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doc: Add general documentation
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This adds user documentation for the Ouroboros User Manual in man
sections 7 and 8. It consists of a general man page, a tutorial and a
glossary.
It also fixes and updates other manpages in the Ouroboros Programmer's
Manual.
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build: Set bugreport URL
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#626)
Be deprecate ouroboros init fini
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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.
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lib: Re-enable multi-block support
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Multi-block support was forgotten during the update of the build
system. This enables it again and fixes some bugs when it is disabled
and larger SDUs are sent.
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ipcpd: Fix unreachable code in shim-eth-llc
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Closing the file descriptor after a while(true) loop led to clang
compiler errors. This is fixed by adding a cleanup handler.
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ipcpd: Handle cancellation while writing LSAs
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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
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irmd: Add option to print version
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This adds the --version option to the IRMd. With this option it will
print the version of Ouroboros to stdout and exit. Checking the
version does not require root privileges.
Also fixes calling log functions before log_init() and after
log_fini().
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irmd: Don't destroy flows before IPCPs
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This allows the IPCPs to call ouroboros_fini() and clean up their
buffers and drastically reduce chances of getting an assertion error
that some rbuffs are not empty when shutting down the irmd.
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lib: Cancel tpm threads instead of marking exit
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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.
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ipcpd: normal: Add Loop-Free Alternates routing
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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.
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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.
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Be routing
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This adds a refcount to the graph edges so that it is only included in
the calculation if both sides announced it.
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This keeps the index in the vertex struct so that is more easily
available during Dijkstra.
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This simplifies the Dijkstra implementation by immediately setting the
correct next hop during Dijkstra instead of looping through the list
of predecessors afterwards.
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This simplifies several internal graph functions by passing an array
of bools instead of an array of vertices.
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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.
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ipcpd: normal: Set clock to realtime clock
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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.
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ipcpd: Add multiplier to scale scheduler threads
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ipcpd: Fix deadlock in DHT
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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
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ipcpd: Fix compilation of DHT
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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.
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Some bugfixes
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There was a return -1 in the allocate call which is unsafe since -1
may be a valid id in the bitmap. Since it's a data structure for
internal use, I replaced the NULL checks with assertions.
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Some bugfixes
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This fixes a data race in the shim-udp where the alloc_lock was
released before the ipcpi.alloc_id was set.
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lib: Disable lockless rbuff by default
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This disables the lockless rbuff by default since it is less stable
and tested.
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ipcpd: Fix DHT recursive lookup
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lib: Include string.h in hashtable.c for memcpy
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ipcpd: Cancel threads in IPCPs
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This reduces CPU consumption and shutdown times.
Invalidates #43
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