fragmented packets.
When sending IPv4 and IPv6 fragmented packets and a fragment is lost,
the mbuf making up the fragment will remain in the temporary hashed
fragment list for a while. If the network interface departs before the
so-called slow timeout clears the packet, the fragment causes a panic
when the timeout kicks in due to accessing a freed network interface
structure.
Make sure that when a network device is departing, all hashed IPv4 and
IPv6 fragments belonging to it, get freed.
Backtrace:
panic()
icmp6_reflect()
hlim = ND_IFINFO(m->m_pkthdr.rcvif)->chlim;
^^^^ rcvif->if_afdata[AF_INET6] is NULL.
icmp6_error()
frag6_freef()
frag6_slowtimo()
pfslowtimo()
softclock_call_cc()
softclock()
ithread_loop()
Differential Revision: https://reviews.freebsd.org/D19622
Reviewed by: bz (network), adrian
MFC after: 1 week
Sponsored by: Mellanox Technologies
According to specs and common sense, all sense data reported in descriptor
format should be valid. But practice shows different, some devices return
descriptors with invalid data, resulting in error messages looking worse.
Decouple block/stream commands sense data and information field printing.
Looking on present specs, there are much more cases when those fields are
not related, and incomplete old code was not printing valid sense data and
leaving empty lines for invalid.
MFC after: 2 weeks
There is an (obvious) typo in the following sentence:
"Please note, that keep-state amd limit imply implicit check-state for ..."
Replace the "amd" with "and", bump .Dd.
PR: 237438
Submitted by: michael@galassi.us
MFC after: 3 days
occasional spurious interrupts are a normal thing on this hardware. Also,
change the name of the cpu-local interrupt controller driver from local_intc
to lintc, because the name gets built into interrupt names, which have to
fit into a 19-byte field for stats reporting (so this allows 5 more bytes
of the actual interrupt name to be displayed).
code for reading from the frame buffer.
Reading from the frame buffer is usually much slower than writing to
the frame buffer. Typically 10 to 100 times slower. It old modes,
it takes many more PIOs, and in newer modes with no PIOs writes are
often write-combined while reads remain uncached.
Reading from the frame buffer is not very common, so this change doesn't
give speedups of 10 to 100 times. My main test case is a floodfill()
function that reads about as many pixels as it writes. The speedups
are typically a factor of 2 to 4.
Duplicating writes to the shadow buffer is slower when no reads from the
frame buffer are done, but reads are often done for the pixels under the
mouse cursor, and doing these reads from the shadow buffer more than
compensates for the overhead of writing the shadow buffer in at least the
slower modes. Management of the mouse cursor also becomes simpler.
The shadow buffer doesn't take any extra memory, except twice as much
in old 4-plane modes. A buffer for holding a copy of the frame buffer
was allocated up front for use in the screen switching signal handler.
This wasn't changed when the handler was made async-signal safe. Use
the same buffer the shadow (but make it twice as large in the 4-plane
modes), and remove large special code for writing it as well as large
special code for reading ut. It used to have a rawer format in the
4-plane modes. Now it has a bitmap format which takes twice as much
memory but can be written almost as fast without special code.
VIDBUFs that are not the whole frame buffer were never supported, and the
change depends on this. Check for invalid VIDBUFs in some places and do
nothing. The removed code did something not so good.
One of the fun issues with scanning has been how the existing
ANI values were programmed into the hardware when channels were
changed. If you're on a really crappy channel and ANI has made
you deaf then when you scan you continue to be deaf on all channels.
This code passes in a flag to startpcureceive which in AR5416 and later
is also used to enable ANI. This allows it to know if it's a normal
operation or a scan operation.
This fixes my situation at home where a temporary spot of a device
going deaf due to interference starts scanning and .. can't hear
anything until I restart.
Now, this isn't the full fix - ideally:
(a) all the ANI config and per-channel information would be migrated
to the shared HAL stuff and enabled for all of the NICs;
(b) when a station reassociates and some other error conditions
(like missed beacons, NF calibration failures, etc) a knob
to reset ANI parameters would likely help recovery.
But hey, I'm committing bits of code again! woo!
Tested:
* AR9344 (2G), STA operation
This fixes a bug where, even when hw.psm.tap_enabled=0, touchpad taps
were processed.
tap_enabled has three states: unconfigured, disabled, and enabled (-1, 0, 1).
To respect PR kern/139272, taps are ignored only when explicity disabled.
Submitted by: Ben LeMasurier <ben@crypt.ly> (initial version)
MFC after: 2 weeks
Ignoring of gesture processing when the palm is detected helps to reduce
some of the erratic pointer behavior.
This fixes regression introduced in r317814
Reported by: Ben LeMasurier <ben@crypt.ly>
MFC after: 2 weeks
not doing any unnecessary PIO instructions or refusing to start when the
i/o privilege needed for these instructions cannot be acquired.
This turns off useless palette management in direct modes. Palette
management had no useful effect since the hardware palette is not used
in these modes.
This transiently acquires i/o privilege if possible as needed to give
VGLSetBorder() and VGLBlankDisplay() a chance of working. Neither has
much chance of working. I was going to drop support for them in direct
modes, but found that VGLBlankDisplay() still works with an old graphics
card on a not so old LCD monitor.
This has some good side effects: reduce glitches for managing the palette
for screen switches, and speed up and reduce async-signal-unsafeness in
mouse cursor drawing.
My wide sweeping stylistic change (while well intended) is impeding others from
working on `tests/sys/opencrypto`.
The plan is to revert the change in ^/head, then reintroduce the changes after
the other changes get merged into ^/head .
Approved by: emaste (mentor; implicit)
Requested by: jhb
MFC after: 2 months
The logic was present for the 11 version of the DIOCSKERNELDUMP ioctl, but
had not been updated for the 12 ABI.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D19980
Replace hard tabs with four-character indentations, per PEP8.
This is being done to separate stylistic changes from the tests from functional
ones, as I accidentally introduced a bug to the tests when I used four-space
indentation locally.
No functional change.
MFC after: 2 months
Approved by: emaste (mentor: implicit blanket approval for trivial fixes)
When aliasing a kernel module to a different name (ie if_igb for if_em),
it's better to use symlinks than hard links. kldxref will omit entries for
the links, ensuring that the loaded module has the correct name.
Reviewed by: imp
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19979
There's a number of EFI_ZFS_BOOT #ifdefs that aren't needed, or can be
eliminated with some trivial #defines. Remove the EFI_ZFS_BOOT ifdefs
that aren't needed. Replace libzfs.h include which is not safe to
include without EFI_ZFS_BOOT with efizfs.h which is and now
conditionally included libzfs.h. Define efizfs_set_preferred away
and define efi_zfs_probe to NULL when ZFS is compiled out.
Jobs using the @<second> syntax currently only get executed if they exist
when cron is started. The simplest reproducer of this is:
echo '@20 root echo "Hello!"' >> /etc/cron.d/myjob
myjob will get loaded at the next second==0, but this echo job will not
run until cron restarts. These jobs are normally handled in
run_reboot_jobs(), which sets e->lastexit of INTERVAL jobs to the startup
time so they run 'n' seconds later.
Fix this by special-casing TargetTime > 0 in the database load. Preexisting
jobs will be handled at startup during run_reboot_jobs as normal, but if
we've reloaded a database during runtime we'll hit this case and set
e->lastexit to the current time when we process it. They will then run every
'n' seconds from that point, and a full restart of cron is no longer
required to make these jobs work.
Reported by: Juraj Lutter (otis_sk.freebsd.org)
Reviewed by: allanjude, bapt, bjk (earlier version), Juraj Lutter
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D19924
Since writes don't necessarily need to be on erase-block boundaries, we can
relax the block size and alignments down to sector size. If it needs to be
erased, opalflash_erase() will check proper alignment and size.
I do not know of an extant NFSv4.1 client that currently does a Setattr
operation for the ModeSetMasked, but it has been discussed on the linux-nfs
mailing list.
This patch adds support for doing a Setattr of ModeSetMasked, so that it
will work for any future NFSv4.1 client that chooses to do so.
Tested via a hacked FreeBSD NFSv4.1 client.
MFC after: 2 weeks
At the time of this nfsv4_sattr() call, "vp == NULL", so this patch doesn't
change the semantics, but I think it makes the code more readable.
It also makes it consistent with the nfsv4_sattr() call a few lines above
this one. Found during code inspection.
MFC after: 2 weeks
screen bitmap and within a single MEMBUF were broken when first source
line is before the first destination line and the sub-bitmaps overlap.
The fix just copies horizontal lines in reverse order when the first
source line is before the first destination line. This switches
directions unnecessarily in some cases, but the switch is about as
fast as doing a precise detection of overlaps. When the first lines
are the same, there can be undetected overlap in the horizontal
direction. The old code already handles this mostly accidentally by
using bcopy() for MEMBUFs and by copying through a temporary buffer
for the screen bitmap although the latter is sub-optimal in direct
modes.
-Wformat-zero-length does not highlight any particularly wrong code and it
is especially meaningless for device_printf(). Turn it off entirely to
remove a source of false positives.
Sponsored by: Dell EMC Isilon
It is a useful arc4random wrapper in the kernel for much the same reasons as
in userspace. Move the source to libkern (because kernel build is
restricted to sys/, but userspace can include any file it likes) and build
kernel and libc versions from the same source file.
Copy the documentation from arc4random_uniform(3) to the section 9 page.
While here, add missing arc4random_buf(9) symlink.
Sponsored by: Dell EMC Isilon
In anticipation of new functionality, create routines to convert char *
and a CHAR16 * to a EFI_DEVICE_PATH
EFI_DEVICE_PATH *efi_name_to_devpath(const char *path);
EFI_DEVICE_PATH *efi_name_to_devpath16(CHAR16 *path);
void efi_devpath_free(EFI_DEVICE_PATH *dp);
The first two return an EFI_DEVICE_PATH for the passed in paths. The
third frees up the storage the first two return when the caller is
done with it.
Differential Revision: https://reviews.freebsd.org/D19971
Add definitions from UEFI 2.7 Errata B standards doc for converting a
text string to a device path. Added clearly missing 'e' at the end of
Device to resolve mismatch in that document in
EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL element names.
Differential Revision: https://reviews.freebsd.org/D19971
Newer interfaces take CONST parameters, so define CONST to minimize
differences between our headers and the standards docs.
Differential Revision: https://reviews.freebsd.org/D19971
IPPROTO_IPV6 level socket option IPV6_CHECKSUM enabled and the
checksum check fails, drop the message. Without this fix, an
ICMP6 message was sent indicating a parameter problem.
Thanks to bz@ for suggesting a way to simplify this fix.
Reviewed by: bz@
MFC after: 1 week
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D19969
is requested by the application using the IPPROTO_IPV6 level socket option
IPV6_CHECKSUM on a raw socket, ensure that the packet contains enough
bytes to contain the checksum at the specified offset.
Reported by: syzbot+6295fcc5a8aced81d599@syzkaller.appspotmail.com
Reviewed by: bz@
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D19968
as requested by the user via the IPPROTO_IPV6 level socket option
IPV6_CHECKSUM. The check if there are enough bytes in the packet to
store the checksum at the requested offset was wrong by 1.
Reviewed by: bz@
MFC after: 1 week
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D19967
When using the IPPROTO_IPV6 level socket option IPV6_CHECKSUM on a raw
IPv6 socket, ensure that the value is either -1 or a non-negative even
number.
Reviewed by: bz@, thj@
MFC after: 1 week
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D19966
Add a stat counter to track ipv6 atomic fragments. Atomic fragments can be
generated in response to invalid path MTU values, but are also a potential
attack vector and considered harmful (see RFC6946 and RFC8021).
While here add tracking of the atomic fragment counter to netstat and systat.
Reviewed by: tuexen, jtl, bz
Approved by: jtl (mentor), bz (mentor)
Event: Aberdeen hackathon 2019
Differential Revision: https://reviews.freebsd.org/D17511
I believe previous ifdef caused NULL dereference in later zfs_log_create()
on attempt to create file inside directory belonging to ephemeral group
created on illumos, trying to write to log information about GID domain
of the newly created file, inheriting the ephemeral GID.
This patch reuses original illumos SGID code with exception that due to
lack of ID mapping code on FreeBSD ephemeral GID will turn into GID_NOBODY
by another ifdef inside zfs_fuid_map_id().
MFC after: 1 month
Sponsored by: iXsystems, Inc.
