/* 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> #define BUFFER_SIZE 512 struct apr_memcache_conn_t { char *buffer; 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; }; /* Strings for Client Commands */ #define MC_EOL "\r\n" #define MC_EOL_LEN (sizeof(MC_EOL)-1) #define MC_WS " " #define MC_WS_LEN (sizeof(MC_WS)-1) #define MC_GET "get " #define MC_GET_LEN (sizeof(MC_GET)-1) #define MC_SET "set " #define MC_SET_LEN (sizeof(MC_SET)-1) #define MC_ADD "add " #define MC_ADD_LEN (sizeof(MC_ADD)-1) #define MC_REPLACE "replace " #define MC_REPLACE_LEN (sizeof(MC_REPLACE)-1) #define MC_DELETE "delete " #define MC_DELETE_LEN (sizeof(MC_DELETE)-1) #define MC_INCR "incr " #define MC_INCR_LEN (sizeof(MC_INCR)-1) #define MC_DECR "decr " #define MC_DECR_LEN (sizeof(MC_DECR)-1) #define MC_VERSION "version" #define MC_VERSION_LEN (sizeof(MC_VERSION)-1) #define MC_STATS "stats" #define MC_STATS_LEN (sizeof(MC_STATS)-1) #define MC_QUIT "quit" #define MC_QUIT_LEN (sizeof(MC_QUIT)-1) /* Strings for Server Replies */ #define MS_STORED "STORED" #define MS_STORED_LEN (sizeof(MS_STORED)-1) #define MS_NOT_STORED "NOT_STORED" #define MS_NOT_STORED_LEN (sizeof(MS_NOT_STORED)-1) #define MS_DELETED "DELETED" #define MS_DELETED_LEN (sizeof(MS_DELETED)-1) #define MS_NOT_FOUND "NOT_FOUND" #define MS_NOT_FOUND_LEN (sizeof(MS_NOT_FOUND)-1) #define MS_VALUE "VALUE" #define MS_VALUE_LEN (sizeof(MS_VALUE)-1) #define MS_ERROR "ERROR" #define MS_ERROR_LEN (sizeof(MS_ERROR)-1) #define MS_VERSION "VERSION" #define MS_VERSION_LEN (sizeof(MS_VERSION)-1) #define MS_STAT "STAT" #define MS_STAT_LEN (sizeof(MS_STAT)-1) #define MS_END "END" #define MS_END_LEN (sizeof(MS_END)-1) /** 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; apr_int32_t 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; } APU_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); APU_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); } } APU_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; } APU_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 } APU_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; } APU_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 conn_clean(void *data) { apr_memcache_conn_t *conn = data; struct iovec vec[2]; apr_size_t written; /* send a quit message to the memcached server to be nice about it. */ vec[0].iov_base = MC_QUIT; vec[0].iov_len = MC_QUIT_LEN; vec[1].iov_base = MC_EOL; vec[1].iov_len = MC_EOL_LEN; /* Return values not checked, since we just want to make it go away. */ apr_socket_sendv(conn->sock, vec, 2, &written); apr_socket_close(conn->sock); conn->p = NULL; /* so that destructor does not destroy the pool again */ return APR_SUCCESS; } 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; } #if APR_HAS_THREADS conn = malloc(sizeof( apr_memcache_conn_t )); /* non-pool space! */ #else conn = apr_palloc(np, sizeof( apr_memcache_conn_t )); #endif conn->p = np; rv = apr_socket_create(&conn->sock, APR_INET, SOCK_STREAM, 0, np); if (rv != APR_SUCCESS) { apr_pool_destroy(np); #if APR_HAS_THREADS free(conn); #endif 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->buffer = apr_palloc(conn->p, BUFFER_SIZE); 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); #if APR_HAS_THREADS free(conn); #endif } else { apr_pool_cleanup_register(np, conn, conn_clean, apr_pool_cleanup_null); *conn_ = conn; } return rv; } #if APR_HAS_THREADS 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_; if (conn->p) { apr_pool_destroy(conn->p); } free(conn); /* free non-pool space */ return APR_SUCCESS; } #endif APU_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; } APU_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, }; APU_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; } APU_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); } APU_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 get_server_line(apr_memcache_conn_t *conn) { apr_size_t bsize = BUFFER_SIZE; apr_status_t rv = APR_SUCCESS; rv = apr_brigade_split_line(conn->tb, conn->bb, APR_BLOCK_READ, BUFFER_SIZE); if (rv != APR_SUCCESS) { return rv; } rv = apr_brigade_flatten(conn->tb, conn->buffer, &bsize); if (rv != APR_SUCCESS) { return rv; } conn->blen = bsize; conn->buffer[bsize] = '\0'; return apr_brigade_cleanup(conn->tb); } static apr_status_t storage_cmd_write(apr_memcache_t *mc, char *cmd, const apr_size_t cmd_size, const char *key, char *data, const apr_size_t data_size, apr_uint32_t timeout, apr_uint16_t flags) { 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]; apr_size_t 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; } /* <command name> <key> <flags> <exptime> <bytes>\r\n<data>\r\n */ vec[0].iov_base = cmd; vec[0].iov_len = cmd_size; vec[1].iov_base = (void*)key; vec[1].iov_len = key_size; klen = apr_snprintf(conn->buffer, BUFFER_SIZE, " %u %u %" APR_SIZE_T_FMT " " MC_EOL, flags, timeout, data_size); vec[2].iov_base = conn->buffer; vec[2].iov_len = klen; vec[3].iov_base = data; vec[3].iov_len = data_size; vec[4].iov_base = MC_EOL; vec[4].iov_len = MC_EOL_LEN; 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_line(conn); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } if (strcmp(conn->buffer, MS_STORED MC_EOL) == 0) { rv = APR_SUCCESS; } else if (strcmp(conn->buffer, MS_NOT_STORED MC_EOL) == 0) { rv = APR_EEXIST; } else { rv = APR_EGENERAL; } ms_release_conn(ms, conn); return rv; } APU_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, MC_SET, MC_SET_LEN, key, data, data_size, timeout, flags); } APU_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, MC_ADD, MC_ADD_LEN, key, data, data_size, timeout, flags); } APU_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, MC_REPLACE, MC_REPLACE_LEN, key, data, data_size, timeout, flags); } APU_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_uint16_t *flags_) { apr_status_t rv; apr_memcache_server_t *ms; apr_memcache_conn_t *conn; apr_uint32_t hash; apr_size_t written; apr_size_t klen = strlen(key); struct iovec vec[3]; 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; } /* get <key>[ <key>[...]]\r\n */ vec[0].iov_base = MC_GET; vec[0].iov_len = MC_GET_LEN; vec[1].iov_base = (void*)key; vec[1].iov_len = klen; vec[2].iov_base = MC_EOL; vec[2].iov_len = MC_EOL_LEN; 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_line(conn); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } if (strncmp(MS_VALUE, conn->buffer, MS_VALUE_LEN) == 0) { char *flags; char *length; char *start; char *last; apr_size_t len = 0; start = conn->buffer; flags = apr_strtok(conn->buffer, " ", &last); flags = apr_strtok(NULL, " ", &last); flags = apr_strtok(NULL, " ", &last); if (flags_) { *flags_ = atoi(flags); } length = apr_strtok(NULL, " ", &last); if (length) { len = atoi(length); } if (len < 0) { *new_length = 0; *baton = NULL; } else { apr_bucket_brigade *bbb; apr_bucket *e; /* eat the trailing \r\n */ rv = apr_brigade_partition(conn->bb, len+2, &e); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } bbb = apr_brigade_split(conn->bb, e); rv = apr_brigade_pflatten(conn->bb, baton, &len, p); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } rv = apr_brigade_destroy(conn->bb); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } conn->bb = bbb; *new_length = len - 2; (*baton)[*new_length] = '\0'; } rv = get_server_line(conn); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } if (strncmp(MS_END, conn->buffer, MS_END_LEN) != 0) { rv = APR_EGENERAL; } } else if (strncmp(MS_END, conn->buffer, MS_END_LEN) == 0) { rv = APR_NOTFOUND; } else { rv = APR_EGENERAL; } ms_release_conn(ms, conn); return rv; } APU_DECLARE(apr_status_t) apr_memcache_delete(apr_memcache_t *mc, const char *key, apr_uint32_t timeout) { 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]; apr_size_t 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; } /* delete <key> <time>\r\n */ vec[0].iov_base = MC_DELETE; vec[0].iov_len = MC_DELETE_LEN; vec[1].iov_base = (void*)key; vec[1].iov_len = klen; klen = apr_snprintf(conn->buffer, BUFFER_SIZE, " %u" MC_EOL, timeout); vec[2].iov_base = conn->buffer; 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_line(conn); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } if (strncmp(MS_DELETED, conn->buffer, MS_DELETED_LEN) == 0) { rv = APR_SUCCESS; } else if (strncmp(MS_NOT_FOUND, conn->buffer, MS_NOT_FOUND_LEN) == 0) { rv = APR_NOTFOUND; } else { rv = APR_EGENERAL; } ms_release_conn(ms, conn); return rv; } static apr_status_t num_cmd_write(apr_memcache_t *mc, char *cmd, const apr_uint32_t cmd_size, const char *key, const apr_int32_t inc, apr_uint32_t *new_value) { 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]; apr_size_t 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; } /* <cmd> <key> <value>\r\n */ vec[0].iov_base = cmd; vec[0].iov_len = cmd_size; vec[1].iov_base = (void*)key; vec[1].iov_len = klen; klen = apr_snprintf(conn->buffer, BUFFER_SIZE, " %u" MC_EOL, inc); vec[2].iov_base = conn->buffer; 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_line(conn); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); return rv; } if (strncmp(MS_ERROR, conn->buffer, MS_ERROR_LEN) == 0) { rv = APR_EGENERAL; } else if (strncmp(MS_NOT_FOUND, conn->buffer, MS_NOT_FOUND_LEN) == 0) { rv = APR_NOTFOUND; } else { if (new_value) { *new_value = atoi(conn->buffer); } rv = APR_SUCCESS; } ms_release_conn(ms, conn); return rv; } APU_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, MC_INCR, MC_INCR_LEN, key, inc, new_value); } APU_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, MC_DECR, MC_DECR_LEN, key, inc, new_value); } APU_DECLARE(apr_status_t) apr_memcache_version(apr_memcache_server_t *ms, apr_pool_t *p, char **baton) { apr_status_t rv; apr_memcache_conn_t *conn; apr_size_t written; struct iovec vec[2]; rv = ms_find_conn(ms, &conn); if (rv != APR_SUCCESS) { return rv; } /* version\r\n */ vec[0].iov_base = MC_VERSION; vec[0].iov_len = MC_VERSION_LEN; vec[1].iov_base = MC_EOL; vec[1].iov_len = MC_EOL_LEN; rv = apr_socket_sendv(conn->sock, vec, 2, &written); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); return rv; } rv = get_server_line(conn); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); return rv; } if (strncmp(MS_VERSION, conn->buffer, MS_VERSION_LEN) == 0) { *baton = apr_pstrmemdup(p, conn->buffer+MS_VERSION_LEN+1, conn->blen - MS_VERSION_LEN - 2); rv = APR_SUCCESS; } else { rv = APR_EGENERAL; } ms_release_conn(ms, conn); return rv; } apr_status_t mc_version_ping(apr_memcache_server_t *ms) { apr_status_t rv; apr_size_t written; struct iovec vec[2]; apr_memcache_conn_t *conn; rv = ms_find_conn(ms, &conn); if (rv != APR_SUCCESS) { return rv; } /* version\r\n */ vec[0].iov_base = MC_VERSION; vec[0].iov_len = MC_VERSION_LEN; vec[1].iov_base = MC_EOL; vec[1].iov_len = MC_EOL_LEN; rv = apr_socket_sendv(conn->sock, vec, 2, &written); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); return rv; } rv = get_server_line(conn); ms_release_conn(ms, conn); return rv; } APU_DECLARE(void) apr_memcache_add_multget_key(apr_pool_t *data_pool, const char* key, apr_hash_t **values) { apr_memcache_value_t* value; apr_size_t 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); } static void mget_conn_result(int up, apr_status_t rv, apr_memcache_t *mc, apr_memcache_server_t *ms, apr_memcache_conn_t *conn, struct cache_server_query_t *server_query, apr_hash_t *values, apr_hash_t *server_queries) { apr_int32_t j; apr_memcache_value_t* value; if (!up) { ms_bad_conn(ms, conn); apr_memcache_disable_server(mc, ms); } for (j = 1; j < server_query->query_vec_count ; j+=2) { if (server_query->query_vec[j].iov_base) { value = apr_hash_get(values, server_query->query_vec[j].iov_base, strlen(server_query->query_vec[j].iov_base)); if (value->status == APR_NOTFOUND) { value->status = rv; } } } ms_release_conn(ms, conn); apr_hash_set(server_queries, &ms, sizeof(ms), NULL); } APU_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) { apr_status_t rv; apr_memcache_server_t* ms; apr_memcache_conn_t* conn; apr_uint32_t hash; apr_size_t written; apr_size_t klen; apr_memcache_value_t* value; apr_hash_index_t* value_hash_index; /* this is a little over aggresive, but beats multiple loops * to figure out how long each vector needs to be per-server. */ apr_int32_t veclen = 2 + 2 * apr_hash_count(values) - 1; /* get <key>[<space><key>...]\r\n */ apr_int32_t i, j; apr_int32_t queries_sent; apr_int32_t queries_recvd; apr_hash_t * server_queries = apr_hash_make(temp_pool); struct cache_server_query_t* server_query; apr_hash_index_t * query_hash_index; apr_pollset_t* pollset; const apr_pollfd_t* activefds; apr_pollfd_t* pollfds; /* build all the queries */ value_hash_index = apr_hash_first(temp_pool, values); while (value_hash_index) { void *v; apr_hash_this(value_hash_index, NULL, NULL, &v); value = v; value_hash_index = apr_hash_next(value_hash_index); klen = strlen(value->key); hash = apr_memcache_hash(mc, value->key, klen); ms = apr_memcache_find_server_hash(mc, hash); if (ms == NULL) { continue; } server_query = apr_hash_get(server_queries, &ms, sizeof(ms)); if (!server_query) { rv = ms_find_conn(ms, &conn); if (rv != APR_SUCCESS) { apr_memcache_disable_server(mc, ms); value->status = rv; continue; } server_query = apr_pcalloc(temp_pool,sizeof(struct cache_server_query_t)); apr_hash_set(server_queries, &ms, sizeof(ms), server_query); server_query->ms = ms; server_query->conn = conn; server_query->query_vec = apr_pcalloc(temp_pool, sizeof(struct iovec)*veclen); /* set up the first key */ server_query->query_vec[0].iov_base = MC_GET; server_query->query_vec[0].iov_len = MC_GET_LEN; server_query->query_vec[1].iov_base = (void*)(value->key); server_query->query_vec[1].iov_len = klen; server_query->query_vec[2].iov_base = MC_EOL; server_query->query_vec[2].iov_len = MC_EOL_LEN; server_query->query_vec_count = 3; } else { j = server_query->query_vec_count - 1; server_query->query_vec[j].iov_base = MC_WS; server_query->query_vec[j].iov_len = MC_WS_LEN; j++; server_query->query_vec[j].iov_base = (void*)(value->key); server_query->query_vec[j].iov_len = klen; j++; server_query->query_vec[j].iov_base = MC_EOL; server_query->query_vec[j].iov_len = MC_EOL_LEN; j++; server_query->query_vec_count = j; } } /* create polling structures */ pollfds = apr_pcalloc(temp_pool, apr_hash_count(server_queries) * sizeof(apr_pollfd_t)); rv = apr_pollset_create(&pollset, apr_hash_count(server_queries), temp_pool, 0); if (rv != APR_SUCCESS) { return rv; } /* send all the queries */ queries_sent = 0; query_hash_index = apr_hash_first(temp_pool, server_queries); while (query_hash_index) { void *v; apr_hash_this(query_hash_index, NULL, NULL, &v); server_query = v; query_hash_index = apr_hash_next(query_hash_index); conn = server_query->conn; ms = server_query->ms; for (i = 0, rv = APR_SUCCESS; i < veclen && rv == APR_SUCCESS; i += APR_MAX_IOVEC_SIZE) { rv = apr_socket_sendv(conn->sock, &(server_query->query_vec[i]), veclen-i>APR_MAX_IOVEC_SIZE ? APR_MAX_IOVEC_SIZE : veclen-i , &written); } if (rv != APR_SUCCESS) { mget_conn_result(FALSE, rv, mc, ms, conn, server_query, values, server_queries); continue; } pollfds[queries_sent].desc_type = APR_POLL_SOCKET; pollfds[queries_sent].reqevents = APR_POLLIN; pollfds[queries_sent].p = temp_pool; pollfds[queries_sent].desc.s = conn->sock; pollfds[queries_sent].client_data = (void *)server_query; apr_pollset_add (pollset, &pollfds[queries_sent]); queries_sent++; } while (queries_sent) { rv = apr_pollset_poll(pollset, MULT_GET_TIMEOUT, &queries_recvd, &activefds); if (rv != APR_SUCCESS) { /* timeout */ queries_sent = 0; continue; } for (i = 0; i < queries_recvd; i++) { server_query = activefds[i].client_data; conn = server_query->conn; ms = server_query->ms; rv = get_server_line(conn); if (rv != APR_SUCCESS) { apr_pollset_remove (pollset, &activefds[i]); mget_conn_result(FALSE, rv, mc, ms, conn, server_query, values, server_queries); queries_sent--; continue; } if (strncmp(MS_VALUE, conn->buffer, MS_VALUE_LEN) == 0) { char *key; char *flags; char *length; char *start; char *last; char *data; apr_size_t len = 0; start = conn->buffer; key = apr_strtok(conn->buffer, " ", &last); /* just the VALUE, ignore */ key = apr_strtok(NULL, " ", &last); flags = apr_strtok(NULL, " ", &last); length = apr_strtok(NULL, " ", &last); if (length) { len = atoi(length); } value = apr_hash_get(values, key, strlen(key)); if (value) { if (len > 0) { apr_bucket_brigade *bbb; apr_bucket *e; /* eat the trailing \r\n */ rv = apr_brigade_partition(conn->bb, len+2, &e); if (rv != APR_SUCCESS) { apr_pollset_remove (pollset, &activefds[i]); mget_conn_result(FALSE, rv, mc, ms, conn, server_query, values, server_queries); queries_sent--; continue; } bbb = apr_brigade_split(conn->bb, e); rv = apr_brigade_pflatten(conn->bb, &data, &len, data_pool); if (rv != APR_SUCCESS) { apr_pollset_remove (pollset, &activefds[i]); mget_conn_result(FALSE, rv, mc, ms, conn, server_query, values, server_queries); queries_sent--; continue; } rv = apr_brigade_destroy(conn->bb); if (rv != APR_SUCCESS) { apr_pollset_remove (pollset, &activefds[i]); mget_conn_result(FALSE, rv, mc, ms, conn, server_query, values, server_queries); queries_sent--; continue; } conn->bb = bbb; value->len = len - 2; data[value->len] = '\0'; value->data = data; } value->status = rv; value->flags = atoi(flags); /* stay on the server */ i--; } else { /* TODO: Server Sent back a key I didn't ask for or my * hash is corrupt */ } } else if (strncmp(MS_END, conn->buffer, MS_END_LEN) == 0) { /* this connection is done */ apr_pollset_remove (pollset, &activefds[i]); ms_release_conn(ms, conn); apr_hash_set(server_queries, &ms, sizeof(ms), NULL); queries_sent--; } else { /* unknown reply? */ rv = APR_EGENERAL; } } /* /for */ } /* /while */ query_hash_index = apr_hash_first(temp_pool, server_queries); while (query_hash_index) { void *v; apr_hash_this(query_hash_index, NULL, NULL, &v); server_query = v; query_hash_index = apr_hash_next(query_hash_index); conn = server_query->conn; ms = server_query->ms; mget_conn_result(TRUE, rv, mc, ms, conn, server_query, values, server_queries); continue; } apr_pool_clear(temp_pool); apr_pollset_destroy(pollset); return APR_SUCCESS; } /** * Define all of the strings for stats */ #define STAT_pid MS_STAT " pid " #define STAT_pid_LEN (sizeof(STAT_pid)-1) #define STAT_uptime MS_STAT " uptime " #define STAT_uptime_LEN (sizeof(STAT_uptime)-1) #define STAT_time MS_STAT " time " #define STAT_time_LEN (sizeof(STAT_time)-1) #define STAT_version MS_STAT " version " #define STAT_version_LEN (sizeof(STAT_version)-1) #define STAT_pointer_size MS_STAT " pointer_size " #define STAT_pointer_size_LEN (sizeof(STAT_pointer_size)-1) #define STAT_rusage_user MS_STAT " rusage_user " #define STAT_rusage_user_LEN (sizeof(STAT_rusage_user)-1) #define STAT_rusage_system MS_STAT " rusage_system " #define STAT_rusage_system_LEN (sizeof(STAT_rusage_system)-1) #define STAT_curr_items MS_STAT " curr_items " #define STAT_curr_items_LEN (sizeof(STAT_curr_items)-1) #define STAT_total_items MS_STAT " total_items " #define STAT_total_items_LEN (sizeof(STAT_total_items)-1) #define STAT_bytes MS_STAT " bytes " #define STAT_bytes_LEN (sizeof(STAT_bytes)-1) #define STAT_curr_connections MS_STAT " curr_connections " #define STAT_curr_connections_LEN (sizeof(STAT_curr_connections)-1) #define STAT_total_connections MS_STAT " total_connections " #define STAT_total_connections_LEN (sizeof(STAT_total_connections)-1) #define STAT_connection_structures MS_STAT " connection_structures " #define STAT_connection_structures_LEN (sizeof(STAT_connection_structures)-1) #define STAT_cmd_get MS_STAT " cmd_get " #define STAT_cmd_get_LEN (sizeof(STAT_cmd_get)-1) #define STAT_cmd_set MS_STAT " cmd_set " #define STAT_cmd_set_LEN (sizeof(STAT_cmd_set)-1) #define STAT_get_hits MS_STAT " get_hits " #define STAT_get_hits_LEN (sizeof(STAT_get_hits)-1) #define STAT_get_misses MS_STAT " get_misses " #define STAT_get_misses_LEN (sizeof(STAT_get_misses)-1) #define STAT_evictions MS_STAT " evictions " #define STAT_evictions_LEN (sizeof(STAT_evictions)-1) #define STAT_bytes_read MS_STAT " bytes_read " #define STAT_bytes_read_LEN (sizeof(STAT_bytes_read)-1) #define STAT_bytes_written MS_STAT " bytes_written " #define STAT_bytes_written_LEN (sizeof(STAT_bytes_written)-1) #define STAT_limit_maxbytes MS_STAT " limit_maxbytes " #define STAT_limit_maxbytes_LEN (sizeof(STAT_limit_maxbytes)-1) #define STAT_threads MS_STAT " threads " #define STAT_threads_LEN (sizeof(STAT_threads)-1) static const char *stat_read_string(apr_pool_t *p, char *buf, apr_size_t len) { /* remove trailing \r\n and null char */ return apr_pstrmemdup(p, buf, len-2); } static apr_uint32_t stat_read_uint32(apr_pool_t *p, char *buf, apr_size_t len) { buf[len-2] = '\0'; return atoi(buf); } static apr_uint64_t stat_read_uint64(apr_pool_t *p, char *buf, apr_size_t len) { buf[len-2] = '\0'; return apr_atoi64(buf); } static apr_time_t stat_read_time(apr_pool_t *p, char *buf, apr_size_t len) { buf[len-2] = '\0'; return apr_time_from_sec(atoi(buf)); } static apr_time_t stat_read_rtime(apr_pool_t *p, char *buf, apr_size_t len) { char *tok; char *secs; char *usecs; const char *sep = ":."; buf[len-2] = '\0'; secs = apr_strtok(buf, sep, &tok); usecs = apr_strtok(NULL, sep, &tok); if (secs && usecs) { return apr_time_make(atoi(secs), atoi(usecs)); } else { return apr_time_make(0, 0); } } /** * I got tired of Typing. Meh. * * TODO: Convert it to static tables to make it cooler. */ #define mc_stat_cmp(name) \ strncmp(STAT_ ## name, conn->buffer, STAT_ ## name ## _LEN) == 0 #define mc_stat_str(name) \ stat_read_string(p, conn->buffer + name, \ conn->blen - name) #define mc_stat_uint32(name) \ stat_read_uint32(p, conn->buffer + name, \ conn->blen - name) #define mc_stat_uint64(name) \ stat_read_uint64(p, conn->buffer + name, \ conn->blen - name) #define mc_stat_time(name) \ stat_read_time(p, conn->buffer + name, \ conn->blen - name) #define mc_stat_rtime(name) \ stat_read_rtime(p, conn->buffer + name, \ conn->blen - name) #define mc_do_stat(name, type) \ if (mc_stat_cmp(name)) { \ stats-> name = mc_stat_ ## type ((STAT_ ## name ## _LEN)); \ } static void update_stats(apr_pool_t *p, apr_memcache_conn_t *conn, apr_memcache_stats_t *stats) { mc_do_stat(version, str) else mc_do_stat(pid, uint32) else mc_do_stat(uptime, uint32) else mc_do_stat(pointer_size, uint32) else mc_do_stat(time, time) else mc_do_stat(rusage_user, rtime) else mc_do_stat(rusage_system, rtime) else mc_do_stat(curr_items, uint32) else mc_do_stat(total_items, uint32) else mc_do_stat(bytes, uint64) else mc_do_stat(curr_connections, uint32) else mc_do_stat(total_connections, uint32) else mc_do_stat(connection_structures, uint32) else mc_do_stat(cmd_get, uint32) else mc_do_stat(cmd_set, uint32) else mc_do_stat(get_hits, uint32) else mc_do_stat(get_misses, uint32) else mc_do_stat(evictions, uint64) else mc_do_stat(bytes_read, uint64) else mc_do_stat(bytes_written, uint64) else mc_do_stat(limit_maxbytes, uint32) else mc_do_stat(threads, uint32) } APU_DECLARE(apr_status_t) apr_memcache_stats(apr_memcache_server_t *ms, apr_pool_t *p, apr_memcache_stats_t **stats) { apr_memcache_stats_t *ret; apr_status_t rv; apr_memcache_conn_t *conn; apr_size_t written; struct iovec vec[2]; rv = ms_find_conn(ms, &conn); if (rv != APR_SUCCESS) { return rv; } /* version\r\n */ vec[0].iov_base = MC_STATS; vec[0].iov_len = MC_STATS_LEN; vec[1].iov_base = MC_EOL; vec[1].iov_len = MC_EOL_LEN; rv = apr_socket_sendv(conn->sock, vec, 2, &written); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); return rv; } ret = apr_pcalloc(p, sizeof(apr_memcache_stats_t)); do { rv = get_server_line(conn); if (rv != APR_SUCCESS) { ms_bad_conn(ms, conn); return rv; } if (strncmp(MS_END, conn->buffer, MS_END_LEN) == 0) { rv = APR_SUCCESS; break; } else if (strncmp(MS_STAT, conn->buffer, MS_STAT_LEN) == 0) { update_stats(p, conn, ret); continue; } else { rv = APR_EGENERAL; break; } } while(1); ms_release_conn(ms, conn); if (stats) { *stats = ret; } return rv; }
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