Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_gcc_atomic_sparc64.h @ 7983:39501ce97e29
gRPC: generate error when response size is wrong.
As long as the "Content-Length" header is given, we now make sure
it exactly matches the size of the response. If it doesn't,
the response is considered malformed and must not be forwarded
(https://tools.ietf.org/html/rfc7540#section-8.1.2.6). While it
is not really possible to "not forward" the response which is already
being forwarded, we generate an error instead, which is the closest
equivalent.
Previous behaviour was to pass everything to the client, but this
seems to be suboptimal and causes issues (ticket #1695). Also this
directly contradicts HTTP/2 specification requirements.
Note that the new behaviour for the gRPC proxy is more strict than that
applied in other variants of proxying. This is intentional, as HTTP/2
specification requires us to do so, while in other types of proxying
malformed responses from backends are well known and historically
tolerated.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 06 Jul 2020 18:36:25 +0300 |
parents | 67653855682e |
children |
rev | line source |
---|---|
561 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
561 | 5 */ |
6 | |
7 | |
8 /* | |
9 * "casa [r1] 0x80, r2, r0" and | |
10 * "casxa [r1] 0x80, r2, r0" do the following: | |
11 * | |
12 * if ([r1] == r2) { | |
13 * swap(r0, [r1]); | |
14 * } else { | |
15 * r0 = [r1]; | |
16 * } | |
17 * | |
4572
67653855682e
Fixed spelling in multiline C comments.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
18 * so "r0 == r2" means that the operation was successful. |
561 | 19 * |
20 * | |
21 * The "r" means the general register. | |
22 * The "+r" means the general register used for both input and output. | |
23 */ | |
24 | |
25 | |
26 #if (NGX_PTR_SIZE == 4) | |
27 #define NGX_CASA "casa" | |
28 #else | |
29 #define NGX_CASA "casxa" | |
30 #endif | |
31 | |
32 | |
33 static ngx_inline ngx_atomic_uint_t | |
34 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
35 ngx_atomic_uint_t set) | |
36 { | |
37 __asm__ volatile ( | |
38 | |
39 NGX_CASA " [%1] 0x80, %2, %0" | |
40 | |
41 : "+r" (set) : "r" (lock), "r" (old) : "memory"); | |
42 | |
43 return (set == old); | |
577 | 44 } |
561 | 45 |
46 | |
47 static ngx_inline ngx_atomic_int_t | |
48 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
49 { | |
50 ngx_atomic_uint_t old, res; | |
51 | |
52 old = *value; | |
53 | |
54 for ( ;; ) { | |
55 | |
56 res = old + add; | |
57 | |
58 __asm__ volatile ( | |
59 | |
60 NGX_CASA " [%1] 0x80, %2, %0" | |
61 | |
62 : "+r" (res) : "r" (value), "r" (old) : "memory"); | |
63 | |
64 if (res == old) { | |
65 return res; | |
66 } | |
67 | |
68 old = res; | |
69 } | |
70 } | |
563 | 71 |
72 | |
73 #if (NGX_SMP) | |
74 #define ngx_memory_barrier() \ | |
75 __asm__ volatile ( \ | |
76 "membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad" \ | |
77 ::: "memory") | |
78 #else | |
79 #define ngx_memory_barrier() __asm__ volatile ("" ::: "memory") | |
80 #endif | |
611 | 81 |
82 #define ngx_cpu_pause() |