include file, and include this where the previous duplicate definitions were.
Static program checkers like FlexeLint rightfully take a dim view of
duplicate definitions, even if they currently are identical.
Such situation is not supported.
This problem was triggered by something like this:
# zpool create tank da0
# zfs snapshot tank@snap
# cd /tank/.zfs/snapshot/snap (this will mount the snapshot)
# cd
# mount -u nosuid /tank/.zfs/snapshot/snap (refcount leak)
# zpool export tank
cannot export 'tank': pool is busy
MFC after: 1 week
It will be checked any way later by g_io_check() in g_io_schedule_down().
It is only needed here to not trigger panic from additional check, when
INVARIANTS enabled. So cover it with #ifdef INVARIANTS. It saves two
64bit divisions per request.
we will fail to unmount it, but it won't be removed from the tree,
so in that case there is no need to reinsert it.
This fixes a panic reproducable in the following steps:
# zfs create tank/foo
# zfs snapshot tank/foo@snap
# cd /tank/foo/.zfs/snapshot/snap
# umount /tank/foo
panic: avl_find() succeeded inside avl_add()
Reported by: trasz
MFC after: 3 days
does a KASSERT that the group address is multicast, so the
check if this is indeed true and eventually return a EINVAL if not,
should be done before calling inp_lookup_mcast_ifp. This fixes a kernel
crash when calling setsockopt (sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,...)
with invalid group address.
Reviewed by: bms
Approved by: bms
MFC after: 3 days
provider is closed should be ok.
When administrator requests to change ZVOL size do it immediately if ZVOL
is closed or do it on last ZVOL close.
PR: kern/136942
Requested by: Bernard Buri <bsd@ask-us.at>
MFC after: 1 week
never been inserted into the pfs_vncache list. Since pfs_vncache_free()
does not anticipate this case, it decrements pfs_vncache_entries
unconditionally; if the vnode was not in the list, pfs_vncache_entries
will no longer reflect the actual number of list entries. This may cause
size of the cache to exceed the configured maximum. It may also trigger
a panic during module unload or system shutdown.
Do not decrement pfs_vncache_entries for the vnode that was not in the
list.
Submitted by: tegge
Reviewed by: des
MFC after: 1 week
dead_vnodeops before calling vgone(). Revert r189706 and corresponding
part of the r186560.
Noted and reviewed by: tegge
Approved by: des (pseudofs part)
MFC after: 3 days
Remove msleep() timeout from g_io_schedule_up/down(). It works fine
without it, saving few percents of CPU on high request rates without
need to rearm callout twice per request.
requirements. It is busdma task, to manage proper alignment by loading
data to bounce buffers.
PR: kern/127316
Reviewed by: current@
Tested by: Ryan Rogers
vn_start_write(NULL, &mp) from operating on potentially freed or reused
struct mount *.
Remove unmatched vfs_rel() in cleanup.
Noted and reviewed by: tegge
Tested by: pho
MFC after: 3 days
Now that pty(4) is a loadable kernel module, I'd better move /dev/ptmx
in there as well. This means that pty(4) now provides almost all
pseudo-terminal compatibility code. This means it's very easy to test
whether applications use the proper library interfaces when allocating
pseudo-terminals (namely posix_openpt and openpty).
scenario where an anycast address is assigned on one interface,
and a global address with the same scope is assigned on another
interface. In other words, the interface owns the anycast
address has only the link-local address as one other address.
Without this patch, "ping6" the anycast address from another
station will observe the source address of the returned ICMP6
echo reply has the link-local address, not the global address
that exists on the other interface in the same node.
Reviewed by: bz
MFC after: immediately
- Interface link-local address is not reachable within the
node that owns the interface, this is due to the mismatch
in address scope as the result of the installed interface
address loopback route. Therefore for each interface
address loopback route, the rt_gateway field (of AF_LINK
type) will be used to track which interface a given
address belongs to. This will aid the address source to
use the proper interface for address scope/zone validation.
- The loopback address is not reachable. The root cause is
the same as the above.
- Empty nd6 entries are created for the IPv6 loopback addresses
only for validation reason. Doing so will eliminate as much
of the special case (loopback addresses) handling code
as possible, however, these empty nd6 entries should not
be returned to the userland applications such as the
"ndp" command.
Since both of the above issues contain common files, these
files are committed together.
Reviewed by: bz
MFC after: immediately
sure when this became necessary and might be caused by some missing
code to do auto-configuration of DWDS usage
Noticed by: Felix Feng <unixwind@gmail.com>
the return context, but from the original context.
Before repeating operation clear DONE flag and error.
Reviewed by: sam
Obtained from: Wheel Sp. z o.o. (http://www.wheel.pl)
The macros for PCPU can be slightly simplified, which makes the
resulting tangle qa lot easier to understand when trying to read them.
MFC after: 4 weeks
New counters now exist for:
requests sent
replies sent
requests received
replies received
packets received
total packets dropped due to no ARP entry
entrys timed out
Duplicate IPs seen
The new statistics are seen in the netstat command
when it is given the -s command line switch.
MFC after: 2 weeks
In collaboration with: bz
Right now libteken processes TF_REVERSE internally and returns the
toggled colors to the console driver. This isn't entirely correct. This
means that the bold flag is always processed by the foreground color,
while reversing should be done after the foreground color has been set
to a brighter version by the bold flag.
This is no problem with the syscons driver, because with VGA it only
supports 16 foreground and 8 background colors. My WIP console driver
reconfigures the graphics hardware to disable the blink functionality
and uses 16 foreground and 16 background colors. This means that this
driver will handle the TF_REVERSE flag a little different from what
syscons does right now.
reused by the enhached newbus locking once it is checked in.
This change can be easilly MFCed to STABLE_8 at the appropriate moment.
Reviewed by: jhb, scottl
Tested by: Giovanni Trematerra <giovanni dot trematerra at gmail dot com>
I initially committed libteken to sys/dev/syscons/teken, but now that
I'm working on a console driver myself, I noticed this was not a good
decision. Move it to sys/teken to make it easier for other drivers to
use a terminal emulator.
Also list teken.c in sys/conf/files, instead of listing it in all the
files.arch files separately.
In the lockmgr support:
- GIANT_RESTORE() is just called when the sleep finishes, so the current
code can ends up into a giant unlock problem. Fix it by appropriately
call GIANT_RESTORE() when needed. Note that this is not exactly ideal
because for any interation of the adaptive spinning we drop and restore
Giant, but the overhead should be not a factor.
- In the lock held in exclusive mode case, after the adaptive spinning is
brought to completition, we should just retry to acquire the lock
instead to fallthrough. Fix that.
- Fix a style nit
In the sx support:
- Call GIANT_SAVE() before than looping. This saves some overhead because
in the current code GIANT_SAVE() is called several times.
Tested by: Giovanni Trematerra <giovanni dot trematerra at gmail dot com>
based Intel Macs. Since r189055, these platforms started freezing when
ACPI is being initialized for unknown reason. For these platforms, we just
use the old PAT layout. Note this change is not enough to boot fully on
these platforms because of other problems but it makes debugging possible.
Note MacBook5,2 may be affected as well but it was not added here because
of lack of hardware to test.
- Initialize PAT MSR fully instead of reading and modifying it for safety.
Reported by: rpaulo, hps, Eygene Ryabinkin (rea-fbsd at codelabs dot ru)
Reviewed by: jhb
when removing an interrupt handler from an IRQ during shutdown. During
shutdown we are already bound to CPU 0 and this was triggering a panic.
MFC after: 3 days
out of the original commit of i7 support. These are all the counters
on pages A-32 and A-33 of the _Intel(R) 64 and IA32 Architectures
Software Developer's Manual Vol 3B_, June 2009. Almost all
of these counters relate to operations on the L2 cache.
Reviewed by: jkoshy
MFC after: 1 month
L2 code does not have the ethernet address for the destination
within the broadcast domain in the table, we remember the
original mbuf in `la_hold' in arpresolve() and send out a
different packet with an arp request.
In case there will be more upper layer packets to send we will
free an earlier one held in `la_hold' and queue the new one.
Once we get a packet in, with which we can perfect our arp table
entry we send out the original 'on hold' packet, should there
be any.
Rather than continuing to process the packet that we received,
we returned without freeing the packet that came in, which
basically means that we leaked an mbuf for every arp request
we sent.
Rather than freeing the received packet and returning, continue
to process the incoming arp packet as well.
This should (a) improve some setups, also proxy-arp, in case it was an
incoming arp request and (b) resembles the behaviour FreeBSD had
from day 1, which alignes with RFC826 "Packet reception" (merge case).
Rename 'm0' to 'hold' to make the code more understandable as
well as diffable to earlier versions more easily.
Handle the link-layer entry 'la' lock comepletely in the block
where needed and release it as early as possible, rather than
holding it longer, down to the end of the function.
Found by: pointyhat, ns1
Bug hunting session with: erwin, simon, rwatson
Tested by: simon on cluster machines
Reviewed by: ratson, kmacy, julian
MFC after: 3 days
Remove the altkstacks, instead instantiate threads with kernel stack
allocated with the right size from the start. For the thread that has
kernel stack cached, verify that requested stack size is equial to the
actual, and reallocate the stack if sizes differ [1].
This fixes the bug introduced by r173361 that was committed several days
after r173004 and consisted of kthread_add(9) ignoring the non-default
kernel stack size.
Also, r173361 removed the caching of the kernel stacks for a non-first
thread in the process. Introduce separate kernel stack cache that keeps
some limited amount of preallocated kernel stacks to lower the latency
of thread allocation. Add vm_lowmem handler to prune the cache on
low memory condition. This way, system with reasonable amount of the
threads get lower latency of thread creation, while still not exhausting
significant portion of KVA for unused kstacks.
Submitted by: peter [1]
Discussed with: jhb, julian, peter
Reviewed by: jhb
Tested by: pho (and retested according to new test scenarious)
MFC after: 1 week
alignment requirement could be multiple of 4 bytes but I think
using descriptor size would make intention clearer.
Previously the size of rx descriptor was not power of 2 so it
caused panic in bus_dmamem_alloc(9).
Reported by: Jeff Blank (jb000003 <> mr-happy dot com)
MFC after: 3 days
the previous ap is no longer in range) the device will deliver bmiss
interrupts and trigger the state machine. Also arrange to sync the
beacon timers on the next received beacon frame so that when we don't
roam we re-synchronize with the ap.
Tested by: trasz
MFC after: 1 week
- Routing messages are not generated when adding and removing
interface address aliases.
- Loopback route installed for an interface address alias is
not deleted from the routing table when that address alias
is removed from the associated interface.
- Function in_ifscrub() is called extraneously.
Reviewed by: gnn, kmacy, sam
MFC after: 3 days
- Always calculate the cache bits instead of doing it on-demand.
- Always set changed to TRUE rather than only doing it if it is false.
Discussed with: alc
MFC after: 3 days
page into 4KB pages as needed. This should be fairly rare in practice
on i386. This includes merging the following changes from the amd64 pmap:
180430, 180485, 180845, 181043, 181077, and 196318.
- Add basic support for changing attributes on PDEs to pmap_change_attr()
similar to the support in the initial version of pmap_change_attr() on
amd64 including inlines for pmap_pde_attr() and pmap_pte_attr().
- Extend pmap_demote_pde() to include the ability to instantiate a new page
table page where none existed before.
- Enhance pmap_change_attr(). Use pmap_demote_pde() to demote a 2/4MB page
mapping to 4KB page mappings when the specified attribute change only
applies to a portion of the 2/4MB page. Previously, in such cases,
pmap_change_attr() gave up and returned an error.
- Correct a critical accounting error in pmap_demote_pde().
Reviewed by: alc
MFC after: 3 days
used by the suspension code, not greater then mnt_ref reference
counter value. Increment mnt_ref together with write counter
in vn_start_write()/ vn_start_secondary_write(), releasing in
vn_finished_write/vn_finished_secondary_write().
Since r186197, unmount code requires that no writers occured after all
references are expired. We still could get write counter incremented
for freed or reused struct mount, but it seems to be innocent, since
corresponding vnode should be referenced and reclaimed then.
Reported by: pho (last half a year), erwin
Reviewed by: attilio
Tested by: pho, erwin
MFC after: 1 week
