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2022-03-09Merge commit 'd5a32563' into haugesundMaria Matejka
2022-03-09Fixed resource initialization in unit testsMaria Matejka
2022-03-09Merge commit '0c59f7ff' into haugesundMaria Matejka
2022-03-09Revert "Bound allocated pages to resource pools with page caches to avoid ↵Maria Matejka
unnecessary syscalls" This reverts commit 7f0e59820899c30a243c18556ce2e3fb72d6d221.
2022-03-09Revert "Multipage allocation"Maria Matejka
This reverts commit 6cd37713781a3092f8166b2178fae35cbfec1e28.
2022-03-09Single-threaded version of sark-branch memory page managementMaria Matejka
2022-03-02Introducing an universal temporary linpool flushed after every taskMaria Matejka
2022-03-02Merge commit '2c13759136951ef0e70a3e3c2b2d3c9a387f7ed9' into haugesundMaria Matejka
2022-02-09NEWS and version updateOndrej Zajicek (work)
2022-02-08Alloc: Use posix_memalign() instead of aligned_alloc()Ondrej Zajicek (work)
For compatibility with older systems use posix_memalign(). We can switch to aligned_alloc() when we commit to C11 for multithreading.
2022-02-08Netlink: Minor cleanupOndrej Zajicek (work)
2022-01-17Netlink: Add option to specify netlink socket receive buffer sizeOndrej Zajicek (work)
Add option 'netlink rx buffer' to specify netlink socket receive buffer size. Uses SO_RCVBUFFORCE, so it can override rmem_max limit. Thanks to Trisha Biswas and Michal for the original patches.
2022-01-15Netlink: Add another workaround for older kernel headersOndrej Zajicek (work)
Unfortunately, SOL_NETLINK is both recently added and arch-dependent, so we cannot just define it.
2022-01-14Netlink: Add workaround for older kernel headersOndrej Zajicek (work)
2022-01-14Netlink: Enable strict checking for KRT dumpsOndrej Zajicek (work)
Add strict checking for netlink KRT dumps to avoid PMTU cache records from FNHE table dump along with KRT. Linux Kernel added FNHE table dump to the netlink API in patch: https://patchwork.ozlabs.org/project/netdev/patch/8d3b68cd37fb5fddc470904cdd6793fcf480c6c1.1561131177.git.sbrivio@redhat.com/ Therefore, since Linux 5.3 these route cache entries are dumped together with regular routes during periodic KRT scans, which in some cases may be huge amount of useless data. This can be avoided by using strict checking for netlink dumps: https://lore.kernel.org/netdev/20181008031644.15989-1-dsahern@kernel.org/ The patch mitigates the risk of receiving unknown and potentially large number of FNHE records that would block BIRD I/O in each sync. There is a known issue caused by the GRE tunnels on Linux that seems to be creating one FNHE record for each destination IP address that is routed through the tunnel, even when the PMTU equals to GRE interface MTU. Thanks to Tomas Hlavacek for the original patch.
2022-01-14Netlink: Explicitly skip received cloned routesOndrej Zajicek (work)
Kernel uses cloned routes to keep route cache entries, but reports them together with regular routes. They were skipped implicitly as they do not have rtm_protocol filled. Add explicit check for cloned flag and skip such routes explicitly. Also, improve debug logs of skipped routes.
2022-01-08IO: Support nonlocal bind in socket interfaceAlexander Zubkov
Add option to socket interface for nonlocal binding, i.e. binding to an IP address that is not present on interfaces. This behaviour is enabled when SKF_FREEBIND socket flag is set. For Linux systems, it is implemented by IP_FREEBIND socket flag. Minor changes done by commiter.
2022-01-05Netlink: Do not ignore dead routes from BIRDOndrej Zajicek (work)
Currently, BIRD ignores dead routes to consider them absent. But it also ignores its own routes and thus it can not correctly manage such routes in some cases. This patch makes an exception for routes with proto bird when ignoring dead routes, so they can be properly updated or removed. Thanks to Alexander Zubkov for the original patch.
2022-01-05Netlink: Improve multipath parsing errorsOndrej Zajicek (work)
Function nl_parse_multipath() should handle errors internally.
2021-12-27BSD: Assume onlink flag on ifaces with only host addressesOndrej Zajicek (work)
The BSD kernel does not support the onlink flag and BIRD does not use direct routes for next hop validation, instead depends on interface address ranges. We would like to handle PtMP cases with only host addresses configured, like: ifconfig wg0 192.168.0.10/32 route add 192.168.0.4 -iface wg0 route add 192.168.0.8 -iface wg0 To accept BIRD routes with onlink next-hop, like: route 192.168.42.0/24 via 192.168.0.4%wg0 onlink BIRD would dismiss the route when receiving from the kernel, as the next-hop 192.168.0.4 is not part of any interface subnet and onlink flag is not kept by the BSD kernel. The commit fixes this by assuming that for routes received from the kernel, any next-hop is onlink on ifaces with only host addresses. Thanks to Stefan Haller for the original patch.
2021-11-24Directly mapped pages are kept for future use if temporarily not neededMaria Matejka
2021-10-13Preexport: No route modification, no linpool neededMaria Matejka
2021-10-13Multipage allocationMaria Matejka
We can also quite simply allocate bigger blocks. Anyway, we need these blocks to be aligned to their size which needs one mmap() two times bigger and then two munmap()s returning the unaligned parts. The user can specify -B <N> on startup when <N> is the exponent of 2, setting the block size to 2^N. On most systems, N is 12, anyway if you know that your configuration is going to eat gigabytes of RAM, you are almost forced to raise your block size as you may easily get into memory fragmentation issues or you have to raise your maximum mapping count, e.g. "sysctl vm.max_map_count=(number)".
2021-10-13CLI socket accept() may also fail and should produce some message, not a ↵Maria Matejka
coredump.
2021-09-10Bound allocated pages to resource pools with page caches to avoid ↵Maria Matejka
unnecessary syscalls
2021-09-10Debug output uses local buffer to avoid clashes between threads.Maria Matejka
2021-09-10Nest: Clean up main channel handlingOndrej Zajicek (work)
Remove assumption that main channel is the only channel.
2021-06-17Nest: Clean up main channel handlingOndrej Zajicek (work)
Remove assumption that main channel is the only channel.
2021-06-06sysdep: Add wrapper to get random bytes - updateOndrej Zajicek (work)
Simplify the code and fix an issue with getentropy() return value.
2021-06-06sysdep: Add wrapper to get random bytesToke Høiland-Jørgensen
Add a wrapper function in sysdep to get random bytes, and required checks in configure.ac to select how to do it. The configure script tries, in order, getrandom(), getentropy() and reading from /dev/urandom.
2021-05-10BSD: Propagate OS-level IFF_MULTICAST to internal IF_MULTICAST flagToke Høiland-Jørgensen
The BSD code did not propagate the OS-level IFF_MULTICAST flag to the Bird-internal IF_MULTICAST flag, which causes problems with Wireguard interfaces on FreeBSD. The Linux sysdep code does propagate the flag already, so just copy over the same check and flag update.
2021-04-19BSD: Fix invalid pointer derefence in logging codeStefan Haller
For logging purposes a stack allocated net_addr struct was passed by value as vararg (instead of the expected pointer). This resulted in a segfault when the specific error condition got logged.
2021-04-07Unix: Expand accepted ranges of iproute2 constantsOndrej Zajicek (work)
We support 32bit table and realm/flow ids, we should also accept them as constants. Thanks to Patrick Hemmer for the bugreport.
2021-03-30Routing table is now a resource allocated from its own poolMaria Matejka
This also fixes memory leaks from import/export tables being never cleaned up and freed.
2021-03-25Slab: head now uses bitmask for used/free nodes info instead of listsMaria Matejka
From now, there are no auxiliary pointers stored in the free slab nodes. This led to strange debugging problems if use-after-free happened in slab-allocated structures, especially if the structure's first member is a next pointer. This also reduces the memory needed by 1 pointer per allocated object. OTOH, we now rely on pages being aligned to their size's multiple, which is quite common anyway.
2021-03-18NEWS and version updatev2.0.8Ondrej Zajicek (work)
2021-03-12Rate-limit scheduling of work-eventsOndrej Zajicek (work)
In general, events are code handling some some condition, which is scheduled when such condition happened and executed independently from I/O loop. Work-events are a subgroup of events that are scheduled repeatedly until some (often significant) work is done (e.g. feeding routes to protocol). All scheduled events are executed during each I/O loop iteration. Separate work-events from regular events to a separate queue and rate limit their execution to a fixed number per I/O loop iteration. That should prevent excess latency when many work-events are scheduled at one time (e.g. simultaneous reload of many BGP sessions).
2021-02-10BGP: Add support for BGP hostname capabilityVincent Bernat
This is an implementation of draft-walton-bgp-hostname-capability-02. It is implemented since quite some time for FRR and in datacenter, this gives a nice output to avoid using IP addresses. It is disabled by default. The hostname is retrieved from uname(2) and can be overriden with "hostname" option. The domain name is never set nor displayed. Minor changes by committer.
2021-01-14Netlink: Ignore dead routesOndrej Zajicek (work)
With net.ipv4.conf.XXX.ignore_routes_with_linkdown sysctl, a user can ensure the kernel does not use a route whose target interface is down. Such route is marked with a 'dead' / RTNH_F_DEAD flag. Ignore these routes or multipath nexthops during scan. Thanks to Vincent Bernat for the original patch.
2021-01-07Kernel: Do not check templatesOndrej Zajicek (work)
So one can define kernel protocol template without channels. For other protocols, it is either irrelevant or already done. Thanks to Clemens Schrimpe for the bugreport.
2021-01-06Kernel: Fix handling of krt_realm with ECMP routesOndrej Zajicek (work)
For ECMP routes, RTA_FLOW attribute must be set per-nexthop, not per-route. Our corresponding krt_realm attribute is per-route. Thanks to Mikhail Petrov for the bugreport.
2020-11-25Log: Fix locking during log reconfigurationOndrej Zajicek (work)
The log subsystem should be locked earlier, as default_log_list() may internally manipulate with the current_log_list (if it is also a default log list).
2020-11-25Log: Reinitialize the static logging structuresOndrej Zajicek (work)
The static logging structures are reused, we need to reinitialize them otherwise add_tail() would fail in debug build. Reinitializing these structures should be fine as the list they belong to is being reinitialized on entry to the very same function. Thanks to Andreas Rammhold and Mikael Magnusson for patches.
2020-06-03Netlink: Fix parsing of MPLS multipath routesKazuki Yamaguchi
Add support for RTA_MULTIPATH attribute parsing for AF_MPLS routes. BIRD is capable of installing a multipath route into kernel on Linux, but it would not be seen because parsing fails. This made BIRD attempt to install the same route repeatedly. (The patch minorly updated by committer)
2020-06-03Log: Do not open logfiles when parse-and-exit option is activeOndrej Zajicek (work)
This is a quick workaround for an issue where configured logfiles are opened/created during parsing of a config file even when parse-and-exit option is active. We should later refactor the logging code to avoid opening log during parsing altogether.
2020-05-01Unix socket: Path length check directly before copying the path.Maria Matejka
This is not needed as the string is always short enough, anyway it may be needed in future and one strlen during BIRD start is cheap enough.
2020-05-01Nest: Added const to ea_show just to declare that this shouldn't really ↵Maria Matejka
change anything
2020-04-09Configuration strings are constant.Maria Matejka
This is merely a const propagation. There was no problem in there.
2020-03-07Netlink: Handle interfaces with missing broadcast addressesOndrej Zajicek (work)
2020-02-27BGP: Support for MD5SIG together with remote rangeOndrej Zajicek (work)
When dynamic BGP with remote range is configured, MD5SIG needs to use newer socket option (TCP_MD5SIG_EXT) to specify remote addres range for listening socket. Thanks to Adam Kułagowski for the suggestion.
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