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2009-07-19[bgpd] Stability fixes including bugs 397, 492Chris Caputo
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().
2006-06-15[lib] Experimental: have XFREE NULL out the freed pointerPaul Jakma
2006-06-15 Paul Jakma <paul.jakma@sun.com> * memory.h: Experimental, have XFREE macro NULL out the freed pointer.
2006-03-30[lib/memory] Add mallinfo supportPaul Jakma
2006-02-15 Paul Jakma <paul.jakma@sun.com> * configure.ac: Check for mallinfo, being careful to link test so we can detect things like umem being used (which doesn't provide a mallinfo). * lib/memory.c: (mtype_memstr) new helper function to return human friendly string for a byte count. (mtype_stats_alloc) new function, for users to retrieve number of objects allocated. (show_memory_mallinfo) New function, show mallinfo statistics if available. (show_memory_all_cmd) Call show_memory_mallinfo, if mallinfo is available. * lib/memory.h: Export mtype_memstr and mtype_stats_alloc. Provide a define for a reasonable buffer size for mtype_memstr.
2005-05-062005-05-06 Paul Jakma <paul@dishone.st>paul
* (general) extern and static'ification of functions in code and header. Cleanup any definitions with unspecified arguments. Add casts for callback assignments where the callback is defined, typically, as passing void *, but the function being assigned has some other pointer type defined as its argument, as gcc complains about casts from void * to X* via function arguments. Fix some old K&R style function argument definitions. Add noreturn gcc attribute to some functions, as appropriate. Add unused gcc attribute to some functions (eg ones meant to help while debugging) Add guard defines to headers which were missing them. * command.c: (install_node) add const qualifier, still doesnt shut up the warning though, because of the double pointer. (cmp_node) ditto * keychain.c: (key_str2time) Add GET_LONG_RANGE() macro, derived fromn vty.h ones to fix some of the (long) < 0 warnings. * thread.c: (various) use thread_empty (cpu_record_hash_key) should cast to uintptr_t, a stdint.h type * vty.h: Add VTY_GET_IPV4_ADDRESS and VTY_GET_IPV4_PREFIX so they removed from ospfd/ospf_vty.h * zebra.h: Move definition of ZEBRA_PORT to here, to remove dependence of lib on zebra/zserv.h
2005-04-272005-04-27 Paul Jakma <paul.jakma@sun.com>paul
* memory.h: memtypes is built source, default includes points to top_builddir, so we should refer to lib/memtypes.h
2005-04-222005-04-22 Paul Jakma <paul.jakma@sun.com>paul
* memory.h: Move include of memtypes.h to after the definition of struct memory_list, gcc 4.0 doesn't like arrays of incomplete types.
2005-04-152005-04-15 Paul Jakma <paul@dishone.st>paul
* memtypes.c: The new, unified location for memory type definitions. The memtype enum and declarations for memory_lists are built from this automatically and put into memtypes.h. * memtypes.awk: New script to generate memtypes.h from memtypes.c * memory.h: Finally, the enum can banished! * memory.c: Finally, the seperate mtype memory_list definitions can be banished! (log_memstats) Increase width of fields (show_memory_zebra_cmd) display zebra specific memory types. Increase width of fields. * Makefile.am: Add memtypes.{c,h}, add BUILT_SOURCES for memtypes.h Add a rule to build memtypes.h using memtypes.awk. Add memtypes.awk to EXTRA_DIST.
2004-11-162004-11-16 Andrew J. Schorr <ajschorr@alumni.princeton.edu>ajs
* memory.h: Fix prototype for memory_init(). * memory.c: Declare many functions and data structures static instead of global. Fix prototype for memory_init().
2004-10-312004-10-31 Paul Jakma <paul@dishone.st>paul
* memory.h: Add MTYPE_THREAD_FUNCNAME and MTYPE_THREAD_STATS * thread.c: Update stats and funcname alloc/free to use previous specific memory type defines
2004-10-102004-10-10 Paul Jakma <paul@dishone.st>paul
* version.h.in: (pid_output*) add const qualifier. * command.h: Change DEFUN func to take const char *[] rather than char **, to begin process of fixing compile warnings in lib/. Nearly all other changes in this commit follow from this change. * buffer.{c,h}: (buffer_write) pointer-arithmetic is gccism, take const void * and cast an automatic const char *p to it. (buffer_putstr) add const * command.c: (zencrypt) const qualifier (cmd_execute_command_real) ditto (cmd_execute_command_strict) ditto (config_log_file) ditto. Fix leak of getcwd() returned string. * memory.{c,h}: Add MTYPE_DISTRIBUTE_IFNAME for struct dist ifname. * distribute.{c,h}: Update with const qualifier. (distribute_free) use MTYPE_DISTRIBUTE_IFNAME (distribute_lookup) Cast to char *, note that it's ok. (distribute_hash_alloc) use MTYPE_DISTRIBUTE_IFNAME. (distribute_get) Cast to char *, note that it's ok. * filter.c: Update with const qualifier. * if.{c,h}: ditto. * if_rmap.{c,h}: ditto. (if_rmap_lookup) Cast to char *, note that it's ok. (if_rmap_get) ditto. * log.{c,h}: Update with const qualifier. * plist.{c,h}: ditto. * routemap.{c,h}: ditto. * smux.{c,h}: ditto. Fix some signed/unsigned comparisons. * sockopt.c: (getsockopt_cmsg_data) add return for error case. * vty.c: Update with const qualifier.
2004-10-04First small part of lib cleanup. Mainly "constification" of arguments andhasso
adding FIXME's.
2004-06-12OK, here it is - irdp support. But don't expect me to fix any bugs in it.hasso
2003-12-23Merge isisd into the Quagga's framework:jardin
- add privs support - use misc quagga's definitions - make it compile"able" - fix segfault cases related to hostname() - add debug isis xxx command This patch has been approved by Paul Jakma.
2003-06-042003-06-04 Paul Jakma <paul@dishone.st>paul
* Merge of zebra privileges
2003-05-25Ripngd part of 6Wind patch.hasso
2002-12-13Initial revisionpaul