| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "apr_memcache.h" |
| #include "apr_poll.h" |
| #include "apr_version.h" |
| #include <stdlib.h> |
| |
| struct apr_memcache_conn_t |
| { |
| apr_size_t blen; |
| apr_pool_t *p; |
| apr_socket_t *sock; |
| apr_bucket_alloc_t *balloc; |
| apr_bucket_brigade *bb; |
| apr_bucket_brigade *tb; |
| apr_memcache_server_t *ms; |
| }; |
| |
| #define REQ_MAGIC_BYTE (0xF) |
| |
| /* XXXX: sync these with memcached server impl */ |
| enum mc_cmd_type { |
| CMD_GET = 0, |
| CMD_SET = 1, |
| CMD_ADD = 2, |
| CMD_REPLACE = 3, |
| CMD_DELETE = 4, |
| CMD_INCR = 5, |
| CMD_DECR = 6, |
| CMD_QUIT = 7, |
| }; |
| |
| #define MC_STATUS_SUCCESS (0) |
| #define MC_STATUS_STORED (1) |
| #define MC_STATUS_NOT_STORED (2) |
| #define MC_STATUS_DELETED (3) |
| #define MC_STATUS_NOT_FOUND (4) |
| |
| /* XXXX: why isn't this in apr.h? */ |
| typedef unsigned char apr_uint8_t; |
| |
| typedef struct { |
| apr_uint8_t magic; |
| apr_uint8_t cmd; |
| union { |
| apr_uint8_t rep_status; |
| apr_uint8_t req_keylen; |
| }; |
| union { |
| apr_uint8_t req_reserved; |
| apr_uint8_t rep_reserved; |
| }; |
| apr_uint32_t opaque_id; |
| apr_uint32_t lenleft; |
| } apr_mc_hdr_t; |
| |
| #define MC_HDR_LEN (sizeof(apr_mc_hdr_t)) |
| |
| /** Server and Query Structure for a multiple get */ |
| struct cache_server_query_t { |
| apr_memcache_server_t* ms; |
| apr_memcache_conn_t* conn; |
| struct iovec* query_vec; |
| unsigned int query_vec_count; |
| }; |
| |
| #define MULT_GET_TIMEOUT 50000 |
| |
| static apr_status_t make_server_dead(apr_memcache_t *mc, apr_memcache_server_t *ms) |
| { |
| #if APR_HAS_THREADS |
| apr_thread_mutex_lock(ms->lock); |
| #endif |
| ms->status = APR_MC_SERVER_DEAD; |
| ms->btime = apr_time_now(); |
| #if APR_HAS_THREADS |
| apr_thread_mutex_unlock(ms->lock); |
| #endif |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t make_server_live(apr_memcache_t *mc, apr_memcache_server_t *ms) |
| { |
| ms->status = APR_MC_SERVER_LIVE; |
| return APR_SUCCESS; |
| } |
| |
| |
| APR_DECLARE(apr_status_t) apr_memcache_add_server(apr_memcache_t *mc, apr_memcache_server_t *ms) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| |
| if(mc->ntotal >= mc->nalloc) { |
| return APR_ENOMEM; |
| } |
| |
| mc->live_servers[mc->ntotal] = ms; |
| mc->ntotal++; |
| make_server_live(mc, ms); |
| return rv; |
| } |
| |
| static apr_status_t mc_version_ping(apr_memcache_server_t *ms); |
| |
| APR_DECLARE(apr_memcache_server_t *) |
| apr_memcache_find_server_hash(apr_memcache_t *mc, const apr_uint32_t hash) |
| { |
| if (mc->server_func) { |
| return mc->server_func(mc->server_baton, mc, hash); |
| } |
| else { |
| return apr_memcache_find_server_hash_default(NULL, mc, hash); |
| } |
| } |
| |
| APR_DECLARE(apr_memcache_server_t *) |
| apr_memcache_find_server_hash_default(void *baton, apr_memcache_t *mc, |
| const apr_uint32_t hash) |
| { |
| apr_memcache_server_t *ms = NULL; |
| apr_uint32_t h = hash ? hash : 1; |
| apr_uint32_t i = 0; |
| apr_time_t curtime = 0; |
| |
| if(mc->ntotal == 0) { |
| return NULL; |
| } |
| |
| do { |
| ms = mc->live_servers[h % mc->ntotal]; |
| if(ms->status == APR_MC_SERVER_LIVE) { |
| break; |
| } |
| else { |
| if (curtime == 0) { |
| curtime = apr_time_now(); |
| } |
| #if APR_HAS_THREADS |
| apr_thread_mutex_lock(ms->lock); |
| #endif |
| /* Try the the dead server, every 5 seconds */ |
| if (curtime - ms->btime > apr_time_from_sec(5)) { |
| if (mc_version_ping(ms) == APR_SUCCESS) { |
| ms->btime = curtime; |
| make_server_live(mc, ms); |
| #if APR_HAS_THREADS |
| apr_thread_mutex_unlock(ms->lock); |
| #endif |
| break; |
| } |
| } |
| #if APR_HAS_THREADS |
| apr_thread_mutex_unlock(ms->lock); |
| #endif |
| } |
| h++; |
| i++; |
| } while(i < mc->ntotal); |
| |
| if (i == mc->ntotal) { |
| ms = NULL; |
| } |
| |
| return ms; |
| } |
| |
| APR_DECLARE(apr_memcache_server_t *) apr_memcache_find_server(apr_memcache_t *mc, const char *host, apr_port_t port) |
| { |
| int i; |
| |
| for (i = 0; i < mc->ntotal; i++) { |
| if (strcmp(mc->live_servers[i]->host, host) == 0 |
| && mc->live_servers[i]->port == port) { |
| |
| return mc->live_servers[i]; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static apr_status_t ms_find_conn(apr_memcache_server_t *ms, apr_memcache_conn_t **conn) |
| { |
| #if APR_HAS_THREADS |
| return apr_reslist_acquire(ms->conns, (void **)conn); |
| #else |
| *conn = ms->conn; |
| return APR_SUCCESS; |
| #endif |
| } |
| |
| static apr_status_t ms_bad_conn(apr_memcache_server_t *ms, apr_memcache_conn_t *conn) |
| { |
| #if APR_HAS_THREADS |
| return apr_reslist_invalidate(ms->conns, conn); |
| #else |
| return APR_SUCCESS; |
| #endif |
| } |
| |
| static apr_status_t ms_release_conn(apr_memcache_server_t *ms, apr_memcache_conn_t *conn) |
| { |
| #if APR_HAS_THREADS |
| return apr_reslist_release(ms->conns, conn); |
| #else |
| return APR_SUCCESS; |
| #endif |
| } |
| |
| APR_DECLARE(apr_status_t) apr_memcache_enable_server(apr_memcache_t *mc, apr_memcache_server_t *ms) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| |
| if (ms->status == APR_MC_SERVER_LIVE) { |
| return rv; |
| } |
| |
| rv = make_server_live(mc, ms); |
| return rv; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_memcache_disable_server(apr_memcache_t *mc, apr_memcache_server_t *ms) |
| { |
| return make_server_dead(mc, ms); |
| } |
| |
| static apr_status_t conn_connect(apr_memcache_conn_t *conn) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| apr_sockaddr_t *sa; |
| |
| rv = apr_sockaddr_info_get(&sa, conn->ms->host, APR_INET, conn->ms->port, 0, conn->p); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_socket_timeout_set(conn->sock, 1 * APR_USEC_PER_SEC); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_socket_connect(conn->sock, sa); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_socket_timeout_set(conn->sock, -1); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| return rv; |
| } |
| |
| |
| static apr_status_t |
| mc_conn_construct(void **conn_, void *params, apr_pool_t *pool) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| apr_memcache_conn_t *conn; |
| apr_bucket *e; |
| apr_pool_t *np; |
| apr_memcache_server_t *ms = params; |
| |
| rv = apr_pool_create(&np, pool); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| conn = apr_palloc(np, sizeof( apr_memcache_conn_t )); |
| |
| conn->p = np; |
| |
| rv = apr_socket_create(&conn->sock, APR_INET, SOCK_STREAM, 0, np); |
| |
| if (rv != APR_SUCCESS) { |
| apr_pool_destroy(np); |
| return rv; |
| } |
| |
| conn->balloc = apr_bucket_alloc_create(conn->p); |
| conn->bb = apr_brigade_create(conn->p, conn->balloc); |
| conn->tb = apr_brigade_create(conn->p, conn->balloc); |
| conn->blen = 0; |
| conn->ms = ms; |
| |
| e = apr_bucket_socket_create(conn->sock, conn->balloc); |
| APR_BRIGADE_INSERT_TAIL(conn->bb, e); |
| |
| rv = conn_connect(conn); |
| if (rv != APR_SUCCESS) { |
| apr_pool_destroy(np); |
| } |
| else { |
| *conn_ = conn; |
| } |
| |
| return rv; |
| } |
| |
| static void setup_req_hdr(apr_mc_hdr_t *hdr, apr_uint8_t cmd) |
| { |
| hdr->magic = REQ_MAGIC_BYTE; |
| hdr->cmd = cmd; |
| hdr->req_keylen = 0; |
| hdr->req_reserved = 0; |
| hdr->opaque_id = 0; |
| hdr->lenleft = 0; |
| } |
| |
| static void finalize_req_hdr(apr_mc_hdr_t *hdr) |
| { |
| /* this isn't strictly needed, but will be nicer for protocol analyzers */ |
| hdr->opaque_id = htonl(hdr->opaque_id); |
| hdr->lenleft = htonl(hdr->lenleft); |
| } |
| |
| static void repair_hdr_rep(apr_mc_hdr_t *hdr) |
| { |
| hdr->opaque_id = ntohl(hdr->opaque_id); |
| hdr->lenleft = ntohl(hdr->lenleft); |
| } |
| |
| static apr_status_t brigade_split_offset(apr_bucket_brigade *bbOut, |
| apr_bucket_brigade *bbIn, |
| apr_read_type_e block, |
| apr_off_t offset) |
| { |
| apr_off_t readbytes = 0; |
| |
| while (!APR_BRIGADE_EMPTY(bbIn)) { |
| const char *str; |
| apr_size_t len; |
| apr_status_t rv; |
| apr_bucket *e; |
| |
| e = APR_BRIGADE_FIRST(bbIn); |
| rv = apr_bucket_read(e, &str, &len, block); |
| |
| if (rv != APR_SUCCESS) { |
| /* if we didn't read the entire thing, stick what we have buffered |
| * back into bbOut */ |
| if (!APR_BRIGADE_EMPTY(bbOut)) { |
| APR_BRIGADE_PREPEND(bbIn, bbOut); |
| } |
| return rv; |
| } |
| |
| if (readbytes+len > offset) { |
| apr_bucket_split(e, offset - readbytes); |
| APR_BUCKET_REMOVE(e); |
| APR_BRIGADE_INSERT_TAIL(bbOut, e); |
| return APR_SUCCESS; |
| } |
| |
| APR_BUCKET_REMOVE(e); |
| APR_BRIGADE_INSERT_TAIL(bbOut, e); |
| readbytes += len; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t get_server_rep(apr_memcache_conn_t *conn, apr_mc_hdr_t *hdr) |
| { |
| apr_size_t bsize = MC_HDR_LEN; |
| apr_status_t rv = APR_SUCCESS; |
| |
| rv = brigade_split_offset(conn->tb, conn->bb, APR_BLOCK_READ, bsize); |
| |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_brigade_flatten(conn->tb, (char*)hdr, &bsize); |
| |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| repair_hdr_rep(hdr); |
| |
| return apr_brigade_cleanup(conn->tb); |
| } |
| |
| |
| static apr_status_t |
| mc_conn_destruct(void *conn_, void *params, apr_pool_t *pool) |
| { |
| apr_memcache_conn_t *conn = (apr_memcache_conn_t*)conn_; |
| apr_mc_hdr_t hdr; |
| |
| struct iovec vec[2]; |
| apr_size_t written; |
| |
| /* send a quit message to the memcached server to be nice about it. */ |
| setup_req_hdr(&hdr, CMD_QUIT); |
| finalize_req_hdr(&hdr); |
| vec[0].iov_base = &hdr; |
| vec[0].iov_len = MC_HDR_LEN; |
| |
| /* Return values not checked, since we just want to make it go away. */ |
| apr_socket_sendv(conn->sock, vec, 1, &written); |
| apr_socket_close(conn->sock); |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_memcache_server_create(apr_pool_t *p, |
| const char *host, apr_port_t port, |
| apr_uint32_t min, apr_uint32_t smax, |
| apr_uint32_t max, apr_uint32_t ttl, |
| apr_memcache_server_t **ms) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| apr_memcache_server_t *server; |
| apr_pool_t *np; |
| |
| rv = apr_pool_create(&np, p); |
| |
| server = apr_palloc(np, sizeof(apr_memcache_server_t)); |
| |
| server->p = np; |
| server->host = apr_pstrdup(np, host); |
| server->port = port; |
| server->status = APR_MC_SERVER_DEAD; |
| #if APR_HAS_THREADS |
| rv = apr_thread_mutex_create(&server->lock, APR_THREAD_MUTEX_DEFAULT, np); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_reslist_create(&server->conns, |
| min, /* hard minimum */ |
| smax, /* soft maximum */ |
| max, /* hard maximum */ |
| ttl, /* Time to live */ |
| mc_conn_construct, /* Make a New Connection */ |
| mc_conn_destruct, /* Kill Old Connection */ |
| server, np); |
| #else |
| rv = mc_conn_construct((void**)&(server->conn), server, np); |
| #endif |
| |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| *ms = server; |
| |
| return rv; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_memcache_create(apr_pool_t *p, |
| apr_uint16_t max_servers, apr_uint32_t flags, |
| apr_memcache_t **memcache) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| apr_memcache_t *mc; |
| |
| mc = apr_palloc(p, sizeof(apr_memcache_t)); |
| mc->p = p; |
| mc->nalloc = max_servers; |
| mc->ntotal = 0; |
| mc->live_servers = apr_palloc(p, mc->nalloc * sizeof(struct apr_memcache_server_t *)); |
| mc->hash_func = NULL; |
| mc->hash_baton = NULL; |
| mc->server_func = NULL; |
| mc->server_baton = NULL; |
| *memcache = mc; |
| return rv; |
| } |
| |
| |
| /* The crc32 functions and data was originally written by Spencer |
| * Garrett <srg@quick.com> and was gleaned from the PostgreSQL source |
| * tree via the files contrib/ltree/crc32.[ch] and from FreeBSD at |
| * src/usr.bin/cksum/crc32.c. |
| */ |
| |
| static const apr_uint32_t crc32tab[256] = { |
| 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, |
| 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, |
| 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, |
| 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, |
| 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, |
| 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, |
| 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, |
| 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, |
| 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, |
| 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, |
| 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, |
| 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, |
| 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, |
| 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, |
| 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, |
| 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, |
| 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, |
| 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, |
| 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, |
| 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, |
| 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, |
| 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, |
| 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, |
| 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, |
| 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, |
| 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, |
| 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, |
| 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, |
| 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, |
| 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, |
| 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, |
| 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, |
| 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, |
| 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, |
| 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, |
| 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, |
| 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, |
| 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, |
| 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, |
| 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, |
| 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, |
| 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, |
| 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, |
| 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, |
| 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, |
| 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, |
| 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, |
| 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, |
| 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, |
| 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, |
| 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, |
| 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, |
| 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, |
| 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, |
| 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, |
| 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, |
| 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, |
| 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, |
| 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, |
| 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, |
| 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, |
| 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, |
| 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, |
| 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, |
| }; |
| |
| APR_DECLARE(apr_uint32_t) apr_memcache_hash_crc32(void *baton, |
| const char *data, |
| const apr_size_t data_len) |
| { |
| apr_uint32_t i; |
| apr_uint32_t crc; |
| crc = ~0; |
| |
| for (i = 0; i < data_len; i++) |
| crc = (crc >> 8) ^ crc32tab[(crc ^ (data[i])) & 0xff]; |
| |
| return ~crc; |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_memcache_hash_default(void *baton, |
| const char *data, |
| const apr_size_t data_len) |
| { |
| /* The default Perl Client doesn't actually use just crc32 -- it shifts it again |
| * like this.... |
| */ |
| return ((apr_memcache_hash_crc32(baton, data, data_len) >> 16) & 0x7fff); |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_memcache_hash(apr_memcache_t *mc, |
| const char *data, |
| const apr_size_t data_len) |
| { |
| if (mc->hash_func) { |
| return mc->hash_func(mc->hash_baton, data, data_len); |
| } |
| else { |
| return apr_memcache_hash_default(NULL, data, data_len); |
| } |
| } |
| |
| static apr_status_t storage_cmd_write(apr_memcache_t *mc, |
| apr_uint16_t cmdtype, |
| const char *key, |
| char *data, |
| const apr_size_t data_size, |
| apr_uint32_t timeout, |
| apr_uint16_t flags) |
| { |
| apr_mc_hdr_t hdr; |
| apr_uint32_t hash; |
| apr_memcache_server_t *ms; |
| apr_memcache_conn_t *conn; |
| apr_status_t rv; |
| apr_size_t written; |
| struct iovec vec[5]; |
| int klen; |
| |
| apr_size_t key_size = strlen(key); |
| |
| hash = apr_memcache_hash(mc, key, key_size); |
| |
| ms = apr_memcache_find_server_hash(mc, hash); |
| |
| if (ms == NULL) |
| return APR_NOTFOUND; |
| |
| rv = ms_find_conn(ms, &conn); |
| |
| if (rv != APR_SUCCESS) { |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| setup_req_hdr(&hdr, cmdtype); |
| hdr.req_keylen = key_size; |
| hdr.opaque_id = 1; |
| hdr.lenleft = 12 + key_size + data_size; |
| |
| finalize_req_hdr(&hdr); |
| |
| vec[0].iov_base = &hdr; |
| vec[0].iov_len = MC_HDR_LEN; |
| |
| flags = htonl(flags); |
| vec[1].iov_base = (void*)&flags; |
| vec[1].iov_len = sizeof(apr_uint32_t); |
| |
| timeout = htonl(timeout); |
| vec[2].iov_base = (void*)&timeout; |
| vec[2].iov_len = sizeof(apr_uint32_t); |
| |
| vec[3].iov_base = (void*)key; |
| vec[3].iov_len = key_size; |
| |
| vec[4].iov_base = data; |
| vec[4].iov_len = data_size; |
| |
| rv = apr_socket_sendv(conn->sock, vec, 5, &written); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| rv = get_server_rep(conn, &hdr); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| rv = APR_EGENERAL; |
| if (hdr.rep_status) { |
| if (hdr.rep_status == MC_STATUS_STORED) { |
| rv = APR_SUCCESS; |
| } |
| else if (hdr.rep_status == MC_STATUS_NOT_STORED) { |
| rv = APR_EEXIST; |
| } |
| } |
| |
| ms_release_conn(ms, conn); |
| |
| return rv; |
| } |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_set(apr_memcache_t *mc, |
| const char *key, |
| char *data, |
| const apr_size_t data_size, |
| apr_uint32_t timeout, |
| apr_uint16_t flags) |
| { |
| return storage_cmd_write(mc, |
| CMD_SET, |
| key, |
| data, data_size, |
| timeout, flags); |
| } |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_add(apr_memcache_t *mc, |
| const char *key, |
| char *data, |
| const apr_size_t data_size, |
| apr_uint32_t timeout, |
| apr_uint16_t flags) |
| { |
| return storage_cmd_write(mc, |
| CMD_ADD, |
| key, |
| data, data_size, |
| timeout, flags); |
| } |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_replace(apr_memcache_t *mc, |
| const char *key, |
| char *data, |
| const apr_size_t data_size, |
| apr_uint32_t timeout, |
| apr_uint16_t flags) |
| { |
| return storage_cmd_write(mc, |
| CMD_REPLACE, |
| key, |
| data, data_size, |
| timeout, flags); |
| |
| } |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_getp(apr_memcache_t *mc, |
| apr_pool_t *p, |
| const char *key, |
| char **baton, |
| apr_size_t *new_length, |
| apr_uint32_t *flags) |
| { |
| apr_mc_hdr_t hdr; |
| apr_status_t rv; |
| apr_memcache_server_t *ms; |
| apr_memcache_conn_t *conn; |
| apr_uint32_t hash; |
| apr_size_t written; |
| int klen = strlen(key); |
| struct iovec vec[2]; |
| |
| hash = apr_memcache_hash(mc, key, klen); |
| ms = apr_memcache_find_server_hash(mc, hash); |
| if (ms == NULL) |
| return APR_NOTFOUND; |
| |
| rv = ms_find_conn(ms, &conn); |
| |
| if (rv != APR_SUCCESS) { |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| setup_req_hdr(&hdr, CMD_GET); |
| hdr.req_keylen = klen; |
| hdr.opaque_id = 1; |
| hdr.lenleft = klen; |
| |
| finalize_req_hdr(&hdr); |
| |
| vec[0].iov_base = &hdr; |
| vec[0].iov_len = MC_HDR_LEN; |
| |
| vec[1].iov_base = (void*)key; |
| vec[1].iov_len = klen; |
| |
| rv = apr_socket_sendv(conn->sock, vec, 2, &written); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| rv = get_server_rep(conn, &hdr); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| { |
| apr_size_t len; |
| |
| rv = brigade_split_offset(conn->tb, conn->bb, APR_BLOCK_READ, hdr.lenleft); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| len = hdr.lenleft + 1; |
| |
| rv = apr_brigade_pflatten(conn->tb, baton, &len, p); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| apr_brigade_cleanup(conn->tb); |
| |
| *new_length = len - 1 - 4; |
| memcpy(flags, *baton, 4); |
| *flags = ntohl(*flags); |
| *baton = *baton + 4; |
| (*baton)[*new_length] = '\0'; |
| } |
| |
| ms_release_conn(ms, conn); |
| |
| return rv; |
| } |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_delete(apr_memcache_t *mc, |
| const char *key, |
| apr_uint32_t timeout) |
| { |
| apr_mc_hdr_t hdr; |
| apr_status_t rv; |
| apr_memcache_server_t *ms; |
| apr_memcache_conn_t *conn; |
| apr_uint32_t hash; |
| apr_size_t written; |
| struct iovec vec[3]; |
| int klen = strlen(key); |
| |
| hash = apr_memcache_hash(mc, key, klen); |
| ms = apr_memcache_find_server_hash(mc, hash); |
| if (ms == NULL) |
| return APR_NOTFOUND; |
| |
| rv = ms_find_conn(ms, &conn); |
| |
| if (rv != APR_SUCCESS) { |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| setup_req_hdr(&hdr, CMD_DELETE); |
| hdr.req_keylen = klen; |
| hdr.opaque_id = 1; |
| hdr.lenleft = klen; |
| |
| finalize_req_hdr(&hdr); |
| |
| vec[0].iov_base = &hdr; |
| vec[0].iov_len = MC_HDR_LEN; |
| |
| vec[1].iov_base = (void*)key; |
| vec[1].iov_len = klen; |
| |
| rv = apr_socket_sendv(conn->sock, vec, 2, &written); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| rv = get_server_rep(conn, &hdr); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| rv = APR_EGENERAL; |
| if (hdr.rep_status) { |
| if (hdr.rep_status == MC_STATUS_DELETED) { |
| rv = APR_SUCCESS; |
| } |
| else if (hdr.rep_status == MC_STATUS_NOT_FOUND) { |
| rv = APR_NOTFOUND; |
| } |
| } |
| |
| ms_release_conn(ms, conn); |
| |
| return rv; |
| } |
| |
| static apr_status_t num_cmd_write(apr_memcache_t *mc, |
| apr_uint8_t cmd, |
| const char *key, |
| const apr_int32_t inc, |
| apr_uint32_t *new_value) |
| { |
| apr_uint32_t tinc; |
| apr_mc_hdr_t hdr; |
| apr_status_t rv; |
| apr_memcache_server_t *ms; |
| apr_memcache_conn_t *conn; |
| apr_uint32_t hash; |
| apr_size_t written; |
| struct iovec vec[3]; |
| int klen = strlen(key); |
| |
| hash = apr_memcache_hash(mc, key, klen); |
| ms = apr_memcache_find_server_hash(mc, hash); |
| if (ms == NULL) |
| return APR_NOTFOUND; |
| |
| rv = ms_find_conn(ms, &conn); |
| |
| if (rv != APR_SUCCESS) { |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| setup_req_hdr(&hdr, CMD_DELETE); |
| hdr.req_keylen = klen; |
| hdr.opaque_id = 1; |
| hdr.lenleft = klen + 4; |
| |
| finalize_req_hdr(&hdr); |
| |
| vec[0].iov_base = &hdr; |
| vec[0].iov_len = MC_HDR_LEN; |
| |
| tinc = htonl(inc); |
| |
| vec[1].iov_base = (void*)&tinc; |
| vec[1].iov_len = sizeof(apr_uint32_t); |
| |
| vec[2].iov_base = (void*)key; |
| vec[2].iov_len = klen; |
| |
| rv = apr_socket_sendv(conn->sock, vec, 3, &written); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| rv = get_server_rep(conn, &hdr); |
| |
| if (rv != APR_SUCCESS) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| rv = APR_EGENERAL; |
| if (hdr.rep_status) { |
| if (hdr.rep_status == MC_STATUS_DELETED) { |
| rv = APR_SUCCESS; |
| } |
| else if (hdr.rep_status == MC_STATUS_NOT_FOUND) { |
| rv = APR_NOTFOUND; |
| } |
| } |
| else { |
| rv = brigade_split_offset(conn->tb, conn->bb, APR_BLOCK_READ, hdr.lenleft); |
| if (rv) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| if (new_value) { |
| apr_size_t len = 4; |
| rv = apr_brigade_flatten(conn->tb, (char*)new_value, &len); |
| if (rv) { |
| ms_bad_conn(ms, conn); |
| apr_memcache_disable_server(mc, ms); |
| return rv; |
| } |
| |
| *new_value = ntohl(*new_value); |
| |
| apr_brigade_cleanup(conn->tb); |
| } |
| } |
| |
| ms_release_conn(ms, conn); |
| |
| return rv; |
| } |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_incr(apr_memcache_t *mc, |
| const char *key, |
| apr_int32_t inc, |
| apr_uint32_t *new_value) |
| { |
| return num_cmd_write(mc, |
| CMD_INCR, |
| key, |
| inc, |
| new_value); |
| } |
| |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_decr(apr_memcache_t *mc, |
| const char *key, |
| apr_int32_t inc, |
| apr_uint32_t *new_value) |
| { |
| return num_cmd_write(mc, |
| CMD_DECR, |
| key, |
| inc, |
| new_value); |
| } |
| |
| |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_version(apr_memcache_server_t *ms, |
| apr_pool_t *p, |
| char **baton) |
| { |
| return APR_ENOTIMPL; |
| } |
| |
| apr_status_t mc_version_ping(apr_memcache_server_t *ms) |
| { |
| return APR_ENOTIMPL; |
| } |
| |
| APR_DECLARE(void) |
| apr_memcache_add_multget_key(apr_pool_t *data_pool, |
| const char* key, |
| apr_hash_t **values) |
| { |
| apr_memcache_value_t* value; |
| int klen = strlen(key); |
| |
| /* create the value hash if need be */ |
| if (!*values) { |
| *values = apr_hash_make(data_pool); |
| } |
| |
| /* init key and add it to the value hash */ |
| value = apr_pcalloc(data_pool, sizeof(apr_memcache_value_t)); |
| |
| value->status = APR_NOTFOUND; |
| value->key = apr_pstrdup(data_pool, key); |
| |
| apr_hash_set(*values, value->key, klen, value); |
| } |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_multgetp(apr_memcache_t *mc, |
| apr_pool_t *temp_pool, |
| apr_pool_t *data_pool, |
| apr_hash_t *values) |
| { |
| return APR_ENOTIMPL; |
| } |
| |
| |
| APR_DECLARE(apr_status_t) |
| apr_memcache_stats(apr_memcache_server_t *ms, |
| apr_pool_t *p, |
| apr_memcache_stats_t **stats) |
| { |
| return APR_ENOTIMPL; |
| } |
| |