| /* 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. |
| */ |
| |
| /* Overview of what this is and does: |
| * http://www.apache.org/~niq/dbd.html |
| * or |
| * http://apache.webthing.com/database/ |
| */ |
| |
| #include "apr_reslist.h" |
| #include "apr_strings.h" |
| #include "apr_hash.h" |
| #include "apr_tables.h" |
| #include "apr_lib.h" |
| #include "apr_dbd.h" |
| |
| #define APR_WANT_MEMFUNC |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #include "http_protocol.h" |
| #include "http_config.h" |
| #include "http_log.h" |
| #include "http_request.h" |
| #include "mod_dbd.h" |
| |
| extern module AP_MODULE_DECLARE_DATA dbd_module; |
| |
| APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(dbd, DBD, apr_status_t, post_connect, |
| (apr_pool_t *pool, dbd_cfg_t *cfg, |
| ap_dbd_t *dbd), |
| (pool, cfg, dbd), OK, DECLINED) |
| |
| /************ svr cfg: manage db connection pool ****************/ |
| |
| #define NMIN_SET 0x1 |
| #define NKEEP_SET 0x2 |
| #define NMAX_SET 0x4 |
| #define EXPTIME_SET 0x8 |
| |
| typedef struct dbd_group_t dbd_group_t; |
| |
| struct dbd_group_t { |
| dbd_cfg_t *cfg; |
| dbd_group_t *next; |
| apr_pool_t *pool; |
| #if APR_HAS_THREADS |
| apr_thread_mutex_t *mutex; |
| apr_reslist_t *reslist; |
| int destroyed; |
| #else |
| ap_dbd_t *rec; |
| #endif |
| }; |
| |
| typedef struct { |
| dbd_cfg_t *cfg; |
| dbd_group_t *group; |
| } svr_cfg; |
| |
| typedef enum { cmd_name, cmd_params, cmd_persist, |
| cmd_min, cmd_keep, cmd_max, cmd_exp |
| } cmd_parts; |
| |
| static apr_pool_t *config_pool; |
| static dbd_group_t *group_list; |
| |
| /* a default DBDriver value that'll generate meaningful error messages */ |
| static const char *const no_dbdriver = "[DBDriver unset]"; |
| |
| /* A default nmin of >0 will help with generating meaningful |
| * startup error messages if the database is down. |
| */ |
| #define DEFAULT_NMIN 1 |
| #define DEFAULT_NKEEP 2 |
| #define DEFAULT_NMAX 10 |
| #define DEFAULT_EXPTIME 300 |
| |
| #define DEFAULT_SQL_INIT_ARRAY_SIZE 5 |
| |
| static void *create_dbd_config(apr_pool_t *pool, server_rec *s) |
| { |
| svr_cfg *svr = apr_pcalloc(pool, sizeof(svr_cfg)); |
| dbd_cfg_t *cfg = svr->cfg = apr_pcalloc(pool, sizeof(dbd_cfg_t)); |
| |
| cfg->server = s; |
| cfg->name = no_dbdriver; /* to generate meaningful error messages */ |
| cfg->params = ""; /* don't risk segfault on misconfiguration */ |
| cfg->persist = -1; |
| #if APR_HAS_THREADS |
| cfg->nmin = DEFAULT_NMIN; |
| cfg->nkeep = DEFAULT_NKEEP; |
| cfg->nmax = DEFAULT_NMAX; |
| cfg->exptime = DEFAULT_EXPTIME; |
| #endif |
| cfg->queries = apr_hash_make(pool); |
| cfg->init_queries = apr_array_make(pool, DEFAULT_SQL_INIT_ARRAY_SIZE, |
| sizeof(const char *)); |
| |
| return svr; |
| } |
| |
| static void *merge_dbd_config(apr_pool_t *pool, void *basev, void *addv) |
| { |
| dbd_cfg_t *base = ((svr_cfg*) basev)->cfg; |
| dbd_cfg_t *add = ((svr_cfg*) addv)->cfg; |
| svr_cfg *svr = apr_pcalloc(pool, sizeof(svr_cfg)); |
| dbd_cfg_t *new = svr->cfg = apr_pcalloc(pool, sizeof(dbd_cfg_t)); |
| |
| new->server = add->server; |
| new->name = (add->name != no_dbdriver) ? add->name : base->name; |
| new->params = strcmp(add->params, "") ? add->params : base->params; |
| new->persist = (add->persist != -1) ? add->persist : base->persist; |
| #if APR_HAS_THREADS |
| new->nmin = (add->set&NMIN_SET) ? add->nmin : base->nmin; |
| new->nkeep = (add->set&NKEEP_SET) ? add->nkeep : base->nkeep; |
| new->nmax = (add->set&NMAX_SET) ? add->nmax : base->nmax; |
| new->exptime = (add->set&EXPTIME_SET) ? add->exptime : base->exptime; |
| #endif |
| new->queries = apr_hash_overlay(pool, add->queries, base->queries); |
| new->init_queries = apr_array_append(pool, add->init_queries, |
| base->init_queries); |
| |
| return svr; |
| } |
| |
| static void ap_dbd_sql_init(server_rec *s, const char *query) |
| { |
| svr_cfg *svr; |
| const char **arr_item; |
| |
| svr = ap_get_module_config(s->module_config, &dbd_module); |
| if (!svr) { |
| /* some modules may call from within config directive handlers, and |
| * if these are called in a server context that contains no mod_dbd |
| * config directives, then we have to create our own server config |
| */ |
| svr = create_dbd_config(config_pool, s); |
| ap_set_module_config(s->module_config, &dbd_module, svr); |
| } |
| |
| if (query) { |
| arr_item = apr_array_push(svr->cfg->init_queries); |
| *arr_item = query; |
| } |
| } |
| |
| static const char *dbd_param(cmd_parms *cmd, void *dconf, const char *val) |
| { |
| apr_status_t rv; |
| const apr_dbd_driver_t *driver = NULL; |
| svr_cfg *svr = ap_get_module_config(cmd->server->module_config, |
| &dbd_module); |
| dbd_cfg_t *cfg = svr->cfg; |
| |
| switch ((long) cmd->info) { |
| case cmd_name: |
| cfg->name = val; |
| /* loading the driver involves once-only dlloading that is |
| * best done at server startup. This also guarantees that |
| * we won't return an error later. |
| */ |
| rv = apr_dbd_get_driver(cmd->pool, cfg->name, &driver); |
| if (APR_STATUS_IS_ENOTIMPL(rv)) { |
| return apr_psprintf(cmd->pool, "No driver for %s", cfg->name); |
| } |
| else if (APR_STATUS_IS_EDSOOPEN(rv)) { |
| return apr_psprintf(cmd->pool, |
| #ifdef NETWARE |
| "Can't load driver file dbd%s.nlm", |
| #else |
| "Can't load driver file apr_dbd_%s.so", |
| #endif |
| cfg->name); |
| } |
| else if (APR_STATUS_IS_ESYMNOTFOUND(rv)) { |
| return apr_psprintf(cmd->pool, |
| "Failed to load driver apr_dbd_%s_driver", |
| cfg->name); |
| } |
| break; |
| case cmd_params: |
| cfg->params = val; |
| break; |
| } |
| |
| return NULL; |
| } |
| |
| #if APR_HAS_THREADS |
| static const char *dbd_param_int(cmd_parms *cmd, void *dconf, const char *val) |
| { |
| svr_cfg *svr = ap_get_module_config(cmd->server->module_config, |
| &dbd_module); |
| dbd_cfg_t *cfg = svr->cfg; |
| const char *p; |
| |
| for (p = val; *p; ++p) { |
| if (!apr_isdigit(*p)) { |
| return "Argument must be numeric!"; |
| } |
| } |
| |
| switch ((long) cmd->info) { |
| case cmd_min: |
| cfg->nmin = atoi(val); |
| cfg->set |= NMIN_SET; |
| break; |
| case cmd_keep: |
| cfg->nkeep = atoi(val); |
| cfg->set |= NKEEP_SET; |
| break; |
| case cmd_max: |
| cfg->nmax = atoi(val); |
| cfg->set |= NMAX_SET; |
| break; |
| case cmd_exp: |
| cfg->exptime = atoi(val); |
| cfg->set |= EXPTIME_SET; |
| break; |
| } |
| |
| return NULL; |
| } |
| #endif |
| |
| static const char *dbd_param_flag(cmd_parms *cmd, void *dconf, int flag) |
| { |
| svr_cfg *svr = ap_get_module_config(cmd->server->module_config, |
| &dbd_module); |
| |
| switch ((long) cmd->info) { |
| case cmd_persist: |
| svr->cfg->persist = flag; |
| break; |
| } |
| |
| return NULL; |
| } |
| |
| static const char *dbd_prepare(cmd_parms *cmd, void *dconf, const char *query, |
| const char *label) |
| { |
| if (!label) { |
| label = query; |
| query = ""; |
| } |
| |
| ap_dbd_prepare(cmd->server, query, label); |
| |
| return NULL; |
| } |
| |
| static const char *dbd_init_sql(cmd_parms *cmd, void *dconf, const char *query) |
| { |
| if (!query || *query == '\n') { |
| return "You should specify SQL statement"; |
| } |
| |
| ap_dbd_sql_init(cmd->server, query); |
| |
| return NULL; |
| } |
| |
| static const command_rec dbd_cmds[] = { |
| AP_INIT_TAKE1("DBDriver", dbd_param, (void*)cmd_name, RSRC_CONF, |
| "SQL Driver"), |
| AP_INIT_TAKE1("DBDParams", dbd_param, (void*)cmd_params, RSRC_CONF, |
| "SQL Driver Params"), |
| AP_INIT_FLAG("DBDPersist", dbd_param_flag, (void*)cmd_persist, RSRC_CONF, |
| "Use persistent connection/pool"), |
| AP_INIT_TAKE12("DBDPrepareSQL", dbd_prepare, NULL, RSRC_CONF, |
| "SQL statement to prepare (or nothing, to override " |
| "statement inherited from main server) and label"), |
| AP_INIT_TAKE1("DBDInitSQL", dbd_init_sql, NULL, RSRC_CONF, |
| "SQL statement to be executed after connection is created"), |
| #if APR_HAS_THREADS |
| AP_INIT_TAKE1("DBDMin", dbd_param_int, (void*)cmd_min, RSRC_CONF, |
| "Minimum number of connections"), |
| /* XXX: note that mod_proxy calls this "smax" */ |
| AP_INIT_TAKE1("DBDKeep", dbd_param_int, (void*)cmd_keep, RSRC_CONF, |
| "Maximum number of sustained connections"), |
| AP_INIT_TAKE1("DBDMax", dbd_param_int, (void*)cmd_max, RSRC_CONF, |
| "Maximum number of connections"), |
| /* XXX: note that mod_proxy calls this "ttl" (time to live) */ |
| AP_INIT_TAKE1("DBDExptime", dbd_param_int, (void*)cmd_exp, RSRC_CONF, |
| "Keepalive time for idle connections"), |
| #endif |
| {NULL} |
| }; |
| |
| static int dbd_pre_config(apr_pool_t *pconf, apr_pool_t *plog, |
| apr_pool_t *ptemp) |
| { |
| config_pool = pconf; |
| group_list = NULL; |
| return OK; |
| } |
| |
| DBD_DECLARE_NONSTD(void) ap_dbd_prepare(server_rec *s, const char *query, |
| const char *label) |
| { |
| svr_cfg *svr; |
| |
| svr = ap_get_module_config(s->module_config, &dbd_module); |
| if (!svr) { |
| /* some modules may call from within config directive handlers, and |
| * if these are called in a server context that contains no mod_dbd |
| * config directives, then we have to create our own server config |
| */ |
| svr = create_dbd_config(config_pool, s); |
| ap_set_module_config(s->module_config, &dbd_module, svr); |
| } |
| |
| if (apr_hash_get(svr->cfg->queries, label, APR_HASH_KEY_STRING) |
| && strcmp(query, "")) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(02653) |
| "conflicting SQL statements with label %s", label); |
| } |
| |
| apr_hash_set(svr->cfg->queries, label, APR_HASH_KEY_STRING, query); |
| } |
| |
| typedef struct { |
| const char *label, *query; |
| } dbd_query_t; |
| |
| static int dbd_post_config(apr_pool_t *pconf, apr_pool_t *plog, |
| apr_pool_t *ptemp, server_rec *s) |
| { |
| server_rec *sp; |
| apr_array_header_t *add_queries = apr_array_make(ptemp, 10, |
| sizeof(dbd_query_t)); |
| |
| for (sp = s; sp; sp = sp->next) { |
| svr_cfg *svr = ap_get_module_config(sp->module_config, &dbd_module); |
| dbd_cfg_t *cfg = svr->cfg; |
| apr_hash_index_t *hi_first = apr_hash_first(ptemp, cfg->queries); |
| dbd_group_t *group; |
| |
| /* dbd_setup in 2.2.3 and under was causing spurious error messages |
| * when dbd isn't configured. We can stop that with a quick check here |
| * together with a similar check in ap_dbd_open (where being |
| * unconfigured is a genuine error that must be reported). |
| */ |
| if (cfg->name == no_dbdriver || !cfg->persist) { |
| continue; |
| } |
| |
| for (group = group_list; group; group = group->next) { |
| dbd_cfg_t *group_cfg = group->cfg; |
| apr_hash_index_t *hi; |
| int group_ok = 1; |
| |
| if (strcmp(cfg->name, group_cfg->name) |
| || strcmp(cfg->params, group_cfg->params)) { |
| continue; |
| } |
| |
| #if APR_HAS_THREADS |
| if (cfg->nmin != group_cfg->nmin |
| || cfg->nkeep != group_cfg->nkeep |
| || cfg->nmax != group_cfg->nmax |
| || cfg->exptime != group_cfg->exptime) { |
| continue; |
| } |
| #endif |
| |
| add_queries->nelts = 0; |
| |
| for (hi = hi_first; hi; hi = apr_hash_next(hi)) { |
| const char *label, *query; |
| const char *group_query; |
| |
| apr_hash_this(hi, (void*) &label, NULL, (void*) &query); |
| |
| group_query = apr_hash_get(group_cfg->queries, label, |
| APR_HASH_KEY_STRING); |
| |
| if (!group_query) { |
| dbd_query_t *add_query = apr_array_push(add_queries); |
| |
| add_query->label = label; |
| add_query->query = query; |
| } |
| else if (strcmp(query, group_query)) { |
| group_ok = 0; |
| break; |
| } |
| } |
| |
| if (group_ok) { |
| int i; |
| |
| for (i = 0; i < add_queries->nelts; ++i) { |
| dbd_query_t *add_query = ((dbd_query_t*) add_queries->elts) |
| + i; |
| |
| apr_hash_set(group_cfg->queries, add_query->label, |
| APR_HASH_KEY_STRING, add_query->query); |
| } |
| |
| svr->group = group; |
| break; |
| } |
| } |
| |
| if (!svr->group) { |
| svr->group = group = apr_pcalloc(pconf, sizeof(dbd_group_t)); |
| |
| group->cfg = cfg; |
| |
| group->next = group_list; |
| group_list = group; |
| } |
| } |
| |
| return OK; |
| } |
| |
| static apr_status_t dbd_prepared_init(apr_pool_t *pool, dbd_cfg_t *cfg, |
| ap_dbd_t *rec) |
| { |
| apr_hash_index_t *hi; |
| |
| rec->prepared = apr_hash_make(pool); |
| |
| for (hi = apr_hash_first(pool, cfg->queries); hi; |
| hi = apr_hash_next(hi)) { |
| const char *label, *query; |
| apr_dbd_prepared_t *stmt; |
| |
| apr_hash_this(hi, (void*) &label, NULL, (void*) &query); |
| |
| if (!strcmp(query, "")) { |
| continue; |
| } |
| |
| stmt = NULL; |
| if (apr_dbd_prepare(rec->driver, pool, rec->handle, query, |
| label, &stmt)) { |
| return APR_EGENERAL; |
| } |
| else { |
| apr_hash_set(rec->prepared, label, APR_HASH_KEY_STRING, stmt); |
| } |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t dbd_init_sql_init(apr_pool_t *pool, dbd_cfg_t *cfg, |
| ap_dbd_t *rec) |
| { |
| int i; |
| apr_status_t rv = APR_SUCCESS; |
| |
| for (i = 0; i < cfg->init_queries->nelts; i++) { |
| int nrows; |
| char **query_p; |
| |
| query_p = (char **)cfg->init_queries->elts + i; |
| |
| if (apr_dbd_query(rec->driver, rec->handle, &nrows, *query_p)) { |
| rv = APR_EGENERAL; |
| break; |
| } |
| } |
| |
| return rv; |
| } |
| |
| static apr_status_t dbd_close(void *data) |
| { |
| ap_dbd_t *rec = data; |
| |
| return apr_dbd_close(rec->driver, rec->handle); |
| } |
| |
| #if APR_HAS_THREADS |
| static apr_status_t dbd_destruct(void *data, void *params, apr_pool_t *pool) |
| { |
| dbd_group_t *group = params; |
| |
| if (!group->destroyed) { |
| ap_dbd_t *rec = data; |
| |
| apr_pool_destroy(rec->pool); |
| } |
| |
| return APR_SUCCESS; |
| } |
| #endif |
| |
| /* an apr_reslist_constructor for SQL connections |
| * Also use this for opening in non-reslist modes, since it gives |
| * us all the error-handling in one place. |
| */ |
| static apr_status_t dbd_construct(void **data_ptr, |
| void *params, apr_pool_t *pool) |
| { |
| dbd_group_t *group = params; |
| dbd_cfg_t *cfg = group->cfg; |
| apr_pool_t *rec_pool, *prepared_pool; |
| ap_dbd_t *rec; |
| apr_status_t rv; |
| const char *err = ""; |
| |
| rv = apr_pool_create(&rec_pool, pool); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, cfg->server, APLOGNO(00624) |
| "Failed to create memory pool"); |
| return rv; |
| } |
| |
| rec = apr_pcalloc(rec_pool, sizeof(ap_dbd_t)); |
| |
| rec->pool = rec_pool; |
| |
| /* The driver is loaded at config time now, so this just checks a hash. |
| * If that changes, the driver DSO could be registered to unload against |
| * our pool, which is probably not what we want. Error checking isn't |
| * necessary now, but in case that changes in the future ... |
| */ |
| rv = apr_dbd_get_driver(rec->pool, cfg->name, &rec->driver); |
| if (rv != APR_SUCCESS) { |
| if (APR_STATUS_IS_ENOTIMPL(rv)) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cfg->server, APLOGNO(00625) |
| "driver for %s not available", cfg->name); |
| } |
| else if (APR_STATUS_IS_EDSOOPEN(rv)) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cfg->server, APLOGNO(00626) |
| "can't find driver for %s", cfg->name); |
| } |
| else if (APR_STATUS_IS_ESYMNOTFOUND(rv)) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cfg->server, APLOGNO(00627) |
| "driver for %s is invalid or corrupted", |
| cfg->name); |
| } |
| else { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cfg->server, APLOGNO(00628) |
| "mod_dbd not compatible with APR in get_driver"); |
| } |
| apr_pool_destroy(rec->pool); |
| return rv; |
| } |
| |
| rv = apr_dbd_open_ex(rec->driver, rec->pool, cfg->params, &rec->handle, &err); |
| if (rv != APR_SUCCESS) { |
| switch (rv) { |
| case APR_EGENERAL: |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cfg->server, APLOGNO(00629) |
| "Can't connect to %s: %s", cfg->name, err); |
| break; |
| default: |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cfg->server, APLOGNO(00630) |
| "mod_dbd not compatible with APR in open"); |
| break; |
| } |
| |
| apr_pool_destroy(rec->pool); |
| return rv; |
| } |
| |
| apr_pool_cleanup_register(rec->pool, rec, dbd_close, |
| apr_pool_cleanup_null); |
| |
| /* we use a sub-pool for the prepared statements for each connection so |
| * that they will be cleaned up first, before the connection is closed |
| */ |
| rv = apr_pool_create(&prepared_pool, rec->pool); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, cfg->server, APLOGNO(00631) |
| "Failed to create memory pool"); |
| |
| apr_pool_destroy(rec->pool); |
| return rv; |
| } |
| |
| rv = dbd_prepared_init(prepared_pool, cfg, rec); |
| if (rv != APR_SUCCESS) { |
| const char *errmsg = apr_dbd_error(rec->driver, rec->handle, rv); |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cfg->server, APLOGNO(00632) |
| "failed to prepare SQL statements: %s", |
| (errmsg ? errmsg : "[???]")); |
| |
| apr_pool_destroy(rec->pool); |
| return rv; |
| } |
| |
| dbd_run_post_connect(prepared_pool, cfg, rec); |
| |
| *data_ptr = rec; |
| |
| return APR_SUCCESS; |
| } |
| |
| #if APR_HAS_THREADS |
| static apr_status_t dbd_destroy(void *data) |
| { |
| dbd_group_t *group = data; |
| |
| group->destroyed = 1; |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t dbd_setup(server_rec *s, dbd_group_t *group) |
| { |
| dbd_cfg_t *cfg = group->cfg; |
| apr_status_t rv; |
| |
| /* We create the reslist using a sub-pool of the pool passed to our |
| * child_init hook. No other threads can be here because we're |
| * either in the child_init phase or dbd_setup_lock() acquired our mutex. |
| * No other threads will use this sub-pool after this, except via |
| * reslist calls, which have an internal mutex. |
| * |
| * We need to short-circuit the cleanup registered internally by |
| * apr_reslist_create(). We do this by registering dbd_destroy() |
| * as a cleanup afterwards, so that it will run before the reslist's |
| * internal cleanup. |
| * |
| * If we didn't do this, then we could free memory twice when the pool |
| * was destroyed. When apr_pool_destroy() runs, it first destroys all |
| * all the per-connection sub-pools created in dbd_construct(), and |
| * then it runs the reslist's cleanup. The cleanup calls dbd_destruct() |
| * on each resource, which would then attempt to destroy the sub-pools |
| * a second time. |
| */ |
| rv = apr_reslist_create(&group->reslist, |
| cfg->nmin, cfg->nkeep, cfg->nmax, |
| apr_time_from_sec(cfg->exptime), |
| dbd_construct, dbd_destruct, group, |
| group->pool); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(00633) |
| "failed to initialise"); |
| return rv; |
| } |
| |
| apr_pool_cleanup_register(group->pool, group, dbd_destroy, |
| apr_pool_cleanup_null); |
| |
| return APR_SUCCESS; |
| } |
| #endif |
| |
| static apr_status_t dbd_setup_init(apr_pool_t *pool, server_rec *s) |
| { |
| dbd_group_t *group; |
| apr_status_t rv = APR_SUCCESS; |
| |
| for (group = group_list; group; group = group->next) { |
| apr_status_t rv2; |
| |
| rv2 = apr_pool_create(&group->pool, pool); |
| if (rv2 != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv2, s, APLOGNO(00634) |
| "Failed to create reslist cleanup memory pool"); |
| return rv2; |
| } |
| |
| #if APR_HAS_THREADS |
| rv2 = dbd_setup(s, group); |
| if (rv2 == APR_SUCCESS) { |
| continue; |
| } |
| else if (rv == APR_SUCCESS) { |
| rv = rv2; |
| } |
| |
| /* we failed, so create a mutex so that subsequent competing callers |
| * to ap_dbd_open can serialize themselves while they retry |
| */ |
| rv2 = apr_thread_mutex_create(&group->mutex, |
| APR_THREAD_MUTEX_DEFAULT, pool); |
| if (rv2 != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv2, s, APLOGNO(00635) |
| "Failed to create thread mutex"); |
| return rv2; |
| } |
| #endif |
| } |
| |
| return rv; |
| } |
| |
| static void dbd_child_init(apr_pool_t *p, server_rec *s) |
| { |
| apr_status_t rv = dbd_setup_init(p, s); |
| if (rv) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(00636) |
| "child init failed!"); |
| } |
| } |
| |
| #if APR_HAS_THREADS |
| static apr_status_t dbd_setup_lock(server_rec *s, dbd_group_t *group) |
| { |
| apr_status_t rv = APR_SUCCESS, rv2; |
| |
| /* several threads could be here at the same time, all trying to |
| * initialize the reslist because dbd_setup_init failed to do so |
| */ |
| if (!group->mutex) { |
| /* we already logged an error when the mutex couldn't be created */ |
| return APR_EGENERAL; |
| } |
| |
| rv2 = apr_thread_mutex_lock(group->mutex); |
| if (rv2 != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv2, s, APLOGNO(00637) |
| "Failed to acquire thread mutex"); |
| return rv2; |
| } |
| |
| if (!group->reslist) { |
| rv = dbd_setup(s, group); |
| } |
| |
| rv2 = apr_thread_mutex_unlock(group->mutex); |
| if (rv2 != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv2, s, APLOGNO(00638) |
| "Failed to release thread mutex"); |
| if (rv == APR_SUCCESS) { |
| rv = rv2; |
| } |
| } |
| |
| return rv; |
| } |
| #endif |
| |
| /* Functions we export for modules to use: |
| - open acquires a connection from the pool (opens one if necessary) |
| - close releases it back in to the pool |
| */ |
| DBD_DECLARE_NONSTD(void) ap_dbd_close(server_rec *s, ap_dbd_t *rec) |
| { |
| svr_cfg *svr = ap_get_module_config(s->module_config, &dbd_module); |
| |
| if (!svr->cfg->persist) { |
| apr_pool_destroy(rec->pool); |
| } |
| #if APR_HAS_THREADS |
| else { |
| apr_reslist_release(svr->group->reslist, rec); |
| } |
| #endif |
| } |
| |
| static apr_status_t dbd_check(apr_pool_t *pool, server_rec *s, ap_dbd_t *rec) |
| { |
| svr_cfg *svr; |
| apr_status_t rv = apr_dbd_check_conn(rec->driver, pool, rec->handle); |
| const char *errmsg; |
| |
| if ((rv == APR_SUCCESS) || (rv == APR_ENOTIMPL)) { |
| return APR_SUCCESS; |
| } |
| |
| /* we don't have a driver-specific error code, so we'll just pass |
| * a "success" value and rely on the driver to ignore it |
| */ |
| errmsg = apr_dbd_error(rec->driver, rec->handle, 0); |
| if (!errmsg) { |
| errmsg = "(unknown)"; |
| } |
| |
| svr = ap_get_module_config(s->module_config, &dbd_module); |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(00639) |
| "DBD [%s] Error: %s", svr->cfg->name, errmsg); |
| return rv; |
| } |
| |
| DBD_DECLARE_NONSTD(ap_dbd_t*) ap_dbd_open(apr_pool_t *pool, server_rec *s) |
| { |
| svr_cfg *svr = ap_get_module_config(s->module_config, &dbd_module); |
| dbd_group_t *group = svr->group; |
| dbd_cfg_t *cfg = svr->cfg; |
| ap_dbd_t *rec = NULL; |
| #if APR_HAS_THREADS |
| apr_status_t rv; |
| #endif |
| |
| /* If nothing is configured, we shouldn't be here */ |
| if (cfg->name == no_dbdriver) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02654) |
| "not configured"); |
| return NULL; |
| } |
| |
| if (!cfg->persist) { |
| /* Return a once-only connection */ |
| group = apr_pcalloc(pool, sizeof(dbd_group_t)); |
| |
| group->cfg = cfg; |
| |
| dbd_construct((void*) &rec, group, pool); |
| return rec; |
| } |
| |
| #if APR_HAS_THREADS |
| if (!group->reslist) { |
| if (dbd_setup_lock(s, group) != APR_SUCCESS) { |
| return NULL; |
| } |
| } |
| |
| rv = apr_reslist_acquire(group->reslist, (void*) &rec); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(02655) |
| "Failed to acquire DBD connection from pool!"); |
| return NULL; |
| } |
| |
| if (dbd_check(pool, s, rec) != APR_SUCCESS) { |
| apr_reslist_invalidate(group->reslist, rec); |
| return NULL; |
| } |
| #else |
| /* If we have a persistent connection and it's good, we'll use it; |
| * since this is non-threaded, we can update without a mutex |
| */ |
| rec = group->rec; |
| if (rec) { |
| if (dbd_check(pool, s, rec) != APR_SUCCESS) { |
| apr_pool_destroy(rec->pool); |
| rec = NULL; |
| } |
| } |
| |
| /* We don't have a connection right now, so we'll open one */ |
| if (!rec) { |
| dbd_construct((void*) &rec, group, group->pool); |
| group->rec = rec; |
| } |
| #endif |
| |
| return rec; |
| } |
| |
| #if APR_HAS_THREADS |
| typedef struct { |
| ap_dbd_t *rec; |
| apr_reslist_t *reslist; |
| } dbd_acquire_t; |
| |
| static apr_status_t dbd_release(void *data) |
| { |
| dbd_acquire_t *acq = data; |
| apr_reslist_release(acq->reslist, acq->rec); |
| return APR_SUCCESS; |
| } |
| |
| DBD_DECLARE_NONSTD(ap_dbd_t *) ap_dbd_acquire(request_rec *r) |
| { |
| dbd_acquire_t *acq; |
| |
| while (!ap_is_initial_req(r)) { |
| if (r->prev) { |
| r = r->prev; |
| } |
| else if (r->main) { |
| r = r->main; |
| } |
| } |
| |
| acq = ap_get_module_config(r->request_config, &dbd_module); |
| if (!acq) { |
| acq = apr_palloc(r->pool, sizeof(dbd_acquire_t)); |
| acq->rec = ap_dbd_open(r->pool, r->server); |
| if (acq->rec) { |
| svr_cfg *svr = ap_get_module_config(r->server->module_config, |
| &dbd_module); |
| |
| ap_set_module_config(r->request_config, &dbd_module, acq); |
| if (svr->cfg->persist) { |
| acq->reslist = svr->group->reslist; |
| apr_pool_cleanup_register(r->pool, acq, dbd_release, |
| apr_pool_cleanup_null); |
| } |
| } |
| } |
| |
| return acq->rec; |
| } |
| |
| DBD_DECLARE_NONSTD(ap_dbd_t *) ap_dbd_cacquire(conn_rec *c) |
| { |
| dbd_acquire_t *acq = ap_get_module_config(c->conn_config, &dbd_module); |
| |
| if (!acq) { |
| acq = apr_palloc(c->pool, sizeof(dbd_acquire_t)); |
| acq->rec = ap_dbd_open(c->pool, c->base_server); |
| if (acq->rec) { |
| svr_cfg *svr = ap_get_module_config(c->base_server->module_config, |
| &dbd_module); |
| |
| ap_set_module_config(c->conn_config, &dbd_module, acq); |
| if (svr->cfg->persist) { |
| acq->reslist = svr->group->reslist; |
| apr_pool_cleanup_register(c->pool, acq, dbd_release, |
| apr_pool_cleanup_null); |
| } |
| } |
| } |
| |
| return acq->rec; |
| } |
| #else |
| DBD_DECLARE_NONSTD(ap_dbd_t *) ap_dbd_acquire(request_rec *r) |
| { |
| ap_dbd_t *rec; |
| |
| while (!ap_is_initial_req(r)) { |
| if (r->prev) { |
| r = r->prev; |
| } |
| else if (r->main) { |
| r = r->main; |
| } |
| } |
| |
| rec = ap_get_module_config(r->request_config, &dbd_module); |
| if (!rec) { |
| rec = ap_dbd_open(r->pool, r->server); |
| if (rec) { |
| ap_set_module_config(r->request_config, &dbd_module, rec); |
| } |
| } |
| |
| return rec; |
| } |
| |
| DBD_DECLARE_NONSTD(ap_dbd_t *) ap_dbd_cacquire(conn_rec *c) |
| { |
| ap_dbd_t *rec = ap_get_module_config(c->conn_config, &dbd_module); |
| |
| if (!rec) { |
| rec = ap_dbd_open(c->pool, c->base_server); |
| if (rec) { |
| ap_set_module_config(c->conn_config, &dbd_module, rec); |
| } |
| } |
| |
| return rec; |
| } |
| #endif |
| |
| static void dbd_hooks(apr_pool_t *pool) |
| { |
| ap_hook_pre_config(dbd_pre_config, NULL, NULL, APR_HOOK_MIDDLE); |
| ap_hook_post_config(dbd_post_config, NULL, NULL, APR_HOOK_MIDDLE); |
| ap_hook_child_init(dbd_child_init, NULL, NULL, APR_HOOK_MIDDLE); |
| |
| APR_REGISTER_OPTIONAL_FN(ap_dbd_prepare); |
| APR_REGISTER_OPTIONAL_FN(ap_dbd_open); |
| APR_REGISTER_OPTIONAL_FN(ap_dbd_close); |
| APR_REGISTER_OPTIONAL_FN(ap_dbd_acquire); |
| APR_REGISTER_OPTIONAL_FN(ap_dbd_cacquire); |
| |
| APR_OPTIONAL_HOOK(dbd, post_connect, dbd_init_sql_init, |
| NULL, NULL, APR_HOOK_MIDDLE); |
| |
| apr_dbd_init(pool); |
| } |
| |
| AP_DECLARE_MODULE(dbd) = { |
| STANDARD20_MODULE_STUFF, |
| NULL, |
| NULL, |
| create_dbd_config, |
| merge_dbd_config, |
| dbd_cmds, |
| dbd_hooks |
| }; |
| |
