The buffer must be allocated (or even changed) before the interface is set
and thus, there is no need to verify if the buffer is in use.
MFC after: 2 weeks
Sponsored by: Rubicon Communications (Netgate)
the buffer is allocated we are committed to a particular buffer method
(BPF_BUFMODE_BUFFER in this case).
If we are using zero-copy buffers, the userland program must register its
buffers before set the interface.
If we are using kernel memory buffers, we can allocate the buffer at the
time that the interface is being set.
This fix allows the usage of BIOCSETBUFMODE after r235746.
Update the comments to reflect the recent changes.
MFC after: 2 weeks
Sponsored by: Rubicon Communications (Netgate)
unwind_frame function to read each stack frame until either the pc or stack
are no longer withing the kernel's address space.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
This is copied from the amd64 version with minor changes. These should be
merged into a single file as from a quick look there are other copies of
the same file in other parts of the tree.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
when trying to read data from outside the DMAP region. I expect this panic
to be from within uiomove_fromphys, which needs to grow support to support
such addresses.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
On CloudABI, the rights bits returned by cap_rights_get() match up with
the operations that you can actually perform on the file descriptor.
Limiting the rights is good, because it makes it easier to get uniform
behaviour across different operating systems. If process descriptors on
FreeBSD would suddenly gain support for any new file operation, this
wouldn't become exposed to CloudABI processes without first extending
the rights.
Extend fork1() to gain a 'struct filecaps' argument that allows you to
construct process descriptors with custom rights. Use this in
cloudabi_sys_proc_fork() to limit the rights to just fstat() and
pdwait().
Obtained from: https://github.com/NuxiNL/freebsd
still on going, but it has passed world for mips and powerpc...
I know this has an extra semicolon, but this is the patch that is
tested...
Looks like better fix is to use _Static_assert...
has observable overhead when the buffer pages are not resident or not
mapped. The overhead comes at least from two factors, one is the
additional work needed to detect the situation, prepare and execute
the rollbacks. Another is the consequence of the i/o splitting into
the batches of the held pages, causing filesystems see series of the
smaller i/o requests instead of the single large request.
Note that expected case of the resident i/o buffer does not expose
these issues. Provide a prefaulting for the userspace i/o buffers,
disabled by default. I am careful of not enabling prefaulting by
default for now, since it would be detrimental for the applications
which speculatively pass extra-large buffers of anonymous memory to
not deal with buffer sizing (if such apps exist).
Found and tested by: bde, emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
use CTASSERTs now that we have them...
Replace a draft w/ RFC that's over 10 years old.
Note that _AALG and _EALG do not need to match what the IKE daemons
think they should be.. This is part of the KABI... I decided to
renumber AESCTR, but since we've never had working AESCTR mode, I'm
not really breaking anything.. and it shortens a loop by quite
a bit..
remove SKIPJACK IPsec support... SKIPJACK never made it out of draft
(in 1999), only has 80bit key, NIST recommended it stop being used
after 2010, and setkey nor any of the IKE daemons I checked supported
it...
jmgurney/ipsecgcm: a357a33, c75808b, e008669, b27b6d6
Reviewed by: gnn (earlier version)
The IPsec SA statistic keeping is used even for decision making on expiry/rekeying SAs.
When there are multiple transformations being done the statistic keeping might be wrong.
This mostly impacts multiple encapsulations on IPsec since the usual scenario it is not noticed due to the code path not taken.
Differential Revision: https://reviews.freebsd.org/D3239
Reviewed by: ae, gnn
Approved by: gnn(mentor)
Right now there is a chance that sysctl unregister will cause reader to
block on the sx lock associated with sysctl rmlock, in which case kernels
with debug enabled will panic.
Brightness is controlled through sysctl dev.gpiobacklight.X.brightness:
- any value greater than 0: backlight is on
- any value less than or equal to 0: backlight is off
FDT bindings docs in Linux tree:
Documentation/devicetree/bindings/video/backlight/gpio-backlight.txt
In tf_dequeue(), if we reach the end of the list without finding a
non-cancelled element, "tmp" will be a pointer into the list head, so the
tmp->canceled check is bogus. Use a flag instead.
Submitted by: Tao Liu <Tao.Liu@isilon.com>
Reviewed by: hselasky
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D3244
the VM_FAULT_CHANGE_WIRING flag to VM_FAULT_WIRE. Assert that the
flag is only passed when faulting on the wired map entry. Remove the
vm_page_unwire() call, which should be never reachable.
Since VM_FAULT_WIRE flag implies wired map entry, the TRYPAGER() macro
is reduced to the testing of the fs.object having a default pager.
Inline the check.
Suggested and reviewed by: alc
Tested by: pho (previous version)
MFC after: 1 week
The check added in r285872 can trigger for valid buffers if the buffer space
used happens to be just after unmapped_buf in KVA space.
Discussed with: kib
Sponsored by: Citrix Systems R&D
This includes additional functions to be protected: those that
have local array definitions, or have references to local frame
addresses. This is a new option in GCC-4.9 that was relicensed
by Han Shen from Google under GPLv2 for OpenBSD.
Obtained from: OpenBSD (2014-01-14)
MFC after: 2 weeks
FreeBSD provides a feature called Adaptive Mutexes, which allows
a thread to spin for a while when the mutex is taken instead of
immediately going to sleep. This causes issues when called from
syscall handler if interrupts are masked. If every other core
also attempts to access the same mutex there is a chance that
all of them are spinning on the same lock at the same time.
If interrupts are disabled, no kernel preemtion can occur and
the system becomes unresponsive.
This patch enables interrupts when syscall is being executed
and masks them as soon as it is completed.
Reviewed by: andrew
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3246
This is a clean-up patch from a serie delivering support for
Annapurna Labs Alpine PoC.
The HAL files have already been added to sys/contrib/alpine-hal
so there is no need for them in the platform directory.
This patch removes obsolete files.
Reviewed by: andrew
Obtained from: Semihalf
Sponsored by: Annapurna Labs
Differential Revision: https://reviews.freebsd.org/D3248
ELF Tool Chain built on FreeBSD's ar and elfdump, but has a number of
improvements and enhancements. Bring them into contrib in order to start
integrating into our build.
issues on some EC2 instance types. Users may want to experiment with
removing this from loader.conf and measuring the performance impact on
the EC2 instances they are using.
