Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Craig Tiller | 0605995 | 2015-02-18 08:34:56 -0800 | [diff] [blame] | 3 | * Copyright 2015, Google Inc. |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #include "src/core/transport/metadata.h" |
| 35 | |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 36 | #include <assert.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 37 | #include <stddef.h> |
| 38 | #include <string.h> |
| 39 | |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 40 | #include <grpc/compression.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 41 | #include <grpc/support/alloc.h> |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 42 | #include <grpc/support/atm.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 43 | #include <grpc/support/log.h> |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 44 | #include <grpc/support/string_util.h> |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 45 | #include <grpc/support/time.h> |
| 46 | #include "src/core/profiling/timers.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 47 | #include "src/core/support/murmur_hash.h" |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 48 | #include "src/core/support/string.h" |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 49 | #include "src/core/transport/chttp2/bin_encoder.h" |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 50 | #include "src/core/transport/static_metadata.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 51 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 52 | /* There are two kinds of mdelem and mdstr instances. |
| 53 | * Static instances are declared in static_metadata.{h,c} and |
| 54 | * are initialized by grpc_mdctx_global_init(). |
| 55 | * Dynamic instances are stored in hash tables on grpc_mdctx, and are backed |
| 56 | * by internal_string and internal_element structures. |
| 57 | * Internal helper functions here-in (is_mdstr_static, is_mdelem_static) are |
| 58 | * used to determine which kind of element a pointer refers to. |
| 59 | */ |
| 60 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 61 | #define INITIAL_STRTAB_CAPACITY 4 |
| 62 | #define INITIAL_MDTAB_CAPACITY 4 |
| 63 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 64 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 65 | #define DEBUG_ARGS , const char *file, int line |
| 66 | #define FWD_DEBUG_ARGS , file, line |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 67 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s), __FILE__, __LINE__) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 68 | #else |
| 69 | #define DEBUG_ARGS |
| 70 | #define FWD_DEBUG_ARGS |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 71 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s)) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 72 | #endif |
| 73 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 74 | #define TABLE_IDX(hash, log2_shards, capacity) \ |
| 75 | (((hash) >> (log2_shards)) % (capacity)) |
| 76 | #define SHARD_IDX(hash, log2_shards) ((hash) & ((1 << (log2_shards)) - 1)) |
| 77 | |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 78 | typedef void (*destroy_user_data_func)(void *user_data); |
| 79 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 80 | /* Shadow structure for grpc_mdstr for non-static values */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 81 | typedef struct internal_string { |
| 82 | /* must be byte compatible with grpc_mdstr */ |
| 83 | gpr_slice slice; |
| 84 | gpr_uint32 hash; |
| 85 | |
| 86 | /* private only data */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 87 | gpr_atm refcnt; |
| 88 | |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 89 | gpr_uint8 has_base64_and_huffman_encoded; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 90 | gpr_slice_refcount refcount; |
| 91 | |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 92 | gpr_slice base64_and_huffman; |
| 93 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 94 | struct internal_string *bucket_next; |
| 95 | } internal_string; |
| 96 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 97 | /* Shadow structure for grpc_mdelem for non-static elements */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 98 | typedef struct internal_metadata { |
| 99 | /* must be byte compatible with grpc_mdelem */ |
| 100 | internal_string *key; |
| 101 | internal_string *value; |
| 102 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 103 | /* private only data */ |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 104 | gpr_atm refcnt; |
| 105 | |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 106 | gpr_mu mu_user_data; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 107 | gpr_atm destroy_user_data; |
| 108 | gpr_atm user_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 109 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 110 | struct internal_metadata *bucket_next; |
| 111 | } internal_metadata; |
| 112 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 113 | typedef struct strtab_shard { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 114 | gpr_mu mu; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 115 | internal_string **strs; |
| 116 | size_t count; |
| 117 | size_t capacity; |
| 118 | } strtab_shard; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 119 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 120 | typedef struct mdtab_shard { |
| 121 | gpr_mu mu; |
| 122 | internal_metadata **elems; |
| 123 | size_t count; |
| 124 | size_t capacity; |
| 125 | size_t free; |
| 126 | } mdtab_shard; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 127 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 128 | #define LOG2_STRTAB_SHARD_COUNT 5 |
| 129 | #define LOG2_MDTAB_SHARD_COUNT 4 |
| 130 | #define STRTAB_SHARD_COUNT ((size_t)(1 << LOG2_STRTAB_SHARD_COUNT)) |
| 131 | #define MDTAB_SHARD_COUNT ((size_t)(1 << LOG2_MDTAB_SHARD_COUNT)) |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 132 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 133 | /* hash seed: decided at initialization time */ |
| 134 | static gpr_uint32 g_hash_seed; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 135 | static int g_forced_hash_seed = 0; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 136 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 137 | /* linearly probed hash tables for static element lookup */ |
| 138 | static grpc_mdstr *g_static_strtab[GRPC_STATIC_MDSTR_COUNT * 2]; |
| 139 | static grpc_mdelem *g_static_mdtab[GRPC_STATIC_MDELEM_COUNT * 2]; |
| 140 | static size_t g_static_strtab_maxprobe; |
| 141 | static size_t g_static_mdtab_maxprobe; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 142 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 143 | static strtab_shard g_strtab_shard[STRTAB_SHARD_COUNT]; |
| 144 | static mdtab_shard g_mdtab_shard[MDTAB_SHARD_COUNT]; |
| 145 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 146 | static void gc_mdtab(mdtab_shard *shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 147 | |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 148 | void grpc_test_only_set_metadata_hash_seed(gpr_uint32 seed) { |
| 149 | g_hash_seed = seed; |
| 150 | g_forced_hash_seed = 1; |
| 151 | } |
| 152 | |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 153 | void grpc_mdctx_global_init(void) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 154 | size_t i, j; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 155 | if (!g_forced_hash_seed) { |
| 156 | g_hash_seed = (gpr_uint32)gpr_now(GPR_CLOCK_REALTIME).tv_nsec; |
| 157 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 158 | g_static_strtab_maxprobe = 0; |
| 159 | g_static_mdtab_maxprobe = 0; |
| 160 | /* build static tables */ |
| 161 | memset(g_static_mdtab, 0, sizeof(g_static_mdtab)); |
| 162 | memset(g_static_strtab, 0, sizeof(g_static_strtab)); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 163 | for (i = 0; i < GRPC_STATIC_MDSTR_COUNT; i++) { |
| 164 | grpc_mdstr *elem = &grpc_static_mdstr_table[i]; |
| 165 | const char *str = grpc_static_metadata_strings[i]; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 166 | gpr_uint32 hash = gpr_murmur_hash3(str, strlen(str), g_hash_seed); |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 167 | *(gpr_slice *)&elem->slice = gpr_slice_from_static_string(str); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 168 | *(gpr_uint32 *)&elem->hash = hash; |
| 169 | for (j = 0;; j++) { |
| 170 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_strtab); |
| 171 | if (g_static_strtab[idx] == NULL) { |
| 172 | g_static_strtab[idx] = &grpc_static_mdstr_table[i]; |
| 173 | break; |
| 174 | } |
| 175 | } |
| 176 | if (j > g_static_strtab_maxprobe) { |
| 177 | g_static_strtab_maxprobe = j; |
| 178 | } |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 179 | } |
| 180 | for (i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) { |
| 181 | grpc_mdelem *elem = &grpc_static_mdelem_table[i]; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 182 | grpc_mdstr *key = |
| 183 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 0]]; |
| 184 | grpc_mdstr *value = |
| 185 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 1]]; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 186 | gpr_uint32 hash = GRPC_MDSTR_KV_HASH(key->hash, value->hash); |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 187 | *(grpc_mdstr **)&elem->key = key; |
| 188 | *(grpc_mdstr **)&elem->value = value; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 189 | for (j = 0;; j++) { |
| 190 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 191 | if (g_static_mdtab[idx] == NULL) { |
| 192 | g_static_mdtab[idx] = elem; |
| 193 | break; |
| 194 | } |
| 195 | } |
| 196 | if (j > g_static_mdtab_maxprobe) { |
| 197 | g_static_mdtab_maxprobe = j; |
| 198 | } |
| 199 | } |
| 200 | /* initialize shards */ |
| 201 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 202 | strtab_shard *shard = &g_strtab_shard[i]; |
| 203 | gpr_mu_init(&shard->mu); |
| 204 | shard->count = 0; |
| 205 | shard->capacity = INITIAL_STRTAB_CAPACITY; |
| 206 | shard->strs = gpr_malloc(sizeof(*shard->strs) * shard->capacity); |
| 207 | memset(shard->strs, 0, sizeof(*shard->strs) * shard->capacity); |
| 208 | } |
| 209 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 210 | mdtab_shard *shard = &g_mdtab_shard[i]; |
| 211 | gpr_mu_init(&shard->mu); |
| 212 | shard->count = 0; |
| 213 | shard->free = 0; |
| 214 | shard->capacity = INITIAL_MDTAB_CAPACITY; |
| 215 | shard->elems = gpr_malloc(sizeof(*shard->elems) * shard->capacity); |
| 216 | memset(shard->elems, 0, sizeof(*shard->elems) * shard->capacity); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 217 | } |
| 218 | } |
| 219 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 220 | void grpc_mdctx_global_shutdown(void) { |
| 221 | size_t i; |
| 222 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 223 | mdtab_shard *shard = &g_mdtab_shard[i]; |
| 224 | gpr_mu_destroy(&shard->mu); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 225 | gc_mdtab(shard); |
| 226 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 227 | if (shard->count != 0) { |
yang-g | d88e1d8 | 2015-12-02 13:23:33 -0800 | [diff] [blame] | 228 | gpr_log(GPR_DEBUG, "WARNING: %d metadata elements were leaked", |
| 229 | shard->count); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 230 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 231 | gpr_free(shard->elems); |
| 232 | } |
| 233 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 234 | strtab_shard *shard = &g_strtab_shard[i]; |
| 235 | gpr_mu_destroy(&shard->mu); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 236 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 237 | if (shard->count != 0) { |
yang-g | d88e1d8 | 2015-12-02 13:23:33 -0800 | [diff] [blame] | 238 | gpr_log(GPR_DEBUG, "WARNING: %d metadata strings were leaked", |
| 239 | shard->count); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 240 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 241 | gpr_free(shard->strs); |
| 242 | } |
| 243 | } |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 244 | |
| 245 | static int is_mdstr_static(grpc_mdstr *s) { |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 246 | return s >= &grpc_static_mdstr_table[0] && |
| 247 | s < &grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | static int is_mdelem_static(grpc_mdelem *e) { |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 251 | return e >= &grpc_static_mdelem_table[0] && |
| 252 | e < &grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 253 | } |
| 254 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 255 | static void ref_md_locked(mdtab_shard *shard, |
| 256 | internal_metadata *md DEBUG_ARGS) { |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 257 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 258 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 259 | "ELM REF:%p:%d->%d: '%s' = '%s'", md, |
| 260 | gpr_atm_no_barrier_load(&md->refcnt), |
| 261 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 262 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 263 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 264 | #endif |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 265 | if (0 == gpr_atm_no_barrier_fetch_add(&md->refcnt, 2)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 266 | shard->free--; |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 267 | } else { |
| 268 | GPR_ASSERT(1 != gpr_atm_no_barrier_fetch_add(&md->refcnt, -1)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 269 | } |
| 270 | } |
| 271 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 272 | static void grow_strtab(strtab_shard *shard) { |
| 273 | size_t capacity = shard->capacity * 2; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 274 | size_t i; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 275 | internal_string **strtab; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 276 | internal_string *s, *next; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 277 | |
| 278 | GPR_TIMER_BEGIN("grow_strtab", 0); |
| 279 | |
| 280 | strtab = gpr_malloc(sizeof(internal_string *) * capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 281 | memset(strtab, 0, sizeof(internal_string *) * capacity); |
| 282 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 283 | for (i = 0; i < shard->capacity; i++) { |
| 284 | for (s = shard->strs[i]; s; s = next) { |
| 285 | size_t idx = TABLE_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT, capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 286 | next = s->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 287 | s->bucket_next = strtab[idx]; |
| 288 | strtab[idx] = s; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 289 | } |
| 290 | } |
| 291 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 292 | gpr_free(shard->strs); |
| 293 | shard->strs = strtab; |
| 294 | shard->capacity = capacity; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 295 | |
| 296 | GPR_TIMER_END("grow_strtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 297 | } |
| 298 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 299 | static void internal_destroy_string(strtab_shard *shard, internal_string *is) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 300 | internal_string **prev_next; |
| 301 | internal_string *cur; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 302 | GPR_TIMER_BEGIN("internal_destroy_string", 0); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 303 | if (is->has_base64_and_huffman_encoded) { |
| 304 | gpr_slice_unref(is->base64_and_huffman); |
| 305 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 306 | for (prev_next = &shard->strs[TABLE_IDX(is->hash, LOG2_STRTAB_SHARD_COUNT, |
| 307 | shard->capacity)], |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 308 | cur = *prev_next; |
| 309 | cur != is; prev_next = &cur->bucket_next, cur = cur->bucket_next) |
| 310 | ; |
| 311 | *prev_next = cur->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 312 | shard->count--; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 313 | gpr_free(is); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 314 | GPR_TIMER_END("internal_destroy_string", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 315 | } |
| 316 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 317 | static void slice_ref(void *p) { |
| 318 | internal_string *is = |
| 319 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 320 | GRPC_MDSTR_REF((grpc_mdstr *)(is)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | static void slice_unref(void *p) { |
| 324 | internal_string *is = |
| 325 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 326 | GRPC_MDSTR_UNREF((grpc_mdstr *)(is)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 327 | } |
| 328 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 329 | grpc_mdstr *grpc_mdstr_from_string(const char *str) { |
| 330 | return grpc_mdstr_from_buffer((const gpr_uint8 *)str, strlen(str)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 331 | } |
| 332 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 333 | grpc_mdstr *grpc_mdstr_from_slice(gpr_slice slice) { |
| 334 | grpc_mdstr *result = grpc_mdstr_from_buffer(GPR_SLICE_START_PTR(slice), |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 335 | GPR_SLICE_LENGTH(slice)); |
| 336 | gpr_slice_unref(slice); |
| 337 | return result; |
| 338 | } |
| 339 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 340 | grpc_mdstr *grpc_mdstr_from_buffer(const gpr_uint8 *buf, size_t length) { |
| 341 | gpr_uint32 hash = gpr_murmur_hash3(buf, length, g_hash_seed); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 342 | internal_string *s; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 343 | strtab_shard *shard = |
| 344 | &g_strtab_shard[SHARD_IDX(hash, LOG2_STRTAB_SHARD_COUNT)]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 345 | size_t i; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 346 | size_t idx; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 347 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 348 | GPR_TIMER_BEGIN("grpc_mdstr_from_buffer", 0); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 349 | |
| 350 | /* search for a static string */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 351 | for (i = 0; i <= g_static_strtab_maxprobe; i++) { |
| 352 | grpc_mdstr *ss; |
| 353 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_strtab); |
| 354 | ss = g_static_strtab[idx]; |
| 355 | if (ss == NULL) break; |
| 356 | if (ss->hash == hash && GPR_SLICE_LENGTH(ss->slice) == length && |
| 357 | 0 == memcmp(buf, GPR_SLICE_START_PTR(ss->slice), length)) { |
Craig Tiller | 07718b8 | 2015-11-21 14:06:45 -0800 | [diff] [blame] | 358 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 359 | return ss; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 360 | } |
| 361 | } |
| 362 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 363 | gpr_mu_lock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 364 | |
| 365 | /* search for an existing string */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 366 | idx = TABLE_IDX(hash, LOG2_STRTAB_SHARD_COUNT, shard->capacity); |
| 367 | for (s = shard->strs[idx]; s; s = s->bucket_next) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 368 | if (s->hash == hash && GPR_SLICE_LENGTH(s->slice) == length && |
| 369 | 0 == memcmp(buf, GPR_SLICE_START_PTR(s->slice), length)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 370 | GRPC_MDSTR_REF((grpc_mdstr *)s); |
| 371 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 372 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 373 | return (grpc_mdstr *)s; |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | /* not found: create a new string */ |
| 378 | if (length + 1 < GPR_SLICE_INLINED_SIZE) { |
| 379 | /* string data goes directly into the slice */ |
| 380 | s = gpr_malloc(sizeof(internal_string)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 381 | gpr_atm_rel_store(&s->refcnt, 2); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 382 | s->slice.refcount = NULL; |
| 383 | memcpy(s->slice.data.inlined.bytes, buf, length); |
| 384 | s->slice.data.inlined.bytes[length] = 0; |
Craig Tiller | 6a6b36c | 2015-09-10 16:00:22 -0700 | [diff] [blame] | 385 | s->slice.data.inlined.length = (gpr_uint8)length; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 386 | } else { |
| 387 | /* string data goes after the internal_string header, and we +1 for null |
| 388 | terminator */ |
| 389 | s = gpr_malloc(sizeof(internal_string) + length + 1); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 390 | gpr_atm_rel_store(&s->refcnt, 2); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 391 | s->refcount.ref = slice_ref; |
| 392 | s->refcount.unref = slice_unref; |
| 393 | s->slice.refcount = &s->refcount; |
| 394 | s->slice.data.refcounted.bytes = (gpr_uint8 *)(s + 1); |
| 395 | s->slice.data.refcounted.length = length; |
| 396 | memcpy(s->slice.data.refcounted.bytes, buf, length); |
| 397 | /* add a null terminator for cheap c string conversion when desired */ |
| 398 | s->slice.data.refcounted.bytes[length] = 0; |
| 399 | } |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 400 | s->has_base64_and_huffman_encoded = 0; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 401 | s->hash = hash; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 402 | s->bucket_next = shard->strs[idx]; |
| 403 | shard->strs[idx] = s; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 404 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 405 | shard->count++; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 406 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 407 | if (shard->count > shard->capacity * 2) { |
| 408 | grow_strtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 409 | } |
| 410 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 411 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 412 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 413 | |
| 414 | return (grpc_mdstr *)s; |
| 415 | } |
| 416 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 417 | static void gc_mdtab(mdtab_shard *shard) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 418 | size_t i; |
| 419 | internal_metadata **prev_next; |
| 420 | internal_metadata *md, *next; |
| 421 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 422 | GPR_TIMER_BEGIN("gc_mdtab", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 423 | for (i = 0; i < shard->capacity; i++) { |
| 424 | prev_next = &shard->elems[i]; |
| 425 | for (md = shard->elems[i]; md; md = next) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 426 | void *user_data = (void *)gpr_atm_no_barrier_load(&md->user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 427 | next = md->bucket_next; |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 428 | if (gpr_atm_acq_load(&md->refcnt) == 0) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 429 | GRPC_MDSTR_UNREF((grpc_mdstr *)md->key); |
| 430 | GRPC_MDSTR_UNREF((grpc_mdstr *)md->value); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 431 | if (md->user_data) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 432 | ((destroy_user_data_func)gpr_atm_no_barrier_load( |
| 433 | &md->destroy_user_data))(user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 434 | } |
| 435 | gpr_free(md); |
| 436 | *prev_next = next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 437 | shard->free--; |
| 438 | shard->count--; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 439 | } else { |
| 440 | prev_next = &md->bucket_next; |
| 441 | } |
| 442 | } |
| 443 | } |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 444 | GPR_TIMER_END("gc_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 445 | } |
| 446 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 447 | static void grow_mdtab(mdtab_shard *shard) { |
| 448 | size_t capacity = shard->capacity * 2; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 449 | size_t i; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 450 | internal_metadata **mdtab; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 451 | internal_metadata *md, *next; |
| 452 | gpr_uint32 hash; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 453 | |
| 454 | GPR_TIMER_BEGIN("grow_mdtab", 0); |
| 455 | |
| 456 | mdtab = gpr_malloc(sizeof(internal_metadata *) * capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 457 | memset(mdtab, 0, sizeof(internal_metadata *) * capacity); |
| 458 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 459 | for (i = 0; i < shard->capacity; i++) { |
| 460 | for (md = shard->elems[i]; md; md = next) { |
| 461 | size_t idx; |
ctiller | fb93d19 | 2014-12-15 10:40:05 -0800 | [diff] [blame] | 462 | hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 463 | next = md->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 464 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, capacity); |
| 465 | md->bucket_next = mdtab[idx]; |
| 466 | mdtab[idx] = md; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 467 | } |
| 468 | } |
| 469 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 470 | gpr_free(shard->elems); |
| 471 | shard->elems = mdtab; |
| 472 | shard->capacity = capacity; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 473 | |
| 474 | GPR_TIMER_END("grow_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 475 | } |
| 476 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 477 | static void rehash_mdtab(mdtab_shard *shard) { |
| 478 | if (shard->free > shard->capacity / 4) { |
| 479 | gc_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 480 | } else { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 481 | grow_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 482 | } |
| 483 | } |
| 484 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 485 | grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_mdstr *mkey, |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 486 | grpc_mdstr *mvalue) { |
| 487 | internal_string *key = (internal_string *)mkey; |
| 488 | internal_string *value = (internal_string *)mvalue; |
ctiller | fb93d19 | 2014-12-15 10:40:05 -0800 | [diff] [blame] | 489 | gpr_uint32 hash = GRPC_MDSTR_KV_HASH(mkey->hash, mvalue->hash); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 490 | internal_metadata *md; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 491 | mdtab_shard *shard = &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 492 | size_t i; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 493 | size_t idx; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 494 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 495 | GPR_TIMER_BEGIN("grpc_mdelem_from_metadata_strings", 0); |
| 496 | |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 497 | if (is_mdstr_static(mkey) && is_mdstr_static(mvalue)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 498 | for (i = 0; i <= g_static_mdtab_maxprobe; i++) { |
| 499 | grpc_mdelem *smd; |
| 500 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 501 | smd = g_static_mdtab[idx]; |
| 502 | if (smd == NULL) break; |
| 503 | if (smd->key == mkey && smd->value == mvalue) { |
Craig Tiller | 07718b8 | 2015-11-21 14:06:45 -0800 | [diff] [blame] | 504 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 505 | return smd; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 506 | } |
| 507 | } |
| 508 | } |
| 509 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 510 | gpr_mu_lock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 511 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 512 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, shard->capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 513 | /* search for an existing pair */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 514 | for (md = shard->elems[idx]; md; md = md->bucket_next) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 515 | if (md->key == key && md->value == value) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 516 | REF_MD_LOCKED(shard, md); |
| 517 | GRPC_MDSTR_UNREF((grpc_mdstr *)key); |
| 518 | GRPC_MDSTR_UNREF((grpc_mdstr *)value); |
| 519 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 520 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 521 | return (grpc_mdelem *)md; |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | /* not found: create a new pair */ |
| 526 | md = gpr_malloc(sizeof(internal_metadata)); |
Craig Tiller | 63bda56 | 2015-10-09 17:40:19 -0700 | [diff] [blame] | 527 | gpr_atm_rel_store(&md->refcnt, 2); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 528 | md->key = key; |
| 529 | md->value = value; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 530 | md->user_data = 0; |
| 531 | md->destroy_user_data = 0; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 532 | md->bucket_next = shard->elems[idx]; |
| 533 | shard->elems[idx] = md; |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 534 | gpr_mu_init(&md->mu_user_data); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 535 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 536 | gpr_log(GPR_DEBUG, "ELM NEW:%p:%d: '%s' = '%s'", md, |
| 537 | gpr_atm_no_barrier_load(&md->refcnt), |
| 538 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 539 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 540 | #endif |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 541 | shard->count++; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 542 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 543 | if (shard->count > shard->capacity * 2) { |
| 544 | rehash_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 545 | } |
| 546 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 547 | gpr_mu_unlock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 548 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 549 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
| 550 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 551 | return (grpc_mdelem *)md; |
| 552 | } |
| 553 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 554 | grpc_mdelem *grpc_mdelem_from_strings(const char *key, const char *value) { |
| 555 | return grpc_mdelem_from_metadata_strings(grpc_mdstr_from_string(key), |
| 556 | grpc_mdstr_from_string(value)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 557 | } |
| 558 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 559 | grpc_mdelem *grpc_mdelem_from_slices(gpr_slice key, gpr_slice value) { |
| 560 | return grpc_mdelem_from_metadata_strings(grpc_mdstr_from_slice(key), |
| 561 | grpc_mdstr_from_slice(value)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 562 | } |
| 563 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 564 | grpc_mdelem *grpc_mdelem_from_string_and_buffer(const char *key, |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 565 | const gpr_uint8 *value, |
Craig Tiller | 4dbdd6a | 2015-09-25 15:12:16 -0700 | [diff] [blame] | 566 | size_t value_length) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 567 | return grpc_mdelem_from_metadata_strings( |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 568 | grpc_mdstr_from_string(key), grpc_mdstr_from_buffer(value, value_length)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 569 | } |
| 570 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 571 | grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 572 | internal_metadata *md = (internal_metadata *)gmd; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 573 | if (is_mdelem_static(gmd)) return gmd; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 574 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 575 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 576 | "ELM REF:%p:%d->%d: '%s' = '%s'", md, |
| 577 | gpr_atm_no_barrier_load(&md->refcnt), |
| 578 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 579 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 580 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 581 | #endif |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 582 | /* we can assume the ref count is >= 1 as the application is calling |
| 583 | this function - meaning that no adjustment to mdtab_free is necessary, |
| 584 | simplifying the logic here to be just an atomic increment */ |
| 585 | /* use C assert to have this removed in opt builds */ |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 586 | assert(gpr_atm_no_barrier_load(&md->refcnt) >= 2); |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 587 | gpr_atm_no_barrier_fetch_add(&md->refcnt, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 588 | return gmd; |
| 589 | } |
| 590 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 591 | void grpc_mdelem_unref(grpc_mdelem *gmd DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 592 | internal_metadata *md = (internal_metadata *)gmd; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 593 | if (!md) return; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 594 | if (is_mdelem_static(gmd)) return; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 595 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 596 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 597 | "ELM UNREF:%p:%d->%d: '%s' = '%s'", md, |
| 598 | gpr_atm_no_barrier_load(&md->refcnt), |
| 599 | gpr_atm_no_barrier_load(&md->refcnt) - 1, |
| 600 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 601 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 602 | #endif |
Craig Tiller | 63bda56 | 2015-10-09 17:40:19 -0700 | [diff] [blame] | 603 | if (2 == gpr_atm_full_fetch_add(&md->refcnt, -1)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 604 | gpr_uint32 hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
| 605 | mdtab_shard *shard = |
| 606 | &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 607 | GPR_TIMER_BEGIN("grpc_mdelem_unref.to_zero", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 608 | gpr_mu_lock(&shard->mu); |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 609 | if (1 == gpr_atm_no_barrier_load(&md->refcnt)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 610 | shard->free++; |
Craig Tiller | b8e8267 | 2015-10-10 13:52:47 -0700 | [diff] [blame] | 611 | gpr_atm_no_barrier_store(&md->refcnt, 0); |
| 612 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 613 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 614 | GPR_TIMER_END("grpc_mdelem_unref.to_zero", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 615 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 616 | } |
| 617 | |
| 618 | const char *grpc_mdstr_as_c_string(grpc_mdstr *s) { |
| 619 | return (const char *)GPR_SLICE_START_PTR(s->slice); |
| 620 | } |
| 621 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 622 | grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 623 | internal_string *s = (internal_string *)gs; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 624 | if (is_mdstr_static(gs)) return gs; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 625 | GPR_ASSERT(gpr_atm_full_fetch_add(&s->refcnt, 1) != 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 626 | return gs; |
| 627 | } |
| 628 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 629 | void grpc_mdstr_unref(grpc_mdstr *gs DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 630 | internal_string *s = (internal_string *)gs; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 631 | if (is_mdstr_static(gs)) return; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 632 | if (2 == gpr_atm_full_fetch_add(&s->refcnt, -1)) { |
| 633 | strtab_shard *shard = |
| 634 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 635 | gpr_mu_lock(&shard->mu); |
| 636 | if (1 == gpr_atm_no_barrier_load(&s->refcnt)) { |
| 637 | internal_destroy_string(shard, s); |
| 638 | } |
| 639 | gpr_mu_unlock(&shard->mu); |
| 640 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 641 | } |
| 642 | |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 643 | void *grpc_mdelem_get_user_data(grpc_mdelem *md, void (*destroy_func)(void *)) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 644 | internal_metadata *im = (internal_metadata *)md; |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 645 | void *result; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 646 | if (is_mdelem_static(md)) { |
| 647 | return (void *)grpc_static_mdelem_user_data[md - grpc_static_mdelem_table]; |
| 648 | } |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 649 | if (gpr_atm_acq_load(&im->destroy_user_data) == (gpr_atm)destroy_func) { |
| 650 | return (void *)gpr_atm_no_barrier_load(&im->user_data); |
| 651 | } else { |
| 652 | return NULL; |
| 653 | } |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 654 | return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 655 | } |
| 656 | |
| 657 | void grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *), |
| 658 | void *user_data) { |
| 659 | internal_metadata *im = (internal_metadata *)md; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 660 | GPR_ASSERT(!is_mdelem_static(md)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 661 | GPR_ASSERT((user_data == NULL) == (destroy_func == NULL)); |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 662 | gpr_mu_lock(&im->mu_user_data); |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 663 | if (gpr_atm_no_barrier_load(&im->destroy_user_data)) { |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 664 | /* user data can only be set once */ |
| 665 | gpr_mu_unlock(&im->mu_user_data); |
| 666 | if (destroy_func != NULL) { |
| 667 | destroy_func(user_data); |
| 668 | } |
| 669 | return; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 670 | } |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 671 | gpr_atm_no_barrier_store(&im->user_data, (gpr_atm)user_data); |
| 672 | gpr_atm_rel_store(&im->destroy_user_data, (gpr_atm)destroy_func); |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 673 | gpr_mu_unlock(&im->mu_user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 674 | } |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 675 | |
| 676 | gpr_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) { |
| 677 | internal_string *s = (internal_string *)gs; |
| 678 | gpr_slice slice; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 679 | strtab_shard *shard = |
| 680 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 681 | gpr_mu_lock(&shard->mu); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 682 | if (!s->has_base64_and_huffman_encoded) { |
| 683 | s->base64_and_huffman = |
| 684 | grpc_chttp2_base64_encode_and_huffman_compress(s->slice); |
ctiller | 33023c4 | 2014-12-12 16:28:33 -0800 | [diff] [blame] | 685 | s->has_base64_and_huffman_encoded = 1; |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 686 | } |
| 687 | slice = s->base64_and_huffman; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 688 | gpr_mu_unlock(&shard->mu); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 689 | return slice; |
Craig Tiller | 190d360 | 2015-02-18 09:23:38 -0800 | [diff] [blame] | 690 | } |
Craig Tiller | fe0104a | 2015-04-14 09:19:12 -0700 | [diff] [blame] | 691 | |
Craig Tiller | 49772e0 | 2015-08-21 08:08:37 -0700 | [diff] [blame] | 692 | static int conforms_to(grpc_mdstr *s, const gpr_uint8 *legal_bits) { |
Craig Tiller | b96d001 | 2015-05-06 15:33:23 -0700 | [diff] [blame] | 693 | const gpr_uint8 *p = GPR_SLICE_START_PTR(s->slice); |
| 694 | const gpr_uint8 *e = GPR_SLICE_END_PTR(s->slice); |
| 695 | for (; p != e; p++) { |
Craig Tiller | 49772e0 | 2015-08-21 08:08:37 -0700 | [diff] [blame] | 696 | int idx = *p; |
| 697 | int byte = idx / 8; |
| 698 | int bit = idx % 8; |
| 699 | if ((legal_bits[byte] & (1 << bit)) == 0) return 0; |
Craig Tiller | b96d001 | 2015-05-06 15:33:23 -0700 | [diff] [blame] | 700 | } |
| 701 | return 1; |
| 702 | } |
| 703 | |
Craig Tiller | 49772e0 | 2015-08-21 08:08:37 -0700 | [diff] [blame] | 704 | int grpc_mdstr_is_legal_header(grpc_mdstr *s) { |
| 705 | static const gpr_uint8 legal_header_bits[256 / 8] = { |
Craig Tiller | 80aa280 | 2015-08-21 08:50:51 -0700 | [diff] [blame] | 706 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0xff, 0x03, 0x00, 0x00, 0x00, |
| 707 | 0x80, 0xfe, 0xff, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
Craig Tiller | 49772e0 | 2015-08-21 08:08:37 -0700 | [diff] [blame] | 708 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
Craig Tiller | 49772e0 | 2015-08-21 08:08:37 -0700 | [diff] [blame] | 709 | return conforms_to(s, legal_header_bits); |
| 710 | } |
| 711 | |
| 712 | int grpc_mdstr_is_legal_nonbin_header(grpc_mdstr *s) { |
| 713 | static const gpr_uint8 legal_header_bits[256 / 8] = { |
Craig Tiller | 934e9d7 | 2015-12-09 12:58:29 -0800 | [diff] [blame^] | 714 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
Craig Tiller | 49772e0 | 2015-08-21 08:08:37 -0700 | [diff] [blame] | 715 | 0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 716 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
| 717 | return conforms_to(s, legal_header_bits); |
| 718 | } |
| 719 | |
Craig Tiller | b96d001 | 2015-05-06 15:33:23 -0700 | [diff] [blame] | 720 | int grpc_mdstr_is_bin_suffixed(grpc_mdstr *s) { |
| 721 | /* TODO(ctiller): consider caching this */ |
| 722 | return grpc_is_binary_header((const char *)GPR_SLICE_START_PTR(s->slice), |
| 723 | GPR_SLICE_LENGTH(s->slice)); |
| 724 | } |