It's regularly needed to call getsockopt() on a connection, but each
time the calling code has to do all the job by itself. This commit adds
a "get_opt()" callback on the protocol struct, that directly calls
getsockopt() on the connection's FD. A generic implementation for
standard sockets is provided, though QUIC would likely require a
different approach, or maybe a mapping. Due to the overlap between
IP/TCP/socket option values, it is necessary for the caller to indicate
both the level and the option. An abstraction of the level could be
done, but the caller would nonetheless have to know the optname, which
is generally defined in the same include files. So for now we'll
consider that this callback is only for very specific use.
The levels and optnames are purposely passed as signed ints so that it
is possible to further extend the API by using negative levels for
internal namespaces.
This option enables TCP_SAVE_SYN on the listening socket, which will
cause the kernel to try to save a copy of the SYN packet header (L2,
IP and TCP are supported). This can permit to check the source MAC
address of a client, or find certain TCP options such as a source
address encapsulated using RFC7974. It could also be used as an
alternate approach to retrieving the source and destination addresses
and ports. For now setting the option is enabled, but sample fetch
functions and converters will be needed to extract info.
This makes a significant difference when loading large files and during
commit and clear operations, thanks to improved cache locality. In the
measurements below, master refers to the code before any of the changes
to the patterns code, not the code before this one commit.
Timing the replacement of 10M entries from the CLI with this command
which also reports timestamps at start, end of upload and end of clear:
$ (echo "prompt i"; echo "show activity"; echo "prepare acl #0";
awk '{print "add acl @1 #0",$0}' < bad-ip.map; echo "show activity";
echo "commit acl @1 #0"; echo "clear acl @0 #0";echo "show activity") |
socat -t 10 - /tmp/sock1 | grep ^uptim
master, on a 3.7 GHz EPYC, 3 samples:
uptime_now: 6.087030
uptime_now: 25.981777 => 21.9 sec insertion time
uptime_now: 29.286368 => 3.3 sec commit+clear
uptime_now: 5.748087
uptime_now: 25.740675 => 20.0s insertion time
uptime_now: 29.039023 => 3.3 s commit+clear
uptime_now: 7.065362
uptime_now: 26.769596 => 19.7s insertion time
uptime_now: 30.065044 => 3.3s commit+clear
And after this commit:
uptime_now: 6.119215
uptime_now: 25.023019 => 18.9 sec insertion time
uptime_now: 27.155503 => 2.1 sec commit+clear
uptime_now: 5.675931
uptime_now: 24.551035 => 18.9s insertion
uptime_now: 26.652352 => 2.1s commit+clear
uptime_now: 6.722256
uptime_now: 25.593952 => 18.9s insertion
uptime_now: 27.724153 => 2.1s commit+clear
Now timing the startup time with a 10M entries file (on another machine)
on master, 20 samples:
Standard Deviation, s: 0.061652677408033
Mean: 4.217
And after this commit:
Standard Deviation, s: 0.081821371548669
Mean: 3.78
Situations where we are iterating over elements and find one with a
different generation ID cannot arise anymore since the elements are kept
per-generation.
Instead of a global list (and tree) of pattern reference elements, we
now have an intermediate pat_ref_gen structure and store the elements in
those. This simplifies the logic of some operations such as commit and
clear, and improves performance in some cases - numbers to be provided
in a subsequent commit after one important optimization is added.
A lot of the changes are due to adding an extra level of indirection,
changing many cases where we iterate over all elements to an outer loop
iterating over the generation and an inner one iterating over the
elements of the current generation. It is therefore easier to read this
patch using 'git diff -w'.
Safe and non-functional changes that only add currently unused
structures, field, functions and macros, in preparation of larger
changes that alter the way pattern reference elements are stored.
This includes code to create and lookup generation objects, and
macros to iterate over the generations of a pattern reference.
Each proxy has its owned task for internal purpose. Currently, it is
only used either by frontends or if a stick-table is present.
This commit rendres the task allocation optional to only the required
case. Thus, it is not allocated anymore for backend only proxies without
stick-table.
A legacy check could be activated at compile time to reject backends
without servers. In practice this is not used anymore and does not have
much sense with the introduction of dynamic servers.
Each frontend/backend/listen proxies is assigned an unique ID. It can
either be set explicitely via 'id' keyword, or automatically assigned on
post parsing depending on the available values.
It was expected that the first automatically assigned value would start
at '1'. However, due to a legacy bug this is not the case as this value
is always skipped. Thus, automatically assigned proxies always start at
'2' or more.
To avoid breaking the current existing state, this situation is now
acknowledged with the current patch. The code is rewritten with an
explicit warning to ensure that this won't be fixed without knowing the
current status. A new regtest also ensures this.
We now count glitches for each parsing error, including those that
have been accepted via accept-unsafe-violations-*. Front and back
are considered and the connection gets killed on error once if the
threshold is reached or passed and the CPU usage is beyond the
configured limit (0 by default). This was tested with:
curl -ivH "host : blah" 0:4445{,,,,,,,,,}
which sends 10 requests to a configuration having a threshold of 5.
The global keywords are named similarly to H2 and quic:
tune.h1.be.glitches-threshold xxxx
tune.h1.fe.glitches-threshold xxxx
The glitches count of each connection is also reported when non-null
in the connection dumps (e.g. "show fd").
This avoids hitting the hard wall for connections with non-compliant
peers that would be accumulating errors over long connections. We now
permit to recycle the connection early enough to reset the connection
counter.
This was tested artificially by adding this to h2c_frt_handle_headers():
h2c_report_glitch(h2c, 1, "new stream");
or this to h2_detach():
h2c_report_glitch(h2c, 1, "detaching");
and injecting using h2load -c 1 -n 1000 0:4445 on a config featuring
tune.h2.fe.glitches-threshold 1000:
finished in 8.74ms, 85802.54 req/s, 686.62MB/s
requests: 1000 total, 751 started, 751 done, 750 succeeded, 250 failed, 250 errored, 0 timeout
status codes: 750 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 6.00MB (6293303) total, 132.57KB (135750) headers (space savings 29.84%), 5.86MB (6144000) data
min max mean sd +/- sd
time for request: 9us 178us 10us 6us 99.47%
time for connect: 139us 139us 139us 0us 100.00%
time to 1st byte: 339us 339us 339us 0us 100.00%
req/s : 87477.70 87477.70 87477.70 0.00 100.00%
The failures are due to h2load not supporting reconnection.
One rare error case could produce a protocol error on the stream when
not being able to decode response headers wasn't being accounted as a
glitch, so let's fix it.
This guarantees that the compiler will not optimize away the memset()
call if it detects a dead store.
Use this to clear SSL passphrases.
No backport needed.
src/cpu_topo.c:1325:15: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
1325 | } else if (!cpu_policy_conf.flags & CPU_POLICY_ONE_THREAD_PER_CORE)
| ^ ~
src/cpu_topo.c:1325:15: note: add parentheses after the '!' to evaluate the bitwise operator first
1325 | } else if (!cpu_policy_conf.flags & CPU_POLICY_ONE_THREAD_PER_CORE)
| ^
| ( )
src/cpu_topo.c:1325:15: note: add parentheses around left hand side expression to silence this warning
1325 | } else if (!cpu_policy_conf.flags & CPU_POLICY_ONE_THREAD_PER_CORE)
| ^
| ( )
src/cpu_topo.c:1533:15: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
1533 | } else if (!cpu_policy_conf.flags & CPU_POLICY_ONE_THREAD_PER_CORE)
| ^ ~
src/cpu_topo.c:1533:15: note: add parentheses after the '!' to evaluate the bitwise operator first
1533 | } else if (!cpu_policy_conf.flags & CPU_POLICY_ONE_THREAD_PER_CORE)
| ^
| ( )
src/cpu_topo.c:1533:15: note: add parentheses around left hand side expression to silence this warning
1533 | } else if (!cpu_policy_conf.flags & CPU_POLICY_ONE_THREAD_PER_CORE)
| ^
| ( )
No backport needed.
Add a new cpu-affinity keyword, "per-thread".
If used, each thread will be bound to only one hardware thread of the
thread group.
If used in conjonction with the "threads-per-core 1" cpu_policy, then
each thread will be bound on a different core.
Add a new global keyword, max-threads-per-group. It sets the maximum number of
threads a thread group can contain. Unless the number of thread groups
is fixed with "thread-groups", haproxy will just create more thread
groups as needed.
The default and maximum value is 64.
Add a new global option, "cpu-affinity", which controls how threads are
bound.
It currently accepts three values, "per-core", which will bind one thread to
each hardware thread of a given core, and "per-group" which will use all
the available hardware threads of the thread group, and "auto", the
default, which will use "per-group", unless "threads-per-core 1" has
been specified in cpu_policy, in which case it will use per-core.
Add a new, optional key-word to "cpu-policy", "threads-per-core".
It takes one argument, "1" or "auto". If "1" is used, then only one
thread per core will be created, no matter how many hardware thread each
core has. If "auto" is used, then one thread will be created per
hardware thread, as is the case by default.
for example: cpu-policy performance threads-per-core 1
Turn the cpu policy configuration into a struct. Right now it just
contains an int, that represents the policy used, but will get more
information soon.
Since commit 1ed2c9d ("REGTESTS: list all skipped tests including
'feature cmd' ones"), the script emits some error when trying to display
the list of skipped tests when there are none.
No backport needed.
In H2 the conditions to create a new stream differ for a client and a
server when a GOAWAY was exchanged. While on the server, any stream
whose ID is lower than or equal to the one advertised in GOAWAY is
valid, for a client it's forbidden to create any stream after receipt
of a GOAWAY, even if its ID is lower than or equal to the last one,
despite the server not being able to tell the difference from the
number of streams in flight.
Unfortunately, the logic in the code did not always reflect this
specificity of the client (the backend code in our case), and most
often considered that it was still permitted to create a new stream
until the max_id was greater than or equal to the advertised last_id.
This is for example what h2c_is_dead() and h2c_streams_left() do. In
other places, such as h2_avail_streams(), the rule is properly taken
into account. Very often the advertised last_id is the same, and this
is also what haproxy does (which explains why it's impossible to
reproduce the issue by chaining two haproxy layers), but a server may
wish to advertise any ID including 2^31-1 as mentioned in the spec,
and in this case the functions would behave differently.
This discrepancy results in a corner case where a GOAWAY received on
an idle connection will cause the next stream creation to be initially
accepted but then rejected via h2_avail_streams(), and the connection
left in a bad state, still attached to the session due to http-reuse
safe, but not reinserted into idle list, since the backend code
currently is not able to properly recover from this situation. Worse,
the idle flags are no longer on it but TASK_F_USR1 still is, and this
makes the recently added BUG_ON() rightfully trigger since this case
is not supposed to happen.
Admittedly more of the backend recovery code needs to be reworked,
however the mux must consistently decide whether or not a connection
may be reused or needs to be released.
This commit fixes the affected logic by introducing a new function
"h2c_reached_last_stream()" which says if a connection has reached its
last stream, regardless of the side, and using this one everywhere
max_id was compared to last_id. This is sufficient to address the
corner case that be_reuse_connection() currently cannot recover from.
This is in relation to GH issue #3215 and it should be sufficient to
fix the issue there. Thanks to Chris Staite for reporting the issue
and kudos to Amaury for spotting the events sequence that can lead
to this situation.
This patch must be backported to 3.3 first, then to older versions
later. It's worth noting that it's much more difficult to observe
the issue before 3.3 because the BUG_ON() is not there, and the
possibly non-released connection might end up being killed for other
reasons (timeouts etc). But one possible visible effect might be the
impossibility to delete a server (which Chris observed in 3.3).
Back in the mists of time, commit e91a526c8f decided that if we were trying
to stay on the same server than the previous request, and if there were
a connection available in the session, we'd remove its CO_FL_SESS_IDLE.
The reason for doing that has been long lost, probably it fixed a bug at some
point, but it was most probably not the right place to do that. And starting
with 3.3, this triggers a BUG_ON() because that flag is expected later on.
So just revert the commit, if the ancient bug shows up again, it will be
fixed another way.
This should be backported to 3.3. There is little reason to backport it
to previous versions, unless other patches depend on it.
vtest.yml only builds the releases of OpenSSL for now, there's no way to
check if we still have issues with the API before a pre-release version
is released.
This job builds the master branch of OpenSSL.
It is run everyday at 3 AM.
Remove the openssl no-deprecated job which was used for 1.1.0 API.
It's not useful anymore since it uses the OpenSSL version of the
distributions.
Checking depreciations in the API is still useful when using newest
version of the library. A job for the OpenSSL master branch would be
more useful than that.
The script for running regression tests is modified to improve the
visibility of skipped tests.
Previously, the reasons for skipping tests were only visible during the
test discovery phase when grepping the vtc (REQUIRE, EXCLUDE, etc).
But reg-tests skipped by vtest with the 'feature cmd' keywords were not
listed.
This change introduces the following:
- vtest does not remove the logs itself anymore, because it is not
able to let the log available when a test is skipped. So the -L
parameter is now always passed to vtest
- All skipped tests during the discovery phase are now logged to a
'skipped.log' file within the test directory
- The script now parses vtest logs to find tests that were skipped
due to missing features (via the 'feature cmd' in .vtc files)
and adds them to the skipped list.
This issue was reported in GH #3214 where quic/tls13_ssl_crt-list_filters.vtc
QUIC reg test was run without haproxy QUIC support due to OPENSSL_AWSLC enabled
featured.
This is due to the fact that when ssl/tls13_ssl_crt-list_filters.vtc has been
ported to QUIC the feature(OPENSSL) was silly replaced by feature(QUIC) leading
the script to be run even without QUIC support if OR'ed OPENSSL_AWSLC feature is
enabled.
A good method to port these feature() commands to QUIC would have been
to add a feature(QUIC) command seperated from the one used for the supported
TLS stacks identified by the original underlying ssl reg tests (in reg-tests/ssl).
This is what is done by this patch.
Thank you to @idl0r for having reported this issue.
In ssl_sock_srv_try_reuse_sess(), the connection is always defined, to TCP
and QUIC connections. No reason to test it. Because it is not so obvious for
the QUIC part, a BUG_ON() could be added here. For now, just remove useless
tests.
This patch should fix a Coverity report from #3213.
The xprt used to perform a healthcheck is always defined and cannot be NULL.
So there is no reason to test it. It could lead to wrong assumptions later
in the code.
This patch should fix a Coverity report from #3213.
The server's xprt is always defined and cannot be NULL. So there is no
reason to test it. It could lead to wrong assumptions later in the code.
This patch should fix a Coverity report from #3213.
Not every CC algos implement hystart, so only call the method if it is
actually there. Failure to do so will cause crashes if hystart is on,
and the algo doesn't implement it.
This should fix github issue #3218
This should be backported up to 3.0.
SC_FL_ABRT_DONE flag should never be set when SC_FL_EOS was already
set. These both flags were introduced to replace the old CF_SHUTR and to
have a flag for shuts driven by the stream and a flag for the read0 received
by the mux. So both flags must not be seen at same time on a SC. It is
espeically important because some processing are performed when these flags
are set. And wrong decisions may be made.
This patch must be backproted as far as 2.8.
The first attempt to fix this issue (c672b2a29 "BUG/MINOR: http-ana:
Properly detect client abort when forwarding the response") was not fully
correct and could be responsible to false report of client abort during the
response forwarding. I guess it is possible to truncate the response.
Instead, we must also take care that the client closed on its side, by
checking SC_FL_EOS flag on the front SC. Indeed, if the client has aborted,
this flag should be set.
This patch should be backported as far as 2.8.
The RX_F_INHERITED flag was ambiguous, as it was used to mark both
listeners inherited from the parent process and listeners duplicated
from another local receiver. This could lead to incorrect behavior
concerning socket unbinding and suspension.
This commit refactors the handling of inherited listeners by splitting
the RX_F_INHERITED flag into two more specific flags:
- RX_F_INHERITED_FD: Indicates a listener inherited from the parent
process via its file descriptor. These listeners should not be unbound
by the master.
- RX_F_INHERITED_SOCK: Indicates a listener that shares a socket with
another one, either by being inherited from the parent or by being
duplicated from another local listener. These listeners should not be
suspended or resumed individually.
Previously, the sharding code was unconditionally using RX_F_INHERITED
when duplicating a file descriptor. In HAProxy versions prior to 3.1,
this led to a file descriptor leak for duplicated unix stats sockets in
the master process. This would eventually cause the master to crash with
a BUG_ON in fd_insert() once the file descriptor limit was reached.
This must be backported as far as 3.0. Branches earlier than 3.0 are
affected but would need a different patch as the logic is different.
Released version 3.4-dev1 with the following main changes :
- BUG/MINOR: jwt: Missing "case" in switch statement
- DOC: configuration: ECH support details
- Revert "MINOR: quic: use dynamic cc_algo on bind_conf"
- MINOR: quic: define quic_cc_algo as const
- MINOR: quic: extract cc-algo parsing in a dedicated function
- MINOR: quic: implement cc-algo server keyword
- BUG/MINOR: quic-be: Missing keywords array NULL termination
- REGTESTS: ssl enable tls12_reuse.vtc for AWS-LC
- REGTESTS: ssl: split tls*_reuse in stateless and stateful resume tests
- BUG/MEDIUM: connection: fix "bc_settings_streams_limit" typo
- BUG/MEDIUM: config: ignore empty args in skipped blocks
- DOC: config: mention clearer that the cache's total-max-size is mandatory
- DOC: config: reorder the cache section's keywords
- BUG/MINOR: quic/ssl: crash in ClientHello callback ssl traces
- BUG/MINOR: quic-be: handshake errors without connection stream closure
- MINOR: quic: Add useful debugging traces in qc_idle_timer_do_rearm()
- REGTESTS: ssl: Move all the SSL certificates, keys, crt-lists inside "certs" directory
- REGTESTS: quic/ssl: ssl/del_ssl_crt-list.vtc supported by QUIC
- REGTESTS: quic: dynamic_server_ssl.vtc supported by QUIC
- REGTESTS: quic: issuers_chain_path.vtc supported by QUIC
- REGTESTS: quic: new_del_ssl_cafile.vtc supported by QUIC
- REGTESTS: quic: ocsp_auto_update.vtc supported by QUIC
- REGTESTS: quic: set_ssl_bug_2265.vtc supported by QUIC
- MINOR: quic: avoid code duplication in TLS alert callback
- BUG/MINOR: quic-be: missing connection stream closure upon TLS alert to send
- REGTESTS: quic: set_ssl_cafile.vtc supported by QUIC
- REGTESTS: quic: set_ssl_cert_noext.vtc supported by QUIC
- REGTESTS: quic: set_ssl_cert.vtc supported by QUIC
- REGTESTS: quic: set_ssl_crlfile.vtc supported by QUIC
- REGTESTS: quic: set_ssl_server_cert.vtc supported by QUIC
- REGTESTS: quic: show_ssl_ocspresponse.vtc supported by QUIC
- REGTESTS: quic: ssl_client_auth.vtc supported by QUIC
- REGTESTS: quic: ssl_client_samples.vtc supported by QUIC
- REGTESTS: quic: ssl_default_server.vtc supported by QUIC
- REGTESTS: quic: new_del_ssl_crlfile.vtc supported by QUIC
- REGTESTS: quic: ssl_frontend_samples.vtc supported by QUIC
- REGTESTS: quic: ssl_server_samples.vtc supported by QUIC
- REGTESTS: quic: ssl_simple_crt-list.vtc supported by QUIC
- REGTESTS: quic: ssl_sni_auto.vtc code provision for QUIC
- REGTESTS: quic: ssl_curve_name.vtc supported by QUIC
- REGTESTS: quic: add_ssl_crt-list.vtc supported by QUIC
- REGTESTS: add ssl_ciphersuites.vtc (TCP & QUIC)
- BUG/MINOR: quic: do not set first the default QUIC curves
- REGTESTS: quic/ssl: Add ssl_curves_selection.vtc
- BUG/MINOR: ssl: Don't allow to set NULL sni
- MEDIUM: quic: Add connection as argument when qc_new_conn() is called
- MINOR: ssl: Add a function to hash SNIs
- MINOR: ssl: Store hash of the SNI for cached TLS sessions
- MINOR: ssl: Compare hashes instead of SNIs when a session is cached
- MINOR: connection/ssl: Store the SNI hash value in the connection itself
- MEDIUM: tcpcheck/backend: Get the connection SNI before initializing SSL ctx
- BUG/MEDIUM: ssl: Don't reuse TLS session if the connection's SNI differs
- MEDIUM: ssl/server: No longer store the SNI of cached TLS sessions
- BUG/MINOR: log: Dump good %B and %U values in logs
- BUG/MEDIUM: http-ana: Don't close server connection on read0 in TUNNEL mode
- DOC: config: Fix description of the spop mode
- DOC: config: Improve spop mode documentation
- MINOR: ssl: Split ssl_crt-list_filters.vtc in two files by TLS version
- REGTESTS: quic: tls13_ssl_crt-list_filters.vtc supported by QUIC
- BUG/MEDIUM: h3: do not access QCS <sd> if not allocated
- CLEANUP: mworker/cli: remove useless variable
- BUG/MINOR: mworker/cli: 'show proc' is limited by buffer size
- BUG/MEDIUM: ssl: Always check the ALPN after handshake
- MINOR: connections: Add a new CO_FL_SSL_NO_CACHED_INFO flag
- BUG/MEDIUM: ssl: Don't store the ALPN for check connections
- BUG/MEDIUM: ssl: Don't resume session for check connections
- CLEANUP: improvements to the alignment macros
- CLEANUP: use the automatic alignment feature
- CLEANUP: more conversions and cleanups for alignment
- BUG/MEDIUM: h3: fix access to QCS <sd> definitely
- MINOR: h2/trace: emit a trace of the received RST_STREAM type
Right now we don't get any state trace when receiving an RST_STREAM, and
this is not convenient because RST_STREAM(0) is not visible at all, except
in developer level because the function is entered and left.
Let's extract the RST code first and always log it using TRACE_PRINTF()
(along with h2c/h2s) so that it's possible to detect certain codes being
used.
The previous patch tried to fix access to QCS <sd> member, as the latter
is not always allocated anymore on the frontend side.
a15f0461a016a664427f5aaad2227adcc622c882
BUG/MEDIUM: h3: do not access QCS <sd> if not allocated
In particular, access was prevented after HEADERS parsing in case
h3_req_headers_to_htx() returned an error, which indicates that the
stream-endpoint allocation was not performed. However, this still is not
enough when QCS instance is already closed at this step. Indeed, in this
case, h3_req_headers_to_htx() returns OK but stream-endpoint allocation
is skipped as an optimization as no data exchange will be performed.
To definitely fix this kind of problems, add checks on qcs <sd> member
before accessing it in H3 layer. This method is the safest one to ensure
there is no NULL dereferencement.
This should fix github issue #3211.
This must be backported along the above mentionned patch.
- Convert additional cases to use the automatic alignment feature for
the THREAD_ALIGN(ED) macros. This includes some cases that are less
obviously correct where it seems we wanted to align only in the
USE_THREAD case but were not using the thread specific macros.
- Also move some alignment requirements to the structure definition
instead of having it on variable declaration.
- Use the automatic alignment feature instead of hardcoding 64 all over
the code.
- This also converts a few bare __attribute__((aligned(X))) to using the
ALIGNED macro.
- It is now possible to use the THREAD_ALIGN and THREAD_ALIGNED macros
without a parameter. In this case, we automatically align on the cache
line size.
- The cache line size is set to 64 by default to match the current code,
but it can be overridden on the command line.
- This required moving the DEFVAL/DEFNULL/DEFZERO macros to compiler.h
instead of tools-t.h, to avoid namespace pollution if we included
tools-t.h from compiler.h.
Don't attempt to use stored sessions when creating new check
connections, as the check SSL parameters might be different from the
server's ones.
This has not been proven to be a problem yet, but it doesn't mean it
can't be, and this should be backported up to 2.8 along with
dcce9369129f6ca9b8eed6b451c0e20c226af2e3 if it is.
When establishing check connections, do not store the negociated ALPN
into the server's path_param if the connection is a check connection, as
it may use different SSL parameters than the regular connections. To do
so, only store them if the CO_FL_SSL_NO_CACHED_INFO is not set.
Otherwise, the check ALPN may be stored, and the wrong mux can be used
for regular connections, which will end up generating 502s.
This should fix Github issue #3207
This should be backported to 3.3.
Add a new flag to connections, CO_FL_SSL_NO_CACHED_INFO, and set it for
checks.
It lets the ssl layer know that he should not use cached informations,
such as the ALPN as stored in the server, or cached sessions.
This wlil be used for checks, as checks may target different servers, or
used a different SSL configuration, so we can't assume the stored
informations are correct.
This should be backported to 3.3, and may be backported up to 2.8 if the
attempts to do session resume by checks is proven to be a problem.
Move the code that is responsible for checking the ALPN, and updating
the one stored in the server's path_param, from after we created the
mux, to after we did an handshake. Once we did it once, the mux will not
be created by the ssl code anymore, as when we know which mux to use
thanks to the ALPN, it will be done earlier in connect_server(), so in
the unlikely event it changes, we would not detect it anymore, and we'd
keep on creating the wrong mux.
This can be reproduced by doing a first request, and then changing the
ALPN of the server without haproxy noticing (ie without haproxy noticing
that the server went down).
This should be backported to 3.3.
In ticket #3204, it was reported that "show proc" is not able to display
more than 202 processes. Indeed the bufsize is 16k by default in the
master, and can't be changed anymore since 3.1.
This patch allows the 'show proc' to start again to dump when the buffer
is full, based on the timestamp of the last PID it attempted to dump.
Using pointers or count the number of processes might not be a good idea
since the list can change between calls.
Could be backported in all stable branche.
