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freebsd/contrib/apr-util/memcache/apr_memcache.c
Peter Wemm a5b9d9b723 Import apr-util-1.5.3 from vendor branch (rr258600) 
This is a minor bug fix release.
2013-11-25 22:20:34 +00:00

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/* 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);
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);
}
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) {
len = strtol(length, (char **)NULL, 10);
}
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 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;
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 = strtol(length, (char **) NULL, 10);
}
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, 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, 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, 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 == 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;
}
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