fine when a lot of different flows to be ciphered/deciphered are involved.
However, when a software crypto driver is used, there are
situations where we could benefit from making crypto(9) multi threaded:
- a single flow is to be ciphered: only one thread is used to cipher it,
- a single ESP flow is to be deciphered: only one thread is used to
decipher it.
The idea here is to call crypto(9) using a new mode (CRYPTO_F_ASYNC) to
dispatch the crypto jobs on multiple threads, if the underlying crypto
driver is working in synchronous mode.
Another flag is added (CRYPTO_F_ASYNC_KEEPORDER) to make crypto(9)
dispatch the crypto jobs in the order they are received (an additional
queue/thread is used), so that the packets are reinjected in the network
using the same order they were posted.
A new sysctl net.inet.ipsec.async_crypto can be used to activate
this new behavior (disabled by default).
Submitted by: Emeric Poupon <emeric.poupon@stormshield.eu>
Reviewed by: ae, jmg, jhb
Differential Revision: https://reviews.freebsd.org/D10680
Sponsored by: Stormshield
Mention per-location total order, out of thin air, and torn writes
guarantees. Mention C11 standard' memory model and one most important
FreeBSD additional requirement, that is aligned ordinary loads and
stores are atomic on processors.
The text is introductional and informal. Reference the C11 and
C++1{1,4,7} standards for authorative description.
In collaboration with: alc
Sponsored by: The FreeBSD Foundation (kib)
MFC after: 1 week
mbpool existed to support NICs with memory interfaces and all remaining
comsumers were removed earlier this year with NATM.
Reviewed by: jhb
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D10513
Previously before you could call unrhdr_delete you needed to
individually free every allocated unit. It is useful to be able to tear
down the unr without having to go through this process, as it is
significantly faster than freeing the individual units.
Reviewed by: cem, lidl
Approved by: rstone (mentor)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D12591
All of these arguments are stored in m_ext, so there is no reason
to pass them in the argument list. Not all functions need the second
argument, some don't even need the first one. The second argument
lives in next cache line, so not dereferencing it is a performance
gain. This was discovered in sendfile(2), which will be covered by
next commits.
The second goal of this commit is to bring even more flexibility
to m_ext mbufs, allowing to create more fields in m_ext, opaque to
the generic mbuf code, and potentially set and dereferenced by
subsystems.
Reviewed by: gallatin, kbowling
Differential Revision: https://reviews.freebsd.org/D12615
When the EVENTHANDLER(9) subsystem was created, it was a documented feature
that an eventhandler callback function could safely deregister itself. In
r200652 that feature was inadvertantly broken by adding drain-wait logic to
eventhandler_deregister(), so that it would be safe to unload a module upon
return from deregistering its event handlers.
There are now 145 callers of EVENTHANDLER_DEREGISTER(), and it's likely many
of them are depending on the drain-wait logic that has been in place for 8
years. So instead of creating a separate eventhandler_drain() and adding it
to some or all of those 145 call sites, this creates a separate
eventhandler_drain_nowait() function for the specific purpose of
deregistering a callback from within the running callback.
Differential Revision: https://reviews.freebsd.org/D12561
during drain operations. When an sbuf is configured to use this feature by way
of the SBUF_DRAINTOEOR sbuf_new() flag, top-level sections started with
sbuf_start_section() create a record boundary marker that is used to avoid
flushing partial records.
Reviewed by: cem,imp,wblock
MFC after: 2 weeks
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D8536
it automatically after it runs.
The config_intrhook mechanism allows a driver to stall the boot process
until device(s) required for booting are available, by not allowing system
inits to proceed until all intrhook functions have been unregistered.
Virtually all existing code simply unregisters from within the hook function
when it gets called.
This new function makes that common usage more convenient. Instead of
allocating and filling in a struct, passing it to a function that might (in
theory) fail, and checking the return code, now a driver can simply call
this cannot-fail routine, passing just the intrhook function and its arg.
Differential Revision: https://reviews.freebsd.org/D11963
Implement disk_add_alias to allow aliases to be added to disks. All
disk have a primary name (say "foo") can also have secondary names
(say "bar") such that all instances of "foo" also have a "bar"
alias. So if you have foo0, foo0p1, foo1, foo1s1 and foo1s1a nodes
created by the foo driver and gpart, device nodes bar0, bar0p1, bar1,
bar1s1 and bar1s1a will appear as symlinks back to the original nodes.
This generalizes to multiple aliases. However, since the unit number
follows the primary name, multiple device drivers can't create the
same aliases unless those drives coorinate the unit number space (eg
you couldn't add an alias 'disk' to both 'da' and 'ada' because it's
possible to have da0 and ada0, because 'disk0' is ambiguous).
Differential Revision: https://reviews.freebsd.org/D11873
over the scheduling precision than 'ticks' can offer, and because sometimes
you're already working with sbintime_t units and it's dumb to convert them
to ticks just so they can get converted back to sbintime_t under the hood.
The benefit of BIT_FLS() is that ffsl() can be implemented with a
count leading zeros instruction which is more widespread available.
Submitted by: Sebastian Huber <sebastian.huber@embedded-brains.de>
MFC after: 1 week
stack modules.
It adds support for mangling symbols exported by a module by prepending
a string to them. (This avoids overlapping symbols in the kernel linker.)
It allows the use of a macro as the module name in the DECLARE_MACRO()
and MACRO_VERSION() macros.
It allows the code to register stack aliases (e.g. both a generic name
["default"] and version-specific name ["default_10_3p1"]).
With these changes, it is trivial to compile TCP stack modules with
the name defined in the Makefile and to load multiple versions of the
same stack simultaneously. This functionality can be used to enable
side-by-side testing of an old and new version of the same TCP stack.
It also could support upgrading the TCP stack without a reboot.
Reviewed by: gnn, sjg (makefiles only)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D11086
Update the documentation to catch up with r273174, which renamed
getenv -> kern_getenv
setenv -> kern_setenv
unsetenv -> kern_unsetenv
Leave the old links in place to support finger memory.
MFC after: 3 days
Sponsored by: Dell EMC
This function permits a range of one scatter/gather list to be appended to
another sglist. This can be used to construct a scatter/gather list that
reorders or duplicates ranges from one or more existing scatter/gather
lists.
Sponsored by: Chelsio Communications
Attempt to catch up to the KPI changes from r292373, and perform
some other tidying while in the area.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D10579
- move sbuf_bcopyin(9) and sbuf_copyin(9) near sbuf_new_for_sysctl(9), as
all three functions are kernel-only APIs.
- add #ifdef _KERNEL around sbuf_*copyin and sbuf_new_for_sysctl(9) to
make it visually clear that they are kernel-only APIs.
MFC after: 2 months
Sponsored by: Dell EMC Isilon
This shortens the column count on many lines considerably.
While here, add "(void)" to sbuf_new_auto(3) for consistency with style(9)
recommendations.
MFC after: 2 months
Sponsored by: Dell EMC Isilon
igor:
- Fix typos.
- Delete trailing whitespace.
manlint:
- Use .Fo/.Fc/.Fa when describing functions.
- Use .Xr.
- Fill in SEE ALSO section.
- Fix .Dt use: the section was specified incorrectly and the name
had a lowercase character.
- Continue new sentences on new lines.
Miscellaneous:
- Remove unnecessary quotes around "SEE ALSO" section headers.
- Sprinkle .Dv use in spots with constants.
Reported by: igor, make manlint
Sponsored by: Dell EMC Isilon
Add missing section number when referring to PCI_IOV_*INIT(9) with .Xr
from the other corresponding manpage.
MFC after: 1 week
Reported by: make manlint
Sponsored by: Dell EMC Isilon
- Expand a contraction [1].
- Add a missing section number when referring to uma(9) with .Xr .
MFC after: 1 week
Reported by: igor [1], make manlint [2]
Sponsored by: Dell EMC Isilon
