1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/transport/chttp2/incoming_metadata.h"
#include <string.h>
#include "src/core/transport/chttp2/internal.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
void grpc_chttp2_incoming_metadata_buffer_init(
grpc_chttp2_incoming_metadata_buffer *buffer) {
buffer->deadline = gpr_inf_future(GPR_CLOCK_REALTIME);
}
void grpc_chttp2_incoming_metadata_buffer_destroy(
grpc_chttp2_incoming_metadata_buffer *buffer) {
size_t i;
for (i = 0; i < buffer->count; i++) {
GRPC_MDELEM_UNREF(buffer->elems[i].md);
}
gpr_free(buffer->elems);
}
void grpc_chttp2_incoming_metadata_buffer_add(
grpc_chttp2_incoming_metadata_buffer *buffer, grpc_mdelem *elem) {
if (buffer->capacity == buffer->count) {
buffer->capacity = GPR_MAX(8, 2 * buffer->capacity);
buffer->elems =
gpr_realloc(buffer->elems, sizeof(*buffer->elems) * buffer->capacity);
}
buffer->elems[buffer->count++].md = elem;
}
void grpc_chttp2_incoming_metadata_buffer_set_deadline(
grpc_chttp2_incoming_metadata_buffer *buffer, gpr_timespec deadline) {
buffer->deadline = deadline;
}
void grpc_chttp2_incoming_metadata_live_op_buffer_end(
grpc_chttp2_incoming_metadata_live_op_buffer *buffer) {
gpr_free(buffer->elems);
buffer->elems = NULL;
}
void grpc_chttp2_incoming_metadata_buffer_place_metadata_batch_into(
grpc_chttp2_incoming_metadata_buffer *buffer, grpc_stream_op_buffer *sopb) {
grpc_metadata_batch b;
b.list.head = NULL;
/* Store away the last element of the list, so that in patch_metadata_ops
we can reconstitute the list.
We can't do list building here as later incoming metadata may reallocate
the underlying array. */
b.list.tail = (void *)(gpr_intptr)buffer->count;
b.garbage.head = b.garbage.tail = NULL;
b.deadline = buffer->deadline;
buffer->deadline = gpr_inf_future(GPR_CLOCK_REALTIME);
grpc_sopb_add_metadata(sopb, b);
}
void grpc_chttp2_incoming_metadata_buffer_swap(
grpc_chttp2_incoming_metadata_buffer *a,
grpc_chttp2_incoming_metadata_buffer *b) {
GPR_SWAP(grpc_chttp2_incoming_metadata_buffer, *a, *b);
}
void grpc_incoming_metadata_buffer_move_to_referencing_sopb(
grpc_chttp2_incoming_metadata_buffer *src,
grpc_chttp2_incoming_metadata_buffer *dst, grpc_stream_op_buffer *sopb) {
size_t delta;
size_t i;
dst->deadline = gpr_time_min(src->deadline, dst->deadline);
if (src->count == 0) {
return;
}
if (dst->count == 0) {
grpc_chttp2_incoming_metadata_buffer_swap(src, dst);
return;
}
delta = dst->count;
if (dst->capacity < src->count + dst->count) {
dst->capacity = GPR_MAX(dst->capacity * 2, src->count + dst->count);
dst->elems = gpr_realloc(dst->elems, dst->capacity * sizeof(*dst->elems));
}
memcpy(dst->elems + dst->count, src->elems, src->count * sizeof(*src->elems));
dst->count += src->count;
for (i = 0; i < sopb->nops; i++) {
if (sopb->ops[i].type != GRPC_OP_METADATA) continue;
sopb->ops[i].data.metadata.list.tail =
(void *)(delta + (gpr_intptr)sopb->ops[i].data.metadata.list.tail);
}
src->count = 0;
}
void grpc_chttp2_incoming_metadata_buffer_postprocess_sopb_and_begin_live_op(
grpc_chttp2_incoming_metadata_buffer *buffer, grpc_stream_op_buffer *sopb,
grpc_chttp2_incoming_metadata_live_op_buffer *live_op_buffer) {
grpc_stream_op *ops = sopb->ops;
size_t nops = sopb->nops;
size_t i;
size_t j;
size_t mdidx = 0;
size_t last_mdidx;
int found_metadata = 0;
/* rework the array of metadata into a linked list, making use
of the breadcrumbs we left in metadata batches during
add_metadata_batch */
for (i = 0; i < nops; i++) {
grpc_stream_op *op = &ops[i];
if (op->type != GRPC_OP_METADATA) continue;
found_metadata = 1;
/* we left a breadcrumb indicating where the end of this list is,
and since we add sequentially, we know from the end of the last
segment where this segment begins */
last_mdidx = (size_t)(gpr_intptr)(op->data.metadata.list.tail);
GPR_ASSERT(last_mdidx > mdidx);
GPR_ASSERT(last_mdidx <= buffer->count);
/* turn the array into a doubly linked list */
op->data.metadata.list.head = &buffer->elems[mdidx];
op->data.metadata.list.tail = &buffer->elems[last_mdidx - 1];
for (j = mdidx + 1; j < last_mdidx; j++) {
buffer->elems[j].prev = &buffer->elems[j - 1];
buffer->elems[j - 1].next = &buffer->elems[j];
}
buffer->elems[mdidx].prev = NULL;
buffer->elems[last_mdidx - 1].next = NULL;
/* track where we're up to */
mdidx = last_mdidx;
}
if (found_metadata) {
live_op_buffer->elems = buffer->elems;
if (mdidx != buffer->count) {
/* we have a partially read metadata batch still in incoming_metadata */
size_t new_count = buffer->count - mdidx;
size_t copy_bytes = sizeof(*buffer->elems) * new_count;
GPR_ASSERT(mdidx < buffer->count);
buffer->elems = gpr_malloc(copy_bytes);
memcpy(live_op_buffer->elems + mdidx, buffer->elems, copy_bytes);
buffer->count = buffer->capacity = new_count;
} else {
buffer->elems = NULL;
buffer->count = 0;
buffer->capacity = 0;
}
}
}
|
