diff options
Diffstat (limited to 'memcache/apr_memcache.c')
| -rw-r--r-- | memcache/apr_memcache.c | 1724 |
1 files changed, 1724 insertions, 0 deletions
diff --git a/memcache/apr_memcache.c b/memcache/apr_memcache.c new file mode 100644 index 0000000..ae41b2e --- /dev/null +++ b/memcache/apr_memcache.c @@ -0,0 +1,1724 @@ +/* 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_pool_t *tp; + apr_socket_t *sock; + 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 dead server, every 5 seconds */ + if (curtime - ms->btime > apr_time_from_sec(5)) { + ms->btime = curtime; + if (mc_version_ping(ms) == APR_SUCCESS) { + 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) +{ + apr_status_t rv; + apr_bucket_alloc_t *balloc; + apr_bucket *e; + +#if APR_HAS_THREADS + rv = apr_reslist_acquire(ms->conns, (void **)conn); +#else + *conn = ms->conn; + rv = APR_SUCCESS; +#endif + + if (rv != APR_SUCCESS) { + return rv; + } + + balloc = apr_bucket_alloc_create((*conn)->tp); + (*conn)->bb = apr_brigade_create((*conn)->tp, balloc); + (*conn)->tb = apr_brigade_create((*conn)->tp, balloc); + + e = apr_bucket_socket_create((*conn)->sock, balloc); + APR_BRIGADE_INSERT_TAIL((*conn)->bb, e); + + return rv; +} + +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) +{ + apr_pool_clear(conn->tp); +#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; +#if APR_HAVE_SOCKADDR_UN + apr_int32_t family = conn->ms->host[0] != '/' ? APR_INET : APR_UNIX; +#else + apr_int32_t family = APR_INET; +#endif + + rv = apr_sockaddr_info_get(&sa, conn->ms->host, family, 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_pool_t *np; + apr_pool_t *tp; + apr_memcache_server_t *ms = params; +#if APR_HAVE_SOCKADDR_UN + apr_int32_t family = ms->host[0] != '/' ? APR_INET : APR_UNIX; +#else + apr_int32_t family = APR_INET; +#endif + + rv = apr_pool_create(&np, pool); + if (rv != APR_SUCCESS) { + return rv; + } + + rv = apr_pool_create(&tp, np); + if (rv != APR_SUCCESS) { + apr_pool_destroy(np); + return rv; + } + + conn = apr_palloc(np, sizeof( apr_memcache_conn_t )); + + conn->p = np; + conn->tp = tp; + + rv = apr_socket_create(&conn->sock, family, SOCK_STREAM, 0, np); + + if (rv != APR_SUCCESS) { + apr_pool_destroy(np); + return rv; + } + + conn->buffer = apr_palloc(conn->p, BUFFER_SIZE + 1); + conn->blen = 0; + conn->ms = ms; + + rv = conn_connect(conn); + if (rv != APR_SUCCESS) { + apr_pool_destroy(np); + } + else { + *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_; + 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); + + apr_pool_destroy(conn->p); + + 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); + if (rv != APR_SUCCESS) { + return rv; + } + + apr_reslist_cleanup_order_set(server->conns, APR_RESLIST_CLEANUP_FIRST); +#else + rv = mc_conn_construct((void**)&(server->conn), server, np); + if (rv != APR_SUCCESS) { + return rv; + } +#endif + + *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); + +} + +/* + * Parses a decimal size from size_str, returning the value in *size. + * Returns 1 if parsing was successful, 0 if parsing failed. + */ +static int parse_size(const char *size_str, apr_size_t *size) +{ + char *endptr; + long size_as_long; + + errno = 0; + size_as_long = strtol(size_str, &endptr, 10); + if ((size_as_long < 0) || (errno != 0) || (endptr == size_str) || + (endptr[0] != ' ' && (endptr[0] != '\r' || endptr[1] != '\n'))) { + return 0; + } + + *size = (unsigned long)size_as_long; + return 1; +} + +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 *last; + apr_size_t len = 0; + + 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 || !parse_size(length, &len)) { + ms_bad_conn(ms, conn); + apr_memcache_disable_server(mc, ms); + return APR_EGENERAL; + } + 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); + return rv; + } + + rv = apr_brigade_destroy(conn->bb); + if (rv != APR_SUCCESS) { + ms_bad_conn(ms, conn); + 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) { + ms_bad_conn(ms, conn); + apr_memcache_disable_server(mc, ms); + return APR_EGENERAL; + } + } + else if (strncmp(MS_END, conn->buffer, MS_END_LEN) == 0) { + rv = APR_NOTFOUND; + } + else { + ms_bad_conn(ms, conn); + apr_memcache_disable_server(mc, ms); + return 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 serverup, + int connup, + 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; + + apr_hash_set(server_queries, &ms, sizeof(ms), NULL); + + if (connup) { + ms_release_conn(ms, conn); + } else { + ms_bad_conn(ms, conn); + + if (!serverup) { + 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; + } + } + } +} + +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) { + 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); + + mget_conn_result(TRUE, TRUE, rv, mc, server_query->ms, server_query->conn, + server_query, values, server_queries); + } + + 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, 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, 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 *last; + char *data; + apr_size_t len = 0; + apr_bucket *e = NULL; + + 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 || !parse_size(length, &len)) { + rv = APR_EGENERAL; + } + else { + /* 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(TRUE, FALSE, rv, mc, ms, conn, + server_query, values, server_queries); + queries_sent--; + continue; + } + + value = apr_hash_get(values, key, strlen(key)); + if (value) { + apr_bucket_brigade *bbb; + + 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(TRUE, 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(TRUE, 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 { + /* Server Sent back a key I didn't ask for or my + * hash is corrupt */ + rv = APR_EGENERAL; + } + } + 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; + } + if (rv != APR_SUCCESS) { + apr_pollset_remove (pollset, &activefds[i]); + mget_conn_result(TRUE, FALSE, rv, mc, ms, conn, + server_query, values, server_queries); + queries_sent--; + } + } /* /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 == APR_SUCCESS), rv, mc, ms, conn, + server_query, values, server_queries); + continue; + } + + apr_pollset_destroy(pollset); + apr_pool_clear(temp_pool); + 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; +} + |