Arka Sharma [Fri, 18 Feb 2022 15:34:15 +0000 (09:34 -0600)]
mmap map_at_zero test: handle W^X
Use kern.elfXX.allow_wx to decide whether to map W+X or W-only memory.
Future work could expand this test to add an "allow_wx" axis to the
test matrix, but I would argue that a separate test should be written,
since that's orthogonal to map_at_zero.
Randall Stewart [Mon, 21 Feb 2022 11:30:17 +0000 (06:30 -0500)]
tcp: Congestion control move to using reference counting.
In the transport call on 12/3 Gleb asked to move the CC modules towards
using reference counting to prevent folks from unloading a module in use.
It was also agreed that Michael would do a user space utility like tcp_drop
that could be used to move all connections that are using a specific CC
to some other CC.
This is the half I committed to doing, making it so that we maintain a refcount
on a cc module every time a pcb refers to it and decrementing that every
time a pcb no longer uses a cc module. This also helps us simplify the
whole unloading process by getting rid of tcp_ccunload() which munged
through all the tcb's. Instead we mark a module as being removed and
prevent further references to it. We also make sure that if a module is
marked as being removed it cannot be made as the default and also
the opposite of that, if its a default it fails and does not mark it as being
removed.
Reviewed by: Michael Tuexen, Gleb Smirnoff
Sponsored by: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D33249
The IBTA specification has new speed - NDR. That speed supports signaling
rate of 100Gb. mlx5 IB driver translates link modes reported by ConnectX
device to IB speed and width. Added translation of new 100Gb, 200Gb and
400Gb link modes to NDR IB type and width of x1, x2 or x4 respectively.
Stefan Eßer [Sun, 20 Feb 2022 21:07:35 +0000 (22:07 +0100)]
dev/pci: fix potential panic due to bogus VPD data
A panic has been observed on a system with a Intel X520 dual LAN
device. The panic is caused by a KASSERT() noticing that the amount
of VPD data copied out to the pciconf command does not match the
amount of data read from the device.
The cause of the size mismatch was VPD data that started with 0x82,
the VPD tag that indicates that a VPD ident follows, but with a length
of more than 255 characters, which happens to be the maximum ident
size supported by the API between kernel and the pciconf program.
The data provided did not resemble an actual VPD identifier, and it
can be assumed that the initial tag value 0x82 happens to be there
by accident.
An ident size of 255 far exceeds the sensible length of that data
element, which is in the order of at most 30 to 40 bytes.
This patch adds several consitstency checks to the VPD parser, the
most critical being that ident lengths of more than 255 bytes are
rejected. Other checks reject VPD with more than one ident tag or
with an empty (zero length) ident string.
This patch prevents the panic that occured when "pciconf -lV" was
executed on the affected system.
During the anaylsis of the issue and the VPD code it has been
found that the VPD parser uses a state machine that accepts tags
in any order and combination. This is a bad match for the actual
VPD data, which has a very simple structure that can be parsed
with a non-recursive direct descent parser (which always knows
exactly which token to expect next).
A review fpr a much simpler VPD parser that performs many more
consistency checks and rejects invalid VPD has been proposed in
review https://reviews.freebsd.org/D34268.
Reported by: mikej at paymentallianceintl.com (Michael Jung)
Approved by: jhb
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D34255
Kirk McKusick [Sun, 20 Feb 2022 21:18:05 +0000 (13:18 -0800)]
Avoid unaligned writes by fsck_ffs(8).
Normally fsck_ffs never does reads or writes that are not aligned
to the size of one of the checked filesystems fragments. The one
exception is when it finds that it needs to write the superblock
recovery information. Here it will write with the alignment reported
by the underlying disk as its sector size as reported by an
ioctl(diskfd, DIOCGSECTORSIZE, &secsize).
Modern disks have a sector size of 4096, but for backward compatibility
with older disks will report that they have a sector size of 512.
When presented with a 512 byte write, they have to read the associated
4096 byte sector, replace the 512 bytes to be written, and write
the updated 4096 byte sector back to the disk. Unfortunately, some
disks report that they have 512 sectors, but fail writes that are not
aligned to 4096 boundaries and are a multiple of 4096 bytes in size.
This commit updates fsck_ffs(8) so that it uses the filesystem fragment
size as the smallest size and alignment for doing writes rather than
the disk's reported sector size.
Stefan Eßer [Sun, 20 Feb 2022 14:24:43 +0000 (15:24 +0100)]
fetch: make -S argument accept values > 2GB
Use strtoll() to parse the argument of the -S option.
FreeBSD has supported 64 bit file offsets for more than 25 years on
all architectures and off_t is a 64 bit integer type for that reason.
While strtol() returns a 64 bit value on 64 LP64 architectures, it
is limit to 32 bit on e.g. i386. The strtoll() function returns a 64
but result on all supported architectures and therefore supports the
possible file lengths and file offsets on 32 bit archtectures.
Michal Meloun [Sun, 20 Feb 2022 09:45:14 +0000 (10:45 +0100)]
ofw_iicbus: Add method for manual setting of basic OFW parameters.
Some IIC multifunction devices may have multiple I2C addresses per chip, but
only the primary address is listed in the DT (e.g. MAX776200). In this case,
the sub-devices for the secondary addresses must be created manually with
fixed OFW parameters (node, name, compatibility string, IIC address).
Add a bus method to the ofw_iicbus interface that does this.
Kirk McKusick [Sun, 20 Feb 2022 05:30:37 +0000 (21:30 -0800)]
Provide an interface that allows GEOM modules to return multiple messages.
The gctl_error() function provides GEOM modules with the ability
to report only a single message. When running with the verbose
flag, commands that handle multiple devices may want to report a
message for each of the devices on which it operates. This commit
adds the gctl_msg() function that can be called multiple times
to post messages. When finished issuing messages, the application
must either call gctl_post_messages() or call gctl_error() to cause
the messages to be reported to the calling process.
John Baldwin [Fri, 18 Feb 2022 23:20:14 +0000 (15:20 -0800)]
ctl ramdisk: Free compare buffer after a compare I/O request.
For a compare request, the ramdisk backend allocates a temporary
buffer to hold the I/O data and then compares it against the LUN's
pages in ctl_backend_ramdisk_cmp after the data has been filled.
However, the tempory buffer was leaked when after the comparison was
complete. Fix this by freeing the buffer after the comparison.
Navdeep Parhar [Fri, 4 Feb 2022 21:16:35 +0000 (13:16 -0800)]
cxgbe(4): Changes to the fatal error handler.
* New error_flags that can be used from the error ithread and elsewhere
without a synch_op.
* Stop the adapter immediately in t4_fatal_err but defer most of the
rest of the handling to a task. The task is allowed to sleep, unlike
the ithread. Remove async_event_task as it is no longer needed.
* Dump the devlog, CIMLA, and PCIE_FW exactly once on any fatal error
involving the firmware or the CIM block. While here, dump some
additional info (see dump_cim_regs) for these errors.
* If both reset_on_fatal_err and panic_on_fatal_err are set then attempt
a reset first and do not panic the system if it is successful.
Tom Jones [Fri, 18 Feb 2022 15:21:23 +0000 (15:21 +0000)]
diff: fix failed compare when ignoring file case
With --ignore-file-name-case we need to compare files regardless of
case. We need to propigate both names down to diffit so we can look up
the correct file when the names differ based on case, otherwise we try
to look up the file using the case from the a tree which might not be
discoverable if its case is different in the b tree.
Reviewed by: bapt
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D34201
Tom Jones [Fri, 18 Feb 2022 15:07:52 +0000 (15:07 +0000)]
diff: Detect Objective-C methods
When searching back for function definitions, consider lines starting
with '+' and '-', this allows us to pick up Objective-C methods as well
as C style function definitions.
Reviewed by: bapt
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D34202
Colin Percival [Thu, 17 Feb 2022 21:01:11 +0000 (13:01 -0800)]
Add support for getting early entropy from UEFI
UEFI provides a protocol for accessing randomness. This is a good way
to gather early entropy, especially when there's no driver for the RNG
on the platform (as is the case on the Marvell Armada8k (MACCHIATObin)
for now).
If the entropy_efi_seed option is enabled in loader.conf (default: YES)
obtain 2048 bytes of entropy from UEFI and pass is to the kernel as a
"module" of name "efi_rng_seed" and type "boot_entropy_platform"; if
present, ingest it into the kernel RNG.
Eric van Gyzen [Thu, 17 Feb 2022 15:53:48 +0000 (09:53 -0600)]
elfdump: handle small files more gracefully
elfdump -E on an empty file would complain "Invalid argument" because
it tried to mmap zero bytes. With the -E flag, elfdump should
simply exit non-zero. For tiny files, the code would reference off
the end of the mapped region.
Ensure the file is large enough to contain an ELF header before mapping it.
Bjoern A. Zeeb [Fri, 1 Oct 2021 10:51:50 +0000 (10:51 +0000)]
LinuxKPI: implement dma_sync_single_for_*, apply to (un)map single/sg
Implement dma_sync_single_for_{cpu,device} translating the Linux
DMA_ flags to BUS_DMASYNC_ combinations. Make map_single/unmap_single*
functions call the respective sync function. Apply the same logic to
the scatter-gather list map/unmap functions.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D32255
Use the send tag refcounting mechanism to refcount the RX- and TX- TLS
send tags. Then it is no longer needed to wait for refcounts to reach
zero when destroying RX- and TX- TLS send tags as a result of pending
data or WQE commands.
This also ensures that when TX-TLS and rate limiting is used at the same
time, the underlying SQ is not prematurely destroyed.
- Do not set Os to FreeBSD explicitly. We don't do it in other manual
pages.
- Remove macros from the -width specifier.
- Use Xr instead of Cm to refer to the freebsd-update command.
- Address some mandoc lint warnings and use \(em instead of --.
- Wordsmith some paragraphs.
- Add a missing El macro.
Emmanuel Vadot [Wed, 16 Feb 2022 10:26:14 +0000 (11:26 +0100)]
linuxkpi: Add mmap_lock.h
This contain mmap_read_lock, mmap_read_unlock and mmap_write_lock_killable
which are abstraction around down_read, up_read and down_write_killable.
Note that in Linux 5.8 mmap_sem was renamed to mmap_lock.
We might want to do the same at some point but some drivers still uses
the old mmap locking API.
Bjoern A. Zeeb [Thu, 17 Feb 2022 00:58:12 +0000 (00:58 +0000)]
LinuxKPI: 802.11 simplify beacon checks in rx path
In linuxkpi_ieee80211_rx() check if the frame is a beacon once upfront
and use the result for enhanced debugging and further checks.
This was done intially for rx_status->device_timestamp debugging.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Bjoern A. Zeeb [Thu, 17 Feb 2022 00:15:56 +0000 (00:15 +0000)]
LinuxKPI: 802.11 advertise full offload scanning based on hw_scan only
We disabled hw_scan for drivers not advertising SINGLE_SCAN_ON_ALL_BANDS.
Do not depend on this hw flag to set IEEE80211_FEXT_SCAN_OFFLOAD for
net80211 as otherwise scanning will never work.
Long-term we probably want to re-think how we do/integrate hw_scan
better in net80211.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Bjoern A. Zeeb [Wed, 16 Feb 2022 23:57:27 +0000 (23:57 +0000)]
LinuxKPI: 802.11: disable ic_headroom for the moment
There is a problem with some drivers, such as rtw88, asking for more
headroom than we currently can handle throughout the stack (we have
other legacy wireless driver in the tree with similar problems).
This may trigger an assertion in the TCP syncache where we are checking
for a reply to fit in MHLEN.
While for the moment we still copy data from mbufs to skbs,
we can simply disable the extra headroom request in ic_headroom and
deal with it ourselves (which we already did anyway).
Leave a link to the thread on freebsd-transport detailing more of the
problem so we can find it again and solve it here or there.
Ed Maste [Wed, 16 Feb 2022 21:10:45 +0000 (16:10 -0500)]
Clean up warnings in pthread tests
I intend to move these into lib/libthr/tests/ and connect to kyua. This
is a first step to address warnings emitted when building using standard
make infrastructure.
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D34306
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