Offsets greater than 255 bytes reside on page1 of the SPD device.
Accessing them requires switching to page1, and adjusting the absolute
offset to be relative to the start of page1. After the access, the page
must be set back to page0. These operations are performed in several
places, so break them out into their own functions.
Also, replace a pair of default cases, which should be impossible due to
earlier checks, with __assert_unreachable().
Reviewed by: imp
MFC after: 1 week
Sponsored by: Panasas
Differential Revision: https://reviews.freebsd.org/D39842
DDR3 and DDR4 encode the week and year that the DIMM was manufactured,
as a pair of two-digit binary-coded decimal values. Read the values, and
report them as (uint8_t)s.
Reviewed by: imp, jhb
MFC after: 1 week
Sponsored by: Panasas
Differential Revision: https://reviews.freebsd.org/D39795
The hardware supported by mfi(4) and mrsas(4) use the same dcmd's.
mfiutil(8) in theory could run on controlled attached to mrsas(4).
It can't since mrsas(4) doesn't have support for the FreeBSD mfi(4)
ioctl. Porting the ioctl from mfi(4) to mrsas(4) would be the first
step in making mrsasutil(8) which is an additional name for mfiutil(8)
but opens /dev/mrsasX instead of /dev/mfiX
PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265794
Reviewed by: jhb
Differential revision: https://reviews.freebsd.org/D36342
Tested by: Dan Mahoney <freebsd@gushi.org>
Otherwise POSTREAD syncs may re-invalidate the shadow of the data buffer
when copying from bounce pages, resulting in false-positive KMSAN
reports.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Replacing rtsock with netlink also means providing similar tracing facilities,
rtsock provides `route -n monitor` interface, where each message can be traced
to the originating PID.
This diff closes the feature gap between rtsock and netlink in that regard.
Netlink works slightly differently from rtsock, as it is a generic message
"broker". It calls some kernel KPIs and returns the result to the caller.
Other Netlink consumers gets notified on the changed kernel state using the
relevant subsystem callbacks. Typically, it is close to impossible to pass
some data through these KPIs to enhance the notification.
This diff approaches the problem by using osd(9) to assign the relevant
socket pointer (`'nlp`) to the per-socket taskqueue execution thread.
This change allows to recover the pointer in the aforementioned notification
callbacks and extract some additional data.
Using `osd(9)` (and adding additional metadata) to the notification receiver
comes with some additional cost attached, so this interface needs to be
enabled explicitly by using a newly-created `NETLINK_MSG_INFO` `SOL_NETLINK`
socket option.
The actual medatadata (which includes the originator PID) is provided via
control messages. To enable extensibility, the control message data is
encoded in the standard netlink(TLV-based) fashion. The list of the
currently-provided properties can be found in `nlmsginfo_attrs`.
snl(3) is extended to enable decoding of netlink messages with metadata
(`snl_read_message_dbg()` stores the parsed structure in the provided buffer).
Differential Revision: https://reviews.freebsd.org/D39391
The two main uses of dev_t are in struct stat and as a parameter of the
mknod system calls.
As of version 2.6.0 of the Linux kernel, dev_t is a 32-bit quantity
with 12 bits set asaid for the major number and 20 for the minor number.
The in-kernel dev_t encoded as MMMmmmmm, where M is a hex digit of the
major number and m is a hex digit of the minor number.
The user-space dev_t encoded as mmmM MMmm, where M and m is the major
and minor numbers accordingly. This is downward compatible with legacy
systems where dev_t is 16 bits wide, encoded as MMmm.
In glibc dev_t is a 64-bit quantity, with 32-bit major and minor numbers,
encoded as MMMM Mmmm mmmM MMmm. This is downward compatible with the Linux
kernel and with legacy systems where dev_t is 16 bits wide.
In the FreeBSD dev_t is a 64-bit quantity. The major and minor numbers
are encoded as MMMmmmMm, therefore conversion of the device numbers between
Linux user-space and FreeBSD kernel required.
In between kern_fstat() and translate_fd_major_minor(), another process
having the same filedesc could modify or close fd.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D39763
Get rid of calling Linux stat translation hook and specific to Linux
handling of non-vnode dirfd from kern_statat(),
Reviewed by: kib, mjg
Differential revision: https://reviews.freebsd.org/D35474
As of version 2.6.0 of the Linux kernel, dev_t is a 32-bit unsigned integer
on all platforms. Prior the 2.6 kernel dev_t type was an unsigned short.
However, since the firs commit of the Linuxulator, mknod syscall get int dev
argument.
Also, there is some confusion here, while the kernel declares a dev_t type
as a 32-bit sized, the user-space dev_t type can be size of 64 bits, e.g.,
in the Glibc library.
To avoid confusion and to help porting of the Linuxulator to other platforms
use explicit l_dev_t for dev argument of mknod syscalls.
Just for future changes of the conditional Linuxulator build. We need
a small refactoring of the MI code to help porting Linuxulator to other
platforms.
Fix vfs_emptydir(). It would consider directories containing directories
with name of the form 'X.' (X being any authorized byte) as empty. Also,
it would cause VOP_READDIR() to return an error on directories
containing enough whiteouts. While here, use a more decently sized
buffer as done elsewhere.
Remove ad-hoc iteration on the directory's content and instead use the
newly exported vn_dir_next_dirent() function (this is what fixes the
second problem mentioned above).
PR: 270988
Reviewed by: kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D39775
Simplify the old interface (one less argument, simpler termination test)
and add documentation about it. Add more sanity checks (mostly under
INVARIANTS, but also in the general case to prevent infinite
loops). Drop the explicit test on minimum directory entry size (without
INVARIANTS).
Deal with the impacts in callers (dirent_exists() and vop_stdvptocnp()).
dirent_exists() has been simplified a bit, preserving the exact same
semantics but for the return code whose meaning has been reversed (0 now
means the entry exists, ENOENT that it doesn't and other values are
genuine errors). While here, suppress gratuitous casts of malloc return
values.
vn_dir_next_dirent() has been tested by a 'make -j4 buildkernel' with a
temporary modification to the VFS cache causing vn_vptocnp() to always
call VOP_VPTOCNP() and finally vop_stdvptocnp() (observed with temporary
debug counters).
Export new _GENERIC_MINDIRSIZ and _GENERIC_MAXDIRSIZ on __BSD_VISIBLE,
and GENERIC_MINDIRSIZ and GENERIC_MAXDIRSIZ on _KERNEL.
Reviewed by: kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D39764
Move internal-to-'vfs_default.c' get_next_dirent() to 'vfs_vnops.c' and
export it for use by other parts of the VFS. This is a preparatory
change for using it in vfs_emptydir().
No functional change.
Reviewed by: kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D39755
Otherwise KMSAN only detects uninitialized memory when the contents of
the buffer are copied out to userspace or transmitted to a network
interface. At that point the KMSAN violation will be far removed from
its origin, so let's try to make debugging such problems a bit easier.
Reviewed by: glebius
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D38101
The x18 register isn't useable within FreeBSD kernel space, so we
have to fix the BLAKE3 aarch64 assembly for not using it.
The source files are here: https://github.com/mcmilk/BLAKE3-tests
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de>
Closes#14728
This was needed before INTRNG was in place and handling the push of
curthread->td_intr_frame. Since INTRNG now handles this, there is no
longer and need for playing around with the frame inside IPI interrupts.
This was needed when intr_ipi_dispatch() was called by hardware-specific
IPI interrupt routines which didn't save the trap frame. Now all ARM
interrupts pass through INTRNG which will have already saved the trap
frame and disabled preemption.
Remove the conditional trapframe/argument passing to the handlers.
Reviewed by: andrew
Differential Revision: https://reviews.freebsd.org/D37938
This cherry-picks upstream:
commit bba7cbf0a4
Author: Alexander Motin <mav@FreeBSD.org>
Date: Wed Apr 26 12:20:43 2023 -0400
Fix positive ABD size assertion in abd_verify().
Gang ABDs without childred are legal, and they do have zero size.
For other ABD types zero size doesn't have much sense and likely
not working correctly now.
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14795
Sponsored by: Rubicon Communications, LLC ("Netgate")
RFC 4620 is an experimental RFC that can be used to request information
about a host, including:
- the fully-qualified or single-component name
- some set of the Responder's IPv6 unicast addresses
- some set of the Responder's IPv4 unicast addresses
This is not something that should be made available by default.
PR: 257709
Submitted by: ruben@verweg.com
Reviewed by: melifaro
Relnotes: Yes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D39778
This is part one of a fix for booting with ZFS on arm64 using
accelerated checksum implementations. Checksum benchmarking will
attempt to use the FPU, so we currently panic quickly on boot. BLAKE3
is still broken, as it clobbers x18 and we promptly discover that fact
as soon as we attempt to fetch curthread in kfpu_end().
Note that _STANDALONE is special-cased here, but ideally we wouldn't be
building the code that uses kfpu_begin()/kfpu_end() at all in the loader
environment.
Discussed with: imp (a bit)
Differential Revision: https://reviews.freebsd.org/D39448
Similar to the PF_TAG_DUMMYNET we must also clear the route tag if
dummynet didn't keep the packet. In that case we'd continue immediately
and there'd be no need for the route tag. Keeping it could lead to
unexpected routing of traffic.
See also: 27407a6adc
See also: https://redmine.pfsense.org/issues/14055
Sponsored by: Rubicon Communications, LLC ("Netgate")
This eliminates some static bloat in amd64 kernels and reduces the
penalty of increasing MAXCPU. The structures now also maintain NUMA
affinity. No functional change intended.
PR: 269572
Reviewed by: mjg, kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D39807
This avoids bloating the BSS when MAXCPU is large.
No functional change intended.
PR: 269572
Reviewed by: corvink, rew
Tested by: rew
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D39805
