According to 802.1Q-2014, VLAN tagged packets with VLAN id 0 should be
considered as untagged, and only PCP and DEI values from the VLAN tag
are meaningful. See for instance
https://www.cisco.com/c/en/us/td/docs/switches/connectedgrid/cg-switch-sw-master/software/configuration/guide/vlan0/b_vlan_0.html.
Make it possible to specify PCP value for outgoing packets on an
ethernet interface. When PCP is supplied, the tag is appended, VLAN
id set to 0, and PCP is filled by the supplied value. The code to do
VLAN tag encapsulation is refactored from the if_vlan.c and moved into
if_ethersubr.c.
Drivers might have issues with filtering VID 0 packets on
receive. This bug should be fixed for each driver.
Reviewed by: ae (previous version), hselasky, melifaro
Sponsored by: Mellanox Technologies
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D14702
If the operation is not an update, if neither r/w nor r/o mode is
explicitly requested, if the error code hints at the possibility of the
media being read-only, and if the fallback is allowed, then we can try
to automatically downgrade to the readonly mode.
This is especially useful for auto-mounting of removable media that
sometimes can happen to be write-protected.
The fallback to r/o is not enabled by default. It can be requested on a
per-mount basis with a new mount option, 'autoro'. Or it can be
globally allowed by setting vfs.default_autoro.
Reviewed by: cem, kib
MFC after: 3 weeks
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D13361
Followup to r313780. Also prefix ext2's and nandfs's versions with
EXT2_ and NANDFS_.
Reported by: kib
Reviewed by: kib, mckusick
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D9623
It allows to change namespace parameters, such as block size, metadata,
protection information, etc. and/or erase the data.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
ip_reass() expects IPv4 packet and will just corrupt any IPv6 packets
that it gets. Until proper IPv6 fragments handling function will be
implemented, pass IPv6 packets to next rule.
PR: 170604
MFC after: 1 week
Most sysctl nodes only return a single value, but some nodes return an
array of values (e.g. kern.cp_time). sysctl(8) understand how to display
the values of a node that returns multiple values (it prints out each
numeric value separated by spaces). However, until now sysctl(8) has
only been able to set sysctl nodes to a single value. This change
allows sysctl to accept a new value for a numeric sysctl node that contains
multiple values separated by either spaces or commas. sysctl(8) parses
this list into an array of values and passes the array as the "new" value
to sysctl(2).
Reviewed by: rpokala
MFC after: 1 week
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D14569
The lookup_host() helper subroutine emits a struct in_addr value in network
byte order via caller passed pointer. However, the table value is expected
to be stored in host byte order. On little-endian machines, this produced a
reversed endian table value for Legacy or IPv4 table types when the value
was a hostname (instead of a plain IP address).
Fix by using ntohl() on the output 32-bit address.
While here, avoid some aliasing violations by storing the lookup_host()
output in an intermediate object of the correct type.
PR: 226429
Reported by: bugs.freebsd.org AT mx.zzux.com (also: Tested by)
Security: ipfw hostname table rules could potentially not act as admin intended
Sponsored by: Dell EMC Isilon
When dhclient first starts, if an old IP address exists in the
dhclient.leases file, dhclient(8) sends early DHCPREQUEST message(s)
in an attempt to re-obtain the old IP address again. These messages
contain the old IP as a requested-IP-address option in the message
body (correct) but also use the old IP address as the packet's source
IP (incorrect).
RFC2131 sec 4.1 states:
DHCP messages broadcast by a client prior to that client obtaining
its IP address must have the source address field in the IP header
set to 0.
The use of the old IP as the packet's source address is incorrect if
(a) the computer is now on a different network or (b) it is on the
same network, but the old IP has been reallocated to another host.
Fix dhclient to use 0.0.0.0 as the source IP in this circumstance
without removing any existing functionality. Any previously-used old
IP is still requested in the body of an early DHCPREQUEST message.
PR: 199378
Submitted by: J.R. Oldroyd <fbsd@opal.com>
Reported by: J.R. Oldroyd <fbsd@opal.com>
Reviewed by: cem, asomers, vangyzen
MFC after: 1 week
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D14527
nothing - it was checking for ENXIO, which, with devfs, is no longer
returned - and was badly placed anyway, and replaces it with similar
one that works, and is done just before starting getty, instead of being
done when rereading ttys(5).
From the practical point of view, this makes init(8) handle disappearing
terminals (eg /dev/ttyU*) gracefully, without unneccessary getty restarts
and resulting error messages.
Reviewed by: imp@
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14307
Remove bitfields from defined structures as they are not portable.
Instead use shift and mask macros in the driver and nvmecontrol application.
NVMe is now working on powerpc64 host.
Submitted by: Michal Stanek <mst@semihalf.com>
Obtained from: Semihalf
Reviewed by: imp, wma
Sponsored by: IBM, QCM Technologies
Differential revision: https://reviews.freebsd.org/D13916
Mostly const-correctness fixes. There were also some variable-shadowing,
unused variable, and a couple of sockaddr type-correctness changes. I also had
trouble with cast-align warnings. I was able to prove that one of them was a
false positive. But ultimately I had to disable the warning program-wide to
deal with the others.
Reviewed by: cem
MFC after: 3 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D14460
To minimize the time spent scanning all of the directories in pass 2
(Check Pathnames), fsck uses a search order based on the location
of their first block. Zero length directories have no first block,
so the array being used to hold the block numbers of directory
inodes was of zero length. Thus a lookup was done past the end of
the array getting at best a random value and at worst a segment
fault. For zero length directories, this change allocates a one
element block array and initializes it to zero. The effect is that
all zero length directories are handled first in pass 2.
Reviewed by: brooks
Differential Revision: https://reviews.freebsd.org/D14163
The current route(8) manpage shows that "flush" is an argument to
the optional -n flag, rather than a separate subcommand. Correct
this to properly show flush as a route subcommand.
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Reviewed by: rgrimes
Differential Revision: https://reviews.freebsd.org/D14401
Only require a gateway to be specified on a route add request. On
a route change request that does not specify the gateway, the
gateway will remain the same. This allows changing other route
parameters without having to re-specifying the gateway, like in
"route change 10.0.0.0/8 -mtu 9000".
Update the route(8) manpage to explicitly call out this usage
as being supported.
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Reviewed By: eugen (rtsock.c change), rgrimes
Differential Revision: https://reviews.freebsd.org/D14291
Despite best efforts to regularize, there's a few tables in the system
that still report they are for bus usb when they are really for bus
uhub (where usb devices attach). Add a temporary workaround for this
until these places have been eliminated (likely my fault).
Second, when running verbose, describe what we're doing when
searching. This output can be quite long, but says exactly what's
going on (this output is to stdout, so it's useless for scripting).
Multiple drivers can match on the same USB device and the order of loading
decides which driver gets the device. Use the supplied mask value as an
indication of priority, so that vendor specific device drivers are loaded
before more generic ones.
Sponsored by: Mellanox Technologies
In testing, it's often useful to copy a few files into a directory and
kldxref them to ensure that particular cases are handled correctly.
Add --hints (-h) to facilitate this testing and enable future
automated testing.
Sponsored by: Netflix
'I' was omitting 'zero' values. This is not quite correct, and was put
in as a hack but not documented. Remove it. If we find what the hack
was really needed for, we'll either fix the need for it, or invent a
new flagged value type.
Submitted by: hps@
Sponsored by: Netflix
Implement 'T' field matching. This is needed to prevent false
positives. However, it's not general enough. It only handles one field
and there's a ton of edge cases even with that it likely wouldn't
handle. To do it more generally and also eliminate a lot of the
hackiness that's in this program now, we'd need to creating
directories for lookups ala awk, pearl, python, etc. It appears to be
sufficient, though, to get my keyboard loaded on boot.
Sponsored by: Netflix
Rev 244218 removed the requirement that you provide a dump
directory when checking if there is a coredump ready to be written.
That had the side-effect of causing the bounds file to be read
from the current working directory instead of the dump directory.
As the bounds file is irrelevant when just checking, the simplest
fix is to not read the bounds file when checking.
Reviewed by: markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D14383
select(2) should be declared as restrict. In addition the only fd in
the fdset is open O_RDONLY, and it's not a socket that can provide OOB
notifications,
Reviewed by: ian, imp, vangyzen
This works similarly to the existing gzip compression support, but
zstd is typically faster and gives better compression ratios.
Support for this functionality must be configured by adding ZSTDIO to
one's kernel configuration file. dumpon(8)'s new -Z option is used to
configure zstd compression for kernel dumps. savecore(8) now recognizes
and saves zstd-compressed kernel dumps with a .zst extension.
Submitted by: cem (original version)
Relnotes: yes
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D13101,
https://reviews.freebsd.org/D13633
folks running filesystems created on check-hash enabled kernels
(which I will call "new") on a non-check-hash enabled kernels (which
I will call "old). The idea here is to detect when a filesystem is
run on an old kernel and flag the filesystem so that when it gets
moved back to a new kernel, it will not start getting a slew of
check-hash errors.
Back when the UFS version 2 filesystem was created, it added a file
flag FS_INDEXDIRS that was to be set on any filesystem that kept
some sort of on-disk indexing for directories. The idea was precisely
to solve the issue we have today. Specifically that a newer kernel
that supported indexing would be able to tell that the filesystem
had been run on an older non-indexing kernel and that the indexes
should not be used until they had been rebuilt. Since we have never
implemented on-disk directory indicies, the FS_INDEXDIRS flag is
cleared every time any UFS version 2 filesystem ever created is
mounted for writing.
This commit repurposes the FS_INDEXDIRS flag as the FS_METACKHASH
flag. Thus, the FS_METACKHASH is definitively known to have always
been cleared. The FS_INDEXDIRS flag has been moved to a new block
of flags that will always be cleared starting with this commit
(until they get used to implement some future feature which needs
to detect that the filesystem was mounted on a kernel that predates
the new feature).
If a filesystem with check-hashes enabled is mounted on an old
kernel the FS_METACKHASH flag is cleared. When that filesystem is
mounted on a new kernel it will see that the FS_METACKHASH has been
cleared and clears all of the fs_metackhash flags. To get them
re-enabled the user must run fsck (in interactive mode without the
-y flag) which will ask for each supported check hash whether it
should be rebuilt and enabled. When fsck is run in its default preen
mode, it will just ignore the check hashes so they will remain
disabled.
The kernel has always disabled any check hash functions that it
does not support, so as more types of check hashes are added, we
will get a non-surprising result. Specifically if filesystems get
moved to kernels supporting fewer of the check hashes, those that
are not supported will be disabled. If the filesystem is moved back
to a kernel with more of the check-hashes available and fsck is run
interactively to rebuild them, then their checking will resume.
Otherwise just the smaller subset will be checked.
A side effect of this commit is that filesystems running with
cylinder-group check hashes will stop having them checked until
fsck is run to re-enable them (since none of them currently have
the FS_METACKHASH flag set). So, if you want check hashes enabled
on your filesystems after booting a kernel with these changes, you
need to run fsck to enable them. Any newly created filesystems will
have check hashes enabled. If in doubt as to whether you have check
hashes emabled, run dumpfs and look at the list of enabled flags
at the end of the superblock details.
Most consumers of g_metadata_store were passing in partially unallocated
memory, resulting in stack garbage being written to disk labels. Fix them by
zeroing the memory first.
gvirstor repeated the same mistake, but in the kernel.
Also, glabel's label contained a fixed-size string that wasn't
initialized to zero.
PR: 222077
Reported by: Maxim Khitrov <max@mxcrypt.com>
Reviewed by: cem
MFC after: 3 weeks
X-MFC-With: 323314
X-MFC-With: 323338
Differential Revision: https://reviews.freebsd.org/D14164
