environment needed at boot time to a dynamic subsystem when VM is
up. The dynamic kernel environment is protected by an sx lock.
This adds some new functions to manipulate the kernel environment :
freeenv(), setenv(), unsetenv() and testenv(). freeenv() has to be
called after every getenv() when you have finished using the string.
testenv() only tests if an environment variable is present, and
doesn't require a freeenv() call. setenv() and unsetenv() are self
explanatory.
The kenv(2) syscall exports these new functionalities to userland,
mainly for kenv(1).
Reviewed by: peter
statclock can access it in the tail end of statclock_process() at an
unfortunate time. This bit me several times on an SMP alpha (UP2000)
and the problem went away with this change. I'm not sure why it doesn't
break x86 as well. Maybe it's because the clocks are much faster
on alpha (HZ=1024 by default).
the tokens are legal ANSI-C. Maybe to enable 'op' to be a macro itself?
Anyway, with the ## concatenation Gcc 3.1's integrated `cpp' treats "=op("
as a single token vs. the three tokens it is.
where some client operations might be unexpectedly cancelled during
an unsuccessful non-forced unmount attempt. This causes problems
for amd(8), because it periodically attempts a non-forced unmount
to check if the filesystem is still in use.
Fix this by adding a new mountpoint flag MNTK_UNMOUNTF that is set
only during the operation of a forced unmount. Use this instead of
MNTK_UNMOUNT to trigger the cancellation of hung NFS operations.
Also correct a problem where dounmount() might inadvertently clear
the MNTK_UNMOUNT flag.
Reported by: simokawa
MFC after: 1 week
- Add stubs for EISA and SBUS cards.
(VME, FutureBUS, and TurboChannel stubs not provided.)
- Add infrastructure to build driver and bus front-end modules.
lun address modifier of sorts. Only an HP XP-512 seems to have cared.
Fix a few misplaced pointers for the new fabric goop, which has been
demonstrated to work on newer Brocades and McData switches now.
Put in commented out code which would run GFF_ID if the QLogic f/w
allowed it.
Don't whine about not being able to find a handle for a command if it
was a command aborted (by us).
- Use temporary variables to hold a pointer to a pgrp while we dink with it
while not holding either the associated proc lock or proctree_lock. It
is in theory possible that p->p_pgrp could change out from under us.
sx lock. Trying to get the lock order between these locks was getting
too complicated as the locking in wait1() was being fixed.
- leavepgrp() now requires an exclusive lock of proctree_lock to be held
when it is called.
- fixjobc() no longer gets a shared lock of proctree_lock now that it
requires an xlock be held by the caller.
- Locking notes in sys/proc.h are adjusted to note that everything that
used to be protected by the pgrpsess_lock is now protected by the
proctree_lock.
o move timeout from wihap_info to wihap_sta_info
o sprinkle spls into the code (need to use proper -current locking)
o better use of le16toh and htole16
o fix a few leaks m_freem(m)
o minor knf
o minor de-knf to match OpenBSD
o de__P
- Add a device_method_t array, fore_methods.
- Add a fore_ident_table that contains the various FORE Systems PCA-200
series devices.
- Rewrite of the fore_probe routine (formerly known as fore_pci_probe).
- Minor changes... mostly WIP stuff to get this updated... still much to
be done.
Gcc 3.1's 'cpp' vs. 2.95.3's. Maybe it is due to other code movement and
it just shows up weirdly in handling the .stab's. Anyway, w/o this change
building a kernel gives:
alpha/alpha/pal.s:75: relocation truncated to fit: REFLONG .text
alpha/alpha/prom_disp.s:67: relocation truncated to fit: REFLONG .text
the per-channel bus_addr_t offset. Also, cast the offset to (long long)
and use %#llx instead of %#x to fix printf warnings on architectures where
sizeof(bus_addr_t) != sizeof(int).
and pmap_copy_page(). This gets rid of a couple more physical addresses
in upper layers, with the eventual aim of supporting PAE and dealing with
the physical addressing mostly within pmap. (We will need either 64 bit
physical addresses or page indexes, possibly both depending on the
circumstances. Leaving this to pmap itself gives more flexibilitly.)
Reviewed by: jake
Tested on: i386, ia64 and (I believe) sparc64. (my alpha was hosed)
es137x.c: In function `es1371_rdcd':
es137x.c:598: warning: `x' might be used uninitialized in this function
PR: kern/35408
Submitted by: Thomas Quinot <thomas@cuivre.fr.eu.org>
Apply the change as a continuous slew rather than as a series of
discrete steps and make it possible to adjust arbitraryly huge
amounts of time in either direction.
In practice this is done by hooking into the same once-per-second
loop as the NTP PLL and setting a suitable frequency offset deducting
the amount slewed from the remainder. If the remaining delta is
larger than 1 second we slew at 5000PPM (5msec/sec), for a delta
less than a second we slew at 500PPM (500usec/sec) and for the last
one second period we will slew at whatever rate (less than 500PPM)
it takes to eliminate the delta entirely.
The old implementation stepped the clock a number of microseconds
every HZ to acheive the same effect, using the same rates of change.
Eliminate the global variables tickadj, tickdelta and timedelta and
their various use and initializations.
This removes the most significant obstacle to running timecounter and
NTP housekeeping from a timeout rather than hardclock.
that declares itself to be a disk, which may be the wrong thing to do in
the long term but it works well enough to attach to emulated disks in the
PowerPC simulator in gdb now that they have the proper device_type
property.
information related to bucket size effeciency. Three things are printed on
each row:
Size is the size the user actually asked for rounded to 16 bytes.
Requests is the number of times this size was asked for.
Real Size is the size we actually handed out.
At the end the total memory used and total waste is displayed. Currently my
system displays about 33% wasted memory.
The intent of this code is to gather statistics for tuning the malloc bucket
sizes. It is not intended to be run with INVARIANTS and it is not entirely
mp safe. It can be enabled via 'options MALLOC_PROFILE' which was commited
earlier.
Updated the kmemzones logic such that the ks_size bitmap can be used as an
index into it to report the size of the zone used.
Create the kern.malloc sysctl which replaces the kvm mechanism to report
similar data. This will provide an easy place for statistics aggregation if
malloc_type statistics become per cpu data.
Add some code ifdef'd under MALLOC_PROFILING to facilitate a tool for sizing
the malloc buckets.
trying to run X on some Athlon systems where the BIOS does odd things
(mines an ASUS A7A266, but it seems to also help on other systems).
Here's a description of the problem and my fix:
The problem with the old MTRR code is that it only expects
to find documented values in the bytes of MTRR registers.
To convert the MTRR byte into a FreeBSD "Memory Range Type"
(mrt) it uses the byte value and looks it up in an array.
If the value is not in range then the mrt value ends up
containing random junk.
This isn't an immediate problem. The mrt value is only used
later when rewriting the MTRR registers. When we finally
go to write a value back again, the function i686_mtrrtype()
searches for the junk value and returns -1 when it fails
to find it. This is converted to a byte (0xff) and written
back to the register, causing a GPF as 0xff is an illegal
value for a MTRR byte.
To work around this problem I've added a new mrt flag
MDF_UNKNOWN. We set this when we read a MTRR byte which
we do not understand. If we try to convert a MDF_UNKNOWN
back into a MTRR value, then the new function, i686_mrt2mtrr,
just returns the old value of the MTRR byte. This leaves
the memory range type unchanged.
I have seen one side effect of the fix, which is that ACPI calls
after X has been run seem to hang my machine. As running X would
previously panic the machine, this is still an improvement ;-)
I'd like to MFC this before the 4.6 code freeze - please let me
know if it causes any problems.
PR: 28418, 25958
Tested by: jkh, Christopher Masto <chris@netmonger.net>
MFC after: 2 weeks
trying to run X on some Athlon systems where the BIOS does odd things
(mines an ASUS A7A266, but it seems to also help on other systems).
Here's a description of the problem and my fix:
The problem with the old MTRR code is that it only expects
to find documented values in the bytes of MTRR registers.
To convert the MTRR byte into a FreeBSD "Memory Range Type"
(mrt) it uses the byte value and looks it up in an array.
If the value is not in range then the mrt value ends up
containing random junk.
This isn't an immediate problem. The mrt value is only used
later when rewriting the MTRR registers. When we finally
go to write a value back again, the function i686_mtrrtype()
searches for the junk value and returns -1 when it fails
to find it. This is converted to a byte (0xff) and written
back to the register, causing a GPF as 0xff is an illegal
value for a MTRR byte.
To work around this problem I've added a new mrt flag
MDF_UNKNOWN. We set this when we read a MTRR byte which
we do not understand. If we try to convert a MDF_UNKNOWN
back into a MTRR value, then the new function, i686_mrt2mtrr,
just returns the old value of the MTRR byte. This leaves
the memory range type unchanged.
I'd like to merge this before the 4.6 code freeze, so if people
can test this with XFree 4 that would be very useful.
PR: 28418, 25958
Tested by: jkh, Christopher Masto <chris@netmonger.net>
MFC after: 2 weeks
exhausting the kernel timeout table. Perform the usual gymnastics to
avoid race conditions between node shutdown and timeouts occurring.
Also fix a bug in handling ack delays < PPTP_MIN_ACK_DELAY. Before,
we were ack'ing immediately. Instead, just impose a minimum ack delay
time, like the name of the macro implies.
MFC after: 1 week
hash while holding the lock on a zone. Fix this by doing the allocation
seperately from the actual hash expansion.
The lock is dropped before the allocation and reacquired before the expansion.
The expansion code checks to see if we lost the race and frees the new hash
if we do. We really never will lose this race because the hash expansion is
single threaded via the timeout mechanism.
The extra microphone channel capability is part of the "normal" ac97
capabilities and not an extended ac97 capability. Now recording on
codecs without a seperate mic channel works.
MFC after: 1 week
o Use chunk instead of region when we talk about a memory range.
Region can be confused with region register and we already
call it chunk in machdep.c
o Update the twiddle every 16MB
Fortunately we have no large zones with maximums specified yet, so it wasn't
breaking anything.
Implement blocking when a zone exceeds the maximum and M_WAITOK is specified.
Previously this just failed like the old zone allocator did. The old zone
allocator didn't support WAITOK/NOWAIT though so we should do what we
advertise.
While I was in there I cleaned up some more zalloc logic to further simplify
that code path and reduce redundant code. This was needed to make the blocking
work properly anyway.
we can use td_ucred.
- In killpg1(), the proc lock is sufficient to check if p_stat is SZOMB
or not. We don't need sched_lock.
- Close some races in psignal(). In psignal() there is a big switch
statement based on p_stat. All the different cases are assuming that
the process (or thread) isn't going to change state out from under it.
To ensure this is true, just lock sched_lock for the entire switch. We
practically held it the entire time already anyways. This also
simplifies the locking somewhat and actually results in fewer lock
operations.
- Allow signotify() to be called with the sched_lock held since psignal()
now does that.
- Use td_ucred in a couple of places.
process so it can use td_ucred.
- Require the target process of donice() to be locked when donice() is
called.
- Use td_ucred.
- Lock the target process of p_cansee() and while reading the credentials
of a process.
- Change the logic of rtprio() slightly so it does it's copyin() if needed
prior to locking the target process.
- rtprio() no longer needs Giant. In theory with full KSE it would still
need Giant to protect p_ucred of curproc for the p_canfoo() functions
but p_canfoo() will be changing to using td_ucred of curthread before
full KSE hits the tree.
of a process pointer.
- Move the p_candebug() at the start of procfs_control() a bit to make
locking feasible. We still perform the access check before doing
anything, we just now perform it after acquiring locks.
- Don't lock the sched_lock for TRACE_WAIT_P() and when checking to see if
p_stat is SSTOP. We lock the process while setting p_stat to SSTOP
so locking the process is sufficient to do a read to see if p_stat is
SSTOP or not.
allocate a blank cred first, lock the process, perform checks on the
old process credential, copy the old process credential into the new
blank credential, modify the new credential, update the process
credential pointer, unlock the process, and cleanup rather than trying
to allocate a new credential after performing the checks on the old
credential.
- Cleanup _setugid() a little bit.
- setlogin() doesn't need Giant thanks to pgrp/session locking and
td_ucred.
FIFO or the in-RAM descriptors it will switch to RX_IDLE from where it
is not restarted.
We used to deal with RX_IDLE by doing a total reinit but this lost
our link and caused a potential 30sec autonegotiation against
switches. This was changed to a less heavyhanded approach, but this
failed to restart the receiver it it were in the RX_IDLE state.
This change adds the RX_IDLE and the RX_FIFO_OFLOW conditions as
triggers for interrupts and receive side processing, and restarts
the receiver when it is RX_IDLE.
Remove the #ifdef notyet'ed nge_rxeoc() function.
Sponsored by: Cybercity Internet, Denmark.
MFC after: 7 days
and acquire the proctree_lock if needed first. Then we lock the process
if necessary and fiddle with it as appropriate. Finally we drop locks and
do any needed copyout's. This greatly simplifies the locking.
belong to a user virtual address; while this happens to work on some
architectures, it can't on sparc64, since user and kernel virtual
address spaces overlap there (the distinction between them is done via
separate address space identifiers).
Instead, look up the page in the vm_map of the process in question.
Reviewed by: jake
(apparently by markus@, at least committed by him). This has the
advantage of not using the bad IV's from Fluhrer/Mantin/Shamir as well
as bringing the drivers a little closer together.
Also use a few constants in place of magic numbers in one place.
Obtained from: OpenBSD 1.25, 1.28, 1.36, 1.38, 1.42
time we tell CAM to rescan the bus. Together with the previous patch
this should avoid the problem where the devices would wedge because they
got spoken to over two different pipes.
Tested by: Tomas Pluskal <plusik@pohoda.cz>
up the module_path string, we would walk one past the end of the buffer.
This hurting ia64 originally, but it was probably also happening on i386
occasionally as well. The effects were usually harmless, it would add
bogus "binary" search directories to the places it actually looked for
files.
the S_IFREG bit for regular files. This caused the path search code to
skip it when it finally did find the kernel (after the common/module.c
buffer overrun bug was fixed)
wrote. This code was for 4.5-release, so I've ported it to -current
and made a few minor tweaks. The biggest non-style tweak was to not
make access point the default.
More changes will be needed to get this actually working, but I wanted
to get a relatively pure baseline. This doesn't seem to break what
works now.
the same thing as the SMC 1211, but with their own vendor ID.
Update the device list to support this NIC. (Discovered these
cards lying around the lab at work.)
the indentation more like the other multi-line assembley in
this file.
Someone who understands gcc constraints could update the
constraints for do_cpuid.
o Recent changes to osigreturn() and sigreturn() have made them MPSAFE. Add
a comment to this effect.
Submitted by: bde (bullet #1)
Reviewed by: jhb (bullet #2)
without a few patches for the rest of the kernel to allow the image
activator to override exec_copyout_strings and setregs.
None of the syscall argument translation has been done. Possibly, this
translation layer can be shared with any platform that wants to support
running ILP32 binaries on an LP64 host (e.g. sparc32 binaries?)
to be sure that it is always correct and this was not true for the first
call to cpu_switch. When thread0 resumed later, it ended up calling
pmap_install with a null pmap, which is bad.
_BYTE_ORDER. These are far more useful than their non-underscored
equivalents as these can be used in restricted namespace environments.
Mark the non-underscored variants as deprecated.
attachment after boot in some cases where the device gets confused if
spoken to over two different pipes simultaneously (resulting in TIMEOUT
errors on requesting INQUIRY data).
This solution is far from perfect, as after umass_attach has returned
the USB stack fetches the string descriptors in order for creating the
event that is sent to userland. It just makes the chances of collisions
less likely.
Tested by: Tomas Pluskal <plusik@pohoda.cz>
This hack turns out to be a bad idea. Many auto configuration scripts
will #include a bunch of system headers, run it through cpp and then
grep/sed to see if there was really a prototype. The regular
expressions that are used to test this didn't accept all possible
legal ANSI-C prototypes. In particular, they didn't accept the ()
around ioctl. Several different programs do this, so eliminating the
parans will keep FreeBSD maximally compatible with other systems.
Appologies to: obrien (he was right in the end)
This potentally breaks some ports (and fixes vim and others that
haven't been fixed to deal with the parens).
so it can use td_ucred.
- Push Giant down into the end of settime() where we actually set the time
on the timecounter and time of day clock.
- Remove Giant from clock_settime().
- Push Giant down in settimeofday() to just protect the 'tz' global
variable.
submitter, this permits Russian (and probably other locales') characters
to be entered via watch(8).
PR: 35636
Submitted by: Gleb Smirnoff <glebius@rinet.ru>
the card for command completion.
digi_delay() uses either tsleep() or DELAY() depending on the value of
``cold''.
Pointed in the right direction by: jhb
calling ioctl(SIOC[AS]IFADDR).
This allows the following:
ifconfig xx0 inet 1.2.3.1 netmask 0xffffff00
ifconfig xx0 inet 1.2.3.17 netmask 0xfffffff0 alias
ifconfig xx0 inet 1.2.3.25 netmask 0xfffffff8 alias
ifconfig xx0 inet 1.2.3.26 netmask 0xffffffff alias
but would (given the above) reject this:
ifconfig xx0 inet 1.2.3.27 netmask 0xfffffff8 alias
due to the conflicting netmasks. I would assert that it's wrong
to mask the EEXIST returned from rtinit() as in the above scenario, the
deletion of the 1.2.3.25 address will leave the 1.2.3.27 address
as unroutable as it was in the first place.
Offered for review on: -arch, -net
Discussed with: stephen macmanus <stephenm@bayarea.net>
MFC after: 3 weeks
This change allows bootp to work with more than one interface, at the
expense of some rather ``wrong'' looking code. I plan to MFC this in
place of luigi's recent #ifdef BOOTP stuff that was committed to this
file in -stable, as that's slightly more wrong that this is.
Offered for review on: -arch, -net
MFC after: 2 weeks
Add the card name to the error message for the first initialisation
failure, giving us more info about what was actually discovered.
This code has been tested by Robert Suetterlin <robert@mpe.mpg.de>
to work on a PCI Xem card.
linker_search_module().
Without this, modules loaded from loader.conf that then try to load
in additional modules (such as digi.ko loading a card's BIOS) die
badly in the vn_open() called from linker_search_module().
It may be worth checking (KASSERTing?) that rootdev != NODEV in
vn_open() too.
mod_depend * (which may be NULL). The only consumer of this
function at the moment is digi_loadmoduledata(), and that passes
a NULL mod_depend *.
In linker_reference_module(), check to see if we've already got
the required module loaded. If we have, bump the reference count
and return that, otherwise continue the module search as normal.
is called.
- Change sysctl_out_proc() to require that the process is locked when it
is called and to drop the lock before it returns. If this proves too
complex we can change sysctl_out_proc() to simply acquire the lock at
the very end and have the calling code drop the lock right after it
returns.
- Lock the process we are going to export before the p_cansee() in the
loop in sysctl_kern_proc() and hold the lock until we call
sysctl_out_proc().
- Don't call p_cansee() on the process about to be exported twice in
the aforementioned loop.
p_pgrp since the pgrp locking went in. We also don't need it to check for
invalid values in the options argument to wait1(), so push Giant down
slightly.
drivers with MI portions into the MI notes. Device drivers such as busses
like the isa, eisa, and pci devices are now in the MD NOTES section even
though they have some MI code. This will ensure that only the proper bits
of device drivers will be included due to the optional bits dependent on
the busses in sys/conf/files. This commit also takes the stance that since
hints are ignored in NOTES anyways, it is ok to include hints for a bus
that may not be present.
Advice from: bde
behavior by default. Also, change the options line to reflect this.
If there are no problems reported this will become the only behavior and the
knob will be removed in a month or so.
Demanded by: obrien
While it may have allowed the XFree86 4 port to build; it killed TONS
of other ports. The XFree86 4 can be patched to not use its macro a lot
easier than figuring how to deal with 1000 other now-broken ports.
and add some compatibility defines. Add fields for ins and locals to
struct reg also for the same reason; these aren't filled in yet because
getting at those registers sucks and I'd rather not save them in the
trapframe just for this. Reorder struct reg to be ABI compatible as
well. Add needed include of machine/emul.h.
This gets pmdb (poor man's debugger) from OpenBSD mostly compiling but it
doesn't work yet :(
newer ultras and probably other sun machines. This is a pretty decent
chip with 32 byte read and write fifos and support for many higher baud
rates. It supports hdlc and sdlc as well as asynchronoue serial, but the
goal here is just decent serial console support for the sparc64 port, so
these modes are not expected to be supported. So far this only has support
for the low level routines used by kernel printf and thus ddb over serial,
a character device which can be used for login consoles has not yet been
written.
3.The only thing worse than generalizing from one example
is generalizing from no examples at all.
Remove the fwcylinders attribute before anybody gets the idea that we
alone have squared the circle.
Sponsored by: DARPA & NAI Labs.
didn't like the wait argument and that if you were removing a zone it had
better be empty.
Also, I broke out part of hash_expand and made a seperate hash_free() for use
in uma_zdestroy.
never held across blocking operations. Also, fix two other lock order
reversals that were exposed by jhb's witness change.
The free path previously had a bug that would cause it to skip the free bucket
list in some cases and go straight to allocating a new bucket. This has been
fixed as well.
These changes made the bucket handling code much cleaner and removed quite a
few lock operations. This should be marginally faster now.
It is now possible to call malloc w/o Giant and avoid any witness warnings.
This still isn't entirely safe though because malloc_type statistics are not
protected by any lock.
