Pedro F. Giffuni [Thu, 20 Dec 2012 02:22:36 +0000 (02:22 +0000)]
More constant renaming in preparation for newer features.
We also try to make better use of the fs flags instead of
trying adapt the code according to the fs structures. In
the case of subsecond timestamps and birthtime we now
check that the feature is explicitly enabled: previously
we only checked that the reserved space was available and
silently wrote them.
This approach is much safer, especially if the filesystem
happens to use embedded inodes or support EAs.
Olivier Houchard [Thu, 20 Dec 2012 00:38:08 +0000 (00:38 +0000)]
Busdma enhancements, especially for managing small uncacheable buffers.
- Use the new architecture-agnostic buffer pool manager that uses uma(9)
to manage a set of power-of-2 sized buffers for bus_dmamem_alloc().
- Create pools of buffers backed by both regular and uncacheable memory,
and use them to handle regular versus BUS_DMA_COHERENT allocations.
- Use uma(9) to manage a pool of bus_dmamap structs instead of local code
to manage a static list of 500 items (it took 3300 maps to get to
multi-user mode, so the static pool wasn't much of an optimization).
- Small BUS_DMA_COHERENT allocations no longer waste an entire page per
allocation, or set pages to uncached when they contain data other than
DMA buffers. There's no longer a need for drivers to work around the
inefficiency by allocing large buffers then sub-dividing them.
- Because we know the alignment and padding of buffers allocated by
bus_dmamem_alloc() (whether coherent or regular memory, and whether
obtained from the pool allocator or directly from the kernel) we
can avoid doing partial cacheline flushes on them.
- Add a fast-out to _bus_dma_could_bounce() (and some comments about
what the routine really does because the old misplaced comment was wrong).
- Everywhere the dma tag alignment is used, the interpretation is that
an alignment of 1 means no special alignment. If the tag is created
with an alignment argument of zero, store it in the tag as one, and
remove all the code scattered around that changed 0->1 at point of use.
- Remove stack-allocated arrays of segments, use a local array of two
segments within the tag struct, or dynamically allocate an array at first
use if nsegments > 2. On an arm system I tested, only 5 of 97 tags used
more than two segments. On my x86 desktop it was only 7 of 111 tags.
Submitted by: Ian Lepore <freebsd@damnhippie.dyndns.org>
Olivier Houchard [Thu, 20 Dec 2012 00:34:54 +0000 (00:34 +0000)]
Create an architecture-agnostic buffer pool manager that uses uma(9) to
manage a set of power-of-2 sized buffers for bus_dmamem_alloc().
This allows the caller to provide the back-end allocator uma allocator,
allowing full control of the memory pages backing the pool. For
convenience, it provides an optional builtin allocator that provides pages
allocated with the VM_MEMATTR_UNCACHEABLE attribute, for managing pools of
DMA buffers for BUS_DMA_COHERENT or BUS_DMA_NOCACHE.
This also allows the caller to specify a minimum alignment, and it ensures
that all buffers start on a boundary and have a length that's a multiple of
that value, to avoid using buffers that trigger partial cache line flushes.
Submitted by: Ian Lepore <freebsd@damnhippie.dyndns.org>
Jeff Roberson [Wed, 19 Dec 2012 20:10:00 +0000 (20:10 +0000)]
- Add new machine parsable KTR macros for timing events.
- Use this new format to automatically handle syscalls and VOPs. This
changes the earlier format but is still human readable.
When we have some address to forward (e.g. it was specified with ipfw fwd),
we should pass it as first argument into in6_selectroute_fib function to
initiate new route lookup.
Brooks Davis [Tue, 18 Dec 2012 16:37:24 +0000 (16:37 +0000)]
Replace our implementation of the vis(3) and unvis(3) APIs with
NetBSD's. This output size limited versions of vis and unvis functions
as well as a set of vis variants that allow arbitrary characters to be
specified for encoding.
Finally, MIME Quoted-Printable encoding as described in RFC 2045 is
supported.
* The warning message was:
'warning error: format string is not a string literal';
* Changed how make_dev is called, now a string literal
for formatting is used;
Andrey Zonov [Tue, 18 Dec 2012 07:27:50 +0000 (07:27 +0000)]
- Set memorylocked limit to 64Kb for default login class.
This prevents unprivileged users to lock too much memory.
- Set memorylocked limit to 64Mb for daemon login class.
Some daemons such as amd(8) and watchdogd(8) calls mlockall(2) on
startup, they are run from init(8) which uses daemon login class.
- Set memorylocked limit to unlimited for root login class.
Andrew Turner [Tue, 18 Dec 2012 07:26:55 +0000 (07:26 +0000)]
Get libcompiler-rt and libgcc building on ARM with clang.
* Don't provide clear_cache or the __sync_* functions on ARM with clang as
they are provided by clang as builtin functions.
* Tell clang it is aloud to compile some libgcc code using heinous GCC
extensions.
Rick Macklem [Tue, 18 Dec 2012 00:25:48 +0000 (00:25 +0000)]
Piete.Brooks at cl.cam.ac.uk reported via email a crash which was
caused by use of an invalid kgss_gssd_handle during an upcall to
the gssd daemon when it has exited. This patch seems to avoid the
crashes by holding a reference count on the kgss_gssd_handle until
the upcall is done. It also adds a new mutex kgss_gssd_lock used to
make manipulation of kgss_gssd_handle SMP safe.
Tested by: Illias A. Marinos, Herbert Poeckl
Reviewed by: jhb
MFC after: 2 weeks
Jim Harris [Tue, 18 Dec 2012 00:00:07 +0000 (00:00 +0000)]
Use CAM_DEV_NOT_THERE instead of CAM_SEL_TIMEOUT to report nonexistent
LUNs for the virtual processor device. This removes lots of CAM warnings,
and follows similar recent changes to tws(4) and twa(4) drivers.
Also fix case where CAM_REQ_CMP was getting OR'd with CAM_DEV_NOT_THERE
in the nonexistent LUN case, resulting in different CAM status (CAM_UA_TERMIO)
getting reported to CAM. This issue existing previously, but was more subtle
because it changed CAM_SEL_TIMEOUT to CAM_CMD_TIMEOUT.
Sponsored by: Intel
Reported and tested by: Willem Jan Withagen <wjw@digiware.nl>
MFC after: 1 week
Since we use different flags to detect tcp forwarding, and we share the
same code for IPv4 and IPv6 in tcp_input, we should check both
M_IP_NEXTHOP and M_IP6_NEXTHOP flags.
Pyun YongHyeon [Mon, 17 Dec 2012 06:01:57 +0000 (06:01 +0000)]
Make sure to stop both TX and RX MACs in ale_stop_mac(). Previously
it used to stop TX MAC only such that MAC reconfiguration after
getting a link didn't work as expected.
With rotating kernel dumps the higest dump number is not necessarily the
last one. To make it easier to find the last one create symlinks with 'last'
suffix that will point to the files of the last coredump, eg.:
Move expand_name() after process lock is released.
This fixed panic where we hold mutex (process lock) and try to obtain sleepable
lock (vnode lock in expand_name()). The panic could occur when %I was used
in kern.corefile.
Additionally we avoid expand_name() overhead when coredumps are disabled.
sbuf_trim() cannot be used on sbuf with drain function set.
This fixes panic when listing sysctls on INVARIANTS-enabled kernel while
having wbwd loaded.
This panic was not fatal, at worst one additional space was printed.
Also sbuf_trim() makes some sense even if drain function is set. The drain
function is called only when buffer is to be expanded. So we could still trim
existing buffer before drain is called. In this case it worked just fine - the
trailing space was correctly trimmed.
The problem is clang will move the two arrays out of the .ctors and .dtors
sections causing these sections to contain a single null address. By not
defining these macros we use the version of the code that places the arrays
is their sections by using __attribute__((section(".ctors"))) and similar
for .dtors.
Submitted by: Daisuke Aoyama <aoyama AT peach.ne.jp>
In additional to the tailq of IPv6 addresses add the hash table.
For now use 256 buckets and fnv_hash function. Use xor'ed 32-bit
s6_addr32 parts of in6_addr structure as a hash key. Update
in6_localip and in6_is_addr_deprecated to use hash table for fastest
lookup.
Mikolaj Golub [Sat, 15 Dec 2012 18:21:09 +0000 (18:21 +0000)]
Change `iostat -Ix` to display total duration of transactions instead
of average duration, and total busy time instead of %.
This looks more useful when one runs `iostat -Ix` periodically to
collect statistics: e.g. now it is possible to calculate busy %
between two runs subtracting total busy times and dividing per time
period.
Average duration and % busy are still available via `iostat -x`.
Robert Watson [Sat, 15 Dec 2012 15:21:09 +0000 (15:21 +0000)]
Four .c files from OpenBSM are used, in modified form, by the kernel to
implement the BSM audit trail format. Rename the kernel versions of the
files to match the userspace filenames so that it's easier to work out
what they correspond to, and therefore ensure they are kept in-sync.
Robert Watson [Sat, 15 Dec 2012 14:59:00 +0000 (14:59 +0000)]
Merge OpenBSM 1.2-alpha3 from the vendor branch to 10-CURRENT; this version
included various upstreamed patches from the FreeBSD base to make OpenBSM
compile more easily with bmake, higher warning levels, clang, and several
other loose ends.
Robert Watson [Sat, 15 Dec 2012 13:27:45 +0000 (13:27 +0000)]
Vendor import of OpenBSM 1.2-alpha3. This eliminates most local patches
made relative to OpenBSM 1.2-alpha2 in order to build OpenBSM as part of
the FreeBSD base.
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