Unmapped mbufs allow sendfile to carry multiple pages of data in a
single mbuf, without mapping those pages. It is a requirement for
Netflix's in-kernel TLS, and provides a 5-10% CPU savings on heavy web
serving workloads when used by sendfile, due to effectively
compressing socket buffers by an order of magnitude, and hence
reducing cache misses.
For this new external mbuf buffer type (EXT_PGS), the ext_buf pointer
now points to a struct mbuf_ext_pgs structure instead of a data
buffer. This structure contains an array of physical addresses (this
reduces cache misses compared to an earlier version that stored an
array of vm_page_t pointers). It also stores additional fields needed
for in-kernel TLS such as the TLS header and trailer data that are
currently unused. To more easily detect these mbufs, the M_NOMAP flag
is set in m_flags in addition to M_EXT.
Various functions like m_copydata() have been updated to safely access
packet contents (using uiomove_fromphys()), to make things like BPF
safe.
NIC drivers advertise support for unmapped mbufs on transmit via a new
IFCAP_NOMAP capability. This capability can be toggled via the new
'nomap' and '-nomap' ifconfig(8) commands. For NIC drivers that only
transmit packet contents via DMA and use bus_dma, adding the
capability to if_capabilities and if_capenable should be all that is
required.
If a NIC does not support unmapped mbufs, they are converted to a
chain of mapped mbufs (using sf_bufs to provide the mapping) in
ip_output or ip6_output. If an unmapped mbuf requires software
checksums, it is also converted to a chain of mapped mbufs before
computing the checksum.
Submitted by: gallatin (earlier version)
Reviewed by: gallatin, hselasky, rrs
Discussed with: ae, kp (firewalls)
Relnotes: yes
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D20616
bectl advertises that it has the ability to create recursive and
non-recursive boot environments. This patch implements that functionality
using the be_create_depth API provided by libbe. With this patch, bectl now
works as bectl(8) describes in regards to creating recursive/non-recursive
boot environments.
Submitted by: Rob Fairbanks <rob.fx907 gmail com> (with minor changes)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D20240
PR/238816 initially addressed updates to usage() however the PR has
morphed into a shopping list of updates to usage() and man pages.
PR: 238816 (I added to the list during discussion)
MFC after: 1 week
Otherwise they are leaked, allowing an attacker to trigger memory
exhaustion.
This is options.c rev. 1.70 from OpenBSD.
admbugs: 552
Obtained from: OpenBSD
MFC after: 3 days
A mixture of IP or UDP packets with valid and invalid checksum could
cause {ip,udp}_packets_bad_checksum to wrap around to 0, resulting
in a division by zero.
This is packet.c rev. 1.27 from OpenBSD.
admbugs: 552
Obtained from: OpenBSD
MFC after: 3 days
Also modify it a bit. Now -c option omits only 'from any to any' part
and works for different protocols (not just for ip).
Reported by: Dmitry Selivanov <dseliv at gmail>
MFC after: 1 week
NANDFS has been broken for years. Remove it. The NAND drivers that
remain are for ancient parts that are no longer relevant. They are
polled, have terrible performance and just for ancient arm
hardware. NAND parts have evolved significantly from this early work
and little to none of it would be relevant should someone need to
update to support raw nand. This code has been off by default for
years and has violated the vnode protocol leading to panics since it
was committed.
Numerous posts to arch@ and other locations have found no actual users
for this software.
Relnotes: Yes
No Objection From: arch@
Differential Revision: https://reviews.freebsd.org/D20745
'-E' appears on the swapon command line, or if "trimonce" appears as
an fstab option.
Discussed at: BSDCAN
Tested by: markj
Reviewed by: markj
Approved by: markj (mentor)
Differential Revision:https://reviews.freebsd.org/D20599
With this opcode it is possible to match TCP packets with specified
MSS option, whose value corresponds to configured in opcode value.
It is allowed to specify single value, range of values, or array of
specific values or ranges. E.g.
# ipfw add deny log tcp from any to any tcpmss 0-500
Reviewed by: melifaro,bcr
Obtained from: Yandex LLC
MFC after: 1 week
Sponsored by: Yandex LLC
Enable write clustering in fusefs whenever cache mode is set to writeback
and the "async" mount option is used. With default values for MAXPHYS,
DFLTPHYS, and the fuse max_write mount parameter, that means sequential
writes will now be written 128KB at a time instead of 64KB.
Also, add a regression test for PR 238565, a panic during unmount that
probably affects UFS, ext2, and msdosfs as well as fusefs.
PR: 238565
Sponsored by: The FreeBSD Foundation
CID 1400451: case 0 is missing a break/return and falling through to the
default case. waitpid(0, ...) makes little sense in the child, we likely
wanted to terminate immediately.
CID 1400453: size argument uses sizeof(char **) instead of sizeof(char *)
and is assigned to a char **; sizeof's match but "this isn't a portable
assumption".
CID: 1400451, 1400453
MFC after: 3 days
command to simplify firewall reloading.
The `missing` option suppresses EEXIST error code, but does check that
existing table has the same parameters as new one. The `or-flush` option
implies `missing` option and additionally does flush for table if it
is already exist.
Submitted by: lev
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D18339
Fixed by r348215, bectl ujail first attempts the trivial fetch of a jid by
passing the first argument to 'ujail' to jail_getid(3) in case a jid/name
have been passed in instead of a BE name. For numerically named BEs, this
was doing the wrong thing: instead of failing to locate the jid specified
and falling back to mountpath search, jail_getid(3) would return the input
as-is.
While here, I've fixed bectl_jail_cleanup which still used a hard-coded pool
name that was overlooked w.r.t. other work that was in-flight around the
same time.
MFC after: 3 days
Add Chacha20 mode to Encrypted Kernel Crash Dumps.
Chacha20 does not require messages to be multiples of block size, so it is
valid to use the cipher on non-block-sized messages without the explicit
padding AES-CBC would require. Therefore, allow use with simultaneous dump
compression. (Continue to disallow use of AES-CBC EKCD with compression.)
dumpon(8) gains a -C cipher flag to select between chacha and aes-cbc.
It defaults to chacha if no -C option is provided. The man page documents this
behavior.
Relnotes: sure
Sponsored by: Dell EMC Isilon
In commit r345845, a portion of documentation for the create subcommand was
removed. Specifically, for creating a snapshot of an existing boot
environment. bectl even has a test-case for this functionality.
Removing the sub-command description was discussed in PR 235850.
This patch brings back the second "create" description that was originally
in place. Albeit, with a few wording/clarifying changes.
Submitted by: Rob Fairbanks <rob.fx907 gmail com>
Reviewed by: kevans
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D20249
found by Coverity. However, upon closer inspection the implementation of
fsck_ffs's fsck_readdir() and dircheck() functions is both nearly impossible
to follow and fails to check / fix directories in several cases. So, this
revision is an entire rewrite of these two functions to clarify what they
are doing and also to get something that works properly.
Referred by: cem
Reviewed by: kib, David G Lawrence
MFC after: 3 days
CID 1401317: namlen may be used uninitialized
ed(4) and ep(4) have been removed. fxp(4) remains popular in older
systems, but isn't as future proof as em(4).
Reviewed by: bz, jhb
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D20311
This change doesn't make any attempt to add support for these slices to the
relevent GEOM classes. Just register the number in fdisk and the canonical
list of kernel macros (diskmbr.h).
Obtained from: DragonFlyBSD (794d80aa519b394b3174f20776a) (small subset of)
Remove the "sync_unmount" and "init_backgrounded" sysctls and the associated
options from mount_fusefs. Add no backwards-compatibility hidden options to
mount_fusefs because these options never had any effect, and are therefore
unlikely to be used.
Sponsored by: The FreeBSD Foundation
Additionally, providing mappings makes the comparison for already loaded
modules a little more strict. This should have been done at initial
introduction, but there was no real reason- however, it proves necessary for
enc which has a standard enc -> if_enc mapping but there also exists an
'enc' module that's actually CAM. The mapping lets us unambiguously
determine the correct module.
Discussed with: ae
MFC after: 4 days
r347241 introduced an ifname <-> kld mapping table, mostly so tun/tap/vmnet
can autoload the correct module on use. It also inadvertently made bogus
some previously valid uses of sizeof().
Revert back to ifkind on the stack for simplicity sake. This reduces the
diff from the previous version of ifmaybeload for easiser auditing.
tun(4) and tap(4) share the same general management interface and have a lot
in common. Bugs exist in tap(4) that have been fixed in tun(4), and
vice-versa. Let's reduce the maintenance requirements by merging them
together and using flags to differentiate between the three interface types
(tun, tap, vmnet).
This fixes a couple of tap(4)/vmnet(4) issues right out of the gate:
- tap devices may no longer be destroyed while they're open [0]
- VIMAGE issues already addressed in tun by kp
[0] emaste had removed an easy-panic-button in r240938 due to devdrn
blocking. A naive glance over this leads me to believe that this isn't quite
complete -- destroy_devl will only block while executing d_* functions, but
doesn't block the device from being destroyed while a process has it open.
The latter is the intent of the condvar in tun, so this is "fixed" (for
certain definitions of the word -- it wasn't really broken in tap, it just
wasn't quite ideal).
ifconfig(8) also grew the ability to map an interface name to a kld, so
that `ifconfig {tun,tap}0` can continue to autoload the correct module, and
`ifconfig vmnet0 create` will now autoload the correct module. This is a
low overhead addition.
(MFC commentary)
This may get MFC'd if many bugs in tun(4)/tap(4) are discovered after this,
and how critical they are. Changes after this are likely easily MFC'd
without taking this merge, but the merge will be easier.
I have no plans to do this MFC as of now.
Reviewed by: bcr (manpages), tuexen (testing, syzkaller/packetdrill)
Input also from: melifaro
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D20044
Allow users to specify multiple dump configurations in a prioritized list.
This enables fallback to secondary device(s) if primary dump fails. E.g.,
one might configure a preference for netdump, but fallback to disk dump as a
second choice if netdump is unavailable.
This change does not list-ify netdump configuration, which is tracked
separately from ordinary disk dumps internally; only one netdump
configuration can be made at a time, for now. It also does not implement
IPv6 netdump.
savecore(8) is already capable of scanning and iterating multiple devices
from /etc/fstab or passed on the command line.
This change doesn't update the rc or loader variables 'dumpdev' in any way;
it can still be set to configure a single dump device, and rc.d/savecore
still uses it as a single device. Only dumpon(8) is updated to be able to
configure the more complicated configurations for now.
As part of revving the ABI, unify netdump and disk dump configuration ioctl
/ structure, and leave room for ipv6 netdump as a future possibility.
Backwards-compatibility ioctls are added to smooth ABI transition,
especially for developers who may not keep kernel and userspace perfectly
synced.
Reviewed by: markj, scottl (earlier version)
Relnotes: maybe
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D19996
directory entries that is caused by uninitialized directory entry
padding written to the disk. It can be viewed by any user with read
access to that directory. Up to 3 bytes of kernel stack are disclosed
per file entry, depending on the the amount of padding the kernel
needs to pad out the entry to a 32 bit boundry. The offset in the
kernel stack that is disclosed is a function of the filename size.
Furthermore, if the user can create files in a directory, this 3
byte window can be expanded 3 bytes at a time to a 254 byte window
with 75% of the data in that window exposed. The additional exposure
is done by removing the entry, creating a new entry with a 4-byte
longer name, extracting 3 more bytes by reading the directory, and
repeating until a 252 byte name is created.
This exploit works in part because the area of the kernel stack
that is being disclosed is in an area that typically doesn't change
that often (perhaps a few times a second on a lightly loaded system),
and these file creates and unlinks themselves don't overwrite the
area of kernel stack being disclosed.
It appears that this bug originated with the creation of the Fast
File System in 4.1b-BSD (Circa 1982, more than 36 years ago!), and
is likely present in every Unix or Unix-like system that uses
UFS/FFS. Amazingly, nobody noticed until now.
This update also adds the -z flag to fsck_ffs to have it scrub
the leaked information in the name padding of existing directories.
It only needs to be run once on each UFS/FFS filesystem after a
patched kernel is installed and running.
Submitted by: David G. Lawrence <dg@dglawrence.com>
Reviewed by: kib
MFC after: 1 week
This change creates an array of port maps indexed by numa domain
for lacp port selection. If we have lacp interfaces in more than
one domain, then we select the egress port by indexing into the
numa port maps and picking a port on the appropriate numa domain.
This is behavior is controlled by the new ifconfig use_numa flag
and net.link.lagg.use_numa sysctl/tunable (both modeled after the
existing use_flowid), which default to enabled.
Reviewed by: bz, hselasky, markj (and scottl, earlier version)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D20060
opcodes when it is needed.
This should fix the problem, when printed by `ipfw show` rule could not
be added due to missing "proto" keyword.
MFC after: 2 weeks
This GRE-in-UDP encapsulation allows the UDP source port field to be
used as an entropy field for load-balancing of GRE traffic in transit
networks. Also most of multiqueue network cards are able distribute
incoming UDP datagrams to different NIC queues, while very little are
able do this for GRE packets.
When an administrator enables UDP encapsulation with command
`ifconfig gre0 udpencap`, the driver creates kernel socket, that binds
to tunnel source address and after udp_set_kernel_tunneling() starts
receiving of all UDP packets destined to 4754 port. Each kernel socket
maintains list of tunnels with different destination addresses. Thus
when several tunnels use the same source address, they all handled by
single socket. The IP[V6]_BINDANY socket option is used to be able bind
socket to source address even if it is not yet available in the system.
This may happen on system boot, when gre(4) interface is created before
source address become available. The encapsulation and sending of packets
is done directly from gre(4) into ip[6]_output() without using sockets.
Reviewed by: eugen
MFC after: 1 month
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D19921
Add the ability to report ATA device power mode with the cmmand 'powermode'
to compliment the existing ability to set it using idle, standby and sleep
commands.
MFC after: 2 weeks
Sponsored by: Multiplay
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
We cannot just assume that any name which ends with a letter is a group
That's not been true since we allowed renaming of network interfaces. It's also
not true for things like epair0a.
Try to retrieve the group members for the name to check, since we'll get ENOENT
if the group doesn't exist.
MFC after: 1 week
Event: Aberdeen hackathon 2019
last allocated block of the file and if that is found, shortens the
file to reference the last allocated block thus avoiding having it
reference a hole at its end.
This update corrects an error where fsck_ffs miscalculated the last
logical block of the file when the file contained a large hole.
Reported by: Jamie Landeg-Jones
Tested by: Peter Holm
MFC after: 2 weeks
Sponsored by: Netflix
SDIO command CMD53 (IO_RW_EXTENDED) allows data transfers using blocks of 1-2048 bytes,
with a maximum of 511 blocks per request.
Extend mmc_data structure to properly describe such requests,
and initialize the new fields in kernel and userland consumers.
No actual driver changes happen yet, these will follow in the separate changes.
Reviewed by: bz
Approved by: imp (mentor)
Differential Revision: https://reviews.freebsd.org/D19779
'be_destroy' can destroy a boot environment (by name) or a given snapshot.
If the target to be destroyed is a dataset, check if it's mounted. We don't
want to check if the origin dataset is mounted when destroying a snapshot.
PR: 236043
Submitted by: Rob Fairbanks <rob.fx907 gmail com>
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D19650
providers mediasize changes.
While here, use GEOM nomenclature to describe providers instead of calling
them device nodes.
Obtained from: Fudo Security
Tested in: AWS
Direct /etc/rc exec was introduced in r337321, with a fallback to
passing it to sh if direct exec fails. "Can't exec" is slightly
misleading in this case (the script is still executed, just not
directly).
HGST was bought by WDC. Over the years, it has sold different drives
branded as HGST, WD or WDC. All of them need the HGST workaround of
sending 4k-sized packets (or multiples of 4k). And the ones that don't
really need this aren't broken by this change. Submitter is the vendor
who has tested these changes on a number of drives. I've simplified it
slightly, since we don't need additional vendors for this at this
time.
Submitted by: JacobBurley via github on behalf of WDC
Pull Request: https://github.com/freebsd/freebsd/pull/391
This makes it more consistent with other filesystems, which all end in "fs",
and more consistent with its mount helper, which is already named
"mount_fusefs".
Reviewed by: cem, rgrimes
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19649
The jail(8) command provides a variety of jail pseudo-parameters that are
useful to consumers of bectl, mount.devfs being the most-often-requested
paramater by bectl users.
command, exec.start, nopersist, and persist may not be specified via -o to
bectl. The command/exec.start remains passed as it always has at the end of
bectl, and persistence is dictated by -b/-U bectl jail arguments.
Submitted by: Wes Maag <jwmaag gmail com>
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D19282
Update NAT64LSN implementation:
o most of data structures and relations were modified to be able support
large number of translation states. Now each supported protocol can
use full ports range. Ports groups now are belongs to IPv4 alias
addresses, not hosts. Each ports group can keep several states chunks.
This is controlled with new `states_chunks` config option. States
chunks allow to have several translation states for single alias address
and port, but for different destination addresses.
o by default all hash tables now use jenkins hash.
o ConcurrencyKit and epoch(9) is used to make NAT64LSN lockless on fast path.
o one NAT64LSN instance now can be used to handle several IPv6 prefixes,
special prefix "::" value should be used for this purpose when instance
is created.
o due to modified internal data structures relations, the socket opcode
that does states listing was changed.
Obtained from: Yandex LLC
MFC after: 1 month
Sponsored by: Yandex LLC
o most of data structures and relations were modified to be able support
large number of translation states. Now each supported protocol can
use full ports range. Ports groups now are belongs to IPv4 alias
addresses, not hosts. Each ports group can keep several states chunks.
This is controlled with new `states_chunks` config option. States
chunks allow to have several translation states for single alias address
and port, but for different destination addresses.
o by default all hash tables now use jenkins hash.
o ConcurrencyKit and epoch(9) is used to make NAT64LSN lockless on fast path.
o one NAT64LSN instance now can be used to handle several IPv6 prefixes,
special prefix "::" value should be used for this purpose when instance
is created.
o due to modified internal data structures relations, the socket opcode
that does states listing was changed.
Obtained from: Yandex LLC
MFC after: 1 month
Sponsored by: Yandex LLC
CLAT is customer-side translator that algorithmically translates 1:1
private IPv4 addresses to global IPv6 addresses, and vice versa.
It is implemented as part of ipfw_nat64 kernel module. When module
is loaded or compiled into the kernel, it registers "nat64clat" external
action. External action named instance can be created using `create`
command and then used in ipfw rules. The create command accepts two
IPv6 prefixes `plat_prefix` and `clat_prefix`. If plat_prefix is ommitted,
IPv6 NAT64 Well-Known prefix 64:ff9b::/96 will be used.
# ipfw nat64clat CLAT create clat_prefix SRC_PFX plat_prefix DST_PFX
# ipfw add nat64clat CLAT ip4 from IPv4_PFX to any out
# ipfw add nat64clat CLAT ip6 from DST_PFX to SRC_PFX in
Obtained from: Yandex LLC
Submitted by: Boris N. Lytochkin
MFC after: 1 month
Relnotes: yes
Sponsored by: Yandex LLC
Add second IPv6 prefix to generic config structure and rename another
fields to conform to RFC6877. Now it contains two prefixes and length:
PLAT is provider-side translator that translates N:1 global IPv6 addresses
to global IPv4 addresses. CLAT is customer-side translator (XLAT) that
algorithmically translates 1:1 IPv4 addresses to global IPv6 addresses.
Use PLAT prefix in stateless (nat64stl) and stateful (nat64lsn)
translators.
Modify nat64_extract_ip4() and nat64_embed_ip4() functions to accept
prefix length and use plat_plen to specify prefix length.
Retire net.inet.ip.fw.nat64_allow_private sysctl variable.
Add NAT64_ALLOW_PRIVATE flag and use "allow_private" config option to
configure this ability separately for each NAT64 instance.
Obtained from: Yandex LLC
MFC after: 1 month
Sponsored by: Yandex LLC
The -l flag sends only the READ CAPACITY (16) sevice action. Normally
we send the READ CAPACITY (10) command, and only send RC16 when the
capacity is larger than 2TB (since that's the max RC10 can
report). However, some badly programmed drives report different
numbers for RC10 and RC16. This can be hard to diagnose, but generally
there's a "Logical block address out of range" error when RC16 reports
a larger number than RC10 and the RC10 number is the correct one. By
comparing the output of readcap with and without the -l argmuent, one
can determine if there's a mismatch and if the DA_Q_NO_RC16 quirk is
needed.
Reviewed by: ken@
Differential Revision: https://reviews.freebsd.org/D19536
All changes are hidden behind the EXPERIMENTAL option and are not compiled
in by default.
Add ND6_IFF_IPV6_ONLY_MANUAL to be able to set the interface into no-IPv4-mode
manually without router advertisement options. This will allow developers to
test software for the appropriate behaviour even on dual-stack networks or
IPv6-Only networks without the option being set in RA messages.
Update ifconfig to allow setting and displaying the flag.
Update the checks for the filters to check for either the automatic or the manual
flag to be set. Add REVARP to the list of filtered IPv4-related protocols and add
an input filter similar to the output filter.
Add a check, when receiving the IPv6-Only RA flag to see if the receiving
interface has any IPv4 configured. If it does, ignore the IPv6-Only flag.
Add a per-VNET global sysctl, which is on by default, to not process the automatic
RA IPv6-Only flag. This way an administrator (if this is compiled in) has control
over the behaviour in case the node still relies on IPv4.
The change removes SIOC[GS]IEEE80211 handling from ifconfig(8)
if WITHOUT_WIRELESS_SUPPORT=yes is set in src.conf(5).
Reviewed by: bz
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D19289
inodes that reference directories. While here tighten the check for
comparing the last logical block with the end of the file.
Reported by: Peter Holm
Tested by: Peter Holm
Sponsored by: Netflix
filesystem block size. When a size is specified with the -S flag
to tunefs(8), round it up to the filesystem block size.
Reported by: Peter Holm
Tested by: Peter Holm
Sponsored by: Netflix
Eliminate trailing whitespace on inet, inet6, and groups lines. I think the
"list txpower" command will still show some, but I'm not able to test that.
PR: 153731
Reported-by: Nikolay Denev <ndenev@gmail.com>
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D19004
shorter than its size resulting in a hole as its final block (which
is a violation of the invarients of the UFS filesystem).
Soft updates will always ensure that the file size is correct when
writing inodes to disk for files that contain only direct block
pointers. However soft updates does not roll back sizes for files
with indirect blocks that it has set to unallocated because their
contents have not yet been written to disk. Hence, the file can
appear to have a hole at its end because the block pointer has been
rolled back to zero when its inode was written to disk. Thus,
fsck_ffs calculates the last allocated block in the file. For files
that extend into indirect blocks, fsck_ffs checks for a size past
the last allocated block of the file and if that is found, shortens
the file to reference the last allocated block thus avoiding having
it reference a hole at its end.
Submitted by: Chuck Silvers <chs@netflix.com>
Tested by: Chuck Silvers <chs@netflix.com>
MFC after: 1 week
Sponsored by: Netflix
A big security advantage of Wayland is not allowing applications to read
input devices all the time. Having /dev/input/* accessible to the user
account subverts this advantage.
libudev-devd was opening the evdev devices to detect their types (mouse,
keyboard, touchpad, etc). This don't work if /dev/input/* is inaccessible.
With the kernel exposing this information as sysctls (kern.evdev.input.*),
we can work w/o /dev/input/* access, preserving the Wayland security model.
Submitted by: Greg V <greg@unrelenting.technology>
Reviewed by: wulf, imp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D18694
MTU if we've set it once and there were no changes on the DHCP server
side since the last refresh. This is consistent I believe with how dhclient
handles other settings like IP address, mask etc.
Approved by: cem, eugen
Differential Revision: https://reviews.freebsd.org/D18546
Move from using a linker set to a constructor function that's
called. This simplifies the code and is slightly more obvious. We now
keep a list of page decoders rather than having an array we managed
before. Commands will move to something similar in the future.
Reviewed by: jhb@
Differential Revision: https://reviews.freebsd.org/D19275
pass of fsck_ffs. Some changes, such as check-hash corrections were
being lost.
Reported by: Michael Tuexen (tuexen@)
Tested by: Michael Tuexen (tuexen@)
MFC after: 3 days
Mentioned in mdconfig(8), malloc-backed md(4) can be unstable unless
required memory is allocated up front with -o reserve. Furthermore, panics
have been observed with md used in fstab on 12.0-RELEASE. Choose the stable
route and pass -o reserve.
Submitted by: Paul Vixie
MFC after: 1 week
Set up zpools with a more unique name, stash the zpool name away in a file pointed
to by `$ZPOOL_NAME_FILE` (which is relative to a per-testcase generated temporary
directory), then remove the file based on `$ZPOOL_NAME_FILE` in the cleanup
routines.
This is a more concurrency-safe solution and will allow the testcases to be safely
executed in parallel.
Reviewed by: kevans, jtl
Approved by: jtl (mentor)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D19024
The logic added in r343287 to avoid false-positive
sum-of-child-bandwidth check errors for HFSC queues has a bug in it
that causes the upperlimit service curve of an HFSC queue to be pulled
down to its parent's linkshare service curve if it happens to be above
it.
Upon further inspection/reflection, this generic
sum-of-child-bandwidths check does not need to be fixed for HFSC - it
needs to be skipped. For HFSC, the equivalent check is to ensure the
sum of child linkshare service curves are at or below the parent's
linkshare service curve, and this check is already being performed by
eval_pfqueue_hfsc().
This commit reverts the affected parts of r343287 and adds new logic
to skip the generic sum-of-child-bandwidths check for HFSC.
MFC after: 1 day
Sponsored by: RG Nets
Differential Revision: https://reviews.freebsd.org/D19124
This code allocated a correctly sized buffer, read past the end of the
source buffer, writing off the end of the target buffer, and then writing
a '\0' terminator past the end of the target buffer (in the wrong place).
It then leaked the buffer.
Switch to a statically sized buffer on the stack and update the source
pointer and
length before use so the correct things are copied.
Fix a logic error in the checks that the format of the line is as
expected and move on out of an assert.
Remove an unneeded close(). fclose() closes the descriptor.
Found with: CheriABI
Obtained from: CheriBSD
Reviewed by: kib, jhb, markj
Differential Revision: https://reviews.freebsd.org/D19122
We can't predict when destruction of origin is needed, and currently we have
a precedent for not prompting for things. Leave the decision up to the user
of bectl(8) if they want the origin snapshot to be destroyed or not.
Emits a warning when -o isn't used and an origin snapshot is left to be
cleaned up, for the time being. This is handy when one drops the -o flag but
really did want to clean up the origin.
A couple of -e ignore's have been sprinkled around the test suite for places
that we don't care that the origin's not been cleaned up. -o functionality
tests will be added in the future, but are omitted for now to reduce
conflicts with work in flight to fix bits of the tests.
Reported by: Shawn Webb
MFC after: 1 week
Setting the length of the request got lost in r343287, which means SIOCGIFGMEMB
gives us the required length, but does not copy the names of the group members.
As a result we don't get a correct list of group members, and 'set skip on
<ifgroup>' broke.
This produced all sorts of very unexpected results, because we would end up
applying 'set skip' to unexpected interfaces.
X-MFC-with: r343287
r343896 made it such that a non-zero exit status was passed through, but was
still wrong if the script exits on a signal. POSIX does not say what the
WEXITSTATUS macro returns in this case and in practice 0 is a common value.
Instead, translate the wait status into 8 bits the same way as the shell
calculates $?.
Reviewed by: kib, Nash Kaminski
MFC after: 1 week
This is also OpenBSD rev. 1.117, as pointed out by
Ryan Moeller <ryan@ixsystems.com>.
Submitted by: Nash Kaminski <nashkaminski@gmail.com>
MFC after: 1 week
Properly pass down is_all to table_show_list(). This restores the behavior
before r272840 so that only 'ipfw table all list' shows the headers.
MFC after: 2 weeks
Relnotes: yes
Use recent best practices for Copyright form at the top of
the license:
1. Remove all the All Rights Reserved clauses on our stuff. Where we
piggybacked others, use a separate line to make things clear.
2. Use "Netflix, Inc." everywhere.
3. Use a single line for the copyright for grep friendliness.
4. Use date ranges in all places for our stuff.
Approved by: Netflix Legal (who gave me the form), adrian@ (pmc files)
For 11n / 11ac we are still using non-11n rates for management and
multicast traffic by default; check 'MCS rate' bit to determine how
to print them correctly.
PR: 161035
MFC after: 1 week
The KPI have been reviewed and cleansed of features that were planned
back 20 years ago and never implemented. The pfil(9) internals have
been made opaque to protocols with only returned types and function
declarations exposed. The KPI is made more strict, but at the same time
more extensible, as kernel uses same command structures that userland
ioctl uses.
In nutshell [KA]PI is about declaring filtering points, declaring
filters and linking and unlinking them together.
New [KA]PI makes it possible to reconfigure pfil(9) configuration:
change order of hooks, rehook filter from one filtering point to a
different one, disconnect a hook on output leaving it on input only,
prepend/append a filter to existing list of filters.
Now it possible for a single packet filter to provide multiple rulesets
that may be linked to different points. Think of per-interface ACLs in
Cisco or Juniper. None of existing packet filters yet support that,
however limited usage is already possible, e.g. default ruleset can
be moved to single interface, as soon as interface would pride their
filtering points.
Another future feature is possiblity to create pfil heads, that provide
not an mbuf pointer but just a memory pointer with length. That would
allow filtering at very early stages of a packet lifecycle, e.g. when
packet has just been received by a NIC and no mbuf was yet allocated.
Differential Revision: https://reviews.freebsd.org/D18951
This is a wild guess as to why bectl tests failed once upon a time in CI,
given no apparent way to see a transcript of cleanup routines with Kyua. The
bectl tests construct a new, clean zpool for every test. The failure
indicated was because of a mount that was leftover from a previous test, but
the previous test had succeeded so it's not clear how the mount remained
leftover unless the `zpool get health ${pool}` had somehow failed.
MFC after: 1 week
When performing a non-status operation on a single interface, it is
not necessary for ifconfig to build a list of all addresses in the
system, sort them, then iterate through them looking for the entry for
the single interface of interest. Doing so becomes increasingly
expensive as the number of interfaces in the system grows (e.g., in a
system with 1000+ vlan(4) interfaces).
Reviewed by: ae, kp
MFC after: 1 week
Sponsored by: RG Nets
Differential Revision: https://reviews.freebsd.org/D18919
The kernel will reject very large tables to avoid resource exhaustion
attacks. Some users run into this limit with legitimate table
configurations.
The error message in this case was not very clear:
pf.conf:1: cannot define table nets: Invalid argument
pfctl: Syntax error in config file: pf rules not loaded
If a table definition fails we now check the request_maxcount sysctl,
and if we've tried to create more than that point the user at
net.pf.request_maxcount:
pf.conf:1: cannot define table nets: too many elements.
Consider increasing net.pf.request_maxcount.
pfctl: Syntax error in config file: pf rules not loaded
PR: 235076
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D18909
to make it consistent with newfs. Document the legality of '_'
in label names in both tunefs(8) and newfs(8).
PR: 235182
Submitted by: darius@dons.net.au
Reviewed by: Conrad Meyer
MFC after: 3 days
Sponsored by: Netflix
The number of syscalls made during parsing of any config that
defines tables is also reduced, and incorrect warnings that HFSC
parent queue bandwidths were smaller than the sum of their child
bandwidths have been fixed.
Reviewed by: kp
MFC after: 1 week
Sponsored by: RG Nets
Differential Revision: https://reviews.freebsd.org/D18759
Do not invoke 'wlan_up' function from devd(8) on interface
creation event (an example to create such event:
'ifconfig wlan0 create wlandev rtwn0');
they're typically produced during 'service netif (re)start'
and result in duplicate interface initialization.
From the user side if WPA option is used, this result in messages like:
- /etc/rc.d/wpa_supplicant: WARNING: failed to start wpa_supplicant
or
- wpa_supplicant already running? (pid=xxxx).
(for HOSTAP interfaces this race may result in startup failure).
As a side effect, wpa_supplicant(8) / hostapd(8) will not be
invoked when new wlan(4) interface is created manually and
corresponding configuration for it is present in rc.conf(5).
This change does not affect device attach / removal events.
MFC after: 5 days
When we skip on a group the kernel will automatically skip on the member
interfaces. We still need to update our own cache though, or we risk
overruling the kernel afterwards.
This manifested as 'set skip' working initially, then not working when
the rules were reloaded.
PR: 229241
MFC after: 1 week
This set of changes is geared towards making bectl respect deep boot
environments when they exist and are mounted. The deep BE composition
functionality (`bectl add`) remains disabled for the time being. This set of
changes has no effect for the average user. but allows deep BE users to
upgrade properly with their current setup.
libbe(3): Open the target boot environment and get a zfs handle, then pass
that with the target mountpoint to be_mount_iter; If the BE_MNT_DEEP flag is
set call zfs_iter_filesystems and mount the child datasets.
Similar logic is employed when unmounting the datasets, save for children
are unmounted first.
bectl(8): Change bectl_cmd_jail to pass the BE_MNT_DEEP flag when
calling be_mount as well as call be_unmount when cleaning up after the
jail has exited instead of umount(2) directly.
PR: 234795
Submitted by: Wes Maag <jwmaag_gmail.com> (test additions by kevans)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D18796
Try to reword -prefixlen section to more clearly and accurately describe how
the -prefixlen modifier works.
While here, fix a word that igor considered a typo: aggregatable addresses is a
valid technical term per RFC-2374, however, it was superseded by the term
"aggregator" in RFC-3587.
MFC after: 1 week
Reviewed by: 0mp, crees
Approved by: emaste (mentor)
Differential Revision: https://reviews.freebsd.org/D10087
These programs parse ND6 Router Advertisement messages; rtsold(8) has
required an SA, SA-14:20.rtsold, for a bug in this code. Thus, they
are good candidates for sandboxing.
The approach taken is to run the main executable in capability mode
and use Casper services to provide functionality that cannot be
implemented within the sandbox. In particular, several custom services
were required.
- A Casper service is used to send Router Solicitation messages on a
raw ICMP6 socket. Initially I took the approach of creating a
socket for each interface upon startup, and connect(2)ing it to
the all-routers multicast group for the interface. This permits
the use of sendmsg(2) in capability mode, but only works if the
interface's link is up when rtsol(d) starts. So, instead, the
rtsold.sendmsg service is used to transmit RS messages on behalf
of the main process. One could alternately define a service
which simply creates and connects a socket for each destination
address, and returns the socket to the sandboxed process. However,
to implement rtsold's -m option we also need to read the ND6 default
router list, and this cannot be done in capability mode.
- rtsold may execute resolvconf(8) in response to RDNSS and DNSSL
options in received RA messages. A Casper service is used to
fork and exec resolvconf(8), and to reap the child process.
- A service is used to determine whether a given interface's
link-local address is useable (i.e., not duplicated or undergoing
DAD). This information is supplied by getifaddrs(3), which reads
a sysctl not available in capability mode. The SIOCGIFCONF socket
ioctl provides equivalent information and can be used in capability
mode, but I decided against it for now because of some limitations
of that interface.
In addition to these new services, cap_syslog(3) is used to send
messages to syslogd.
Reviewed by: oshogbo
Tested by: bz (previous versions)
MFC after: 2 months
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17572
This follows the example of other Capsicumized programs in /sbin.
Reported by: Manfred Antar <manfredantar@gmail.com>
MFC with: r342699
Sponsored by: The FreeBSD Foundation
- Use cap_fileargs(3) to open dump devices after entering capability
mode, and use cap_syslog(3) to log messages.
- Use a relative directory fd to open output files.
- Use zdopen(3) to compress kernel dumps in capability mode.
Reviewed by: cem, oshogbo
MFC after: 2 months
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18458
By default, bectl is setting the jail 'name' parameter to the boot
environment name, which causes an error when the boot environment name is
not a valid jail name. With the attached fix, when no name is supplied, the
default jail name will be the jail id - this is is the same behavior as the
jail command.
Additionally, this commit addresses two other bugs that prevented unjailing
in scenarios where the jail name does not match the boot environment name:
1. In 'bectl_locate_jail', 'mountpoint' is used to resolve the boot
environment path, but really 'mounted' should be used. 'mountpoint' is the
path where the zfs dataset will be mounted. 'mounted' is the path where
the dataset is actually mounted.
2. in 'bectl_search_jail_paths', 'jail_getv' would fail after the first
call. Which is fine, if the boot environment you're unjailing is the next
one up. According to 'man jail_getv', it's expecting name and value
strings. 'jail_getv' is being passed an integer for the lastjid, so amend
that to use a string instead.
Test cases have been amended to reflect the bugs found.
PR: 233637
Submitted by: Rob <rob.fx907_gmail.com>
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D18607
The nvmecontrol code that did the devlist assumed that we had a
tightly-packed allocation of units. Since pci writing exists, this
isn't the case. Loop over the first 256 units, which is a reasonable
number of possible units.
Sponsored by: Netflix
