we convert ip_len into a network byte order; in_delayed_cksum() still
expects it in host byte order.
The symtom was the ``in_cksum_skip: out of data by %d'' complaints
from the kernel.
To add to the previous commit log. These fixes make tcpdump(1) happy
by not complaining about UDP/TCP checksum being bad for looped back
IP multicast when multicast router is deactivated.
Reported by: Vsevolod Lobko
a callout, and use the new callout_drain API to make sure that a callout
has finished before we deallocate memory it is using.
PR: kern/64121
Discussed with: gallatin
license, per letter dated July 22, 1999 and irc message from Robert
Watson saying that clause 3 can be removed from those files with an
NAI copyright that also have only a University of California
copyrights.
Approved by: core, rwatson
callout_stop(), except that if the callout being stopped is currently
in progress, it blocks attempts to reset the callout and waits until the
callout is completed before it returns.
This makes it possible to clean up callout-using code safely, e.g.,
without potentially freeing memory which is still being used by a callout.
Reviewed by: mux, gallatin, rwatson, jhb
count is protected by the mutex that protects the condition, so the count
does not require any extra locking or atomic operations. It serves as an
optimization to avoid calling into the sleepqueue code at all if there are
no waiters.
Note that the count can get temporarily out of sync when threads sleeping
on a condition variable time out or are aborted. However, it doesn't hurt
to call the sleepqueue code for either a signal or a broadcast when there
are no waiters, and the count is never out of sync in the opposite
direction unless we have more than INT_MAX sleeping threads.
to awaken all waiters when a contested mutex is released instead of just
the highest priority waiter. If the various threads are awakened in
sequence then each thread may acquire and release the lock in question
without contention resulting in fewer expensive unlock and lock
operations. This old behavior of waking just the highest priority is
still used if this option is specified. Making the algorithm conditional
on a kernel option will allows us to benchmark both cases later and
determine which one should be used by default.
Requested by: tanimura-san
more consistent with other APIs. sleepq and cv's use signal/broadcast, and
msleep uses wakeup_one/wakeup. Prior to this turnstiles were using a
signal/wakeup mixture.
to implement this mistake.
Fixed some nearby style bugs (initialization in declaration, misformatting
of this initialization, missing blank line after the declaration, and
comparision of the non-boolean result of the initialization with 0 using
"!". In KNF, "!" is not even used to compare booleans with 0).
- don't say what a small subset of the options includes are for.
- don't mark up functions which use all their args with /* ARGSUSED */.
The markup should have been removed when the unused retval parameter
was removed.
- don't comment on what routine suser() checks do. Removed nearby
excessive vertical whitespace.
While here, begin fixing dependencies of <sys/mount.h> on normal namespace
pollution (__BSD_VISIBLE) by not using u_int in the prototype for nmount(2),
although it is used in the man page.
While there, begin cleaning up another set of prototypes:
- use u_int in the prototype for the kernel part of nmount().
- consistently don't use parameter names in prototypes in the
"exported vnode operations" set of prototypes, although style(9) says to
use names in the kernel.
status registers for error conditions and updating statistics
when there are cycles left (inspired by the nge(4) driver).
- Removed the TX list counter and the producer/consumer gap; it's
enough to just ensure we don't reuse the last (free) descriptor,
as the chip may not have read its next pointer yet. If we reuse
it, the TX may stall under a heavy TX load with polling enabled.
- Dropped code to recharge the watchdog timer, it's pointless; the
watchdog routine will re-init the chip and both RX and TX lists.
For now, preserve the gif_called functionality to limit the nesting
level because uncontrolled nesting can easily cause the kernel stack
exhaustion. Rumors are it should be shot to allow people to easily
shoot themselves in the foot, but I have ran out of cartridges. ;)
case we should wait for the resetdone handler to be called before
returning.
- When providing resources via ndis_query_resources(), uses the
computed rsclen when using bcopy() to copy out the resource data
rather than the caller-supplied buffer length.
- Avoid using ndis_reset_nic() in if_ndis.c unless we really need
to reset the NIC because of a problem.
- Allow interrupts to be fielded during ndis_attach(), at least
as far as allowing ndis_isr() and ndis_intrhand() to run.
- Use ndis_80211_rates_ex when probing for supported rates. Technically,
this isn't supposed to work since, although Microsoft added the extended
rate structure with the NDIS 5.1 update, the spec still says that
the OID_802_11_SUPPORTED_RATES OID uses ndis_80211_rates. In spite of
this, it appears some drivers use it anyway.
- When adding in our guessed rates, check to see if they already exist
so that we avoid any duplicates.
- Add a printf() to ndis_open_file() that alerts the user when a
driver attempts to open a file under /compat/ndis.
With these changes, I can get the driver for the SMC 2802W 54g PCI
card to load and run. This board uses a Prism54G chip. Note that in
order for this driver to work, you must place the supplied smc2802w.arm
firmware image under /compat/ndis. (The firmware is not resident on
the device.)
Note that this should also allow the 3Com 3CRWE154G72 card to work
as well; as far as I can tell, these cards also use a Prism54G chip.
without the (defunct) isa compatibility shims. The new-bus-specific
parts are very similar to the ones for the pci probe and attach.
This was held up too long waiting for a repo copy to src/sys/dev/cy,
so I decided to fix the files in their old place. This gives easier
to read and merge diffs anyway.
The "count" line in src/sys/conf/files won't be changed until after
the repo copy, so old kernel configs that specify a count need not be
(and must not be) changed until then. The count is just ignored in
the driver. One unfinished detail is dynamic allocation of arrays
with <count> and (<count> * 32) entries, and iteration over the arrays.
This is now kludged with a fixed count of 10 (up to 10 cards with up
to 32 ports each).
Prodded by: imp
Submitted by: mostly by imp
Approved by: imp
common attach function so that the lock gets initialized in all cases.
This fixes breakage of the initialization of the lock in the pci case
in rev.1.135 (between the releases of 5.1 and 5.2). The lock is only
used in the SMP case, so this bug was not always fatal.
vm_mmap_vnode function, where we can safely check for a special /dev/zero
case. Rev. 1.180 has reordered checks and introduced a regression.
Submitted by: alc
Was broken by: kan
and used by uart(4) for the channel conflicted with the port offset for
the Z8530. The Z8530 has the channels reversed (i.e. channel B is at
offset 0 and channel A is at offset 4). Assign the port offsets in the
right order so that uart(4) will properly attach to the channels.
Submitted by: Marius Strobl <marius@alchemy.franken.de>
It was fixed by moving problemetic checks, as well as checks that
doesn't need locking before locks are acquired.
Submitted by: Ryan Sommers <ryans@gamersimpact.com>
In co-operation with: cperciva, maxim, mlaier, sam
Tested by: submitter (previous patch), me (current patch)
Reviewed by: cperciva, mlaier (previous patch), sam (current patch)
Approved by: sam
Dedicated to: enough!
SCHED_INTERACT_MAX was used where SCHED_SLP_RUN_MAX was needed. This was
causing the interactivity scaler to lose history at a more dramatic rate
than intended.
scenario into #ifdef DEBUG. This makes my cluster with Belkin
KVM switch completely usable, even if the KVM switch and mouse
get a bit confused sometimes.
Without this, when the mouse gets confused, all sorts of crud
gets spammed all over the screen. With this, the mouse may appear
dead for a second or three, but it recovers silently.
phandle_t. Since both are typedefed to unsigned int, this is more
or less cosmetic.
- Fix the code that determines whether a creator instance was used
for firmware output (and should not be blanked on initialization).
Since r1.2 of dev/fb/creator.c, this consisted comparing a handle of
an instance of a package with a handle of the package itself.
Use the test from r1.1, which utilizes OF_instance_to_package().
Submitted by: Marius Strobl <marius@alchemy.franken.de>
+ struct ifnet: remove unused fields, move ipv6-related field close
to each other, add a pointer to l3<->l2 translation tables (arp,nd6,
etc.) for future use.
+ struct route: remove an unused field, move close to each
other some fields that might likely go away in the future
"...If "keyboard" is the selected input-device and "screen" the
output-device (both via /options) but the keyboard is unplugged,
OF automatically switches to ttya for the console, it even prints
a line telling so on "screen". Solaris respects this behaviour and
uses ttya as the console in this case and people probably expect
FreeBSD to do the same (it's also very handy to temporarily switch
consoles)..."
"...I changed the comparison of the console device with "ttya" ||
"ttyb" to "tty" because on AXe boards all 4 onboard UARTs end in
SUB-D connectors (ttya and ttyb being 16550 and ttyc and ttyd a
SAB82532) and there's no Sun keyboard connector (but PS/2). If one
plugs a serial card in a box there also can be more than just ttya
and ttyb available for a console..."
Submitted by: Marius Strobl <marius@alchemy.franken.de>
Has no doubt that the change is correct: marcel
"... uart_cpu_sparc64.c currently only looks at /options if ttyX is
the selected console. However, there's one case where it should
additionally look at /chosen. If "keyboard" is the selected input-
device and "screen" the output-device (both via /options) but the
keyboard is unplugged, OF automatically switches to ttya for the
console. It even prints a line telling so on "screen". Solaris
respects this behaviour and uses ttya as the console in this case
and people probably expect FreeBSD to do the same (it's also very
handy to temporarily switch consoles)..."
Submitted by: Marius Strobl <marius@alchemy.franken.de>
Has no doubt the change is correct: marcel
WARNS=6. I don't change the WARNS level in the Makefile because I
didn't tested this on other archs.
The fs.h fix was suggested by: marcel
Reviewed by: md5(1)
of UARTs. We already did this in uart_cpu_getdev().
While here, also check the compat name for "su" or "su16550".
Both changes submitted by: Marius Strobl <marius@alchemy.franken.de>
Does not doubt the correctness of the second change: marcel
it belongs. Change the implementation to match those of rfs() and
rgs() for consistency and irrespective of whether the original was
more correct or not (technically speaking).
in the process. This is required for proper debugging of corefiles
created by 1:1 or M:N threaded processes. Add an XXX comment where
we should actually call a function that dumps MD specific notes.
An example of a MD specific note is the NT_PRXFPREG note for SSE
registers.
Since BFD creates non-annotated pseudo-sections for the first PRSTATUS
and FPREGSET notes (non-annotated in the sense that the name of the
section does not contain the pid/tid), make sure those sections describe
the initial thread of the process (i.e. the thread which tid equals the
pid). This is not strictly necessary, but makes sure that tools that use
the non-annotated section names will not change behaviour due to this
change.
The practical upshot of this all is that one can see the threads in
the debugger when looking at a corefile. For 1:1 threading this means
that *all* threads are visible.
NFSv3. It's likely that modifying the attributes will affect the
file's accessibility. This version of the patch is one suggested
by Ian Dowse after reviewing my original attempt in the PR
Reviewed By: iedowse
PR: kern/44336
MFC after: 3 days
is twofold:
1. When a 1:1 or M:N threaded process dumps core, we need to put the
register state of each of its kernel threads in the core file.
This can only be done by differentiating the pid field in the
respective note. For this we need the tid.
2. When thread support is present for remote debugging the kernel
with gdb(1), threads need to be identified by an integer due to
limitations in the remote protocol. This requires having a tid.
To minimize the impact of having thread IDs, threads that are created
as part of a fork (i.e. the initial thread in a process) will inherit
the process ID (i.e. tid=pid). Subsequent threads will have IDs larger
than PID_MAX to avoid interference with the pid allocation algorithm.
The assignment of tids is handled by thread_new_tid().
The thread ID allocation algorithm has been written with 3 assumptions
in mind:
1. IDs need to be created as fast a possible,
2. Reuse of IDs may happen instantaneously,
3. Someone else will write a better algorithm.
Add in missing case for i845G in the attach routine. I'll MFC this
with the rest of the change after the 4.10 codefreeze lifts.
Reviewed By: Doug Rabson
Under polling(4), we counted non-existent output packets and wasted
CPU cycles, corrected. (PR kern/64975.)
The fix in revision 1.71 to correct resetting of the watchdog timer
was wrong.
In rl(4), the TX list does not have a gap between the consumer and
producer, so the "empty TX list" test was wrong, corrected.
Also, resetting the timer to five each time we know there is still
some TX work to do was a bad idea -- under polling(4), if the chip
goes out to lunch, this results in the watchdog routine to _never_
be called. Instead, let the timer downgrade to zero and fire the
watchdog, then reset it to five when it is zero AND there is some
TX work left. (Most other network drivers need this fix too.)
MFC after: 3 days
Moved the RX ring resyncing code to ste_rxeoc(), and only run it
if we were asked to POLL_AND_CHECK_STATUS, under DEVICE_POLLING.
(This significantly reduces the CPU load.)
Improved the RX ring resyncing code by re-checking if the head
is still empty before doing resyncing. This mostly affects the
DEVICE_POLLING mode, where we run this code periodically. We
could start checking with an empty head (well, an empty ring
even), and after doing a few iterations, the chip might write
a few entries, including the head, and we would bogusly consider
this case as requiring resyncing. On a test box, this reduced
the number of resyncs done by a factor of 10.
In ste_txeof(sc), only reset the watchdog timer to zero when
the TX list is completely empty.
Converted ste_tx_prev_idx to a pointer -- faster.
Removed some bitrot.
refcnt on the node but left it in the node table. This allows the node table
to hold the results of scanned ap's but for ibss scans left nodes w/o any
driver-private state setup and/or a bad refcnt (when the nodes were timed
out they were prematurely discarded). Now we treat nodes identified for ap
scanning as before but force nodes discovered when scanning for ibss neighbors
to have complete/proper state and hold the refcnt on the node. Any other
nodes created because of these frames are discarded directly (need to optimize
this case to eliminate various work that's immediately discarded).
o remove IEEE80211_C_RCVMGT capability
o on transmit craft new nodes as needed using new ieee80211_find_txnode routine
o add ieee80211_find_txnode routine to lookup a node by mac address and
if not present create one when operating in ibss/ahdemo mode; new nodes
are dup'd from bss and the driver is told to treat the node as if a new
association has been created so driver-private state (e.g. rate control
handling) is setup
Obtained from: netbsd (basic idea)
blindy copying the node contents; this turns out to be a bad idea as we
add more state in the node for things like WPA
o track node allocation failures in ieee80211_dup_bss instead of the callers
Obtained from: madwifi
on architectures that need to call cninit() before the machine is
ready to support mutexes (required by make_dev()).
- Remove make_dev() call from scinit() when flags indicate
unit is the system console, rely on sc_attach_unit() to
handle it.
- When trying to access current screen's status (scr_stat
structure) use the static one provided for the initial
system console if no dev_t is available.
- When calling make_dev() in sc_attach_unit() catch special
case of system's initial console and set up dev_t structure
to include pointer to console's scr_stat struct.
Reviewed by: marcel
Tested by: marcel, grehan (ppc), others on current@
Approved by: rwatson (mentor)
- ptrace_single_step() is no longer called with the proc lock held, so
don't try to unlock it and then relock it.
- Push Giant down into proc_rwmem() instead of forcing all the consumers
(including Alpha breakpoint support) to explicitly wrap calls to
proc_rwmem() with Giant.
Tested by: kensmith
not quite well by me - if kern.ps_argsopen was set to 0, users weren't
permitted to see arguments of even own processes.
But kern.ps_argsopen is going away, so just remove this check and leave
security checks for p_cansee() function.
1. This check if wrong, because it is true by default
(kern.ps_argsopen is 1 by default) (p_cansee() is not even checked).
2. Sysctl kern.ps_argsopen is going away.
completely understand], md_takeroot() runs before md_preloaded(),
rendering both useless.
As a fix, move the body (effectively one line!) of md_takeroot()
into md_preloaded(), and get rid of the stuff that has become useless.
Bug and fix reported 10 days ago on -current, no reply.
the driver's RX ring head may fall behind the chip, causing the
stuck traffic, disordered packets, etc. Work around this by
adopting the technique of resyncing RX head used in dc(4) and
xl(4) drivers, but do it in a slightly different place to reduce
the number of resyncs needed.
Also, set the NIC's RX polling period to a more meaningful value,
to stop overloading the PCI bus (this also reduces the number of
resyncs by a factor of 3 or more in a long run; the actual number
is very dependent on a nature of the traffic).
Maintain the statistics counter as the hw.ste_rxsyncs sysctl.
In cooperation with: Vsevolod Lobko
OK'ed by: ambrisko
MFC after: 5 days
they all do and handle that without alarming the user. Also pull in a bit
of defensive code from OpenBSD that triggers when a card is recognised but
not properly classified as either Genesis or Yukon. Not that I could ever
have needed this. :-)
Obtained from: OpenBSD/NetBSD (partially)
MFC after: 2 weeks
not ~1, but the call has been switched over to bus_alloc_resource_any()
which has the same effect.
Submitted by: Suleiman Souhlal <refugee@segfaulted.com>
declaration. Observe that initialization in declaration is
frequently incompatible with locking, not just a bad idea
due to style(9).
Submitted by: bde
and consume that interface in portalfs and fifofs instead. In the
new world order, unp_connect2() assumes that the unpcb mutex is
held, whereas uipc_connect2() validates that the passed sockets are
UNIX domain sockets, then grabs the mutex.
NB: the portalfs and fifofs code gets down and dirty with UNIX domain
sockets. Maybe this is a bad thing.
read-only. Need to enable "legacy support", by poking
into pci config space. (comment from the patch)
Submited by: Autrijus Tang <autrijus@autrijus.org>
Approved by: tanimura (mentor)
No functional change, the previous ste_encap() was correct WRT
long mbuf chains; this just reduces code duplication.
MFC after: 3 days
Prodded by: ambrisko
#ifdefs in order to loop it back to OpenBSD after the next import. There are
a some implicit asserts involved which might be better spelled out
explicitly (af == AF_INET ...)
Approved by: bms(mentor)
is necessary because some IBMs use recursive methods (pointed out by
Robert Moore from Intel). The latter was a typo on my part. It was disabled
by default when it should have been enabled.
stuff was here (NFS) was fixed by Alfred in November. The only remaining
consumer of the stub functions was umapfs, which is horribly horribly
broken. It has missed out on about the last 5 years worth of maintenence
that was done on nullfs (from which umapfs is derived). It needs major
work to bring it up to date with the vnode locking protocol. umapfs really
needs to find a caretaker to bring it into the 21st century.
Functions GC'ed:
vop_noislocked, vop_nolock, vop_nounlock, vop_sharedlock.
- Add tun_mtx to tun_softc. Annotate what is (and isn't) locked by it.
- Lock down tun_flags, tun_pid.
- In the output path, cache the value of tun_flags so it's consistent
when processing a particular packet rather than re-reading the field.
- In general, use unlocked reads for debugging.
- Annotate a couple of places where additional unlocked reads may be
possible.
- Annotate that tun_pid is used as a bug in tunopen().
if_tun is now largely MPSAFE, although questions remain about some of
the cdevsw fields and how they are synchronized.
other pseudo-interfaces, break out tear-down of a softc into a
separate tun_destroy() function, and invoke that from the module
unloader. Hold tunmtx across manipulations of the global softc list.
