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* ipcpd: Create new SDUs for DHT join retriesDimitri Staessens2017-11-071-15/+15
| | | | | | | | | | The DHT join operation left an SDU in the rdrbuff for a couple of seconds during retries, which may cause the system to block if there is heavy traffic. This patch releases the sdb when the write fails and creates a new packet for every retry. Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be> Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be>
* lib: Deprecate ouroboros_init and ourboros_finidimitri staessens2017-10-145-8/+9
| | | | | | | | | | | | | | This commit deprecates ouroboros_init and ouroboros_fini and adds them as a constructor or destructor, causing these function to be run automatically when a program that links to the library calls and exits main(). For this to fully work, the library had to be split so that we can avoid the irmd calling these functions (the IRMd has to create the shm structures on which these calls depend). The library is split in 3 parts: libouroboros-dev, libouroboros-irm and libouroboros-common. The latter is linked to the other two so that including libouroboros-dev or libouroboros-irm will also link libouroboros-common.
* ipcpd: Handle cancellation while writing LSAsdimitri staessens2017-10-071-1/+4
| | | | | | | | | | This adds a cleanup handler to ensure the lock is released in the event that the thread is cancelled during a write. An alternative solution could be to make the flow write in a non-blocking way (only the blocking write contains an execution path that has a cancellation point). Fixes #55
* lib: Cancel tpm threads instead of marking exitdimitri staessens2017-09-301-48/+65
| | | | | | | | | This makes the threadpool use pthread_cancel instead of setting an exit flag that threadpool managed threads check periodically. This drastically reduces CPU consumption in the irmd when running a lot of applications. It requires cancellation handlers in the ipcp and irmd to be implemented to ensure safe cancellation during operation and shutdown.
* ipcpd: normal: React to flow events in link state policySander Vrijders2017-09-293-4/+56
| | | | | | This will let the link state policy react to flow up and down events by notifying the PFFs of the routing instances of this event so they can take an appropriate action.
* ipcpd: normal: Add Loop-Free Alternates routingSander Vrijders2017-09-296-32/+199
| | | | | | This adds the Loop-Free Alternates (LFA) policy. In case a link goes down a LFA may be selected to route the SDUs on without causing loops instead of the main hop that just went down.
* Merged in sandervrijders/ouroboros/be-routing (pull request #617)Sander Vrijders2017-09-264-189/+288
|\ | | | | | | Be routing
| * ipcpd: normal: Add refcount to graph edgesSander Vrijders2017-09-263-22/+53
| | | | | | | | | | This adds a refcount to the graph edges so that it is only included in the calculation if both sides announced it.
| * ipcpd: normal: Keep index in vertex structSander Vrijders2017-09-252-27/+24
| | | | | | | | | | This keeps the index in the vertex struct so that is more easily available during Dijkstra.
| * ipcpd: normal: Simplify Dijkstra implementationSander Vrijders2017-09-251-25/+17
| | | | | | | | | | | | This simplifies the Dijkstra implementation by immediately setting the correct next hop during Dijkstra instead of looping through the list of predecessors afterwards.
| * ipcpd: normal: Simplify internal graph functionsSander Vrijders2017-09-251-38/+26
| | | | | | | | | | This simplifies several internal graph functions by passing an array of bools instead of an array of vertices.
| * ipcpd: normal: Return list as routing tableSander Vrijders2017-09-254-106/+197
| | | | | | | | | | | | This returns a list as routing table instead of a pointer to a pointer to a pointer, which simplifies the looping through the routing table and makes it more extensible for future additions.
* | Merged in sandervrijders/ouroboros/be-dht-fix (pull request #618)Sander Vrijders2017-09-261-3/+3
|\ \ | | | | | | | | | ipcpd: normal: Set clock to realtime clock
| * | ipcpd: normal: Set clock to realtime clockSander Vrijders2017-09-261-3/+3
| |/ | | | | | | | | | | A pthread_cond_wait was using the pthread_cond_clock and thereby timing out constantly, consuming 100% CPU. This changes it to use the realtime clock.
* / ipcpd: Add multiplier to scale scheduler threadsdimitri staessens2017-09-251-10/+11
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* ipcpd: Fix deadlock in DHTdimitri staessens2017-09-241-27/+41
| | | | | | | | | | | | | The lookup_update was waiting for the LU_INIT state to resolve under dht->lock which prevented that update. This PR fixes this bug, but leaves a (very rare) bug when the lookup_destroy is called while the lookup_update is waiting for the LU_INIT state to resolve. The solution also is a (harmless) lock inversion, but this is also not the best. Fixes #51 Fixes #52
* ipcpd: Add threadpool manager to DHTdimitri staessens2017-09-241-136/+203
| | | | | | | | | | | This adds a threadpool manager to the DHT. This was needed because the detached thread could cause a data race on shutdown. The threadpool manager is revised to allow multiple instances in a single program. The irmd and ipcp now store commands in a buffer (list) instead of a single buffer before passing it to handler threads.
* Merged in dstaesse/ouroboros/be-bugfixes (pull request #614)dimitri staessens2017-09-231-30/+85
|\ | | | | | | Some bugfixes
| * ipcpd: Don't publish DHT entries under lockdimitri staessens2017-09-231-30/+85
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* | Merged in dstaesse/ouroboros/be-bugfixes (pull request #613)dimitri staessens2017-09-231-7/+14
|\| | | | | | | Some bugfixes
| * ipcpd: Lock dht before reading parametersdimitri staessens2017-09-231-7/+14
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* | ipcpd: Fix DHT recursive lookupdimitri staessens2017-09-221-1/+4
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* ipcpd: Mark len parameter as unused in simple_pffdimitri staessens2017-09-211-0/+4
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* Merged in sandervrijders/ouroboros/be-lfa-pff (pull request #607)Sander Vrijders2017-09-217-13/+482
|\ | | | | | | ipcpd: normal: Add alternate hop PFF
| * ipcpd: normal: Add alternate hop PFFSander Vrijders2017-09-217-13/+482
| | | | | | | | | | This adds a PFF that returns an alternate hop as next hop in case the hop that would have been returned is down.
* | ipcpd: Use the kernel scheduler for QoSdimitri staessens2017-09-211-58/+85
|/ | | | | | | | | This revises the sdu_scheduler of the normal IPCP to create a scheduler thread per QoS cube and let the kernel scheduler schedule them based on a priority. Priorities can be set at build time in a range of 0-100, which will be mapped onto a suitable priority for the kernel scheduler. The current scheduler policy is fixed to SCHED_RR since it is the most suitable scheduler defined by POSIX.
* lib: Pass the fuse struct to the handling threaddimitri staessens2017-09-211-1/+1
| | | | This avoids potential data races on rib.fuse.
* Merged in dstaesse/ouroboros/be-dht-revision (pull request #605)dimitri staessens2017-09-211-15/+58
|\ | | | | | | ipcpd: Handle DHT SDUs in different thread
| * ipcpd: Handle DHT SDUs in different threaddimitri staessens2017-09-201-15/+58
| | | | | | | | | | | | | | The DHT will now spawn a thread when receiving SDUs to avoid starvation of sdu scheduler threads. Also fixes some locking issues.
* | ipcpd: normal: Make PFF policy-basedSander Vrijders2017-09-2014-135/+398
|/ | | | | This turns the PDU Forwarding Function of the IPCP into a policy. For now only the simple PFF policy is available.
* Merged in dstaesse/ouroboros/be-dht-query-refuse (pull request #601)dimitri staessens2017-09-191-0/+3
|\ | | | | | | ipcpd: Refuse query when DHT not in running state
| * ipcpd: Refuse query when DHT not in running statedimitri staessens2017-09-191-0/+3
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* | ipcpd: Fix contact list in DHTdimitri staessens2017-09-191-3/+3
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* ipcpd: Enroll DHT when creating dt connectiondimitri staessens2017-09-197-90/+139
| | | | | | | | | The DHT will now enroll or sync when a data transfer connection is added. This avoids the need to create a temporary data transfer connection during enrollment (and speeds it up considerably). The notifier system was modified to take an opaque pointer to the object that registers as a parameter.
* ipcpd, lib: Add flow down eventsSander Vrijders2017-09-192-8/+18
| | | | | | | | This adds the flow down event to Ouroboros. In the shim-eth-llc, a netlink socket is opened which listens to device up/down events. For each event the flow is then adjusted with fccntl to notify the user the flow is down or back up again. In the normal IPCP an event is thrown if a write reports that the flow is down.
* ipcpd: Fix src and dst in link-state advertisementsdimitri staessens2017-09-181-2/+2
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* lib: Provide RIB API to export internals via fusedimitri staessens2017-09-182-13/+132
| | | | | | | This adds a virtual RIB that is accessible as a filesystem that is accessed through a fuse mountpoint (configurable , default is /tmp/ouroboros). Currently, each IPCP will export its link state database.
* ipcpd: Revise internals of normal IPCPdimitri staessens2017-09-1224-1167/+569
| | | | | | | | This removes the RIB as a datastructure and CDAP as the protocol between IPCPs. CDAP, the rib and related sources are deprecated. The link-state protocol policy is udpated to use its own protocol based on a simple broadcast strategy along a tree. The neighbors struct is deprecated and moved to the library as a generic notifier component.
* Merged in dstaesse/ouroboros/be-dht-deadlock (pull request #588)dimitri staessens2017-09-081-6/+4
|\ | | | | | | ipcpd: Shutdown DHT work thread first at destroy
| * ipcpd: Shutdown DHT work thread first at destroydimitri staessens2017-09-071-6/+4
| | | | | | | | This prevents a potential deadlock on the wrlock.
* | ipcpd: Fix double finalization after some failuresdimitri staessens2017-09-071-5/+4
|/ | | | | When enroll or bootstrap failed, finalize_components could be called twice, resulting in double frees or use-after-free.
* ipcpd: normal: Avoid redefining a typedefSander Vrijders2017-09-061-2/+1
| | | | | This avoids a redefinition of a typedef which is a C11 feature, and thus not supported by clang when the c89 switch is enabled.
* ipcpd: normal: Simplify enroll APISander Vrijders2017-09-015-12/+10
| | | | | | | This will remove the dst parameter from enroll_boot, since it was only being used in logging. It also turns some other debug logs into info logs, and makes the component names as they are used in logs all lowercase.
* ipcpd: Fix thread leaks in normal IPCPdimitri staessens2017-08-292-2/+2
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* ipcpd: Fix missing unlock in dhtdimitri staessens2017-08-291-1/+2
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* Merged in dstaesse/ouroboros/be-dht (pull request #577)dimitri staessens2017-08-291-16/+23
|\ | | | | | | ipcpd: Fix state in dht lookup at lookup_wait
| * ipcpd: Fix state in dht lookup at lookup_waitdimitri staessens2017-08-291-16/+23
| | | | | | | | | | | | | | | | | | | | | | The correct state was returned but not set internally in the lookup_struct, causing lookup_wait to return a lookup in LU_PENDING if the wait timedout. This also unlocks the IRMd during register calls and fixes some cleanup if lookup_wait gets interrupted. Fixes #48
* | Merged in sandervrijders/ouroboros/be-fix-authors (pull request #575)Sander Vrijders2017-08-293-6/+6
|\ \ | |/ |/| | | lib, ipcpd: Fix e-mail addresses in protobuf files
| * lib, ipcpd: Fix e-mail addresses in protobuf filesSander Vrijders2017-08-293-6/+6
| | | | | | | | This fixes the wrong e-mail addresses in the protobuf files.
* | dev: Revise fqueue API and add man pagesdimitri staessens2017-08-291-9/+9
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