static int is_new_config(lcb_t instance, VBUCKET_CONFIG_HANDLE oldc, VBUCKET_CONFIG_HANDLE newc) { VBUCKET_CONFIG_DIFF *diff; VBUCKET_CHANGE_STATUS chstatus = VBUCKET_NO_CHANGES; diff = vbucket_compare(oldc, newc); if (diff) { chstatus = vbucket_what_changed(diff); log_vbdiff(instance, diff); vbucket_free_diff(diff); } if (diff == NULL || chstatus == VBUCKET_NO_CHANGES) { lcb_log(LOGARGS(instance, DEBUG), "Ignoring config update. No server changes; DIFF=%p", (void*)diff); return 0; } return 1; }
static lcb_error_t set_next_config(struct htvb_st *vbs) { VBUCKET_CONFIG_HANDLE new_config = NULL; new_config = vbucket_config_create(); if (!new_config) { return LCB_CLIENT_ENOMEM; } if (vbucket_config_parse(new_config, LIBVBUCKET_SOURCE_MEMORY, vbs->input.base)) { vbucket_config_destroy(new_config); return LCB_PROTOCOL_ERROR; } if (vbs->config) { /** We have a previous configuration... */ VBUCKET_CHANGE_STATUS chstatus = VBUCKET_NO_CHANGES; VBUCKET_CONFIG_DIFF *diff = NULL; VBUCKET_CONFIG_HANDLE old_config = vbs->config->vbc; diff = vbucket_compare(old_config, new_config); if (diff) { chstatus = vbucket_what_changed(diff); vbucket_free_diff(diff); } if (chstatus == VBUCKET_NO_CHANGES) { vbs->config->cmpclock = gethrtime(); vbucket_config_destroy(new_config); return LCB_SUCCESS; } } if (vbs->config) { lcb_clconfig_decref(vbs->config); } vbs->config = lcb_clconfig_create(new_config, &vbs->input, LCB_CLCONFIG_HTTP); vbs->config->cmpclock = gethrtime(); vbs->generation++; return LCB_SUCCESS; }
static int load_cache(file_provider *provider) { lcb_string str; char line[1024]; lcb_ssize_t nr; int fail; FILE *fp = NULL; VBUCKET_CONFIG_HANDLE config = NULL; char *end; struct stat st; int status = -1; lcb_string_init(&str); if (provider->filename == NULL) { return -1; } fp = fopen(provider->filename, "r"); if (fp == NULL) { LOG(provider, ERROR, "Couldn't open filename"); return -1; } if (fstat(fileno(fp), &st)) { provider->last_errno = errno; goto GT_DONE; } if (provider->last_mtime == st.st_mtime) { LOG(provider, INFO, "Rejecting file. Modification time too old"); goto GT_DONE; } config = vbucket_config_create(); if (config == NULL) { goto GT_DONE; } lcb_string_init(&str); while ((nr = fread(line, 1, sizeof(line), fp)) > 0) { if (lcb_string_append(&str, line, nr)) { goto GT_DONE; } } if (ferror(fp)) { goto GT_DONE; } fclose(fp); fp = NULL; if (!str.nused) { status = -1; goto GT_DONE; } end = strstr(str.base, CONFIG_CACHE_MAGIC); if (end == NULL) { LOG(provider, ERROR, "Couldn't find magic in file"); remove(provider->filename); status = -1; goto GT_DONE; } fail = vbucket_config_parse(config, LIBVBUCKET_SOURCE_MEMORY, str.base); if (fail) { status = -1; LOG(provider, ERROR, "Couldn't parse configuration"); remove(provider->filename); goto GT_DONE; } if (vbucket_config_get_distribution_type(config) != VBUCKET_DISTRIBUTION_VBUCKET) { status = -1; LOG(provider, ERROR, "Not applying cached memcached config"); goto GT_DONE; } if (provider->config) { VBUCKET_CHANGE_STATUS chstatus; VBUCKET_CONFIG_DIFF *diff = vbucket_compare(provider->config->vbc, config); if (diff == NULL) { goto GT_DONE; } chstatus = vbucket_what_changed(diff); vbucket_free_diff(diff); if (chstatus == VBUCKET_NO_CHANGES) { goto GT_DONE; } } if (provider->config) { lcb_clconfig_decref(provider->config); } provider->config = lcb_clconfig_create(config, &str, LCB_CLCONFIG_FILE); provider->config->cmpclock = gethrtime(); provider->config->origin = provider->base.type; status = 0; config = NULL; GT_DONE: if (fp != NULL) { fclose(fp); } if (config != NULL) { vbucket_config_destroy(config); } lcb_string_release(&str); return status; }