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
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
This patch utilizes the fixed_devclass attribute in order to make sure
other acpi devices with params don't get confused for an EC device.
The existing code assumes that acpi_ec_probe is only ever called with a
dereferencable acpi param. Aside from being incorrect because other
devices of ACPI_TYPE_DEVICE may be probed here which aren't ec devices,
(and they may have set acpi private data), it is even more nefarious if
another ACPI driver uses private data which is not dereferancable. This
will result in a pointer deref during boot and therefore boot failure.
On X86, as it stands today, no other devices actually do this (acpi_cpu
checks for PROCESSOR type devices) and so there is no issue. I ran into
this because I am adding such a device which gets probed before
acpi_ec_probe and sets private data. If ARM ever has an EC, I think
they'd run into this issue as well.
There have been several iterations of this patch. Earlier
iterations had ECDT enumerated ECs not call into the probe/attach
functions of this driver. This change was Suggested by: jhb@.
Reviewed by: jhb
Approved by: emaste (mentor)
Differential Revision: https://reviews.freebsd.org/D16635
As of r340465 all consumers use sbsndptr_adv and sbsndptr_noadv
Reviewed by: gallatin
Approved by: krion (mentor)
Differential Revision: https://reviews.freebsd.org/D17998
Doing so removes the dependency on proctree lock from sysctl process list
export which further reduces contention during poudriere -j 128 runs.
Reviewed by: kib (previous version)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17825
For some reason the proc UMA zone's ctor, dtor and init functions are
instrumented, but these functions are always available through FBT.
Moreover, the probes are not part of the original Solaris proc
provider, aren't documented, have no uses (e.g., in dwatch(8)) and
have no clear use to begin with. Therefore, remove them.
Reviewed by: rpaulo
Differential Revision: https://reviews.freebsd.org/D2169
Allow the location of capabilities.conf to be configured.
Also allow a per-abi syscall prefix to be configured with the
abi_func_prefix syscalls.conf variable and check syscalls against
entries in capabilities.conf with and without the prefix amended.
Take advantage of these two features to allow use shared capabilities.conf
between the default syscall vector and the freebsd32 compatability
layer. We've been inconsistent about keeping the two in sync as
evidenced by the bugs fixed in r340294. This eliminates that problem
going forward.
Reviewed by: kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17932
mutexes but now are converted to epoch(9) use thread-private epoch_tracker.
Embedding tracker into ifnet(9) or ifnet derived structures creates a non
reentrable function, that will fail miserably if called simultaneously from
two different contexts.
A thread private tracker will provide a single tracker that would allow to
call these functions safely. It doesn't allow nested call, but this is not
expected from compatibility KPIs.
Reviewed by: markj
They only showed up after I redefined LOCKSTAT_ENABLED to 0.
doing_lockprof in mutex.c is a real (but harmless) bug. Should the
value be non-zero it will do checks for lock profiling which would
otherwise be skipped.
state in rwlock.c is a wart from the compiler, the value can't be
used if lock profiling is not enabled.
Sponsored by: The FreeBSD Foundation
Change the assert paths in rm, rw, and sx locks to match the lock
and unlock paths. I did this for mutexes in r306346.
Reported by: Travis Lane <tlane@isilon.com>
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
processors would benefit from avoiding a function call, but bloating
code. In fact, clang created an uninlined real function for many
object files in the network stack.
- Move epoch_private.h into subr_epoch.c. Code copied exactly, avoiding
any changes, including style(9).
- Remove private copies of critical_enter/exit.
Reviewed by: kib, jtl
Differential Revision: https://reviews.freebsd.org/D17879
Remove restrictions that prevent allocation requests to cross the
boundary between two meta nodes.
Replace the bmu_avail field in meta nodes with a bitmap that identifies
which subtrees have some free memory, and iterate over the nonempty
subtrees only in blst_meta_alloc. If free memory is scarce, this should
make searching for it faster.
Put the code for handling the next-leaf allocation in a separate
function. When taking blocks from the next leaf empties the leaf, be
sure to clear the appropriate bit in its parent, and so on, up to the
least-common ancestor of this leaf and the next.
Eliminate special terminator nodes, and rely instead on the fact that
there is a 0-bit at the end of the bitmask at the root of the tree that
will stop a meta_alloc search, or a next-leaf search, before the search
falls off the end of the tree. Make sure that the tree is big enough to
have space for that 0-bit.
Eliminate special all-free indicators. Lazy initialization of subtrees
stands in the way of having an allocation span a meta-node boundary, so
a subtree of all free blocks is not treated specially. Subtrees of
all-allocated blocks are still recognized by looking at the bitmask at
the root and finding 0.
Don't print all-allocated subtrees. Do print the bitmasks for meta
nodes, when tree-printing.
Submitted by: Doug Moore <dougm@rice.edu>
Reviewed by: alc
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D12635
Both to formally document the requirement that this not be called after the
dynamic kenv is setup, and to perhaps help static analyzers figure out
what's going on. While calling init_static_kenv this late isn't fatal, there
are some caveats that the caller should be aware of:
- Late calls are effectively a no-op, as far as default FreeBSD is
concerned, as everything will switch to searching the dynamic kenv once it's
available.
- Each of the kern_getenv calls will leak memory, as it's assumed that
these are searching static environment and allocations will not be made.
As such, this usage is not sensible and should be detected.
The vlan interfaces can be created from vnet jails, it seems, so it
sounds logical to allow pcp configuration as well.
Reviewed by: bz, hselasky (previous version)
Sponsored by: Mellanox Technologies
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D17777
Correct boneheaded assertion I added in r339501. Mea culpa.
The intent is to notice when an M_WAITOK zone allocation would fail during
netdump, not to prevent all use of mbufs during netdump.
Reviewed by: markj
X-MFC-With: r339501
Differential Revision: https://reviews.freebsd.org/D17957
This also removes a lot of #ifdefs and cleans up a warning when the
AUDIT kernel option is defined, but neither KDTRACE_HOOKS nor MAC are.
Reported and tested by: danger
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
The path must have a tail which does not escape starting/topping
directory. The documentation will come shortly, see the man pages
commit message for the reason of separate commit.
Reviewed by: jilles (previous version)
Discussed with: emaste
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D17714
As dev_t is now a 64-bit integer, it requires special handling as a
system call argument. 64-bit arguments are split between two 64-bit
integers due to the way arguments are promoted to allow reuse of most
system call implementations. They must be reassembled before use.
Further, 64-bit arguments at an odd offset (counting from zero) are
padded and slid to the next slot on powerpc and mips. Fix the
non-COMPAT11 system call by adding a freebsd32_mknodat() and
appropriately padded declerations.
The COMPAT11 system calls are fully compatible with the 64-bit
implementations so remove the freebsd32_ versions.
Use uint32_t consistently as the type of the old dev_t. This matches
the old definition.
Reviewed by: kib
MFC after: 3 days
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17928
The previous code required that the return type be a single word. This
allows it to be a pointer without using a typedef.
Update the return types of break, mmap, and shmat to be void * as
declared. This only effects systrace output in-tree, but can aid in
generating system call wrappers from syscalls.master.
Reviewed by: kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17873
Different compilation units may otherwise get a different view of the
layout of struct tty depending on whether they include opt_printf.h.
This caused a blowup in the number of types defined in the kernel's
CTF file after r339468; thanks to dim@ for bisecting down to that
revision.
PR: 232675
Reported by: dim
Reviewed by: cem (previous version)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17877
These submaps are used for mapping pipe buffers and execv() argument
strings respectively, so there's no need for such mappings to have
execute permissions.
Reported by: jhb
Reviewed by: alc, jhb, kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17827
Leave ptrace(2) alone for the moment as it's defined to take a caddr_t.
Reviewed by: kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17852
This allows us to build the ubsan code added in r340189 into the kernel
with the KUBSAN option. This will report when undefined behaviour is
detected in the currently running kernel.
As it can be large, the kernel is 65MB on arm64, loader may not be able to
load the kernel on all architectures so is disabled by default for now.
Sponsored by: DARPA, AFRL
This imports revision 1.3 of common/lib/libc/misc/ubsan.c from NetBSD, the
micro-ubsan code. It is an implementation of the Undefined Behavior
Sanitizer runtime for use with recent clang and gcc.
The uubsan code will be used in a later commit to implement kubsan to help
find undefined behavior in the kernel.
Sponsored by: DARPA, AFRL
Replace a call to DELAY(1) with a new cpu_lock_delay() KPI. Currently
cpu_lock_delay() is defined to DELAY(1) on all platforms. However,
platforms with a DELAY() implementation that uses spin locks should
implement a custom cpu_lock_delay() doesn't use locks.
Reviewed by: kib
MFC after: 3 days
We already allow to use poll(2). There is no reason to disallow ppoll(2).
PR: 232495
Submitted by: Stefan Grundmann <sg2342@googlemail.com>
Reviewed by: cem, oshogbo
MFC after: 2 weeks
In discussing D17503 "Run epoch calls sooner and more reliably" with
sbahra@ we came to the conclusion that epoch is currently misusing the
ck_epoch API. It isn't safe to do a "write side" operation (ck_epoch_call
or ck_epoch_poll) in the middle of a "read side" section. Since, by definition,
it's possible to be preempted during the middle of an EPOCH_PREEMPT
epoch the GC task might call ck_epoch_poll or another thread might call
ck_epoch_call on the same section. The right solution is ultimately to change
the way that ck_epoch works for this use case. However, as a stopgap for
12 we agreed to simply have separate records for each use case.
Tested by: pho@
MFC after: 3 days
These arguments are mostly paths handled by NAMEI*() macros which already
take const char * arguments.
This change improves the match between syscalls.master and the public
declerations of system calls.
Reviewed by: kib (prior version)
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17812
