The code was incrementing a global variable in an unsafe manner.
Two different threads stating two different sockets could have resulted
in the same inode numbers assigned to both.
Creation is protected with a global lock, move the assigment there.
Since inode numbers are 64-bit now drop the check for overflows.
Sponsored by: The FreeBSD Foundation
Processes stay in the hash until they get reaped.
This code does not unlink the child from the parent, so remove
the claim that it does.
Sponsored by: The FreeBSD Foundation
is that both file name and current directory is recorded, however
file name sometimes already contains absolute path. In which case
prefixing it with directory name results in an invalid pathname.
Only append directory name if the file name does not start with '/'.
This seems to DTRT.
Approved by: emaste
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D18290
forks, exits and waits are frequently stalled during poudriere -j 128 runs
due to killpg and process list exports performed for each package.
Both uses take the allproc lock. The latter case can be modified to iterate
over the hash with finer grained locking instead.
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17817
There are two locations where an always true comparison was made in
a KASSERT. Replace this by an appropriate check and use a consistent
panic message. Also use this code when checking a similar condition.
PR: 229664
Reviewed by: rrs@
MFC after: 1 week
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D18021
It was reported, and I easily reproduced it, that this change triggers panic
when receiving replication stream with enabled embedded blocks, when short
file compressing into one embedded block changes its block size. I am not
sure that the problem is in this particuler patch, not just triggered by it,
but since investigation and fix will take some time, I've decided to revert
this for now.
PR: 198457, 233277
kn_status is protected by the kqueue's lock, but we were updating it
without the kqueue lock held. For EVFILT_TIMER knotes, there is no
knlist lock, so the knote activation could occur during the kn_status
update and result in KN_QUEUED being lost, in which case we'd enqueue
an already-enqueued knote, corrupting the queue.
Fix the problem by setting or clearing KN_DISABLED before dropping the
kqueue lock to call into the filter. KN_DISABLED is used only by the
core kevent code, so there is no side effect from setting it earlier.
Reported and tested by: Sylvain GALLIANO <sg@efficientip.com>
Reviewed by: kib
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18060
It is a write-only flag whose last use was removed in r302235.
No functional change intended.
Reviewed by: kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18059
This is similar to taskqueue_drain_all(9) but will wait for the queue
to become idle before returning instead of only waiting for
already-enqueued tasks to finish. This will be used in the opensolaris
compat layer.
PR: 227784
Reviewed by: cem
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17975
The FBT fuction boundary prober was setting one return probe marker value,
but the dtrace handler was expecting another. This causes a hang when
tracing return probes.
Some WITH_/WITHOUT_ defaults will likey change in the future (e.g. as we
migrate to copyfree base system components).
Add non-default descriptions for the benefit of WIP branches.
Those two manual pages are already referencing each other in the HISTORY
sections, which people might skip. Mention those manual pages explicitly in
the SEE ALSO sections. Also, remove a reference to be(1) from libbe(3).
Reviewed by: bcr
Approved by: krion (mentor, implicit), mat (mentor, implicit)
Differential Revision: https://reviews.freebsd.org/D18136
As requested by a TODO in the source code.
Reviewed by: bcr
Approved by: krion (mentor, implicit), mat (mentor, implicit)
Differential Revision: https://reviews.freebsd.org/D18063
According to markj@:
pageproc contains the page daemon and laundry threads, which are
responsible for managing the LRU page queues and writing back dirty
pages. vmproc's main task is to swap out kernel stacks when the system
is under memory pressure, and swap them back in when necessary. It's a
somewhat legacy component of the system and isn't required. You can
build a kernel without it by specifying "options NO_SWAPPING" (which is
a somewhat misleading name), in which vm_swapout_dummy.c is compiled
instead of vm_swapout.c.
Based on this, we want pageproc to emulate kswapd, not vmproc.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D18061
These definitions will be used by a driver to implement Hardware
P-States (autonomous control of HWP, via Intel Speed Shift technology).
Reviewed by: kib
Approved by: emaste (mentor)
Differential Revision: https://reviews.freebsd.org/D18050
These are used by kms-drm to determine various heuristics relate
memory conditions.
The number of free swap pages is just a variable, and it can be
much cheaper by either adding a new getter, or simply extern'ing
swap_total. However, this patch opts to use the more expensive,
existing interface - since this isn't an operation in a high per
path.
This allows us to remove some more gpl linuxkpi and do the follo
kms-drm:
git rm linuxkpi/gplv2/include/linux/swap.h
Reviewed by: mmacy, Johannes Lundberg <johalun0@gmail.com>
Approved by: emaste (mentor)
Differential Revision: https://reviews.freebsd.org/D18052
to avoid buffer accessed out of bounds, also switch to snprintf(3).
PR: 200859
Submitted by: Caglar <caglar@10ur.org>
Obtained from: https://github.com/mist64/xhyve/pull/24
MFC after: 4 weeks
Sponsored by: iXsystems Inc.
This note will be used to allow binaries to opt out of, or in to,
upcoming vulnerability mitigation and other features. It is not yet
connected but being added now to facilitate testing and ensure
compatibility with existing kernels and tools.
Reviewed by: brooks, jhb, kib, markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17438
Enable evdev on ppc32 as well, similar to what was done i386 and amd64 in
r340387 and ppc64 in r340632.
Evdev can be used by X and is used by wayland to handle input devices.
Approved by: jhibbits
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D18049
Many components under stand/ had CLANG_NO_IAS added when Clang's
Integrated Assembler (IAS) did not handle .codeNN directives. Clang
gained support quite some time ago, and we can now build stand/ with
IAS.
Note that in some cases there are small differences in the generated
output, so CLANG_NO_IAS should be removed only after testing (or after
finding no differences in the output).
PR: 205250, 233094
Sponsored by: The FreeBSD Foundation
Important users of unr like tmpfs or pipes can get away with just
ever-increasing counters, making the overhead of managing the state
for 32 bit counters a pessimization.
Change it to an atomic variable. This can be further sped up by making
the counts variable "allocate" ranges and store them per-cpu.
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18054
immediately after other PLT relocs.
Otherwise, if the object has relro page, we write to readonly page,
and we would need to use mprotect(2) two more times to fix it. Note
that resolve_object_ifunc() does nothing when called second time, so
there is no need to avoid existing call.
Reported and tested by: emaste
PR: 233333
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
This was hidden behind the LINUX_CMSG_NXTHDR macro which dereferences its
second argument. Stop using the macro as well as LINUX_CMSG_FIRSTHDR. Use
the size field of the kernel copy of the control message header to obtain
the next control message.
PR: 217901
MFC after: 2 days
X-MFC-With: r340631
Integer overflows and wrong constants limited the accuracy of these
functions and created situatiosn where sbttoXs(Xstosbt(Y)) != Y. This
was especailly true in the ns case where we had millions of values
that were wrong.
Instead, used fixed constants because there's no way to say ceil(X)
for integer math. Document what these crazy constants are.
Also, use a shift one fewer left to avoid integer overflow causing
incorrect results, and adjust the equasion accordingly. Document this.
Allow times >= 1s to be well defined for these conversion functions
(at least the Xstosbt). There's too many users in the tree that they
work for >= 1s.
This fixes a failure on boot to program firmware on the mlx4
NIC. There was a msleep(1000) in the code. Prior to my recent rounding
changes, msleep(1000) worked, but msleep(1001) did not because the old
code rounded to just below 2^64 and the new code rounds to just above
it (overflowing, causing the msleep(1000) to really sleep 1ms).
A test program to test all cases will be committed shortly. The test
exaustively tries every value (thanks to bde for the test).
Sponsored by: Netflix, Inc
Differential Revision: https://reviews.freebsd.org/D18051
NFSv3's ReaddirPlus and NFSv4's Readdir operations. The code
checked for a zero argument, but did not check for a very large value.
This patch clips dircount at the server's maximum data size.
MFC after: 1 week
The code assumed that this would indicate a corrupted mbuf chain, but
it could simply be caused by bogus RPC message data.
This patch replaces the panic() with a printf() plus error return.
MFC after: 1 week
provide a _MEMMOVE extension of _MEMCPY that deals with overlap based on
the previous bcopy(9) implementation and use the former for bcopy(9) and
memmove(9). This addresses my D15374 review comment, avoiding extra MOVs
in case of memmove(9) and trashing the stack pointer.
