the same opcode.
o Reduce number of times classifier callback is called. It is
redundant to call it just after find_op_rw(), since the last
does call it already and can have all results.
o Do immediately opcode rewrite in the ref_opcode_object().
This eliminates additional classifier lookup later on bulk update.
For unresolved opcodes the behavior still the same, we save information
from classifier callback in the obj_idx array, then perform automatic
objects creation, then perform rewriting for opcodes using indeces
from created objects.
Obtained from: Yandex LLC
Sponsored by: Yandex LLC
taskqueue_enqueue() was changed to support both fast and non-fast
taskqueues 10 years ago in r154167. It has been a compat shim ever
since. It's time for the compat shim to go.
Submitted by: Howard Su <howard0su@gmail.com>
Reviewed by: sephe
Differential Revision: https://reviews.freebsd.org/D5131
is followed by another structure (rr_schk) whose size must be set
in the schk_datalen field of the descriptor.
Not allocating the memory may cause other memory to be overwritten
(though dn_schk is 192 bytes and rr_schk only 12 so we may be lucky
and end up in the padding after the dn_schk).
This is a merge candidate for stable and 10.3
MFC after: 3 days
in computing a shift index. The error was due to the use of mixed
fls() / __fls() functions in another implementation of qfq.
To avoid that the problem occurs again, properly document which
incarnation of the function we need.
Note that the bug only affects QFQ in FreeBSD head from last july, as
the patch was not merged to other versions.
There are number of radix consumers in kernel land (pf,ipfw,nfs,route)
with different requirements. In fact, first 3 don't have _any_ requirements
and first 2 does not use radix locking. On the other hand, routing
structure do have these requirements (rnh_gen, multipath, custom
to-be-added control plane functions, different locking).
Additionally, radix should not known anything about its consumers internals.
So, radix code now uses tiny 'struct radix_head' structure along with
internal 'struct radix_mask_head' instead of 'struct radix_node_head'.
Existing consumers still uses the same 'struct radix_node_head' with
slight modifications: they need to pass pointer to (embedded)
'struct radix_head' to all radix callbacks.
Routing code now uses new 'struct rib_head' with different locking macro:
RADIX_NODE_HEAD prefix was renamed to RIB_ (which stands for routing
information base).
New net/route_var.h header was added to hold routing subsystem internal
data. 'struct rib_head' was placed there. 'struct rtentry' will also
be moved there soon.
if more than 64 distinct values had been used.
Table value code uses internal objhash API which requires unique key
for each object. For value code, pointer to the actual value data
is used. The actual problem arises from the fact that 'actual' e.g.
runtime data is stored in array and that array is auto-growing. There is
special hook (update_tvalue() function) which is used to update the pointers
after the change. For some reason, object 'key' was not updated.
Fix this by adding update code to the update_tvalue().
Sponsored by: Yandex LLC
compiled into the kernel. Ideally lots more code would just not
be called (or compiled in) in that case but that requires a lot
more surgery. For now try to make IP-less kernels compile again.
panics when unloading the dummynet and IPFW modules:
- The callout drain function can sleep and should not be called having
a non-sleepable lock locked. Remove locks around "ipfw_dyn_uninit(0)".
- Add a new "dn_gone" variable to prevent asynchronous restart of
dummynet callouts when unloading the dummynet kernel module.
- Call "dn_reschedule()" locked so that "dn_gone" can be set and
checked atomically with regard to starting a new callout.
Reviewed by: hiren
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D3855
Vast majority of rtalloc(9) users require only basic info from
route table (e.g. "does the rtentry interface match with the interface
I have?". "what is the MTU?", "Give me the IPv4 source address to use",
etc..).
Instead of hand-rolling lookups, checking if rtentry is up, valid,
dealing with IPv6 mtu, finding "address" ifp (almost never done right),
provide easy-to-use API hiding all the complexity and returning the
needed info into small on-stack structure.
This change also helps hiding route subsystem internals (locking, direct
rtentry accesses).
Additionaly, using this API improves lookup performance since rtentry is not
locked.
(This is safe, since all the rtentry changes happens under both radix WLOCK
and rtentry WLOCK).
Sponsored by: Yandex LLC
It is called when last reference to named object is going to be released
and allows to do additional cleanup for implementation of named objects.
Obtained from: Yandex LLC
Sponsored by: Yandex LLC
Actually, object classify callbacks can skip some opcodes, that could
be rewritten. We will deteremine real numbed of rewritten opcodes a bit
later in this function.
Reported by: David H. Wolfskill <david at catwhisker dot org>
check_ipfw_rule_body() function. This function is intended to just
determine that rule has some opcodes that can be rewrited. Then the
ref_rule_objects() function will determine real number of rewritten
opcodes using classify callback.
Reviewed by: melifaro
Obtained from: Yandex LLC
Sponsored by: Yandex LLC
object name correctness. Each type of object can do more strict checking
in own implementation. Do such checks for tables in check_table_name().
Reviewed by: melifaro
Obtained from: Yandex LLC
Sponsored by: Yandex LLC
Skip checks for IPv6 multicast addresses.
Use in6_localip() for global unicast.
And for IPv6 link-local addresses do search in the IPv6 addresses list.
Since LLA are stored in the kernel internal form, use
IN6_ARE_MASKED_ADDR_EQUAL() macro with lla_mask for addresses comparison.
lla_mask has zero bits in the second word, where we keep sin6_scope_id.
Obtained from: Yandex LLC
Sponsored by: Yandex LLC
- use 1ULL to avoid shift truncations
- recompute the sum of weight dynamically to provide better fairness
- fix an erroneous constant in the computation of the slot
- preserve timestamp correctness when the old timestamp is stale.
years for head. However, it is continuously misused as the mpsafe argument
for callout_init(9). Deprecate the flag and clean up callout_init() calls
to make them more consistent.
Differential Revision: https://reviews.freebsd.org/D2613
Reviewed by: jhb
MFC after: 2 weeks
even if there was non-zero number of restarts, we would unref/clear
all value references and start ipfw_link_table_values() once again
with (mostly) cleared "tei" buffer.
Additionally, ptei->ptv stores only to-be-added values, not existing ones.
This is a forgotten piece of previous value refconting implementation,
and now it is simply incorrect.
