In non-periodic mode absolute timers fire at exactly the time given.
When specifying a fast clock, align the firing time so that less
timer interrupt events are needed.
Reviewed by: rrs @
Differential Revision: https://reviews.freebsd.org/D36858
MFC after: 1 week
Sponsored by: NVIDIA Networking
Add local functions to workaround an instruction segment trap (panic)
when the indirect functions copyin and copyout are called by an external
loadable kernel module (i.e. pfsync, zfs and linuxulator). The crash
was triggered by change 47a57144af, but
kernel binary linked with LLD 9 works fine. LLVM bisect points that LLD
behavior chaged after dc06b0bc9ad055d06535462d91bfc2a744b2f589.
This is know to affect powerpc targets only and the final fix is still
being discussed with the LLVM community.
PR: 266730
Reviewed by: luporl, jhibbits (on IRC, previous version)
MFC after: 2 days
Sponsored by: Instituto de Pesquisas Eldorado (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D36234
Modify db_show_sysctl_all so that it does not copy more than once the
data of the input oid, and so that what it passes to db_show_oid does
not alarm coverity.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D36847
Protocols such as netlink may need a large socket receive buffer,
measured in tens of megabytes. This change allows netlink to
set larger socket buffers (given the privs are in place), without
requiring user to manuall bump maxsockbuf.
Reviewed by: glebius
Differential Revision: https://reviews.freebsd.org/D36747
Allow to set custom per-protocol handlers for the socket buffers
ioctls by introducing pr_setsbopt callback with the default value
set to the currently-used sbsetopt().
Reviewed by: glebius
Differential Revision: https://reviews.freebsd.org/D36746
The implementation of sysctl_search_oid no longer relies on the
initial value of nodes to be all NULL, so remove the comment that
demands it and let the caller stop enforcing it.
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D36768
sysctl_search_old makes several tests in a loop that can be removed.
The first test in the loop is only ever true on the first loop
iteration, and is always true on that iteration, so its work can be
done before the loop begins.
The upper and lower bounds on the loop variable 'indx' are each tested
on each iteration, but 'indx' is changed in one direction or the other
only once within the loop, so only one bound needs to be checked.
Two ways remain in the loop that nodes[indx] can change (after one of
them is put before the loop start), and one of them applies exactly
when indx has been incremented, so no separate test for that case
requires testing.
Restructure and add comments that makes clearer that this is a basic
depth-first search.
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D36741
sysctl_register_oid must check the uniqueness of any newly computed
oid_number in sysctl_register_oid.
Reviewed by: asomers
MFC with: d3f96f6610
Differential Revision: https://reviews.freebsd.org/D36743
To avoid using the sysctl list macros directly in external kernel modules.
Reviewed by: asomers, manu and asiciliano
Differential Revision: https://reviews.freebsd.org/D36748
MFC after: 1 week
Sponsored by: NVIDIA Networking
Specifically, when we receive a violation and we're configured to panic,
kasan_enabled gets unset before we descend into panic(). At this point,
there's no longer any reason to allow marking as kasan_shadow_check() is
disabled -- we have some inherent risk of faulting or panicking if the
system's in a bad enough state with no benefit.
Reviewed by: markj
Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D36742
Sysctl OIDs were internally stored in linked lists, triggering O(n^2)
behavior when userland iterates over many of them. The slowdown is
noticeable for MIBs that have > 100 children (for example, vm.uma). But
it's unignorable for kstat.zfs when a pool has > 1000 datasets.
Convert the linked lists into RB trees. This produces a ~25x speedup
for listing kstat.zfs with 4100 datasets, and no measurable penalty for
small dataset counts.
Bump __FreeBSD_version for the KPI change.
Sponsored by: Axcient
Reviewed by: mjg
Differential Revision: https://reviews.freebsd.org/D36500
The vn_rlimit_fsizex() function:
- checks that the write does not exceed RLIMIT_FSIZE limit and fs
maximum supported file size
- truncates write length if it exceeds the RLIMIT_FSIZE or max file size,
but there are some bytes to write
- sends SIGXFSZ if RLIMIT_FSIZE would be exceed otherwise
POSIX mandates the truncated write in case when some bytes can be
written but whole write request fails the RLIMIT_FSIZE check.
The function is supposed to be used from VOP_WRITE()s. Due to
pecularity in the VFS generic write syscall layer, uio_resid must
correctly reflect the written amount (noted by markj). Provide the dual
vn_rlimit_fsizex_res() function to correct uio_resid after the clamp
done in vn_rlimit_fsizex() on VOP_WRITE() return.
PR: 164793
Reviewed by: asomers, jah, markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D36625
When a thread switching off-CPU is migrating to a remote CPU,
sched_switch() may trigger a rescheduling of the thread currently
running on that CPU. When doing so, it must ensure that that thread is
locked before modifying thread state. If the thread's lock is not the
scheduler lock, then the thread is in the process of switching off-CPU
and no extra effort is needed, and the initiator does not hold the
thread's lock and thus should not modify any thread state.
Reported and tested by: Steve Kargl
MFC after: 1 week
This matches the return type of pmap_mapdev/bios.
Reviewed by: kib, markj
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D36548
This removes some of the complexity needed to maintain HASBUF and
allows for removing injecting SAVENAME by filesystems.
Reviewed by: kib (previous version)
Differential Revision: https://reviews.freebsd.org/D36542
This is not BSD-4-Clause. It's closer to a modified BSD-2-Clause with 2
added clauses (and the first one has added clauses). Remove
SPDX-License-Idnetifier since this license doesn't match anything in
SPDX.
This was never enabled and only pollutes the code. The issue will
be addressed later in a different manner.
Sponsored by: Rubicon Communications, LLC ("Netgate")
This license has 4 clauses, and shares some text with the BSD-4-Clause
license. However, it omits the standard disclaimer and has 2 clauses all
its own. Remove this tag, since it was made in error and this doesn't
match the SPDX copy of the BSD-4-Clause license.
Sponsored by: Netflix
The interlock was already taken and released when dooming, thus by
API contract locking state cannot be legally installed.
At the same time the state is almost never there to begin with.
This call existed since pre-FreeBSD times, and it is hard to understand
why it was there in the first place. After 6f3caa6d81 it definitely
became necessary always and commit message from f1ee30ccd6 confirms that.
Now that 6f3caa6d81 is effectively backed out by 07285bb4c2, the call
appears to be useful only for sockets that landed on the incomplete queue,
e.g. sockets that have accept_filter(9) enabled on them.
Provide a new TCP flag to mark connections that are known to be on the
incomplete queue, and call soisconnected() only for those connections.
Reviewed by: rrs, tuexen
Differential revision: https://reviews.freebsd.org/D36488
Change RB_INSERT_COLOR and RB_REMOVE_COLOR so that the blocks of code
that are identical except for left and right being exchanged are made
only one block with a variable to indicate left- or right-handedness.
Rename RB macros so that those not intended for external use begin
with an underscore.
Add comments to the balancing code so that another might understand it.
Reviewed by: alc, kib
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D36393
