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BGP was ignoring nexthop info for static and other redistributed
routes for IPv6. Build extra attribute info to store the nexthop.
See also:
https://bugzilla.vyatta.com/show_bug.cgi?id=6073
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* bgpd/bgp_fsm.c
* bgp_clearing_completed(): only used in one file, can be static
* bgpd/bgp_packet.c
* afi2str(): sayonara
* safi2str(): sayonara
* bgpd/bgp_route.c
* bgp_distance_reset(): sayonara
* bgpd/bgp_zebra.c
* bgp_ifindex_by_nexthop(): sayonara
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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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2007-05-03 Paul Jakma <paul.jakma@sun.com>
* bgp_route.h: (struct info) Move less frequently used
fields to a lazily allocated struct info_extra.
Export bgp_info_extra_get
* bgp_route.c: (bgp_info_extra_new) allocate extra
(bgp_info_extra_free) Free damp info and the info_extra.
(bgp_info_extra_get) Retrieve the info_extra of a struct
info, allocating as required.
(generally) adjust to use info->extra
* bgp_damp.c: (generally) use bgp_info_extra_get to access
dampinfo
* bgp_attr.h: Move rarely allocated attributes from struct attr
to a struct attr_extra, for a substantial saving in size of
struct attr.
* bgp_attr.c: (bgp_attr_extra_{new,free}), new, self-explanatory.
(bgp_attr_extra_get) Get the attr_extra for a given struct
attr, allocating it if needs be.
(bgp_attr_dup) Shallow copy the struct attr and its attr_extra.
(generally) adjust to know about attr->extra.
* bgp_debug.c: (bgp_dump_attr) ditto
* bgp_vty.c: (show_bgp_memory) print attr and info extra sizes.
* bgp_nexthop.c: (generally) adjust to know about attr->extra
and info->extra.
* bgp_{packet,routemap,snmp,zebra}.c: ditto
* lib/memtypes.c: Add MTYPE_ATTR_EXTRA and MTYPE_BGP_ROUTE_EXTRA
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2006-11-30 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
* bgp_debug.h: Declare new bgp_debug_zebra conf and term flags,
and define BGP_DEBUG_ZEBRA.
* bgp_debug.c: Declare conf_bgp_debug_zebra and term_bgp_debug_zebra.
(debug_bgp_zebra, no_debug_bgp_zebra, undebug_bgp_zebra) New
functions to enable/disable bgp zebra debugging.
(no_debug_bgp_all) Turn off zebra debugging.
(show_debugging_bgp) Show whether zebra debugging is on.
(bgp_config_write_debug) Add 'debug bgp zebra' if configured.
(bgp_debug_init) Add new zebra debugging commands.
* bgp_zebra.c: (bgp_router_id_update, bgp_interface_add,
bgp_interface_delete, bgp_interface_up, bgp_interface_down,
bgp_interface_address_add, bgp_interface_address_delete,
zebra_read_ipv4, zebra_read_ipv6, bgp_zebra_announce,
bgp_zebra_withdraw, bgp_redistribute_set, bgp_redistribute_unset)
If zebra debugging is enabled, log an appropriate debug message.
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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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Implement non-blocking zclient I/O with buffering.
* zclient.h (struct zclient): Add two fields to support non-blocking
I/O: struct buffer *wb, and struct thread *t_write.
(zclient_free): Remove function.
(zebra_redistribute_send): Change 2nd arg from socket fd to
struct zclient * (needed to support non-blocking I/O and buffering).
(zclient_send_message): New function to send an arbitrary
message with non-blocking I/O.
* zclient.c (zclient_new): Create write buffer.
(zclient_free): Remove unused function.
(zclient_stop): Must cancel new t_write thread. Also, reset
all buffers: ibuf, obuf, and wb.
(zclient_failed): New helper function for typical error handling.
(zclient_flush_data): New thread to flush queued data.
(zclient_send_message): New function to send the message in
zclient->obuf to zebra using non-blocking I/O and buffering.
(zebra_message_send, zapi_ipv4_route, zapi_ipv6_route): Use
new zclient_send_message function instead of calling writen.
(zclient_start): Set socket non-blocking. Also, change 2nd arg
to zebra_redistribute_send from zclient->sock to zclient.
(zebra_redistribute_send): Change 2nd arg to struct zclient *.
Can now use zclient->obuf to assemble the message instead of
allocating a temporary stream. And call zclient_send_message to
send the message instead of writen.
(zclient_read): Convert to support non-blocking I/O by using
stream_read_try instead of deprecated stream_read.
(zclient_redistribute): Change 2nd arg to zebra_redistribute_send
from zclient->sock to zclient.
* ospf6_zebra.c (ospf6_zebra_redistribute, ospf6_zebra_no_redistribute):
Change 2nd arg to zebra_redistribute_send from zclient->sock
to zclient.
* ospf_zebra.c (ospf_zebra_add): Call zclient_send_message instead
of writen.
* rip_zebra.c (rip_redistribute_set, rip_redistribute_unset,
rip_redistribute_clean): Change 2nd arg to zebra_redistribute_send
from zclient->sock to zclient.
* ripng_zebra.c (ripng_redistribute_unset, ripng_redistribute_clean):
Change 2nd arg to zebra_redistribute_send from zclient->sock
to zclient.
* bgp_zebra.c (bgp_redistribute_set, bgp_redistribute_unset):
The 2nd arg to zebra_redistribute_send is now zclient instead of
zclient->sock.
* isis_zebra.h (isis_zebra_finish): Remove declaration of unused
function.
* isis_zebra.c (isis_zebra_route_add_ipv4): Call zclient_send_message
to send the message to zebra instead of calling writen directly, since
zclient_send_message understands non-blocking I/O and will manage
the buffer queue appropriately.
(isis_zebra_finish): Remove unused function, particularly since
the zclient_free function has been removed.
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* (global): Fix up list loops to match changes in lib/linklist,
and some basic auditing of usage.
* configure.ac: define QUAGGA_NO_DEPRECATED_INTERFACES
* HACKING: Add notes about deprecating interfaces and commands.
* lib/linklist.h: Add usage comments.
Rename getdata macro to listgetdata.
Rename nextnode to listnextnode and fix its odd behaviour to be
less dangerous.
Make listgetdata macro assert node is not null, NULL list entries
should be bug condition.
ALL_LIST_ELEMENTS, new macro, forward-referencing macro for use
with for loop, Suggested by Jim Carlson of Sun.
Add ALL_LIST_ELEMENTS_RO for cases which obviously do not need the
"safety" of previous macro.
LISTNODE_ADD and DELETE macros renamed to ATTACH, DETACH, to
distinguish from the similarly named functions, and reflect their
effect better.
Add a QUAGGA_NO_DEPRECATED_INTERFACES define guarded section
with the old defines which were modified above,
for backwards compatibility - guarded to prevent Quagga using it..
* lib/linklist.c: fix up for linklist.h changes.
* ospf6d/ospf6_abr.c: (ospf6_abr_examin_brouter) change to a single
scan of the area list, rather than scanning all areas first for
INTER_ROUTER and then again for INTER_NETWORK. According to
16.2, the scan should be area specific anyway, and further
ospf6d does not seem to implement 16.3 anyway.
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Fix problems when netlink interfaces are renamed (same ifindex used
for a new interface). Start cleaning up some problems with the way
interface names are handled.
* interface.c: (if_new_intern_ifindex) Remove obsolete function.
(if_delete_update) After distributing the interface deletion message,
set ifp->ifindex to IFINDEX_INTERNAL.
(if_dump_vty) Detect pseudo interface by checking if ifp->ifindex is
IFINDEX_INTERNAL.
(zebra_interface) Check return code from interface_cmd.func.
Do not set internal ifindex values to if_new_intern_ifindex(),
since we now use IFINDEX_INTERNAL for all pseudo interfaces.
* kernel_socket.c: (ifm_read) Fix code and comments to reflect that
all internal interfaces now have ifp->ifindex set to IFINDEX_INTERNAL.
* rt_netlink.c: (set_ifindex) New function used to update ifp->ifindex.
Detects interface rename events by checking if that ifindex is already
being used. If it is, delete the old interface before assigning
the ifindex to the new interface.
(netlink_interface, netlink_link_change) Call set_ifindex to update
the ifindex.
* if.h: Remove define for IFINDEX_INTERNBASE and add define
IFINDEX_INTERNAL 0, since all internal (i.e. non-kernel) pseudo-
interfaces should have ifindex set to 0.
(if_new) Remove function.
(if_delete_retain) New function to delete an interface without
removing from iflist and freeing the structure.
(ifname2ifindex) New function.
* if.c: (if_new) Remove function (absorb into if_create).
(if_create) Replace function if_new with call to calloc.
Set ifp->ifindex to IFINDEX_INTERNAL. Fix off-by-one error
in assert to check length of interface name. Add error message
if interface with this name already exists.
(if_delete_retain) New function to delete an interface without
removing from iflist and freeing the structure.
(if_delete) Implement with help of if_delete_retain.
(ifindex2ifname) Reimplement using if_lookup_by_index.
(ifname2ifindex) New function to complement ifindex2ifname.
(interface) The interface command should check the name length
and fail with a warning message if it is too long.
(no_interface) Fix spelling in warning message.
(if_nametoindex) Reimplement using if_lookup_by_name.
(if_indextoname, ifaddr_ipv4_lookup) Reimplement using
if_lookup_by_index.
* bgp_zebra.c: (bgp_interface_delete) After deleting, set ifp->ifindex
to IFINDEX_INTERNAL.
* isis_zebra.c: (isis_zebra_if_del) Call if_delete_retain instead
of if_delete, since it is generally not safe to remove interface
structures. After deleting, set ifp->ifindex to IFINDEX_INTERNAL.
(zebra_interface_if_lookup) Tighten up code.
* ospf6_zebra.c: (ospf6_zebra_if_del) Previously, this whole function
was commented out. But this is not safe: we should at least update
the ifindex when the interface is deleted. So the new version
updates the interface status and sets ifp->ifindex to
IFINDEX_INTERNAL.
(ospf6_zebra_route_update) Use if_indextoname properly.
* ospf_vty.c: (show_ip_ospf_interface_sub) Show ifindex and interface
flags to help with debugging.
* ospf_zebra.c: (ospf_interface_delete) After deleting, set ifp->ifindex
to IFINDEX_INTERNAL.
(zebra_interface_if_lookup) Make function static. Tighten up code.
* rip_interface.c: (rip_interface_delete) After deleting, set
ifp->ifindex to IFINDEX_INTERNAL.
* ripng_interface.c: (ripng_interface_delete) After deleting, set
ifp->ifindex to IFINDEX_INTERNAL.
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-> "disable-connected-check".
[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_zebra.c: (bgp_interface_address_add) sync to zclient changes
(bgp_interface_address_delete) ditto.
(bgp_zebra_announce) ditto.
(bgp_zebra_withdraw) ditto.
* isis_zebra.c: Sync with zclient changes.
* zclient.c (zapi_ipv4_route) Follow Sowmini's lead and describe
message format.
* ospf6_zebra.c: Sync to zclient changes
* ospf_zebra.c: Sync with lib/zclient changes
* rip_zebra.c: sync with zclient changes.
* rip_interface.c: ditto.
* ripng_{interface,zebra}.c: sync with zclient changes
2004-05-08 Sowmini Varadhan <sowmini.varadhan@sun.com>
* zclient.c: (zapi_ipv4_add) collapsed into zapi_ipv4_route
(zapi_ipv4_delete) ditto.
(zapi_ipv4_route) add/delete a route by way of cmd arg.
(zapi_ipv6_add) collapsed into zapi_ipv6_route.
(zapi_ipv6_delete) ditto.
(zapi_ipv6_route) add/delete a route by way of cmd arg.
(zebra_interface_address_delete_read) collapsed into
zebra_interface_address_read.
(zebra_interface_address_delete_read) ditto.
(zebra_interface_address_read) read address add/delete messages
by way of type argument. Describe command message format.
(zebra_interface_add_read) Unconditionally read new ifmtu6 field.
Describe command message format.
(zebra_interface_state_read) Unconditionally read new ifmtu6 field.
(zclient_redistribute_set) Collapsed into zclient_redistribute
(zclient_redistribute_unset) ditto
(zclient_redistribute) set/unset redistribution.
(zclient_redistribute_default_set) Collapsed into
zclient_redistribute_default.
(zclient_redistribute_default_unset) ditto.
(zclient_redistribute_default) Redistribute default set/unset.
* zclient.h: delete zapi_ipv{4,6}_add, zapi_ipv{4,6}_delete. Add
zapi_ipv{4,6}_route. delete zclient_redistribute_set/unset. Add
zclient_redistribute. Ditto for
zclient_redistribute_default_{set/unset}.
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