marius [Sat, 9 Mar 2013 02:36:32 +0000 (02:36 +0000)]
MFC: r227309 (partial)
Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.
The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.
rstone [Fri, 8 Mar 2013 21:07:01 +0000 (21:07 +0000)]
MFC r244631
Correct a series of errors in the hand-rolled locking for drace_debug.c:
- Use spinlock_enter()/spinlock_exit() to prevent a thread holding a
debug lock from being preempted to prevent other threads waiting
on that lock from starvation.
- Handle the possibility of CPU migration in between the fetch of curcpu
and the call to spinlock_enter() by saving curcpu in a local variable.
- Use memory barriers to prevent reordering of loads and stores of the
data protected by the lock outside of the critical section
- Eliminate false sharing of the locks by moving them into the structures
that they protect and aligning them to a cacheline boundary.
- Record the owning thread in the lock to make debugging future problems
easier.
rstone [Fri, 8 Mar 2013 19:36:36 +0000 (19:36 +0000)]
MFC r241009
Ensure that all cases that enqueue a netgraph item for delivery by a
ngthread properly set the item's depth to 1. In particular, prior to this
change if ng_snd_item failed to acquire a lock on a node, the item's depth
would not be set at all. This fix ensures that the error code from rcvmsg/
rcvdata is properly passed back to the apply callback. For example, this
fixes a bug where an error from rcvmsg/rcvdata would not previously
propagate back to a libnetgraph consumer when the message was queued.
rstone [Fri, 8 Mar 2013 19:01:26 +0000 (19:01 +0000)]
MFC r240923
Some aac(4) adapters will always report that a direct access device is
offline in response to a INQUIRY command that does not retreive vital
product data(I personally have observed the behaviour on an Adaptec 2405
and a 5805). Force the peripheral qualifier to "connected" so that upper
layers correctly recognize that a disk is present.
This bug was uncovered by r216236. Prior to that fix, aac(4) was
accidentally clearing the peripheral qualifier for all inquiry commands.
This fixes an issue where passthrough devices were not created for
disks behind aac(4) controllers suffering from the bug. I have
verified that if a disk is not present that we still properly detect
that and not create the passthrough device.
marius [Fri, 8 Mar 2013 12:57:58 +0000 (12:57 +0000)]
MFC: r247632
- Complete r231621 (MFC'ed to stable/9 in r232092) by also blacklisting the
bridge used by VMware for PCIe devices. While at it, update the comment
now that we know that MSI-X doesn't work with ESXi 5.1 for Intel 82576
either and the underlying issue is a bug in the MSI-X allocation code of
the hypervisor.
Reported by: Harald Schmalzbauer
- Make the nomatch table const.
marius [Fri, 8 Mar 2013 12:50:29 +0000 (12:50 +0000)]
MFC: r247600, r247620
- While Netra X1 generally show no ill effects when registering a power
fail interrupt handler, there seems to be either a broken batch of them
or a tendency to develop a defect which causes this interrupt to fire
inadvertedly. Given that apart from this problem these machines work
just fine, add a tunable allowing the setup of the power fail interrupt
to be disabled.
While at it, remove the DEBUGGER_ON_POWERFAIL compile time option and
make that behavior also selectable via the newly added tunable.
- Correct an incorrect argument to shutdown_nice(9).
- Mark unused parameters as such.
- Use NULL instead of 0 for pointers.
marius [Fri, 8 Mar 2013 12:44:08 +0000 (12:44 +0000)]
MFC: r247579
- Move reporting of failures to disable RX/TX MAC under bootverbose as at
least the Saturn chips of 501-6738 cards may fail to do so the first
time, which isn't fatal though.
Reported by: Paul Keusemann
- Explain why we don't enable infinite bursts on sparc64.
- Given that these chips support memory write invalidate, make sure that
it's enabled in the command register. Also make sure that PERR# and
SERR# assertion is enabled.
marius [Fri, 8 Mar 2013 12:11:37 +0000 (12:11 +0000)]
MFC: r247573
- Remove an unused header.
- Use NULL instead of 0 for pointers.
- Let ofw_pcib_probe() return BUS_PROBE_DEFAULT instead of 0 so specialized
PCI-PCI-bridge drivers may attach instead.
- Add WARs for PLX Technology PEX 8114 bridges and PEX 8532 switches.
Ideally, these should live in MI code but at least for the latter we're
missing the necessary infrastructure there.
marius [Fri, 8 Mar 2013 11:41:48 +0000 (11:41 +0000)]
MFC: r247571
- Apparently, r186520 was just wrong and the clock of Oxford OX16PCI958 is
neither DEFAULT_RCLK * 2 nor DEFAULT_RCLK * 10 but plain DEFAULT_RCLK
and there's no (open) source indicating otherwise. This was tested with
an EXSYS EX-41098-2, whose clock is not configurable and identifies as:
puc0@pci0:5:1:0: class=0x070200 card=0x06711415 chip=0x95381415 rev=0x01 hdr=0x00
vendor = 'Oxford Semiconductor Ltd'
class = simple comms
subclass = multiport serial
Note that this exactly matches the card mentioned in PR 129665 so no
sub-device/sub-vendor based quirking of the latter is possible. So maybe
we should grow some sort of tunable, in case non-default cards such as
the latter aren't configurable either (this also wouldn't be the first
time an allegedly tested commit turns out to be wrong though).
- Make the TiMedia tables const.
marius [Fri, 8 Mar 2013 11:32:58 +0000 (11:32 +0000)]
MFC: r247565, r247590
- Make tables, device ID strings etc const.
- Use NULL instead of 0 for pointers.
- Remove redundant bzero(9)'ing of the softc.
- Remove redundant/unused softc members.
- Don't allocate MSI/MSI-X as RF_SHAREABLE.
- Re-use bus accessor macros instead of duplicating them.
- In bce_miibus_{read,write}_reg(), remove superfluous limiting of the PHY
address (missed in r213893).
yongari [Wed, 6 Mar 2013 08:03:26 +0000 (08:03 +0000)]
MFC r247382:
RX checksum offloading on old Yukon controllers seem to cause more
problems. Disable RX checksum offloading on controllers that don't
use new descriptor format but give chance to enable it with
ifconfig(8).
ian [Mon, 4 Mar 2013 16:50:01 +0000 (16:50 +0000)]
MFC r246134 ...
Improve devd startup time, by tweaking some string handling routines that are
heavily used when parsing config files. Mostly these changes avoid making
temporary copies of the strings, and avoid doing byte at a time append
operations, on the most-used code path.
On a 1.2 GHz ARM processor this reduces the time to parse the config files
from 13 to 6 seconds.
gallatin [Mon, 4 Mar 2013 15:30:38 +0000 (15:30 +0000)]
MFC r247159
Improvements for newer mxge nics:
- Some mxge nics may store the serial number in the SN2 field of the
EEPROM. These will also have an SN=0 field, so parse the SN2 field,
and give it precedence.
- Skip MXGEFW_CMD_UNALIGNED_TEST on mxge nics which do not require it.
This saves roughly 10ms per port at device attach time.
markj [Sun, 3 Mar 2013 19:02:23 +0000 (19:02 +0000)]
MFC r246978:
- Make sure to set an error code when trying to obtain a data descriptor for
a section of type SHT_NULL.
- Update the man page to reflect the fact that elf_getdata() and
elf_rawdata() may return with an error of ELF_E_SECTION.
dteske [Sun, 3 Mar 2013 17:39:29 +0000 (17:39 +0000)]
MFC r230005:
Use a reasonable-sized buffer when formatting error messages about
installing zoneinfo. While we're in the vicinity, add some missing
error checking to eliminate an unhelpful error message when unlink()
fails.
/me is embarrassed by the quality of his 16-year-old code.
The whole thing is awful and could stand a complete rewrite.
marius [Sat, 2 Mar 2013 17:32:15 +0000 (17:32 +0000)]
MFC: r246257
Improve r238673 (MFC'ed to stable/9 in r239494) to additionally allow
for odd-aligned buffers as passed in by smartd of smartmontools.
While at it, hint the compiler that 32-bit PIO is the most likely
case (idea from Linux) and use bus_{read,write}_stream_2(9) instead
of bus_{read,write}_multi_stream_2(9) for single count reads/writes.
dteske [Sat, 2 Mar 2013 16:18:40 +0000 (16:18 +0000)]
Update FTP directories to include new layout. Previously discussed with
kensmith and others as this alleviates the need for the symbolic link upkeep
which is currently manually maintained.
melifaro [Sat, 2 Mar 2013 15:11:20 +0000 (15:11 +0000)]
Merge
* r233937 - Improve BPF locking model
* r233938 - Improve performace for writer-only BPF users
* r233946 - Fix build
* r235744 - Fix (new) panic on attaching to non-existent interface
* r235745 - Fix old panic when BPF consumer attaches to destroying interface
* r235746 - Call bpf_jitter() before acquiring BPF global lock
* r235747 - Make most BPF ioctls() SMP-safe.
* r236231 - Fix BPF_JITTER code broken by r235746.
* r236251 - Fix shim for BIOCSETF to drop all packets buffered on the descriptor.
* r236261 - Save the previous filter right before we set new one.
* r236262 - Fix style(9) nits, reduce unnecessary type castings.
* r236559 - Fix panic introduced by r235745
* r236806 - Fix typo introduced in r236559.
r233937
- Improve BPF locking model.
Interface locks and descriptor locks are converted from mutex(9) to rwlock(9).
This greately improves performance: in most common case we need to acquire 1
reader lock instead of 2 mutexes.
- Remove filter(descriptor) (reader) lock in bpf_mtap[2]
This was suggested by glebius@. We protect filter by requesting interface
writer lock on filter change.
- Cover struct bpf_if under BPF_INTERNAL define. This permits including bpf.h
without including rwlock stuff. However, this is is temporary solution,
struct bpf_if should be made opaque for any external caller.
r233938
- Improve performace for writer-only BPF users.
Linux and Solaris (at least OpenSolaris) has PF_PACKET socket families to send
raw ethernet frames. The only FreeBSD interface that can be used to send raw
frames is BPF. As a result, many programs like cdpd, lldpd, various dhcp stuff
uses BPF only to send data. This leads us to the situation when software like
cdpd, being run on high-traffic-volume interface significantly reduces overall
performance since we have to acquire additional locks for every packet.
Here we add sysctl that changes BPF behavior in the following way:
If program came and opens BPF socket without explicitly specifyin read filter
we assume it to be write-only and add it to special writer-only per-interface
list. This makes bpf_peers_present() return 0, so no additional overhead is
introduced. After filter is supplied, descriptor is added to original
per-interface list permitting packets to be captured.
Unfortunately, pcap_open_live() sets catch-all filter itself for the purpose
of setting snap length.
Fortunately, most programs explicitly sets (event catch-all) filter after
that. tcpdump(1) is a good example.
So a bit hackis approach is taken: we upgrade description only after second
BIOCSETF is received.
Sysctl is named net.bpf.optimize_writers and is turned off by default.
- While here, document all sysctl variables in bpf.4
r233946
Fix build broken by r233938.
r235744
Fix panic on attaching to non-existent interface
(introduced by r233937, pointed by hrs@)
Fix panic on tcpdump being attached to interface being removed
(introduced by r233937, pointed by hrs@ and adrian@)
Protect most of bpf_setf() by BPF global lock
Add several forgotten assertions (thanks to adrian@)
Document current locking model inside bpf.c
Document EVENTHANDLER(9) usage inside BPF.
r235745
Fix old panic when BPF consumer attaches to destroying interface.
'flags' field is added to the end of bpf_if structure. Currently the only
flag is BPFIF_FLAG_DYING which is set on bpf detach and checked by bpf_attachd()
Problem can be easily triggered on SMP stable/[89] by the following command
(sort of):
'while true; do ifconfig vlan222 create vlan 222 vlandev em0 up ; \
tcpdump -pi vlan222 & ; ifconfig vlan222 destroy ; done'
Fix possible use-after-free when BPF detaches itself from interface, freeing
bpf_bif memory, while interface is still UP and there can be routes via this
interface. Freeing is now delayed till ifnet_departure_event is received via
eventhandler(9) api.
Convert bpfd rwlock back to mutex due lack of performance gain
(currently checking if packet matches filter is done without holding bpfd
lock and we have to acquire write lock if packet matches)
r235746
Call bpf_jitter() before acquiring BPF global lock due to malloc() being
used inside bpf_jitter.
Eliminate bpf_buffer_alloc() and allocate BPF buffers on descriptor creation
and BIOCSBLEN ioctl. This permits us not to allocate buffers inside
bpf_attachd() which is protected by global lock.
r235747
Make most BPF ioctls() SMP-safe.
r236559
Fix panic introduced by r235745. Panic occurs after first packet traverse
renamed interface.
Add several comments on locking
r236231
Fix BPF_JITTER code broken by r235746.
r236251
Fix 32-bit shim for BIOCSETF to drop all packets buffered on the descriptor
and reset statistics as it should.
r236261
- Save the previous filter right before we set new one.
- Reduce duplicate code and make it little easier to read.
r236262
Fix style(9) nits, reduce unnecessary type castings, etc., for bpf_setf().
dim [Sat, 2 Mar 2013 14:39:48 +0000 (14:39 +0000)]
MFC r247205:
Pull in r175962 from upstream llvm trunk:
X86: Disable cmov-memory patterns on subtargets without cmov.
Fixes PR15115.
For the i386 arch, this should enable cmov instructions only on
-march=pentiumpro and higher. Since our default CPU is i486, cmov
instructions will now be disabled by default.
ian [Fri, 1 Mar 2013 20:48:53 +0000 (20:48 +0000)]
MFC r246121 ...
Fix a descriptor leak in devd. Clients reading /var/run/devd.pipe can close
their socket connection any time, and devd only notices that when it gets an
error trying to write an event to the client. On a system with no device
change activity, clients could connect and disappear repeatedly without devd
noticing, leading to an ever-growing list of open socket descriptors in devd.
Now devd uses poll(2) looking for POLLHUP on all existing clients every time
a new client connection is established, and also periodically (once a minute)
to proactively find zombie clients and reap the socket descriptors. It also
now has a connection limit, configurable with a new -l <num> command line arg.
When the maximum number of connections is reached it stops accepting new
connections until some current clients drop off.
jhb [Fri, 1 Mar 2013 19:01:40 +0000 (19:01 +0000)]
MFC 246129:
Allow the address and ports to be separated by a colon or period rather
than a space to permit directly pasting the output of commands such as
netstat and sockstat on the command line.
jhb [Fri, 1 Mar 2013 18:39:46 +0000 (18:39 +0000)]
MFC 245849:
Don't assume that all Linux TCP-level socket options are identical to
FreeBSD TCP-level socket options (only the first two are). Instead,
using a mapping function and fail unsupported options as we do for other
socket option levels.
dim [Fri, 1 Mar 2013 17:37:57 +0000 (17:37 +0000)]
MFC r247166:
Pull in r172354 from upstream clang trunk:
Refactor the x86 CPU name logic in the driver and pass -march and -mcpu
flag information down from the Clang driver into the Gold linker plugin
for LTO. This allows specifying -march on the linker commandline and
should hopefully have it pass all the way through to the LTO optimizer.
Fixes PR14697.
Pull in r175919 from upstream clang trunk:
Driver: Pass down the -march setting down to -cc1as on x86 too.
The assembler historically didn't make use of any target features, but this has
changed when support for old CPUs that don't support long nops was added.
This should fix the long nops that still occurred in crt*.o, and
possibly other object files, if the system was compiled for a CPU that
does not support those, such as Geode.
Note that gcc on i386 also does not pass through any -march, -mcpu or
-mtune setting to gas, but this has not caused any trouble yet, because
gas defaults to i386.
jhb [Fri, 1 Mar 2013 16:18:40 +0000 (16:18 +0000)]
MFC 246035:
- Compute the correct size to reallocate when doubling the size of the
array of loaded objects to avoid a buffer overrun.
- Use reallocf() to avoid leaking memory if the realloc() fails.
jhb [Fri, 1 Mar 2013 14:54:26 +0000 (14:54 +0000)]
MFC 245577,245640:
Don't attempt to use clflush on the local APIC register window. Various
CPUs exhibit bad behavior if this is done (Intel Errata AAJ3, hangs on
Pentium-M, and trashing of the local APIC registers on a VIA C7). The
local APIC is implicitly mapped UC already via MTRRs, so the clflush isn't
necessary anyway.
jhb [Fri, 1 Mar 2013 03:04:57 +0000 (03:04 +0000)]
MFC 245823,245824,246210
- Use decimal values for UDP, TCP, and UNIX domain socket options rather
than hex to avoid implying that these constants should be treated as bit
masks.
- Add placeholder constants to reserve a portion of the socket option
name space for use by downstream vendors to add custom options.
jhb [Fri, 1 Mar 2013 01:02:28 +0000 (01:02 +0000)]
MFC 245610,245633,245635:
Include the thread name along with the command name when displaying the
command name of a thread from a multi-threaded process that doesn't have
an available argument list (such as kernel processes) and threads display
is enabled via -H.
jhb [Thu, 28 Feb 2013 21:57:38 +0000 (21:57 +0000)]
MFC 245508,245566,245568,245611,245909:
Various fixes to timestamps in NFS:
- Use the VA_UTIMES_NULL flag to detect when NULL was passed to utimes()
instead of comparing the desired time against the current time as a
heuristic.
- Remove unused nfs_curusec().
- Use vfs_timestamp() to set file timestamps rather than invoking
getmicrotime() or getnanotime() directly in NFS.
- Use NFSD_MONOSEC (which maps to time_uptime) instead of the seconds
portion of wall-time stamps to manage timeouts on events.
- Remove unused nd_starttime from the per-request structure in the new
NFS server.
- Use nanotime() for the modification time on a delegation to get as
precise a time as possible.
- Use time_second instead of extracting the second from a call to
getmicrotime().
jhb [Thu, 28 Feb 2013 21:24:10 +0000 (21:24 +0000)]
MFC 245238:
Add an option to not drop options from the third retransmitted SYN. If the
SYNs (or SYN/ACK replies) are dropped due to network congestion, then the
remote end of the connection may act as if options such as window scaling
are enabled but the local end will think they are not. This can result in
very slow data transfers in the case of window scaling disagreements.
Note that the unlike HEAD the existing behavior is preserved by default,
but it can be disabled by setting the
net.inet.tcp.rexmit_drop_options sysctl to zero.
jhb [Thu, 28 Feb 2013 19:00:57 +0000 (19:00 +0000)]
MFC 245476:
- More properly handle interrupted NFS requests on an interruptible mount
by returning an error of EINTR rather than EACCES.
- While here, bring back some (but not all) of the NFS RPC statistics lost
when krpc was committed.
jhb [Thu, 28 Feb 2013 18:58:37 +0000 (18:58 +0000)]
MFC 245471:
Do not require a filter-only interrupt handler for puc ports that are not
serial devices (such as printer ports). This allows ppc devices attached
to puc to correctly setup an interrupt handler and work.
jhb [Thu, 28 Feb 2013 18:49:31 +0000 (18:49 +0000)]
MFC 241748:
When checking to see if a video output's _ADR matches an entry in the
parent adapter's _DOD list, only check the low 16 bits of both _ADR and
_DOD. The language in the ACPI spec seems to indicate that the _ADR values
should exactly match the entries in _DOD. However, I assume that the
masking added to _DOD values was added to work around some known busted
machines (the commit history doesn't indicate either way), and the ACPI
spec does require that the low 16 bits are unique for all video outputs,
so only checking the low 16 bits should be fine.
This fixes recognition of video outputs that use the new standardized
device ID scheme in ACPI 3.0 that set bit 31 such as certain Dell laptops.
jhb [Thu, 28 Feb 2013 18:22:41 +0000 (18:22 +0000)]
MFC 241027:
- Re-shuffle the <machine/pc/bios.h> headers to move all kernel-specific
bits under #ifdef _KERNEL but leave definitions for various structures
defined by standards ($PIR table, SMAP entries, etc.) available to
userland.
- Consolidate duplicate SMBIOS table structure definitions in ipmi(4)
and smbios(4) in <machine/pc/bios.h> and make them available to
userland.
jhb [Thu, 28 Feb 2013 18:10:20 +0000 (18:10 +0000)]
MFC 240968:
Merge similar fixes from 223198 from igb to ixgbe:
- Use a dedicated task to handle deferred transmits from the if_transmit
method instead of reusing the existing per-queue interrupt task.
Reusing the per-queue interrupt task could result in both an interrupt
thread and the taskqueue thread trying to handle received packets on a
single queue resulting in out-of-order packet processing and lock
contention.
- Don't define ixgbe_start() at all when if_transmit is used.
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