brown
Obtained from: https://github.com/pfsense/FreeBSD-src/pull/11/
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D30058
Introduce an nvlist based alternative to DIOCKILLSTATES.
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D30054
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
Fix what appears to have been a small copy/paste typo in ifconfig(8)'s
documentation (man page and header file).
Not that it matters anymore.
Reference: Table I-2 in IEEE Std 802.1Q-2014.
PR: 255557
Submitted by: Jose Luis Duran <jlduran@gmail.com>
MFC after: 1 week
Drivers can specify padding of received frames with iri_pad field.
This can be used to enforce ip alignment by hardware.
Iflib ignored that padding when processing small frames,
which rendered this feature inoperable.
I found it while writing a driver for a NIC that can ip align
received packets. Note that this doesn't change behavior of existing
drivers as they all set iri_pad to 0.
Submitted by: Kornel Duleba <mindal@semihalf.com>
Reviewed by: gallatin
Obtained from: Semihalf
Sponsored by: Alstom Group
Differential Revision: https://reviews.freebsd.org/D30009
Provide wrapper for the rnh_walktree_from() rib callback.
As currently `struct rib_head` is considered internal to the
routing subsystem, this wrapper is necessary to maintain isolation
from the external code.
Differential Revision: https://reviews.freebsd.org/D29971
MFC after: 1 week
Currently, most of the rib(9) KPI does not use rnh pointers, using
fibnum and family parameters to determine the rib pointer instead.
This works well except for the case when we initialize new rib pointers
during fib growth.
In that case, there is no mapping between fib/family and the new rib,
as an entirely new rib pointer array is populated.
Address this by delaying fib algo initialization till after switching
to the new pointer array and updating the number of fibs.
Set datapath pointer to the dummy function, so the potential callers
won't crash the kernel in the brief moment when the rib exists, but
no fib algo is attached.
This change allows to avoid creating duplicates of existing rib functions,
with altered signature.
Differential Revision: https://reviews.freebsd.org/D29969
MFC after: 1 week
Modular fib lookup framework features logic that allows
route update batching for the algorithms that cannot easily
apply the routing change without rebuilding. As a result,
dataplane lookups may return old data until the the sync
takes place. With the default sync timeout of 50ms, it is
possible that new binary like ping(8) executed exactly after
route(8) will still use the old fib data.
To address some aspects of the problem, framework executes
all rtable changes without RTF_GATEWAY synchronously.
To fix the aforementioned problem, this diff extends sync
execution for all RTF_STATIC routes (e.g. ones maintained by
route(8).
This fixes a bunch of tests in the networking space.
Reported by: ci, arichardson
MFC after: 2 weeks
b31fbebeb3 introduced alloc_sockaddr_aligned() which, in fact,
failed to produce aligned addresses.
Reported by: Oskar Holmlund <oskar.holmlund at yahoo.com>
MFC after: immediately
33cb3cb2e3 introduced an `rib_head` structure field under the
FIB_ALGO define. This may be problematic for the CTF, as some
of the files including `route_var.h` do not have `fib_algo`
defined.
Make dtrace happy by making the field unconditional.
Suggested by: markj
Add 'syncok' field to ifconfig's pfsync interface output. This allows
userspace to figure out when pfsync has completed the initial bulk
import.
Reviewed by: donner
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29948
Allow up to 5 labels to be set on each rule.
This offers more flexibility in using labels. For example, it replaces
the customer 'schedule' keyword used by pfSense to terminate states
according to a schedule.
Reviewed by: glebius
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29936
iflib now supports mapping each (TX,RX) queue pair to the same CPU
(default), to separate CPUs, or to a pair of physical and logical CPUs
that share the same L2 cache. The mapping mechanism supports unequal
numbers of TX and RX queues, with the excess queues always being
mapped to consecutive physical CPUs. When the platform cannot
distinguish between physical and logical CPUs, all are treated as
physical CPUs. See the comment on get_cpuid_for_queue() for the
entire matrix.
The following device-specific tunables influence the mapping process:
dev.<device>.<unit>.iflib.core_offset (existing)
dev.<device>.<unit>.iflib.separate_txrx (existing)
dev.<device>.<unit>.iflib.use_logical_cores (new)
The following new, read-only sysctls provide visibility of the mapping
results:
dev.<device>.<unit>.iflib.{t,r}xq<n>.cpu
When an iflib driver allocates TX softirqs without providing reference
RX IRQs, iflib now binds those TX softirqs to CPUs using the above
mapping mechanism (that is, treats them as if they were TX IRQs).
Previously, such bindings were left up to the grouptaskqueue code and
thus fell outside of the iflib CPU mapping strategy.
Reviewed by: kbowling
Tested by: olivier, pkelsey
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D24094
Traditionally we had 2 sources of information whether the
added/delete route request targets network or a host route:
netmask (RTA_NETMASK) and RTF_HOST flag.
The former one is tricky: netmask can be empty or can explicitly
specify the host netmask. Parsing netmask sockaddr requires per-family
parsing and that's what rtsock code traditionally avoided. As a result,
consistency was not enforced and it was possible to specify network with
the RTF_HOST flag and vice versa.
Continue normalization efforts from D29826 and D29826 and ensure that
RTF_HOST flag always reflects host/network data from netmask field.
Differential Revision: https://reviews.freebsd.org/D29958
MFC after: 2 days
This reverts a portion of 274579831b ("capsicum: Limit socket
operations in capability mode") as at least rtsol and dhcpcd rely on
being able to configure network interfaces while in capability mode.
Reported by: bapt, Greg V
Sponsored by: The FreeBSD Foundation
Changes to the LRO code have exposed a bug in iflib where devices
which are not capable of doing LRO are still calling
tcp_lro_flush_all(), even when they have not initialized the LRO
context. This used to be mostly harmless, but the LRO code now sets
the VNET based on the ifp in the lro context and will try to access it
through a NULL ifp resulting in a panic at boot.
To fix this, we unconditionally initializes LRO so that we have a
valid LRO context when calling tcp_lro_flush_all(). One alternative is
to check the device capabilities before calling tcp_lro_flush_all() or
adding a new state flag in the ctx. However, it seems unwise to add an
extra, mostly useless test for higher performance devices when we can
just initialize LRO for all devices.
Reviewed by: erj, hselasky, markj, olivier
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D29928
Currently, PCB caching mechanism relies on the rib generation
counter (rnh_gen) to invalidate cached nhops/LLE entries.
With certain fib algorithms, it is now possible that the
datapath lookup state applies RIB changes with some delay.
In that scenario, PCB cache will invalidate on the RIB change,
but the new lookup may result in the same nexthop being returned.
When fib algo finally gets in sync with the RIB changes, PCB cache
will not receive any notification and will end up caching the stale data.
To fix this, introduce additional counter, rnh_gen_rib, which is used
only when FIB_ALGO is enabled.
This counter is incremented by the control plane. Each time when fib algo
synchronises with the RIB, it updates rnh_gen to the current rnh_gen_rib value.
Differential Revision: https://reviews.freebsd.org/D29812
Reviewed by: donner
MFC after: 2 weeks
Address multiple issues with strict rtsock message validation.
D28668 "normalisation" approach was based on the assumption that
we always have at least "standard" sockaddr len.
It turned out to be false - certain older applications like quagga
or routed abuse sin[6]_len field and set it to the offset to the
first fully-zero bit in the mask. It is impossible to normalise
such sockaddrs without reallocation.
With that in mind, change the approach to use a distinct memory
buffer for the altered sockaddrs. This allows supporting the older
software while maintaining the guarantee on the "standard" sockaddrs.
PR: 255273,255089
Differential Revision: https://reviews.freebsd.org/D29826
MFC after: 3 days
Usually rule counters are reset to zero on every update of the ruleset.
With keepcounters set pf will attempt to find matching rules between old
and new rulesets and preserve the rule counters.
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29780
Split the PFRULE_REFS flag from the rule_flag field. PFRULE_REFS is a
kernel-internal flag and should not be exposed to or read from
userspace.
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29778
IEEE Std 802.1D-2004 Section 17.14 defines permitted ranges for timers.
Incoming BPDU messages should be checked against the permitted ranges.
The rest of 17.14 appears to be enforced already.
PR: 254924
Reviewed by: kp, donner
Differential Revision: https://reviews.freebsd.org/D29782
Fib algo uses a per-family array indexed by the fibnum to store
lookup function pointers and per-fib data.
Each algorithm rebuild currently requires re-allocating this array
to support atomic change of two pointers.
As in reality most of the changes actually involve changing only
data pointer, add a shortcut performing in-flight pointer update.
MFC after: 2 weeks
Some algorithms may require updating datapath and control plane
algo pointers after the (batched) updates.
Export fib_set_datapath_ptr() to allow setting the new datapath
function or data pointer from the algo.
Add fib_set_algo_ptr() to allow updating algo control plane
pointer from the algo.
Add fib_epoch_call() epoch(9) wrapper to simplify freeing old
datapath state.
Reviewed by: zec
Differential Revision: https://reviews.freebsd.org/D29799
MFC after: 1 week
Initial fib algo implementation was build on a very simple set of
principles w.r.t updates:
1) algorithm is ether able to apply the change synchronously (DIR24-8)
or requires full rebuild (bsearch, lradix).
2) framework falls back to rebuild on every error (memory allocation,
nhg limit, other internal algo errors, etc).
This changes brings the new "intermediate" concept - batched updates.
Algotirhm can indicate that the particular update has to be handled in
batched fashion (FLM_BATCH).
The framework will write this update and other updates to the temporary
buffer instead of pushing them to the algo callback.
Depending on the update rate, the framework will batch 50..1024 ms of updates
and submit them to a different algo callback.
This functionality is handy for the slow-to-rebuild algorithms like DXR.
Differential Revision: https://reviews.freebsd.org/D29588
Reviewed by: zec
MFC after: 2 weeks
MAP-E (RFC 7597) requires special care for selecting source ports
in NAT operation on the Customer Edge because a part of bits of the port
numbers are used by the Border Relay to distinguish another side of the
IPv4-over-IPv6 tunnel.
PR: 254577
Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D29468
Slighly relax the gateway validation rules imposed by the
2fe5a79425, by requiring only first 8 bytes (everyhing
before sdl_data to be present in the AF_LINK gateway.
Reported by: olivier
This will make future extensions of the API much easier.
The intent is to remove support for DIOCADDRULE in FreeBSD 14.
Reviewed by: markj (previous version), glebius (previous version)
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29557
The intent is to better handle time intervals with large amount of RIB
updates (e.g. BGP peer going up or down), while still keeping low sync
delay for the rest scenarios.
The implementation is the following: updates are bucketed into the
buckets of size 50ms. If the number of updates within a current bucket
exceeds the threshold of 500 routes/sec (e.g. 10 updates per bucket
interval), the update is delayed for another 50ms. This can be repeated
until the maximum update delay (1 sec) is reached.
All 3 variables are runtime tunables:
* net.route.algo.fib_max_sync_delay_ms: 1000
* net.route.algo.bucket_change_threshold_rate: 500
* net.route.algo.bucket_time_ms: 50
Differential Review: https://reviews.freebsd.org/D29588
MFC after: 2 weeks
Capsicum did not prevent certain privileged networking operations,
specifically creation of raw sockets and network configuration ioctls.
However, these facilities can be used to circumvent some of the
restrictions that capability mode is supposed to enforce.
Add capability mode checks to disallow network configuration ioctls and
creation of sockets other than PF_LOCAL and SOCK_DGRAM/STREAM/SEQPACKET
internet sockets.
Reviewed by: oshogbo
Discussed with: emaste
Reported by: manu
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D29423
Otherwise it breaks when offloading like checksum or TSO are used,
because second (encapsulated) ip_output() processing passes fragments of
the encapsulated packet down to the hardware interface.
Diagnosed by: hselasky
Reviewed by: np
Sponsored by: Nvidia Networking / Mellanox Technologies
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29501
In some settings offload might calculate hash from decapsulated packet.
Reserve a bit in packet header rsstype to indicate that.
Add m_adj_decap() that acts similarly to m_adj, but also either clear
flowid if it is not marked as inner, or transfer it to the decapsulated
header, clearing inner indicator. It depends on the internals of m_adj()
that reuses the argument packet header for the result.
Use m_adj_decap() for decapsulating vxlan(4) and gif(4) input packets.
Reviewed by: ae, hselasky, np
Sponsored by: Nvidia Networking / Mellanox Technologies
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D28773
The current code has the limit of 127 nexthop groups due to the
wrongly-checked bitmask_copy() return value.
PR: 254303
Reported by: Aleks <a.ivanov at veesp.com>
MFC after: 1 day
The netmap monitor intercepts any TX/RX packets on the monitored
port. However, before this change there was no way to tell
whether an intercepted packet was being transmitted or received
on the monitored port.
A TXMON flag in the netmap slot has been added for this purpose.
This feature enables applications to ask netmap to transmit or
receive packets starting at a user-specified offset from the
beginning of the netmap buffer. This is meant to ease those
packet manipulation operations such as pushing or popping packet
headers, that may be useful to implement software switches,
routers and other packet processors.
To use the feature, drivers (e.g., iflib, vtnet, etc.) must have
explicit support. This change does not add support for any driver,
but introduces the necessary kernel changes. However, offsets support
is already included for VALE ports and pipes.
This per-driver callback is invoked by netmap when it wants
to align the number of TX/RX netmap rings and/or the number of
TX/RX netmap slots to the actual state configured in the hardware.
The alignment happens when netmap mode is switched on (with no
active netmap file descriptors for that netmap port), or when
collecting netmap port information.
MFC after: 1 week
`struct weightened_nhop` has spare 32bit between the fields due to
the alignment (on amd64).
Not zeroing these spare bits results in duplicating nhop groups
in the kernel due to the way how comparison works.
MFC after: 1 day
In case with batch route delete via rib_walk_del(), when
some paths from the multipath route gets deleted, old
multipath group were not freed.
PR: 254496
Reported by: Zhenlei Huang <zlei.huang@gmail.com>
MFC after: 1 day
* device_printf() is effectively a printf
* if_printf() is effectively a LOG_INFO
This allows subsystems to log device/netif stuff using different log levels,
rather than having to invent their own way to prefix unit/netif names.
Differential Revision: https://reviews.freebsd.org/D29320
Reviewed by: imp
After length decisions, we've decided that the if_wg(4) driver and
related work is not yet ready to live in the tree. This driver has
larger security implications than many, and thus will be held to
more scrutiny than other drivers.
Please also see the related message sent to the freebsd-hackers@
and freebsd-arch@ lists by Kyle Evans <kevans@FreeBSD.org> on
2021/03/16, with the subject line "Removing WireGuard Support From Base"
for additional context.
This is the culmination of about a week of work from three developers to
fix a number of functional and security issues. This patch consists of
work done by the following folks:
- Jason A. Donenfeld <Jason@zx2c4.com>
- Matt Dunwoodie <ncon@noconroy.net>
- Kyle Evans <kevans@FreeBSD.org>
Notable changes include:
- Packets are now correctly staged for processing once the handshake has
completed, resulting in less packet loss in the interim.
- Various race conditions have been resolved, particularly w.r.t. socket
and packet lifetime (panics)
- Various tests have been added to assure correct functionality and
tooling conformance
- Many security issues have been addressed
- if_wg now maintains jail-friendly semantics: sockets are created in
the interface's home vnet so that it can act as the sole network
connection for a jail
- if_wg no longer fails to remove peer allowed-ips of 0.0.0.0/0
- if_wg now exports via ioctl a format that is future proof and
complete. It is additionally supported by the upstream
wireguard-tools (which we plan to merge in to base soon)
- if_wg now conforms to the WireGuard protocol and is more closely
aligned with security auditing guidelines
Note that the driver has been rebased away from using iflib. iflib
poses a number of challenges for a cloned device trying to operate in a
vnet that are non-trivial to solve and adds complexity to the
implementation for little gain.
The crypto implementation that was previously added to the tree was a
super complex integration of what previously appeared in an old out of
tree Linux module, which has been reduced to crypto.c containing simple
boring reference implementations. This is part of a near-to-mid term
goal to work with FreeBSD kernel crypto folks and take advantage of or
improve accelerated crypto already offered elsewhere.
There's additional test suite effort underway out-of-tree taking
advantage of the aforementioned jail-friendly semantics to test a number
of real-world topologies, based on netns.sh.
Also note that this is still a work in progress; work going further will
be much smaller in nature.
MFC after: 1 month (maybe)
swi_remove() removes the software interrupt handler but does not remove
the associated interrupt event.
This is visible when creating and remove a vnet jail in `procstat -t
12`.
We can remove it manually with intr_event_destroy().
PR: 254171
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29211
Receive Segment Coalescing (RSC) in the vSwitch is a feature available in
Windows Server 2019 hosts and later. It reduces the per packet processing
overhead by coalescing multiple TCP segments when possible. This happens
mostly when TCP traffics are among different guests on same host.
This patch adds netvsc driver support for this feature.
The patch also updates NVS version to 6.1 as needed for RSC
enablement.
MFC after: 2 weeks
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D29075
Summary:
This fixes rtentry leak for the cloned interfaces created inside the
VNET.
PR: 253998
Reported by: rashey at superbox.pl
MFC after: 3 days
Loopback teardown order is `SI_SUB_INIT_IF`, which happens after `SI_SUB_PROTO_DOMAIN` (route table teardown).
Thus, any route table operations are too late to schedule.
As the intent of the vnet teardown procedures to minimise the amount of effort by doing global cleanups instead of per-interface ones, address this by adding a relatively light-weight routing table cleanup function, `rib_flush_routes()`.
It removes all remaining routes from the routing table and schedules the deletion, which will happen later, when `rtables_destroy()` waits for the current epoch to finish.
Test Plan:
```
set_skip:set_skip_group_lo -> passed [0.053s]
tail -n 200 /var/log/messages | grep rtentry
```
Reviewers: #network, kp, bz
Reviewed By: kp
Subscribers: imp, ae
Differential Revision: https://reviews.freebsd.org/D29116
If we hit an error during init, then we'll unwind our state and attempt
to detach the device -- don't block it.
This was discovered by creating a wg0 with missing parameters; said
failure ended up leaving this orphaned device in place and ended up
panicking the system upon enumeration of the dev.* sysctl space.
Reviewed by: gallatin, markj
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D29145
This structure is shared among multiple instances of a driver, so we
should ensure that it doesn't somehow get treated as if there's a
separate instance per interface. This is especially important for
software-only drivers like wg.
DEVICE_REGISTER() still returns a void * and so the per-driver sctx
structures are not yet defined with the const qualifier.
Reviewed by: gallatin, erj
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29102
Drain the callbacks upon if_deregister_com_alloc() such that the
if_com_free[type] won't be nullified before if_destroy().
Taking fwip(4) as an example, before this fix, kldunload if_fwip will
go through the following:
1. fwip_detach()
2. if_free() -> schedule if_destroy() through NET_EPOCH_CALL
3. fwip_detach() returns
4. firewire_modevent(MOD_UNLOAD) -> if_deregister_com_alloc()
5. kernel complains about:
Warning: memory type fw_com leaked memory on destroy (1 allocations, 64 bytes leaked).
6. EPOCH runs if_destroy() -> if_free_internal()i
By this time, if_com_free[if_alloctype] is NULL since it's already
nullified by if_deregister_com_alloc(); hence, firewire_free() won't
have a chance to release the allocated fw_com.
Reviewed by: hselasky, glebius
MFC after: 2 weeks
This structure is only used by the kernel module internally. It's not
shared with user space, so hide it behind #ifdef _KERNEL.
Sponsored by: Rubicon Communications, LLC ("Netgate")
In some configurations we need more classes than ALTQ supports by
default. Increase the maximum number of classes we allow.
This will only cost us a comparatively trivial amount of memory, so
there's little reason not to do so.
If ever we find we want even more we may want to consider turning these
defines into a tunable, but for now do the easy thing.
Reviewed by: donner@
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29034
Introduce convenience macros to retrieve the DSCP, ECN or traffic class
bits from an IPv6 header.
Use them where appropriate.
Reviewed by: ae (previous version), rscheff, tuexen, rgrimes
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29056
For interfaces with admin completion queues, introduce a new devmethod
IFDI_ADMIN_COMPLETION_HANDLE and a corresponding flag IFLIB_HAS_ADMINCQ.
This provides an option for handling any admin cq logic, which cannot be
run from an interrupt context.
Said method is called from within iflib's admin task, making it safe to
sleep.
Reviewed by: mmacy
Submitted by: Artur Rojek <ar@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Differential Revision: https://reviews.freebsd.org/D28708
Commit 6dd69f0064 ("iflib: introduce isc_dma_width")
failed to build on powerpc due to implicit type conversion
error. Fix that.
Submitted by: Artur Rojek <ar@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Some DMA controllers are unable to address the full host memory space
and are instead limited to a subset of address range (e.g. 48-bit).
Allow the driver to specify the maximum allowed DMA addressing width
(in bits) for the NIC hardware, by introducing a new field in
if_softc_ctx.
If said field is omitted (set to 0), the lowaddr of DMA window bounds
defaults to BUS_SPACE_MAXADDR.
Submitted by: Artur Rojek <ar@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Differential Revision: https://reviews.freebsd.org/D28706
iflib_rxeof() was counting everything twice. This was introduced when
pfil hooks were added to the iflib receive path. We want to count rx
packets/bytes before the pfil hooks are executed, so remove the counter
adjustments that are executed after.
PR: 253583
Reviewed by: gallatin, erj
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28900
When the bridge is moved to a different vnet we must remove all of its
member interfaces (and span interfaces), because we don't know if those
will be moved along with it. We don't want to hold references to
interfaces not in our vnet.
Reviewed by: donner@
MFC after: 1 week
Sponsored by: Orange Business Services
Differential Revision: https://reviews.freebsd.org/D28859
VLAN devices have type IFT_L2VLAN, so the STP code mistakenly believed
they couldn't be used for STP. That's not the case, so add the
ITF_L2VLAN to the check.
Reviewed by: donner@
MFC after: 1 week
Sponsored by: Orange Business Services
Differential Revision: https://reviews.freebsd.org/D28857
The routing stack control depends on quite a tree of functions to
determine the proper attributes of a route such as a source address (ifa)
or transmit ifp of a route.
When actually inserting a route, the stack needs to ensure that ifa and ifp
points to the entities that are still valid.
Validity means slightly more than just pointer validity - stack need guarantee
that the provided objects are not scheduled for deletion.
Currently, callers either ignore it (most ifp parts, historically) or try to
use refcounting (ifa parts). Even in case of ifa refcounting it's not always
implemented in fully-safe manner. For example, some codepaths inside
rt_getifa_fib() are referencing ifa while not holding any locks, resulting in
possibility of referencing scheduled-for-deletion ifa.
Instead of trying to fix all of the callers by enforcing proper refcounting,
switch to a different model.
As the rib_action() already requires epoch, do not require any stability guarantees
other than the epoch-provided one.
Use newly-added conditional versions of the refcounting functions
(ifa_try_ref(), if_try_ref()) and fail if any of these fails.
Reviewed by: donner
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D28837
When we have an ifp pointer and the code is running inside epoch,
epoch guarantees the pointer will not be freed.
However, the following case can still happen:
* in thread 1 we drop to refcount=0 for ifp and schedule its deletion.
* in thread 2 we use this ifp and reference it
* destroy callout kicks in
* unhappy user reports a bug
This can happen with the current implementation of ifnet_byindex_ref(),
as we're not holding any locks preventing ifnet deletion by a parallel thread.
To address it, add if_try_ref(), allowing to return failure when
referencing ifp with refcount=0.
Additionally, enforce existing if_ref() is with KASSERT to provide a
cleaner error in such scenarios.
Finally, fix ifnet_byindex_ref() by using if_try_ref() and returning NULL
if the latter fails.
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D28836
rtsock message validation changes committed in 2fe5a79425
did not take llinfo messages into account.
Add a special validation case for RTA_GATEWAY llinfo messages.
MFC after: 2 days
In commit 38bfc6dee3 we added an IFDI_DETACH() call to
iflib_pseudo_deregister() since it looked like it was missing. One is
present in the error-handling path of iflib_pseudo_register(). However,
the detach actually comes from the DEVICE_DETACH() method for the
above-mentioned device_t, so now we're calling IFDI_DETACH() twice when
destroying a pseudo interface.
Fix the problem by not calling IFDI_DETACH() from the device detach
routine. This way we can ensure that iflib de-initialization always
happens in a consistent order. It also ensures that you can't do silly
things like "devctl detach <pseudo ifnet>", which would previously
detach the driver without tearing down the corresponding ifnet.
PR: 253541
Reviewed by: erj
MFC after: 1 week
Fixes: 38bfc6dee3
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28774
Changes in the 2fe5a79425 moved dst sockaddr masking from the
routing control plane to the rtsock code.
It broke arp/ndp deletion.
It turns out, arp/ndp perform RTM_GET request first to get an
interface index necessary for the deletion.
Then they simply stamp the reply with RTF_LLDATA and set the
command to RTM_DELETE.
As a result, kernel receives request with non-empty RTA_NETMASK
and clears RTA_DST host bits before passing the message to the
lla code.
De facto, the only needed bits are RTA_DST, RTA_GATEWAY and the
subset of rtm_flags.
With that in mind, fix the interace by clearing RTA_NETMASK
for every messages with RTF_LLDATA.
While here, cleanup arp/ndp code a bit.
MFC after: 1 day
Reviewed by: gnn
Differential Revision: https://reviews.freebsd.org/D28804
This fixes a warning from GCC for kernels without netmap since the
return value is never used.
Reviewed by: vmaffione, erj
Differential Revision: https://reviews.freebsd.org/D28598
Traditionally routing socket code did almost zero checks on
the input message except for the most basic size checks.
This resulted in the unclear KPI boundary for the routing system code
(`rtrequest*` and now `rib_action()`) w.r.t message validness.
Multiple potential problems and nuances exists:
* Host bits in RTAX_DST sockaddr. Existing applications do send prefixes
with hostbits uncleared. Even `route(8)` does this, as they hope the kernel
would do the job of fixing it. Code inside `rib_action()` needs to handle
it on its own (see `rt_maskedcopy()` ugly hack).
* There are multiple way of adding the host route: it can be DST without
netmask or DST with /32(/128) netmask. Also, RTF_HOST has to be set correspondingly.
Currently, these 2 options create 2 DIFFERENT routes in the kernel.
* no sockaddr length/content checking for the "secondary" fields exists: nothing
stops rtsock application to send sockaddr_in with length of 25 (instead of 16).
Kernel will accept it, install to RIB as is and propagate to all rtsock consumers,
potentially triggering bugs in their code. Same goes for sin_port, sin_zero, etc.
The goal of this change is to make rtsock verify all sockaddr and prefix consistency.
Said differently, `rib_action()` or internals should NOT require to change any of the
sockaddrs supplied by `rt_addrinfo` structure due to incorrectness.
To be more specific, this change implements the following:
* sockaddr cleanup/validation check is added immediately after getting sockaddrs from rtm.
* Per-family dst/netmask checks clears host bits in dst and zeros all dst/netmask "secondary" fields.
* The same netmask checking code converts /32(/128) netmasks to "host" route case
(NULL netmask, RTF_HOST), removing the dualism.
* Instead of allowing ANY "known" sockaddr families (0<..<AF_MAX), allow only actually
supported ones (inet, inet6, link).
* Automatically convert `sockaddr_sdl` (AF_LINK) gateways to
`sockaddr_sdl_short`.
Reported by: Guy Yur <guyyur at gmail.com>
Reviewed By: donner
Differential Revision: https://reviews.freebsd.org/D28668
MFC after: 3 days
