| Commit message (Collapse) | Author | Age | Files | Lines |
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Some changes to symtab.c had broken the symbol reference handling for
prefix-lists in plist.c
This commit further "improves" the symbol table functions, to support
current use rather better. One key change is that the symbol table
supports the notion of a symbol which is "set", so has some value other
than its name.
In the case of prefix-lists, a prefix-list is "set" when there is at
least one (valid) entry or a description has been set.
Changes include:
* small changes in bgpd/bgp_clist.c where symbol table function names
have changed and other small differences.
* similarly in bgpd/bgp_peer_index.c, but here also clarified ownership
of the peer index entries, and ensured that the symbol table stuff
does *not* free same.
* in bgpd/bgp_route.c fixed the handling of references to prefix-lists.
Newer symbol handling more clearly identifies when a symbol has some
value "set".
* in bgpd/bgp_vty.c similarly, when showing state of filtering the "*"
against a prefix-list means it is "set".
* in lib/plist.c -- adjust to newer symbol table stuff. Fix issues
will add_hook and delete_hook. Changed lookup so that if plist
is not set, then lookup will return not-found -- so works as
before (!).
* adjusted test for symbol stuff.
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NB: this is a partial interim version -- NOT for production.
Reinstate vtysh. In bgpd: cope better with generating oversize messages.
The "pipework" branch is no more. There is now "euro_ix" and "euro_ix_b",
where 'b' stands for 'bleedin'. The "pipework" is currently in 'bleedin'.
Version updated to: 0.99.18ex20b
Major changes in this commit:
* modified bgpd to avoid crashing if an oversize message is created.
At present, any oversize messages are simply discarded. This may be a
mistake... since it is possible that some routes that should have been
withdrawn are not. TBA.
The stream lib facilities have been overhauled to may this easier.
* restoring vtysh.
At present the vtysh is thought to work, except that it does not
currently create integrated configuration files.
For the time being, *only* the following compile:
lib, bgpd, zebra, vtysh, tests
All other daemons will fail to compile, and must be disabled.
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Some small changes to accomodate same.
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Modified the symbol table so that the name of the symbol is now
a property of its value -- which simplifies some of the semantics,
because the name no longer has a separate existence (a name which
refers to an empty or undefined value is now a matter for the
value, not for the symbol table). It also allows for the symbol
table to be used where the value and the name are almost
indistinguishable.
Introduced AVL tree to support large prefix lists, routemaps,
etc. etc.
Updated testsymtab and added testavl.
Updated exiting use of the symbol table.
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Merge with euro_ix branch v0.99.18ex17.
Update version to: 0.99.18ex18p
Of particular note:
* includes support for GTSM:
neighbor ... ttl-security hops X
no neighbor ... ttl-security hops X
where X is 1-254. For usual case of immediately connected
peer, X == 1.
Cannot set ttl-security while ebgp-multihop is set, and
vice-versa.
If underlying O/S does not support GTSM, then will set ttl
as per ebgp-multihop.
In passing, have fixed various bugs in the main Quagga branch.
* initial support for draft-ietf-idr-optional-transitive
Does not yet support "neighbor-complete" flag.
* main Quagga now uses TCP_CORK and permanent non-blocking
Do not beleive TCP_CORK to be necessary for euro_ix code...
which has a different buffering strategy.
The euro_ix code already runs sockets permanently non-blocking.
* various fixes to attribute intern/unintern
Trying to remove memory leaks. Nobody seems convinced that
this has been perfected, yet.
* fixes for ospfd and ospf6d issues.
Up to date with master branch up to:
commit 538cb284864c17de66152a5236db4cd80e3e7639
Merge: 036a6e6 8ced4e8
Author: Paul Jakma <paul@quagga.net>
Date: Fri Jul 29 18:21:50 2011 +0100
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Create euro_ix branch.
Update version to: 0.99.18ex17
Of particular note:
* includes support for GTSM:
neighbor ... ttl-security hops X
no neighbor ... ttl-security hops X
where X is 1-254. For usual case of immediately connected
peer, X == 1.
Cannot set ttl-security while ebgp-multihop is set, and
vice-versa.
If underlying O/S does not support GTSM, then will set ttl
as per ebgp-multihop.
In passing, have fixed various bugs in the main Quagga branch.
* initial support for draft-ietf-idr-optional-transitive
Does not yet support "neighbor-complete" flag.
* main Quagga now uses TCP_CORK and permanent non-blocking
Do not beleive TCP_CORK to be necessary for euro_ix code...
which has a different buffering strategy.
The euro_ix code already runs sockets permanently non-blocking.
* various fixes to attribute intern/unintern
Trying to remove memory leaks. Nobody seems convinced that
this has been perfected, yet.
* fixes for ospfd and ospf6d issues.
Up to date with master branch up to:
commit 538cb284864c17de66152a5236db4cd80e3e7639
Merge: 036a6e6 8ced4e8
Author: Paul Jakma <paul@quagga.net>
Date: Fri Jul 29 18:21:50 2011 +0100
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extcom..'
* Extended communities has some kind of resource allocation problem which
causes a double-free if the 'set extcommunity ...' command is used.
Try fix by properly interning extcommunities.
Also, more generally, make unintern functions take a double pointer
so they can NULL out callers references - a usefully defensive programming
pattern for functions which make refs invalid.
Sadly, this patch doesn't fix the problem entirely - crashes still
occur on session clear.
* bgp_ecommunity.h: (ecommunity_{free,unintern}) take double pointer
args.
* bgp_community.h: (community_unintern) ditto
* bgp_attr.h: (bgp_attr_intern) ditto
* bgp_aspath.h: (bgp_aspath.h) ditto
* (general) update all callers of above
* bgp_routemap.c: (route_set_ecommunity_{rt,soo}) intern the new extcom added
to the attr, and unintern any old one.
(route_set_ecommunity_{rt,soo}_compile) intern the extcom to be used
for the route-map set.
(route_set_ecommunity_*_free) unintern to match, instead of free
(route_set_ecommunity_soo) Do as _rt does and don't just leak
any pre-existing community, add to it (is additive right though?)
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Affects: lib/plist.c & .h and bgpd/bgp_clist.c & .h
With very long prefix-lists the repeated scanning of the linked list
of prefix_list_entry slowed things down (scaled O(n**2)). For lists
of 10,000 or more entries this could consume several *minutes* while
reading a configuration file.
This is a substantial re-working of the code, making use of new
facilities introduced in lib/symtab and lib/vector.
The prefix-list names are held in a symbol table. The addition of
entries to a prefix-list uses binary-chop searches rather than linear
list scans.
For bgpd, all references to prefix-lists are replaced by symbol table
references. The peer_prefix_list_update function is called every time
a prefix-list changes. This used to run through every possible
reference to a prefix-list to see if its address needed updating.
For other daemons, the old interfaces have been preserved.
The prefix match code has been stream-lined a little.
The BGP community-list and extcommunity-list handling has also been
updated to use a symbol table to hold the names. This improves the
processing of route-maps, which look-up the list by name each time
it is used. (In the longer term, this should be replaced by the use
of symbol references.)
Other files affected:
bgpd/bgpd.c & .h
bgpd/bgp_route.c & .h
bgpd/bgp_packet.c
bgpd/bgp_vty.c
updated to use prefix list references & community list symbols.
symtab.c & .h
small change to symbol_dec_ref & symbol_zero_ref to return NULL
if reference count goes to zero, and the symbol otherwise.
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I've spent the last several weeks working on stability fixes to bgpd.
These patches fix all of the numerous crashes, assertion failures, memory
leaks and memory stomping I could find. Valgrind was used extensively.
Added new function bgp_exit() to help catch problems. If "debug bgp" is
configured and bgpd exits with status of 0, statistics on remaining
lib/memory.c allocations are printed to stderr. It is my hope that other
developers will use this to stay on top of memory issues.
Example questionable exit:
bgpd: memstats: Current memory utilization in module LIB:
bgpd: memstats: Link List : 6
bgpd: memstats: Link Node : 5
bgpd: memstats: Hash : 8
bgpd: memstats: Hash Bucket : 2
bgpd: memstats: Hash Index : 8
bgpd: memstats: Work queue : 3
bgpd: memstats: Work queue item : 2
bgpd: memstats: Work queue name string : 3
bgpd: memstats: Current memory utilization in module BGP:
bgpd: memstats: BGP instance : 1
bgpd: memstats: BGP peer : 1
bgpd: memstats: BGP peer hostname : 1
bgpd: memstats: BGP attribute : 1
bgpd: memstats: BGP extra attributes : 1
bgpd: memstats: BGP aspath : 1
bgpd: memstats: BGP aspath str : 1
bgpd: memstats: BGP table : 24
bgpd: memstats: BGP node : 1
bgpd: memstats: BGP route : 1
bgpd: memstats: BGP synchronise : 8
bgpd: memstats: BGP Process queue : 1
bgpd: memstats: BGP node clear queue : 1
bgpd: memstats: NOTE: If configuration exists, utilization may be expected.
Example clean exit:
bgpd: memstats: No remaining tracked memory utilization.
This patch fixes bug #397: "Invalid free in bgp_announce_check()".
This patch fixes bug #492: "SIGBUS in bgpd/bgp_route.c:
bgp_clear_route_node()".
My apologies for not separating out these changes into individual patches.
The complexity of doing so boggled what is left of my brain. I hope this
is all still useful to the community.
This code has been production tested, in non-route-server-client mode, on
a linux 32-bit box and a 64-bit box.
Release/reset functions, used by bgp_exit(), added to:
bgpd/bgp_attr.c,h
bgpd/bgp_community.c,h
bgpd/bgp_dump.c,h
bgpd/bgp_ecommunity.c,h
bgpd/bgp_filter.c,h
bgpd/bgp_nexthop.c,h
bgpd/bgp_route.c,h
lib/routemap.c,h
File by file analysis:
* bgpd/bgp_aspath.c: Prevent re-use of ashash after it is released.
* bgpd/bgp_attr.c: #if removed uncalled cluster_dup().
* bgpd/bgp_clist.c,h: Allow community_list_terminate() to be called from
bgp_exit().
* bgpd/bgp_filter.c: Fix aslist->name use without allocation check, and
also fix memory leak.
* bgpd/bgp_main.c: Created bgp_exit() exit routine. This function frees
allocations made as part of bgpd initialization and, to some extent,
configuration. If "debug bgp" is configured, memory stats are printed
as described above.
* bgpd/bgp_nexthop.c: zclient_new() already allocates stream for
ibuf/obuf, so bgp_scan_init() shouldn't do it too. Also, made it so
zlookup is global so bgp_exit() can use it.
* bgpd/bgp_packet.c: bgp_capability_msg_parse() call to bgp_clear_route()
adjusted to use new BGP_CLEAR_ROUTE_NORMAL flag.
* bgpd/bgp_route.h: Correct reference counter "lock" to be signed.
bgp_clear_route() now accepts a bgp_clear_route_type of either
BGP_CLEAR_ROUTE_NORMAL or BGP_CLEAR_ROUTE_MY_RSCLIENT.
* bgpd/bgp_route.c:
- bgp_process_rsclient(): attr was being zero'ed and then
bgp_attr_extra_free() was being called with it, even though it was
never filled with valid data.
- bgp_process_rsclient(): Make sure rsclient->group is not NULL before
use.
- bgp_processq_del(): Add call to bgp_table_unlock().
- bgp_process(): Add call to bgp_table_lock().
- bgp_update_rsclient(): memset clearing of new_attr not needed since
declarationw with "= { 0 }" does it. memset was already commented
out.
- bgp_update_rsclient(): Fix screwed up misleading indentation.
- bgp_withdraw_rsclient(): Fix screwed up misleading indentation.
- bgp_clear_route_node(): Support BGP_CLEAR_ROUTE_MY_RSCLIENT.
- bgp_clear_node_queue_del(): Add call to bgp_table_unlock() and also
free struct bgp_clear_node_queue used for work item.
- bgp_clear_node_complete(): Do peer_unlock() after BGP_EVENT_ADD() in
case peer is released by peer_unlock() call.
- bgp_clear_route_table(): Support BGP_CLEAR_ROUTE_MY_RSCLIENT. Use
struct bgp_clear_node_queue to supply data to worker. Add call to
bgp_table_lock().
- bgp_clear_route(): Add support for BGP_CLEAR_ROUTE_NORMAL or
BGP_CLEAR_ROUTE_MY_RSCLIENT.
- bgp_clear_route_all(): Use BGP_CLEAR_ROUTE_NORMAL.
Bug 397 fixes:
- bgp_default_originate()
- bgp_announce_table()
* bgpd/bgp_table.h:
- struct bgp_table: Added reference count. Changed type of owner to be
"struct peer *" rather than "void *".
- struct bgp_node: Correct reference counter "lock" to be signed.
* bgpd/bgp_table.c:
- Added bgp_table reference counting.
- bgp_table_free(): Fixed cleanup code. Call peer_unlock() on owner if
set.
- bgp_unlock_node(): Added assertion.
- bgp_node_get(): Added call to bgp_lock_node() to code path that it was
missing from.
* bgpd/bgp_vty.c:
- peer_rsclient_set_vty(): Call peer_lock() as part of peer assignment
to owner. Handle failure gracefully.
- peer_rsclient_unset_vty(): Add call to bgp_clear_route() with
BGP_CLEAR_ROUTE_MY_RSCLIENT purpose.
* bgpd/bgp_zebra.c: Made it so zclient is global so bgp_exit() can use it.
* bgpd/bgpd.c:
- peer_lock(): Allow to be called when status is "Deleted".
- peer_deactivate(): Supply BGP_CLEAR_ROUTE_NORMAL purpose to
bgp_clear_route() call.
- peer_delete(): Common variable listnode pn. Fix bug in which rsclient
was only dealt with if not part of a peer group. Call
bgp_clear_route() for rsclient, if appropriate, and do so with
BGP_CLEAR_ROUTE_MY_RSCLIENT purpose.
- peer_group_get(): Use XSTRDUP() instead of strdup() for conf->host.
- peer_group_bind(): Call bgp_clear_route() for rsclient, and do so with
BGP_CLEAR_ROUTE_MY_RSCLIENT purpose.
- bgp_create(): Use XSTRDUP() instead of strdup() for peer_self->host.
- bgp_delete(): Delete peers before groups, rather than after. And then
rather than deleting rsclients, verify that there are none at this
point.
- bgp_unlock(): Add assertion.
- bgp_free(): Call bgp_table_finish() rather than doing XFREE() itself.
* lib/command.c,h: Compiler warning fixes. Add cmd_terminate(). Fixed
massive leak in install_element() in which cmd_make_descvec() was being
called more than once for the same cmd->strvec/string/doc.
* lib/log.c: Make closezlog() check fp before calling fclose().
* lib/memory.c: Catch when alloc count goes negative by using signed
counts. Correct #endif comment. Add log_memstats_stderr().
* lib/memory.h: Add log_memstats_stderr().
* lib/thread.c: thread->funcname was being accessed in thread_call() after
it had been freed. Rearranged things so that thread_call() frees
funcname. Also made it so thread_master_free() cleans up cpu_record.
* lib/vty.c,h: Use global command_cr. Add vty_terminate().
* lib/zclient.c,h: Re-enable zclient_free().
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Use Ansi-C prototypes rather than old K&R method of declaring
function without arguments
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Simple conversion of XMALLOC/memset to XCALLOC
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2006-01-19 Paul Jakma <paul.jakma@sun.com>
* (general) various miscellaneous compiler warning fixes.
Remove redundant break statements from switch clauses
which return.
return from main, not exit, cause it annoys SOS.
Remove stray semi-colons which cause empty-statement
warnings.
* zebra/main.c: (sighup) remove private declaration of external
function.
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* (global) The great bgpd extern and static'ification.
* bgp_routemap.c: remove unused ROUTE_MATCH_ASPATH_OLD code
(route_set_metric_compile) fix u_int32_t to ULONG_MAX comparison
warnings.
* bgp_route.h: (bgp_process, bgp_withdraw, bgp_update) export these
used by various files which had their own private declarations,
in the case of mplsvpn - incorrect.
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community-list cleanup.
[merge from GNU Zebra]
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* (global) more const'ification and fixups of types to clean up code.
* bgp_mplsvpn.{c,h}: (str2tag) fix abuse. Still not perfect,
should use something like the VTY_GET_INTEGER macro, but without
the vty_out bits..
* bgp_routemap.c: (set_aggregator_as) use VTY_GET_INTEGER_RANGE
(no_set_aggregator_as) ditto.
* bgpd.c: (peer_uptime) fix unlikely bug, where no buffer is
returned, add comments about troublesome return value.
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* bgp_clist.c (community_list_delete): honour deny statements
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* (bgp_clist.c): Run it through indent -nut (all indentation to
be spaced, get rid of mix of tabs and spaces)
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