| Commit message (Collapse) | Author | Age |
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Previously, the default pool alignment used sizeof(unsigned long), with
the expectation that this would match to a platform word size. Certain
64-bit platforms prove this assumption wrong by keeping the 32-bit long
type, which is fully compliant with the C standard.
This introduces a possibility of suboptimal misaligned access to the
data allocated with ngx_palloc() on the affected platforms, which is
addressed here by changing the default NGX_ALIGNMENT to a pointer size.
As we override the detection in auto/os/conf for all the machine types
except x86, and Unix-like 64-bit systems prefer the 64-bit long, the
impact of the change should be limited to Win64 x64.
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When client address is received, IPv6 address could be specified without
square brackets and without port, as well as both with the brackets and
port. The change allows IPv6 in square brackets and no port, which was
previously considered an error. This format conforms to RFC 3986.
The change also affects proxy_bind and friends.
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When re-creating a non-reusable zone, make the pointer to the old zone
available during the new zone initialization.
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Previously chain links could sometimes be dropped instead of being reused,
which could result in increased memory consumption during long requests.
A similar chain link issue in ngx_http_gzip_filter_module was fixed in
da46bfc484ef (1.11.10).
Based on a patch by Sangmin Lee.
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Previously, it could result when left-shifting signed integer due to implicit
integer promotion, such that the most significant bit appeared on the sign bit.
In practice, though, this results in the same left value as with an explicit
cast, at least on known compilers, such as GCC and Clang. The reason is that
in_addr_t, which is equivalent to uint32_t and same as "unsigned int" in ILP32
and LP64 data type models, has the same type width as the intermediate after
integer promotion, so there's no side effects such as sign-extension. This
explains why adding an explicit cast does not change object files in practice.
Found with UndefinedBehaviorSanitizer (shift).
Based on a patch by Piotr Sikora.
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This improves nginx startup times significantly when using very large number
of locations due to computational complexity of the sorting algorithm being
used: insertion sort is O(n*n) on average, while merge sort is O(n*log(n)).
In particular, in a test configuration with 20k locations total startup
time is reduced from 8 seconds to 0.9 seconds.
Prodded by Yusuke Nojima,
https://mailman.nginx.org/pipermail/nginx-devel/2023-September/NUL3Y2FPPFSHMPTFTL65KXSXNTX3NQMK.html
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In ngx_regex_cleanup() allocator wasn't configured when calling
pcre2_compile_context_free() and pcre2_match_data_free(), resulting
in no ngx_free() call and leaked memory. Fix is ensure that allocator
is configured for global allocations, so that ngx_free() is actually
called to free memory.
Additionally, ngx_regex_compile_context was cleared in
ngx_regex_module_init(). It should be either not cleared, so it will
be freed by ngx_regex_cleanup(), or properly freed. Fix is to
not clear it, so ngx_regex_cleanup() will be able to free it.
Reported by ZhenZhong Wu,
https://mailman.nginx.org/pipermail/nginx-devel/2023-September/3Z5FIKUDRN2WBSL3JWTZJ7SXDA6YIWPB.html
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Enabling QUIC changes ngx_connection_t layout, which is why it should be
added to the signature.
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MTU selection starts by doubling the initial MTU until the first failure.
Then binary search is used to find the path MTU.
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Similarly to 6822:c045b4926b2c, environment variables introduced with
the "env" directive (and "NGINX_BPF_MAPS" added by QUIC) are now allocated
via ngx_alloc(), and explicitly freed by a cleanup handler if no longer used.
In collaboration with Sergey Kandaurov.
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Previously, ngx_udp_rbtree_insert_value() was used for plain UDP and
ngx_quic_rbtree_insert_value() was used for QUIC. Because of this it was
impossible to initialize connection tree in ngx_create_listening() since
this function is not aware what kind of listening it creates.
Now ngx_udp_rbtree_insert_value() is used for both QUIC and UDP. To make
is possible, a generic key field is added to ngx_udp_connection_t. It keeps
client address for UDP and connection ID for QUIC.
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As per RFC 9000, Section 14:
UDP datagrams MUST NOT be fragmented at the IP layer.
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Previously, QUIC used the existing UDP framework, which was created for UDP in
Stream. However the way QUIC connections are created and looked up is different
from the way UDP connections in Stream are created and looked up. Now these
two implementations are decoupled.
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Previously it had -1 as fd. This fixes proxying, which relies on downstream
connection having a real fd. Also, this reduces diff to the default branch for
ngx_close_connection().
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The quic kernel bpf helper inspects packet payload for DCID, extracts key
and routes the packet into socket matching the key.
Due to reuseport feature, each worker owns a personal socket, which is
identified by the same key, used to create DCID.
BPF objects are locked in RAM and are subject to RLIMIT_MEMLOCK.
The "ulimit -l" command may be used to setup proper limits, if maps
cannot be created with EPERM or updated with ETOOLONG.
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