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279 commits

Author SHA1 Message Date
Ondrej Zajicek (work)
a2527ee53d Filter: Improve handling of stack frames in filter bytecode 
When f_line is done, we have to pop the stack frame. The old code just
removed nominal number of args/vars. Change it to use stored ventry value
modified by number of returned values. This allows to allocate variables
on a stack frame during execution of f_lines instead of just at start.

But we need to know the number of returned values for a f_line. It is 1
for term, 0 for cmd. Store that to f_line during linearization.
 2022-06-27 21:13:32 +02:00
Ondrej Zajicek (work)
ff2ca10cba Filter: Add support for src/dst accessors for Flowspec and SADR 2019-12-09 04:23:01 +01:00
Ondrej Zajicek (work)
87512e9751 Filter: Improve typecheck error messages 2019-11-05 15:30:16 +01:00
Ondrej Zajicek (work)
ea0917bcba Filter: Fix eval command 2019-09-24 00:18:48 +02:00
Maria Matejka
3782454e8d Filter: Simpler filter context allocation 2019-07-15 15:46:36 +02:00
Maria Matejka
c0999a149c Filter: Converted FI_PRINT and FI_PATHMASK_CONSTRUCT to VARARG 2019-07-15 15:12:18 +02:00
Maria Matejka
0da06b7103 Filter: lots of documentation 2019-07-15 13:19:01 +02:00
Maria Matejka
547be53b8c Filter: Don't fail badly when trying to access non-existent route in config time 2019-07-15 12:03:13 +02:00
Ondrej Zajicek (work)
bfa15a642f Filter: Minor cleanups 2019-07-10 16:47:17 +02:00
Maria Matejka
84ac62d396 Filter: CLI command to dump all the linearized filters 2019-07-03 08:27:56 +02:00
Maria Matejka
b40c0f028f Filter: Pre-evaluation of constant expressions 2019-07-02 10:45:53 +02:00
Maria Matejka
a84b8b6ebb Revert "Filter: Dropped the setter instructions in favor of direct result storage." 
This reverts commit bd91338246.
 2019-06-19 14:09:57 +02:00
Maria Matejka
87c82334a7 Filter: removal of semantically insane consts in filter_commit 2019-06-13 14:24:48 +02:00
Maria Matejka
bd91338246 Filter: Dropped the setter instructions in favor of direct result storage. 
This should help filter performance a bit.
 2019-06-03 10:41:35 +02:00
Maria Matejka
aa6c5f4d92 Filter: Just a little comments in filter structure 2019-05-30 14:42:54 +02:00
Maria Matejka
1757a6fce5 Filter: Stacks moved to thread-local storage if available. 2019-05-29 21:03:52 +02:00
Jan Maria Matejka
6479e403ef Filters: If somebody doesn't like _Thread_local, don't fail for now, just be a little slower. 
When the parallel execution comes into place, we'll likely enforce this
C11 feature. It's much simpler and also faster than pthread_[sg]etspecific().
 2019-05-23 11:27:24 +00:00
Jan Maria Matejka
96d757c13f Filter: Store variables and function arguments on stack 2019-05-21 16:33:37 +00:00
Jan Maria Matejka
20c6ea70cc Filter: Making the filter state thread local. 
While having the filter code still reentrant if we really need,
the compiler can now do constant propagation and address the
thread local storage directly to save some computation time.
 2019-05-20 17:53:10 +00:00
Maria Matejka
f249d0b84c Filters: comparison of functions and filters caching 2019-02-26 16:44:24 +01:00
Maria Matejka
d1039926f5 Filter: Interpreter merged into the common m4 generator. 
The config-time partial evaluation of constant expressions in filters is nearby.
 2019-02-20 22:30:55 +01:00
Maria Matejka
ea4f55e3dc Filter: More cleanup -- customized structures also in struct f_line_item 2019-02-20 22:30:55 +01:00
Maria Matejka
0b39b1cbb7 Conf: Symbol implementation converted from void pointers to union 
... and consted some declarations.
 2019-02-20 22:30:55 +01:00
Maria Matejka
132529ce89 Filter: merged filter compare functions into common M4 file 2019-02-20 22:30:55 +01:00
Maria Matejka
dd4d409551 Filter: Merged postfixify routine 2019-02-20 22:30:54 +01:00
Maria Matejka
de12cd18fb Filter: Merged filter line item dumpers into common generated source 2019-02-20 22:30:54 +01:00
Maria Matejka
b256f24145 Filter: auto-generating enum-to-string 2019-02-20 22:30:54 +01:00
Maria Matejka
5289304519 Filter data manipulation functions separated to their file 2019-02-20 22:30:54 +01:00
Maria Matejka
4f082dfa89 Filter: merged filter instruction constructors, counting line size on instruction construct 2019-02-20 22:30:54 +01:00
Maria Matejka
8bdb05edb2 Filters: split the large filter.h file to smaller files. 
This should be revised, there are still ugly things in the filter API.
 2019-02-20 22:30:54 +01:00
Maria Matejka
c1e97169cd Filter: M4 convertors polished a bit. 2019-02-20 22:30:54 +01:00
Maria Matejka
9b46748d5b Filter: refactoring of instruction constructors 2019-02-20 22:30:54 +01:00
Maria Matejka
4c553c5a5b Filter refactoring: dropped the recursion from the interpreter 
This is a major change of how the filters are interpreted. If everything
works how it should, it should not affect you unless you are hacking the
filters themselves.

Anyway, this change should make a huge improvement in the filter performance
as previous benchmarks showed that our major problem lies in the
recursion itself.

There are also some changes in nest and protocols, related mostly to
spreading const declarations throughout the whole BIRD and also to
refactored dynamic attribute definitions. The need of these came up
during the whole work and it is too difficult to split out these
not-so-related changes.
 2019-02-20 22:30:54 +01:00
Maria Matejka
967b88d938 Filter refactoring: The instructions are converted to the switch body by M4 2019-02-20 22:30:54 +01:00
Maria Matejka
8436040735 Filter refactoring: Drop the roa check specific f_inst 2019-02-20 22:30:54 +01:00
Maria Matejka
7f0ac73724 Filter refactoring: Changed arguments from separate unions to an array 2019-02-20 22:30:54 +01:00
Maria Matejka
224b77d4f7 Filter refactoring: Converted condition to three-args instruction 2019-02-20 22:30:54 +01:00
Maria Matejka
8e8b1fe48c Filter refactoring: Some instructions eat up excessively much space. 2019-02-20 22:30:54 +01:00
Maria Matejka
a8740d6c09 Filter refactoring: indentation fix 2019-02-20 22:30:54 +01:00
Jan Maria Matejka
fc8df41ec6 Filter refactoring: The values are now saved on a custom stack. 
This shall help with performance.
 2019-02-20 22:30:54 +01:00
Jan Maria Matejka
7afa143886 Filter refactoring: Passing the resulting struct f_val as a pointer. 
This also drops the multiplexing of errors with the f_val itself
together with the T_RETURN f_val type flag.
 2019-02-20 22:30:54 +01:00
Jan Maria Matejka
f62a369fb4 Filter refactoring: Moved filter instruction definition to a separate file 2019-02-20 22:30:54 +01:00
Jan Maria Matejka
25566c6810 Filter refactoring: Moved the bitfield bit position formula to route.h 2019-02-20 22:30:54 +01:00
Jan Maria Matejka
aca8263926 Filter refactoring: Moved the interpret macros inside the block 2019-02-20 22:30:54 +01:00
Jan Maria Matejka
a946317fab Filter: Converted static global variables to a filter_state struct. 
The static filter state was messy and blocked the planned parallel
execution of filters. Anyway, this will be also slower as the state
structure must be passed almost everywhere with us.
 2019-02-20 22:30:53 +01:00
Maria Matejka
265419a369 Custom route attributes 
For local route marking purposes, local custom route attributes may be
defined. These attributes are seamlessly stripped after export filter to
every real protocol like Kernel, BGP or OSPF, they however pass through
pipes. We currently allow at most 256 custom attributes.

This should be much faster than currently used bgp communities
for marking routes.
 2018-12-06 09:55:21 +01:00
Ondrej Zajicek (work)
f2d8e6801e Filter: Make ifname attribute modifiable 
Allow to change an interface associated with a route by setting
ifname attribute. It will also change the route to a direct one.
 2018-11-05 22:03:21 +01:00
Ondrej Zajicek (work)
41b83e52f7 Filter: Fix minor bug in accessing bgp_path 
Not relevant for regular BGP paths, just for BGP paths added by filters
to e.g. static routes.
 2018-10-25 11:23:15 +02:00
Ondrej Zajicek (work)
586c1800c4 Nest: Neighbor cache cleanups 
Simplify neighbor cache code, fix several minor bugs, and improve
handling of ONLINK flag.
 2018-06-27 16:57:07 +02:00
Jan Maria Matejka
1771f70d74 Filter: fixed eattr cached pointer 
Use ACCESS_RTE to guard **f_rte, use ACCESS_EATTRS to guard **f_eattrs.
Use f_rta_cow() before writing to rta or eattrs, use f_rte_cow() before
writing preference (stored in rte).

Do not access eattrs indirectly through (*f_rte)->attrs->eattrs, it is
way too slow. The cached pointer is faster.
 2018-06-19 16:51:40 +02:00