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Fixes various aspects of --test-build-devpoll, --test-build-eventport, and
--test-build-epoll.
In particular, if --test-build-devpoll was used on Linux, then "devpoll"
event method would be preferred over "epoll". Also, wrong definitions of
event macros were chosen.
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Avoid POLLREMOVE and itimerspec redefinition.
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The "aio_write" directive is introduced, which enables use of aio
for writing. Currently it is meaningful only with "aio threads".
Note that aio operations can be done by both event pipe and output
chain, so proper mapping between r->aio and p->aio is provided when
calling ngx_event_pipe() and in output filter.
In collaboration with Valentin Bartenev.
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If a write event happens after sendfile() but before we've got the
sendfile results in the main thread, this write event will be ignored.
And if no more events will happen, the connection will hang.
Removing the events works in the simple cases, but not always, as
in some cases events are added back by an unrelated code. E.g.,
the upstream module adds write event in the ngx_http_upstream_init()
to track client aborts.
Fix is to use wev->complete instead. It is now set to 0 before
a sendfile() task is posted, and it is set to 1 once a write event
happens. If on completion of the sendfile() task wev->complete is 1,
we know that an event happened while we were executing sendfile(), and
the socket is still ready for writing even if sendfile() did not sent
all the data or returned EAGAIN.
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This fixes "called a function you should not call" and
"shutdown while in init" errors as observed with OpenSSL 1.0.2f
due to changes in how OpenSSL handles SSL_shutdown() during
SSL handshakes.
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As setitimer() isn't available on Windows, time wasn't updated at all
if timer_resolution was used with the select event method. Fix is
to ignore timer_resolution in such cases.
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This context is needed for shared sessions cache to work in configurations
with multiple virtual servers sharing the same port. Unfortunately, OpenSSL
does not provide an API to access the session context, thus storing it
separately.
In collaboration with Vladimir Homutov.
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If no space left in buffer after adding formatting symbols, error message
could be left without terminating null. The fix is to output message using
actual length.
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RAND_pseudo_bytes() is deprecated in the OpenSSL master branch, so the only
use was changed to RAND_bytes(). Access to internal structures is no longer
possible, so now we don't try to set SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS even
if it's defined.
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OCSP responses may contain no nextUpdate. As per RFC 6960, this means
that nextUpdate checks should be bypassed. Handle this gracefully by
using NGX_MAX_TIME_T_VALUE as "valid" in such a case.
The problem was introduced by 6893a1007a7c (1.9.2).
Reported by Matthew Baldwin.
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Broken by 6893a1007a7c (1.9.2) during introduction of strict OCSP response
validity checks. As stapling file is expected to be returned unconditionally,
fix is to set its validity to the maximum supported time.
Reported by Faidon Liambotis.
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The change was missed in f69d1aab6a0f.
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When configured, an individual listen socket on a given address is
created for each worker process. This allows to reduce in-kernel lock
contention on configurations with high accept rates, resulting in better
performance. As of now it works on Linux and DragonFly BSD.
Note that on Linux incoming connection requests are currently tied up
to a specific listen socket, and if some sockets are closed, connection
requests will be reset, see https://lwn.net/Articles/542629/. With
nginx, this may happen if the number of worker processes is reduced.
There is no such problem on DragonFly BSD.
Based on previous work by Sepherosa Ziehau and Yingqi Lu.
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This may happen if eventfd() returns ENOSYS, notably seen on CentOS 5.4.
Such a failure will now just disable the notification mechanism and let
the callers cope with it, instead of failing to start worker processes.
If thread pools are not configured, this can safely be ignored.
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These modules can't be compiled on win32.
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Missing call to X509_STORE_CTX_free when X509_STORE_CTX_init fails.
Missing call to OCSP_CERTID_free when OCSP_request_add0_id fails.
Possible leaks in vary particular scenariis of memory shortage.
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The main thread could wake up and start processing the notify event
before the handler was set.
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The SSL_MODE_NO_AUTO_CHAIN mode prevents OpenSSL from automatically
building a certificate chain on the fly if there is no certificate chain
explicitly provided. Before this change, certificates provided via the
ssl_client_certificate and ssl_trusted_certificate directives were
used by OpenSSL to automatically build certificate chains, resulting
in unexpected (and in some cases unneeded) chains being sent to clients.
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LibreSSL 2.1.1+ started to set SSL_OP_NO_SSLv3 option by default on
new contexts. This makes sure to clear it to make it possible to use SSLv3
with LibreSSL if enabled in nginx config.
Prodded by Kuramoto Eiji.
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It's mostly dead code and the original idea of worker threads has been rejected.
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No functional changes.
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This reduces layering violation and simplifies the logic of AIO preread, since
it's now triggered by the send chain function itself without falling back to
the copy filter. The context of AIO operation is now stored per file buffer,
which makes it possible to properly handle cases when multiple buffers come
from different locations, each with its own configuration.
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The flag was recently removed by BoringSSL.
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