2006-09-14 Paul Jakma <paul.jakma@sun.com>
* (general) Fix some niggly issues around 'shutdown' and clearing
by adding a Clearing FSM wait-state and a hidden 'Deleted'
FSM state, to allow deleted peers to 'cool off' and hit 0
references. This introduces a slow memory leak of struct peer,
however that's more a testament to the fragility of the
reference counting than a bug in this patch, cleanup of
reference counting to fix this is to follow.
* bgpd.h: Add Clearing, Deleted states and Clearing_Completed
and event.
* bgp_debug.c: (bgp_status_msg[]) Add strings for Clearing and
Deleted.
* bgp_fsm.h: Don't allow timer/event threads to set anything
for Deleted peers.
* bgp_fsm.c: (bgp_timer_set) Add Clearing and Deleted. Deleted
needs to stop everything.
(bgp_stop) Remove explicit fsm_change_status call, the
general framework handles the transition.
(bgp_start) Log a warning if a start is attempted on a peer
that should stay down, trying to start a peer.
(struct .. FSM) Add Clearing_Completed
events, has little influence except when in state
Clearing to signal wait-state can end.
Add Clearing and Deleted states, former is a wait-state,
latter is a placeholder state to allow peers to disappear
quietly once refcounts settle.
(bgp_event) Try reduce verbosity of FSM state-change debug,
changes to same state are not interesting (Established->Established)
Allow NULL action functions in FSM.
* bgp_packet.c: (bgp_write) Use FSM events, rather than trying
to twiddle directly with FSM state behind the back of FSM.
(bgp_write_notify) ditto.
(bgp_read) Remove the vague ACCEPT_PEER peer_unlock, or else
this patch crashes, now it leaks instead.
* bgp_route.c: (bgp_clear_node_complete) Clearing_Completed
event, to end clearing.
(bgp_clear_route) See extensive comments.
* bgpd.c: (peer_free) should only be called while in Deleted,
peer refcounting controls when peer_free is called.
bgp_sync_delete should be here, not in peer_delete.
(peer_delete) Initiate delete.
Transition to Deleted state manually.
When removing peer from indices that provide visibility of it,
take great care to be idempotent wrt the reference counting
of struct peer through those indices.
Use bgp_timer_set, rather than replicating.
Call to bgp_sync_delete isn't appropriate here, sync can be
referenced while shutting down and finishing deletion.
(peer_group_bind) Take care to be idempotent wrt list references
indexing peers.
2006-05-23 Paul Jakma <paul.jakma@sun.com>
* bgp_vty.c: (neighbor_update_source_cmd) Expand tab completion
to make it clear it takes both address and ifname.
2006-03-19 Paul Jakma <paul.jakma@sun.com>
* bgpd/bgp_vty.c: Add includes to get several structs we want
to provide usage statistics on.
(show_bgp_memory_cmd) Show memory usage stats for various
notable fixed size objects. Using mtype_stats_alloc and
mtype_memstr recently added to memory.c.
(bgp_show_summary) Report some additional stats specific to
the given BGP instance and/or AFI/SAFI such as table counts,
peers, rsclients and peer-groups.
(bgp_vty_init) Install show_bgp_memory_cmd.
2006-02-21 Paul Jakma <paul.jakma@sun.com>
* bgp_vty.c: (bgp_show_summary) Add a 'Clrng' sub-description
to state of peer while it's suppressed due to clearing.
2006-02-21 Paul Jakma <paul.jakma@sun.com>
* bgpd.h: move the clear_node_queue to be peer specific.
Add a new peer status flag, PEER_STATUS_CLEARING.
* bgp_table.h: (struct bgp_table) Add fields to record afi,
safi of the table.
(bgp_table_init) Take afi and safi to create table for.
* bgp_table.c: (bgp_table_init) record the afi and safi.
* bgp_nexthop.c: Update all calls to bgp_table_init.
* bgp_vty.c: ditto.
* bgpd.c: ditto.
* bgp_fsm.c: (bgp_timer_set) dont bring up a session which is
clearing.
* bgp_route.c: (general) Update all bgp_table_init calls.
(bgp_process_{rsclient,main}) clear_node is serialised
via PEER_STATUS_CLEARING and fsm now.
(struct bgp_clear_node_queue) can be removed. struct bgp_node
can be the queue item data directly, as struct peer can be
kept in the new wq global user data and afi/safi can be
retrieved via bgp_node -> bgp_table.
(bgp_clear_route_node) fix to get peer via wq->spec.data,
afi/safi via bgp_node->bgp_table.
(bgp_clear_node_queue_del) no more item data to delete, only
unlock the bgp_node.
(bgp_clear_node_complete) only need to unset CLEARING flag
and unlock struct peer.
(bgp_clear_node_queue_init) queue attaches to struct peer
now. record peer name as queue name.
(bgp_clear_route_table) If queue transitions to active,
serialise clearing by setting PEER_STATUS_CLEARING rather
than plugging process queue, and lock peer while queue
active.
Update to pass only bgp_node as per-queue-item specific data.
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.
* zebra.h: Declare new functions zebra_route_string() and
zebra_route_char().
* log.c: (zroute_lookup,zebra_route_string,zebra_route_char) New
functions to map zebra route numbers to strings.
* zebra_vty.c: (route_type_str) Remove obsolete function: use new
library function zebra_route_string() instead. Note that there
are a few differences: for IPv6 routes, we now get "ripng" and
"ospf6" instead of the old behavior ("rip" and "ospf").
(route_type_char) Remove obsolete function: ues new library function
zebra_route_char() instead. Note that there is one difference:
the old function returned 'S' for a ZEBRA_ROUTE_SYSTEM route,
whereas the new one returns 'X'.
(vty_show_ip_route_detail,vty_show_ipv6_route_detail) Replace
route_type_str() with zebra_route_string().
(vty_show_ip_route,vty_show_ipv6_route) Replace route_type_char()
with zebra_route_char().
* bgp_vty.c: (bgp_config_write_redistribute) Use new library function
zebra_route_string instead of a local hard-coded table.
* ospf6_asbr.c: Remove local hard-coded tables zroute_name and
zroute_abname. Change the ZROUTE_NAME macro to use new library
function zebra_route_string(). Remove the ZROUTE_ABNAME macro.
(ospf6_asbr_external_route_show): Replace ZROUTE_ABNAME() with
a call to zebra_route_char(), and be sure to fix the format string,
since we now have a char instead of a char *.
* ospf6_zebra.c: Remove local hard-coded tables zebra_route_name and
zebra_route_abname. Note that the zebra_route_name[] table
contained mixed-case strings, whereas the zebra_route_string()
function returns lower-case strings.
(ospf6_zebra_read_ipv6): Change debug message to use new library
function zebra_route_string() instead of zebra_route_name[].
(show_zebra): Use new library function zebra_route_string() instead
of zebra_route_name[].
* ospf_dump.c: Remove local hard-coded table ospf_redistributed_proto.
(ospf_redist_string) New function implemented using new library
function zebra_route_string(). Note that there are a few differences
in the output that will result: the new function returns strings
that are lower-case, whereas the old table was mixed case. Also,
the old table mapped ZEBRA_ROUTE_OSPF6 to "OSPFv3", whereas the
new function returns "ospf6".
* ospfd.h: Remove extern struct message ospf_redistributed_proto[],
and add extern const char *ospf_redist_string(u_int route_type)
instead.
* ospf_asbr.c: (ospf_external_info_add) In two messages, use
ospf_redist_string instead of LOOKUP(ospf_redistributed_proto).
* ospf_vty.c: Remove local hard-coded table distribute_str.
(config_write_ospf_redistribute,config_write_ospf_distribute): Use
new library function zebra_route_string() instead of distribute_str[].
* ospf_zebra.c: (ospf_redistribute_set,ospf_redistribute_unset,
ospf_redistribute_default_set,ospf_redistribute_check)
In debug messages, use ospf_redist_string() instead of
LOOKUP(ospf_redistributed_proto).
* rip_zebra.c: (config_write_rip_redistribute): Remove local hard-coded
table str[]. Replace str[] with calls to new library function
zebra_route_string().
* ripd.c: Remove local hard-coded table route_info[].
(show_ip_rip) Replace uses of str[] with calls to new library
functions zebra_route_char and zebra_route_string.
* ripng_zebra.c: (ripng_redistribute_write) Remove local hard-coded
table str[]. Replace str[i] with new library function
zebra_route_string(i).
* ripngd.c: Remove local hard-coded table route_info[].
(show_ipv6_ripng) Use new library function zebra_route_char() instead
of table route_info[].
* (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.
* bgpd/(general) refcount struct peer and bgp_info, hence allowing us
add work_queues for bgp_process.
* bgpd/bgp_route.h: (struct bgp_info) Add 'lock' field for refcount.
Add bgp_info_{lock,unlock} helper functions.
Add bgp_info_{add,delete} helpers, to remove need for
users managing locking/freeing of bgp_info and bgp_node's.
* bgpd/bgp_table.h: (struct bgp_node) Add a flags field, and
BGP_NODE_PROCESS_SCHEDULED to merge redundant processing of
nodes.
* bgpd/bgp_fsm.h: Make the ON/OFF/ADD/REMOVE macros lock and unlock
peer reference as appropriate.
* bgpd/bgp_damp.c: Remove its internal prototypes for
bgp_info_delete/free. Just use bgp_info_delete.
* bgpd/bgpd.h: (struct bgp_master) Add work_queue pointers.
(struct peer) Add reference count 'lock'
(peer_lock,peer_unlock) New helpers to take/release reference
on struct peer.
* bgpd/bgp_advertise.c: (general) Add peer and bgp_info refcounting
and balance how references are taken and released.
(bgp_advertise_free) release bgp_info reference, if appropriate
(bgp_adj_out_free) unlock peer
(bgp_advertise_clean) leave the adv references alone, or else
call bgp_advertise_free cant unlock them.
(bgp_adj_out_set) lock the peer on new adj's, leave the reference
alone otherwise. lock the new bgp_info reference.
(bgp_adj_in_set) lock the peer reference
(bgp_adj_in_remove) and unlock it here
(bgp_sync_delete) make hash_free on peer conditional, just in
case.
* bgpd/bgp_fsm.c: (general) document that the timers depend on
bgp_event to release a peer reference.
(bgp_fsm_change_status) moved up the file, unchanged.
(bgp_stop) Decrement peer lock as many times as cancel_event
canceled - shouldnt be needed but just in case.
stream_fifo_clean of obuf made conditional, just in case.
(bgp_event) always unlock the peer, regardless of return value
of bgp_fsm_change_status.
* bgpd/bgp_packet.c: (general) change several bgp_stop's to BGP_EVENT's.
(bgp_read) Add a mysterious extra peer_unlock for ACCEPT_PEERs
along with a comment on it.
* bgpd/bgp_route.c: (general) Add refcounting of bgp_info, cleanup
some of the resource management around bgp_info. Refcount peer.
Add workqueues for bgp_process and clear_table.
(bgp_info_new) make static
(bgp_info_free) Ditto, and unlock the peer reference.
(bgp_info_lock,bgp_info_unlock) new exported functions
(bgp_info_add) Add a bgp_info to a bgp_node in correct fashion,
taking care of reference counts.
(bgp_info_delete) do the opposite of bgp_info_add.
(bgp_process_rsclient) Converted into a work_queue work function.
(bgp_process_main) ditto.
(bgp_processq_del) process work queue item deconstructor
(bgp_process_queue_init) process work queue init
(bgp_process) call init function if required, set up queue item
and add to queue, rather than calling process functions directly.
(bgp_rib_remove) let bgp_info_delete manage bgp_info refcounts
(bgp_rib_withdraw) ditto
(bgp_update_rsclient) let bgp_info_add manage refcounts
(bgp_update_main) ditto
(bgp_clear_route_node) clear_node_queue work function, does
per-node aspects of what bgp_clear_route_table did previously
(bgp_clear_node_queue_del) clear_node_queue item delete function
(bgp_clear_node_complete) clear_node_queue completion function,
it unplugs the process queues, which have to be blocked while
clear_node_queue is being processed to prevent a race.
(bgp_clear_node_queue_init) init function for clear_node_queue
work queues
(bgp_clear_route_table) Sets up items onto a workqueue now, rather
than clearing each node directly. Plugs both process queues to
avoid potential race.
(bgp_static_withdraw_rsclient) let bgp_info_{add,delete} manage
bgp_info refcounts.
(bgp_static_update_rsclient) ditto
(bgp_static_update_main) ditto
(bgp_static_update_vpnv4) ditto, remove unneeded cast.
(bgp_static_withdraw) see bgp_static_withdraw_rsclient
(bgp_static_withdraw_vpnv4) ditto
(bgp_aggregate_{route,add,delete}) ditto
(bgp_redistribute_{add,delete,withdraw}) ditto
* bgpd/bgp_vty.c: (peer_rsclient_set_vty) lock rsclient list peer
reference
(peer_rsclient_unset_vty) ditto, but unlock same reference
* bgpd/bgpd.c: (peer_free) handle frees of info to be kept for lifetime
of struct peer.
(peer_lock,peer_unlock) peer refcount helpers
(peer_new) add initial refcounts
(peer_create,peer_create_accept) lock peer as appropriate
(peer_delete) unlock as appropriate, move out some free's to
peer_free.
(peer_group_bind,peer_group_unbind) peer refcounting as
appropriate.
(bgp_create) check CALLOC return value.
(bgp_terminate) free workqueues too.
* lib/memtypes.c: Add MTYPE_BGP_PROCESS_QUEUE and
MTYPE_BGP_CLEAR_NODE_QUEUE
* bgp_aspath.[ch], bgp_route.c, bgp_vty.c, bgpd.[ch]: Allow to enable
the length of confederation path segments to be included during the
as-path length check in the best path decision.
* (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.
bgpd.[ch]: Add BGP_INFO_STALE flag and end-of-rib support. "bgp
graceful-restart" commands added. Show numbers of individual
messages in "show ip bgp neighbor" command. Final pieces of graceful
restart.
[merge from GNU Zebra]
* bgpd.[ch], bgp_nexthop.c, bgp_snmp.c: Remove useless bgp_get_master()
function.
* bgp_packet.c: MP AFI_IP update and withdraw parsing.
* bgp_fsm.c: Reset peer synctime in bgp_stop(). bgp_fsm_change_status()
is better place to log about peer status change than bgp_event().
Log in bgp_connect_success().
* bgp_vty.c: Fix typo in comment.
* bgp_attr.c: Better log about unknown attribute.
[merge from GNU Zebra]
* buffer.h: Fix comment on buffer_getstr to reflect that it now
uses XMALLOC.
* buffer.c: (buffer_getstr) Use XMALLOC(MTYPE_TMP) instead of malloc.
* filter.c: (access_list_remark,ipv6_access_list_remark) Use
argv_concat instead of buffer_getstr.
* if.c: (interface_desc) Use argv_concat instead of buffer_getstr.
* plist.c: (ip_prefix_list_description,ipv6_prefix_list_description)
Use argv_concat instead of buffer_getstr.
* bgp_filter.c: (ip_as_path,no_ip_as_path) Use argv_concat instead
of buffer_getstr.
* bgp_route.c: (bgp_show_regexp) Fix memory leak: need to free string
returned by buffer_getstr.
(bgp_show_community) Must use XFREE instead of free on string
returned by buffer_getstr.
* bgp_routemap.c: (set_community) Must use XFREE instead of free
on string returned by buffer_getstr.
* bgp_vty.c: (neighbor_description) Use argv_concat instead of
buffer_getstr.
* (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.
(at Technical University of Madrid as part of Euro6ix Project)
Enhanced Route Server functionality and Route-Maps:
* bgpd/bgpd.h: Modified 'struct peer' and 'struct bgp_filter' to
support rs-clients. A 'struct bgp_table *rib' has been added to the
first (to mantain a separated RIB for each rs-client) and two new
route-maps have been added to the last (for import/export policies).
Added the following #defines: RMAP_{IN|OUT|IMPORT|EXPORT|MAX},
PEER_RMAP_TYPE_{IMPORT|EXPORT} and BGP_CLEAR_SOFT_RSCLIENT.
* bgpd/bgpd.c: Modified the functions that create/delete/etc peers in
order to consider the new fields included in 'struct peer' for
supporting rs-clients, i.e. the import/export route-maps and the
'struct bgp_table'.
* bgpd/bgp_route.{ch}: Modified several functions related with
receiving/sending announces in order to support the new Route Server
capabilities.
Function 'bgp_process' has been reorganized, creating an auxiliar
function for best path selection ('bgp_best_selection').
Modified 'bgp_show' and 'bgp_show_route' for displaying information
about any RIB (and not only the main bgp RIB).
Added commands for displaying information about RS-clients RIBs:
'show bgp rsclient (A.B.C.D|X:X::X:X)', 'show bgp rsclient
(A.B.C.D|X:X::X:X) X:X::X:X/M', etc
* bgpd/bgp_table.{ch}: The structure 'struct bgp_table' now has two
new fields: type (which can take the values BGP_TABLE_{MAIN|RSCLIENT})
and 'void *owner' which points to 'struct bgp' or 'struct peer' which
owns the table.
When creating a new bgp_table by default 'type=BGP_TABLE_MAIN' is set.
* bgpd/bgp_vty.c: The commands 'neighbor ... route-server-client' and
'no neighbor ... route-server-client' now not only set/unset the flag
PEER_FLAG_RSERVER_CLIENT, but they create/destroy the 'struct
bgp_table' of the peer. Special actions are taken for peer_groups.
Command 'neighbor ... route-map WORD (in|out)' now also supports two
new kinds of route-map: 'import' and 'export'.
Added commands 'clear bgp * rsclient', etc. These commands allow a new
kind of soft_reconfig which affects only the RIB of the specified
RS-client.
Added commands 'show bgp rsclient summary', etc which display a
summary of the rs-clients configured for the corresponding address
family.
* bgpd/bgp_routemap.c: A new match statement is available,
'match peer (A.B.C.D|X:X::X:X)'. This statement can only be used in
import/export route-maps, and it matches when the peer who announces
(when used in an import route-map) or is going to receive (when used
in an export route-map) the route is the same than the one specified
in the statement.
For peer-groups the statement matches if the specified peer is member
of the peer-group.
A special version of the command, 'match peer local', matches with
routes originated by the Route Server (defined with 'network ...',
redistributed routes and default-originate).
* lib/routemap.{ch}: Added a new clause 'call NAME' for use in
route-maps. It jumps into the specified route-map and when it returns
the first route-map ends if the called RM returns DENY_MATCH, or
continues in other case.
* Better 'show bgp' support for views (eg ipv6), see [quagga-dev 238]
* bgpd/bgp_route.c: (bgp_show) Take a struct bgp argument instead of
view string.
(bgp_show_neighbor_route) Take a struct peer argument instead of
ip string.
(peer_adj_routes) ditto
(show_adj_routes) ditto
(peer_lookup_in_view) new function to return appropriate struct
peer for a given view string.
(misc) Fixup all calls to above to reflect new calling arguments,
and use peer_lookup_in_view as needed. Additional commands
installed to use expanded functionality above, existing commands
modified to suit as well.
* bgpd/bgp_vty.c: 2 new aliases.
* bgp_vty.c: install the neighbor_set_peer_group_cmd,
neighbor_soft_reconfiguration_cmd and neighbor_unsuppress_map_cmd
family of commands into the VPNv4 address family config node.
