Adding support for TCP over UDP allows communication with
TCP stacks which can be implemented in userspace without
requiring special priviledges or specific support by the OS.
This is joint work with rrs.
Reviewed by: rrs
Sponsored by: Netflix, Inc.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29469
We must make sure that incoming packets will never overflow the netmap
buffers, even when the user is using the offset feature. In the typical
scenario, the netmap buffer is 2KiB and, with an MTU of 1500, there are
~500 bytes available for user offsets.
Unfortunately, some NICs accept incoming packets even when they are
larger then the MTU. This means that the only way to stop DMA from
overflowing the netmap buffers, when offsets are allowed, is to choose
a hardware buffer length which is smaller than the netmap buffer
length. For most NICs and for 2KiB netmap buffers, this means 1024
bytes, which is unconveniently small.
The current code will select the small hardware buf size even when
offsets are not in use. The main purpose of this change is to
fix this bug by returning to the normal behavior for the no-offsets
case.
At the same time, the patch pushes the handling of the offset case
to the lower level driver code, so that it can be made NIC-specific
(in future patches).
"zgrep --version" is expected to print the version information in the
same way as "zgrep -V". However, the case handling the --version flag
is never reached, so "zgrep --version" prints:
zgrep: missing pattern
instead of:
grep (BSD grep, GNU compatible) 2.6.0-FreeBSD
Reviewed by: yuripv
Approved by: yuripv (src)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29813
Remove files added by b51f459a20.
The util/config.c conflicts with wpa_supplicant/config.c causing
the linker error.
The proper approach would have been to prepare the wpa build to
build the various subdirectories into .a libraries. SRCS makes no
distinction between files of the same name. The MFV accounted for this
but the revert failed to remove the additional files, including the
conflicting utils/config.c.
It might be unclear why newfs and newfs_msdos should cross-reference
each other. Add a note explaining it.
This is a follow-up to 74bd207697.
Reported by: kib
Reviewed by: imp, kib, rpokala
MFC after: 3 days
It seems to be a nice idea to show how fork() is usually used in
practice. This may act as a guide to developers who want to quickly
recall how to use the fork() function.
Reviewed by: bcr, yuripv
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D27626
It seems that the number of lines is no longer an optional parameter to
the -C flag. Document it accordingly both in the manual page and the
usage message.
Reviewed by: yuripv
Approved by: yuripv
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D28509
Use ${PICFLAG} rather than hard-adding -fPIC, which removes the
requirement for libnv to be built PIC.
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
driver_t was supposed to just be a quick hack for 4.x
compatibility. However, it's been documented now as the preferred API
rather than the replacement kobj_class_t. Drop the note about 4.x since
it's clear we're a bit late to retiring its use through the tree with
almost 1500 references to driver_t.
Sponsored by: Netflix
Maintain code similarity between RACK and base stack
for ECN. This may not strictly be necessary, depending
when a state transition to FIN_WAIT_1 is done in RACK
after a shutdown() or close() syscall.
MFC after: 3 days
Reviewed By: tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29658
b51f459a20 resulted in a mismerge
due to having to do a remerge because my tree was over a week out of
date. Changes that were made to fix the build were lost in the remerge
resulting in build errors that were fixed a week ago.
First, two of those four checks are unreachable.
Second, I don't believe there should be ">=" instead of ">".
Third, bus_dma(9) already returns the same EFBIG if ">".
This fixes false I/O errors in worst S/G cases with maxphys >= 2MB.
MFC after: 1 week
This is the April update to vendor/wpa committed upstream
2021/04/07.
This is MFV efec822389.
Suggested by: philip
Reviewed by: philip
MFC after: 2 months
Differential Revision: https://reviews.freebsd.org/D29744
Explicitly disable ring synchronization before calling
callbacks that may result in a hardware reset.
Before this patch we relied on capturing the down/up events which,
however, may not be issued by all drivers.
As full support of RFC6675 is in place, deprecating
net.inet.tcp.rfc6675_pipe and enabling by default
net.inet.tcp.sack.revised.
Reviewed By: #transport, kbowling, rrs
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D28702
"It looks like it would be less confusing to rename 'count' to
something like 'idx', since that's what it's used for in this
function."
Reviewed by: erj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29798
Adds OPAL_CONSOLE_WRITE error handling and implements a call to
OPAL_CONSOLE_WRITE_BUFFER_SPACE to verify if there's enough space
before writing to console.
This fixes serial port output getting corrupted on fast writes, like
on "dmesg" output.
Tested on Raptor Blackbird running powerpc64 BE kernel
Reviewed by: luporl
Sponsored by: Eldorado Reserach Institute (eldorado.org.br)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29063
There is a weird limit of AGTIAPI_MAX_DMA_SEGS (128) S/G segments per
I/O since the initial driver import. I don't know why it was added,
can only guess some hardware limitation, but in worst case it means
maximum I/O size of 508KB. Respect it to be safe, rounding to 256KB.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
It is a direct request for data corruptions, one report of which we
have received. I am very surprised that only one.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Without it, Qt5 apps from Focal fail to start, being unable to load
their plugins. It's also necessary for glibc 2.33, as found in recent
Arch snapshots.
PR: 254112
Reviewed By: kib
Sponsored by: The FreeBSD Foundation, EPSRC
Differential Revision: https://reviews.freebsd.org/D28192
Use M_NOWAIT flag when hash growing is called from callout.
PR: 255041
Reviewed by: kevans
MFC after: 10 days
Differential Revision: https://reviews.freebsd.org/D29772
This restores behavior lost in code cleanup, fixing a regression after
2803fa471e where changing media options
only applies some of the changes, not all.
Reported by: np
Reviewed by: donner
MFC after: immediately
Differential Revision: https://reviews.freebsd.org/D29741
A security feature from c06f087ccb appeared to be a huge bottleneck
under SYN flood. To mitigate that add a sysctl that would make
syncache(4) globally visible, ignoring UID/GID, jail(2) and mac(4)
checks. When turned on, we won't need to call crhold() on the listening
socket credential for every incoming SYN packet.
Reviewed by: bz
This reverts commit 9edaceca81.
It turns out that the Linux client intentionally does an NFSv4.1
RPC with only a Sequence operation in it and with "seqid + 1"
for the slot. This is used to re-synchronize the slot's seqid
and the client expects the NFS4ERR_SEQ_MISORDERED error reply.
As such, revert the patch, so that the server remains RFC5661
compliant.
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
Restore 525e07418c after the iflib conversion of igb(4). This
reenables random MAC address generation when attaching to a VF with a
zeroed MAC.
PR: 253535
Reported by: Balaev PA <mail@void.so>
Reviewed by: markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D29785
The boundary differentiating "lem" vs "em" class devices was wrong
after the iflib conversion of lem(4).
The Packet Buffer size for 82547 class chips was not set correctly
after the iflib conversion of lem(4).
These changes restore functionality on an 82547 for the submitter.
PR: 236119
Reported by: Jeff Gibbons <jgibbons@protogate.com>
Reviewed by: markj
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D29766
This is a debugging tunable that shouldn't have retained this setting
after the initial iflib conversion of the driver
PR: 248934
Reported by: Franco Fichtner <franco@opnsense.org>
Reviewed by: markj
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D29768
This avoids build failures due to the clang 12 warning:
'#pragma FENV_ACCESS' is not supported on this target - ignored
Clang 12 currently emits this warning for all non-x86 architectures.
While this can result in incorrect code generation (e.g. on AArch64 some
exceptions are not raised as expected), this is a pre-existing issue and
we should not fail the build due to this warning.
Reviewed By: dim, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29743
As this controller requires firmware patch downloading to operate.
"Intel Wireless 7265" support in iwmbtfw(8) is yet to be done.
Tested by: arrowd et al
PR: 228787
MFC after: 2 weeks
Unconditional execution of "clear feature" request at SETUP stage was
workaround for probe failures on ng_ubt.ko re-kldloading which is
unnecessary now.
Reviewed by: hselasky
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D29775
