/*
* Clears the specified configuration entry by deleting only the elements,
* that are owned by the user with specified eid_str.
*/
static void
clear_config_entry_part(struct configuration_entry *config_entry,
const char *eid_str, size_t eid_str_length)
{
cache_entry *start, *finish, *mp_entry;
TRACE_IN(clear_config_entry_part);
configuration_lock_entry(config_entry, CELT_POSITIVE);
if (config_entry->positive_cache_entry != NULL)
transform_cache_entry_part(
config_entry->positive_cache_entry,
CTT_CLEAR, eid_str, eid_str_length, KPPT_LEFT);
configuration_unlock_entry(config_entry, CELT_POSITIVE);
configuration_lock_entry(config_entry, CELT_NEGATIVE);
if (config_entry->negative_cache_entry != NULL)
transform_cache_entry_part(
config_entry->negative_cache_entry,
CTT_CLEAR, eid_str, eid_str_length, KPPT_LEFT);
configuration_unlock_entry(config_entry, CELT_NEGATIVE);
configuration_lock_entry(config_entry, CELT_MULTIPART);
if (configuration_entry_find_mp_cache_entries(config_entry,
eid_str, &start, &finish) == 0) {
for (mp_entry = start; mp_entry != finish; ++mp_entry)
transform_cache_entry(*mp_entry, CTT_CLEAR);
}
configuration_unlock_entry(config_entry, CELT_MULTIPART);
TRACE_OUT(clear_config_entry_part);
}
/*
* Clears the specified configuration entry (clears the cache for positive and
* and negative entries) and also for all multipart entries.
*/
static void
clear_config_entry(struct configuration_entry *config_entry)
{
size_t i;
TRACE_IN(clear_config_entry);
configuration_lock_entry(config_entry, CELT_POSITIVE);
if (config_entry->positive_cache_entry != NULL)
transform_cache_entry(
config_entry->positive_cache_entry,
CTT_CLEAR);
configuration_unlock_entry(config_entry, CELT_POSITIVE);
configuration_lock_entry(config_entry, CELT_NEGATIVE);
if (config_entry->negative_cache_entry != NULL)
transform_cache_entry(
config_entry->negative_cache_entry,
CTT_CLEAR);
configuration_unlock_entry(config_entry, CELT_NEGATIVE);
configuration_lock_entry(config_entry, CELT_MULTIPART);
for (i = 0; i < config_entry->mp_cache_entries_size; ++i)
transform_cache_entry(
config_entry->mp_cache_entries[i],
CTT_CLEAR);
configuration_unlock_entry(config_entry, CELT_MULTIPART);
TRACE_OUT(clear_config_entry);
}
static int
on_mp_write_session_write_request_process(struct query_state *qstate)
{
struct cache_mp_write_session_write_request *write_request;
struct cache_mp_write_session_write_response *write_response;
TRACE_IN(on_mp_write_session_write_request_process);
init_comm_element(&qstate->response,
CET_MP_WRITE_SESSION_WRITE_RESPONSE);
write_response = get_cache_mp_write_session_write_response(
&qstate->response);
write_request = get_cache_mp_write_session_write_request(
&qstate->request);
configuration_lock_entry(qstate->config_entry, CELT_MULTIPART);
write_response->error_code = cache_mp_write(
(cache_mp_write_session)qstate->mdata,
write_request->data,
write_request->data_size);
configuration_unlock_entry(qstate->config_entry, CELT_MULTIPART);
qstate->kevent_watermark = sizeof(int);
qstate->process_func = on_mp_write_session_write_response_write1;
qstate->kevent_filter = EVFILT_WRITE;
TRACE_OUT(on_mp_write_session_write_request_process);
return (0);
}
cache_entry register_new_mp_cache_entry(struct query_state *qstate,
const char *dec_cache_entry_name)
{
cache_entry c_entry;
char *en_bkp;
TRACE_IN(register_new_mp_cache_entry);
c_entry = INVALID_CACHE_ENTRY;
configuration_lock_entry(qstate->config_entry, CELT_MULTIPART);
configuration_lock_wrlock(s_configuration);
en_bkp = qstate->config_entry->mp_cache_params.cep.entry_name;
qstate->config_entry->mp_cache_params.cep.entry_name =
(char *)dec_cache_entry_name;
register_cache_entry(s_cache, (struct cache_entry_params *)
&qstate->config_entry->mp_cache_params);
qstate->config_entry->mp_cache_params.cep.entry_name = en_bkp;
configuration_unlock(s_configuration);
configuration_lock_rdlock(s_configuration);
c_entry = find_cache_entry(s_cache,
dec_cache_entry_name);
configuration_unlock(s_configuration);
configuration_entry_add_mp_cache_entry(qstate->config_entry,
c_entry);
configuration_unlock_entry(qstate->config_entry,
CELT_MULTIPART);
TRACE_OUT(register_new_mp_cache_entry);
return (c_entry);
}
/*
* The functions below are used to process multipart read sessions read
* requests. User doesn't have to pass any kind of data, besides the
* request identificator itself. So we don't need any XXX_read functions and
* start with the XXX_process function.
* - on_mp_read_session_read_request_process processes it
* - on_mp_read_session_read_response_write1 and
* on_mp_read_session_read_response_write2 sends the response
*/
static int
on_mp_read_session_read_request_process(struct query_state *qstate)
{
struct cache_mp_read_session_read_response *read_response;
TRACE_IN(on_mp_read_session_response_process);
init_comm_element(&qstate->response, CET_MP_READ_SESSION_READ_RESPONSE);
read_response = get_cache_mp_read_session_read_response(
&qstate->response);
configuration_lock_entry(qstate->config_entry, CELT_MULTIPART);
read_response->error_code = cache_mp_read(
(cache_mp_read_session)qstate->mdata, NULL,
&read_response->data_size);
if (read_response->error_code == 0) {
read_response->data = malloc(read_response->data_size);
assert(read_response != NULL);
read_response->error_code = cache_mp_read(
(cache_mp_read_session)qstate->mdata,
read_response->data,
&read_response->data_size);
}
configuration_unlock_entry(qstate->config_entry, CELT_MULTIPART);
if (read_response->error_code == 0)
qstate->kevent_watermark = sizeof(size_t) + sizeof(int);
else
qstate->kevent_watermark = sizeof(int);
qstate->process_func = on_mp_read_session_read_response_write1;
qstate->kevent_filter = EVFILT_WRITE;
TRACE_OUT(on_mp_read_session_response_process);
return (0);
}
/*
* Handles close notifications. Commits the session by calling
* the close_cache_mp_write_session.
*/
static int
on_mp_write_session_close_notification(struct query_state *qstate)
{
TRACE_IN(on_mp_write_session_close_notification);
configuration_lock_entry(qstate->config_entry, CELT_MULTIPART);
close_cache_mp_write_session((cache_mp_write_session)qstate->mdata);
configuration_unlock_entry(qstate->config_entry, CELT_MULTIPART);
qstate->mdata = INVALID_CACHE_MP_WRITE_SESSION;
qstate->kevent_watermark = 0;
qstate->process_func = NULL;
TRACE_OUT(on_mp_write_session_close_notification);
return (0);
}
/*
* This function is used as the query_state's destroy_func to make the
* proper cleanup in case of errors.
*/
static void
on_mp_read_session_destroy(struct query_state *qstate)
{
TRACE_IN(on_mp_read_session_destroy);
finalize_comm_element(&qstate->request);
finalize_comm_element(&qstate->response);
if (qstate->mdata != NULL) {
configuration_lock_entry(qstate->config_entry, CELT_MULTIPART);
close_cache_mp_read_session(
(cache_mp_read_session)qstate->mdata);
configuration_unlock_entry(qstate->config_entry,
CELT_MULTIPART);
}
TRACE_OUT(on_mp_read_session_destroy);
}
static int
on_read_request_process(struct query_state *qstate)
{
struct cache_read_request *read_request;
struct cache_read_response *read_response;
cache_entry c_entry, neg_c_entry;
struct agent *lookup_agent;
struct common_agent *c_agent;
int res;
TRACE_IN(on_read_request_process);
init_comm_element(&qstate->response, CET_READ_RESPONSE);
read_response = get_cache_read_response(&qstate->response);
read_request = get_cache_read_request(&qstate->request);
qstate->config_entry = configuration_find_entry(
s_configuration, read_request->entry);
if (qstate->config_entry == NULL) {
read_response->error_code = ENOENT;
LOG_ERR_2("read_request",
"can't find configuration "
"entry '%s'. aborting request", read_request->entry);
goto fin;
}
if (qstate->config_entry->enabled == 0) {
read_response->error_code = EACCES;
LOG_ERR_2("read_request",
"configuration entry '%s' is disabled",
read_request->entry);
goto fin;
}
/*
* if we perform lookups by ourselves, then we don't need to separate
* cache entries by euid and egid
*/
if (qstate->config_entry->perform_actual_lookups != 0)
memset(read_request->cache_key, 0, qstate->eid_str_length);
else {
#ifdef NS_NSCD_EID_CHECKING
if (check_query_eids(qstate) != 0) {
/* if the lookup is not self-performing, we check for clients euid/egid */
read_response->error_code = EPERM;
goto fin;
}
#endif
}
configuration_lock_rdlock(s_configuration);
c_entry = find_cache_entry(s_cache,
qstate->config_entry->positive_cache_params.entry_name);
neg_c_entry = find_cache_entry(s_cache,
qstate->config_entry->negative_cache_params.entry_name);
configuration_unlock(s_configuration);
if ((c_entry != NULL) && (neg_c_entry != NULL)) {
configuration_lock_entry(qstate->config_entry, CELT_POSITIVE);
qstate->config_entry->positive_cache_entry = c_entry;
read_response->error_code = cache_read(c_entry,
read_request->cache_key,
read_request->cache_key_size, NULL,
&read_response->data_size);
if (read_response->error_code == -2) {
read_response->data = (char *)malloc(
read_response->data_size);
assert(read_response != NULL);
read_response->error_code = cache_read(c_entry,
read_request->cache_key,
read_request->cache_key_size,
read_response->data,
&read_response->data_size);
}
configuration_unlock_entry(qstate->config_entry, CELT_POSITIVE);
configuration_lock_entry(qstate->config_entry, CELT_NEGATIVE);
qstate->config_entry->negative_cache_entry = neg_c_entry;
if (read_response->error_code == -1) {
read_response->error_code = cache_read(neg_c_entry,
read_request->cache_key,
read_request->cache_key_size, NULL,
&read_response->data_size);
if (read_response->error_code == -2) {
read_response->error_code = 0;
read_response->data = NULL;
read_response->data_size = 0;
}
}
configuration_unlock_entry(qstate->config_entry, CELT_NEGATIVE);
if ((read_response->error_code == -1) &&
(qstate->config_entry->perform_actual_lookups != 0)) {
free(read_response->data);
read_response->data = NULL;
read_response->data_size = 0;
lookup_agent = find_agent(s_agent_table,
read_request->entry, COMMON_AGENT);
if ((lookup_agent != NULL) &&
(lookup_agent->type == COMMON_AGENT)) {
c_agent = (struct common_agent *)lookup_agent;
res = c_agent->lookup_func(
read_request->cache_key +
qstate->eid_str_length,
read_request->cache_key_size -
qstate->eid_str_length,
&read_response->data,
&read_response->data_size);
if (res == NS_SUCCESS) {
read_response->error_code = 0;
configuration_lock_entry(
qstate->config_entry,
CELT_POSITIVE);
cache_write(c_entry,
read_request->cache_key,
read_request->cache_key_size,
read_response->data,
read_response->data_size);
configuration_unlock_entry(
qstate->config_entry,
CELT_POSITIVE);
} else if ((res == NS_NOTFOUND) ||
(res == NS_RETURN)) {
configuration_lock_entry(
qstate->config_entry,
CELT_NEGATIVE);
cache_write(neg_c_entry,
read_request->cache_key,
read_request->cache_key_size,
negative_data,
sizeof(negative_data));
configuration_unlock_entry(
qstate->config_entry,
CELT_NEGATIVE);
read_response->error_code = 0;
read_response->data = NULL;
read_response->data_size = 0;
}
}
}
if ((qstate->config_entry->common_query_timeout.tv_sec != 0) ||
(qstate->config_entry->common_query_timeout.tv_usec != 0))
memcpy(&qstate->timeout,
&qstate->config_entry->common_query_timeout,
sizeof(struct timeval));
} else
read_response->error_code = -1;
fin:
qstate->kevent_filter = EVFILT_WRITE;
if (read_response->error_code == 0)
qstate->kevent_watermark = sizeof(int) + sizeof(size_t);
else
qstate->kevent_watermark = sizeof(int);
qstate->process_func = on_read_response_write1;
TRACE_OUT(on_read_request_process);
return (0);
}
static int
on_negative_write_request_process(struct query_state *qstate)
{
struct cache_write_request *write_request;
struct cache_write_response *write_response;
cache_entry c_entry;
TRACE_IN(on_negative_write_request_process);
init_comm_element(&qstate->response, CET_WRITE_RESPONSE);
write_response = get_cache_write_response(&qstate->response);
write_request = get_cache_write_request(&qstate->request);
qstate->config_entry = configuration_find_entry(
s_configuration, write_request->entry);
if (qstate->config_entry == NULL) {
write_response->error_code = ENOENT;
LOG_ERR_2("negative_write_request",
"can't find configuration"
" entry '%s'. aborting request", write_request->entry);
goto fin;
}
if (qstate->config_entry->enabled == 0) {
write_response->error_code = EACCES;
LOG_ERR_2("negative_write_request",
"configuration entry '%s' is disabled",
write_request->entry);
goto fin;
}
if (qstate->config_entry->perform_actual_lookups != 0) {
write_response->error_code = EOPNOTSUPP;
LOG_ERR_2("negative_write_request",
"entry '%s' performs lookups by itself: "
"can't write to it", write_request->entry);
goto fin;
} else {
#ifdef NS_NSCD_EID_CHECKING
if (check_query_eids(qstate) != 0) {
write_response->error_code = EPERM;
goto fin;
}
#endif
}
configuration_lock_rdlock(s_configuration);
c_entry = find_cache_entry(s_cache,
qstate->config_entry->negative_cache_params.entry_name);
configuration_unlock(s_configuration);
if (c_entry != NULL) {
configuration_lock_entry(qstate->config_entry, CELT_NEGATIVE);
qstate->config_entry->negative_cache_entry = c_entry;
write_response->error_code = cache_write(c_entry,
write_request->cache_key,
write_request->cache_key_size,
negative_data,
sizeof(negative_data));
configuration_unlock_entry(qstate->config_entry, CELT_NEGATIVE);
if ((qstate->config_entry->common_query_timeout.tv_sec != 0) ||
(qstate->config_entry->common_query_timeout.tv_usec != 0))
memcpy(&qstate->timeout,
&qstate->config_entry->common_query_timeout,
sizeof(struct timeval));
} else
write_response->error_code = -1;
fin:
qstate->kevent_filter = EVFILT_WRITE;
qstate->kevent_watermark = sizeof(int);
qstate->process_func = on_write_response_write1;
TRACE_OUT(on_negative_write_request_process);
return (0);
}
static int
on_mp_write_session_request_process(struct query_state *qstate)
{
struct cache_mp_write_session_request *c_mp_ws_request;
struct cache_mp_write_session_response *c_mp_ws_response;
cache_mp_write_session ws;
cache_entry c_entry;
char *dec_cache_entry_name;
TRACE_IN(on_mp_write_session_request_process);
init_comm_element(&qstate->response, CET_MP_WRITE_SESSION_RESPONSE);
c_mp_ws_response = get_cache_mp_write_session_response(
&qstate->response);
c_mp_ws_request = get_cache_mp_write_session_request(&qstate->request);
qstate->config_entry = configuration_find_entry(
s_configuration, c_mp_ws_request->entry);
if (qstate->config_entry == NULL) {
c_mp_ws_response->error_code = ENOENT;
LOG_ERR_2("write_session_request",
"can't find configuration entry '%s'. "
"aborting request", c_mp_ws_request->entry);
goto fin;
}
if (qstate->config_entry->enabled == 0) {
c_mp_ws_response->error_code = EACCES;
LOG_ERR_2("write_session_request",
"configuration entry '%s' is disabled",
c_mp_ws_request->entry);
goto fin;
}
if (qstate->config_entry->perform_actual_lookups != 0) {
c_mp_ws_response->error_code = EOPNOTSUPP;
LOG_ERR_2("write_session_request",
"entry '%s' performs lookups by itself: "
"can't write to it", c_mp_ws_request->entry);
goto fin;
} else {
#ifdef NS_NSCD_EID_CHECKING
if (check_query_eids(qstate) != 0) {
c_mp_ws_response->error_code = EPERM;
goto fin;
}
#endif
}
/*
* All multipart entries are separated by their name decorations.
* For one configuration entry there will be a lot of multipart
* cache entries - each with its own decorated name.
*/
asprintf(&dec_cache_entry_name, "%s%s", qstate->eid_str,
qstate->config_entry->mp_cache_params.cep.entry_name);
assert(dec_cache_entry_name != NULL);
configuration_lock_rdlock(s_configuration);
c_entry = find_cache_entry(s_cache,
dec_cache_entry_name);
configuration_unlock(s_configuration);
if (c_entry == INVALID_CACHE_ENTRY)
c_entry = register_new_mp_cache_entry(qstate,
dec_cache_entry_name);
free(dec_cache_entry_name);
assert(c_entry != NULL);
configuration_lock_entry(qstate->config_entry, CELT_MULTIPART);
ws = open_cache_mp_write_session(c_entry);
if (ws == INVALID_CACHE_MP_WRITE_SESSION)
c_mp_ws_response->error_code = -1;
else {
qstate->mdata = ws;
qstate->destroy_func = on_mp_write_session_destroy;
if ((qstate->config_entry->mp_query_timeout.tv_sec != 0) ||
(qstate->config_entry->mp_query_timeout.tv_usec != 0))
memcpy(&qstate->timeout,
&qstate->config_entry->mp_query_timeout,
sizeof(struct timeval));
}
configuration_unlock_entry(qstate->config_entry, CELT_MULTIPART);
fin:
qstate->process_func = on_mp_write_session_response_write1;
qstate->kevent_watermark = sizeof(int);
qstate->kevent_filter = EVFILT_WRITE;
TRACE_OUT(on_mp_write_session_request_process);
return (0);
}
static int
on_mp_read_session_request_process(struct query_state *qstate)
{
struct cache_mp_read_session_request *c_mp_rs_request;
struct cache_mp_read_session_response *c_mp_rs_response;
cache_mp_read_session rs;
cache_entry c_entry;
char *dec_cache_entry_name;
char *buffer;
size_t buffer_size;
cache_mp_write_session ws;
struct agent *lookup_agent;
struct multipart_agent *mp_agent;
void *mdata;
int res;
TRACE_IN(on_mp_read_session_request_process);
init_comm_element(&qstate->response, CET_MP_READ_SESSION_RESPONSE);
c_mp_rs_response = get_cache_mp_read_session_response(
&qstate->response);
c_mp_rs_request = get_cache_mp_read_session_request(&qstate->request);
qstate->config_entry = configuration_find_entry(
s_configuration, c_mp_rs_request->entry);
if (qstate->config_entry == NULL) {
c_mp_rs_response->error_code = ENOENT;
LOG_ERR_2("read_session_request",
"can't find configuration entry '%s'."
" aborting request", c_mp_rs_request->entry);
goto fin;
}
if (qstate->config_entry->enabled == 0) {
c_mp_rs_response->error_code = EACCES;
LOG_ERR_2("read_session_request",
"configuration entry '%s' is disabled",
c_mp_rs_request->entry);
goto fin;
}
if (qstate->config_entry->perform_actual_lookups != 0)
dec_cache_entry_name = strdup(
qstate->config_entry->mp_cache_params.cep.entry_name);
else {
#ifdef NS_NSCD_EID_CHECKING
if (check_query_eids(qstate) != 0) {
c_mp_rs_response->error_code = EPERM;
goto fin;
}
#endif
asprintf(&dec_cache_entry_name, "%s%s", qstate->eid_str,
qstate->config_entry->mp_cache_params.cep.entry_name);
}
assert(dec_cache_entry_name != NULL);
configuration_lock_rdlock(s_configuration);
c_entry = find_cache_entry(s_cache, dec_cache_entry_name);
configuration_unlock(s_configuration);
if ((c_entry == INVALID_CACHE) &&
(qstate->config_entry->perform_actual_lookups != 0))
c_entry = register_new_mp_cache_entry(qstate,
dec_cache_entry_name);
free(dec_cache_entry_name);
if (c_entry != INVALID_CACHE_ENTRY) {
configuration_lock_entry(qstate->config_entry, CELT_MULTIPART);
rs = open_cache_mp_read_session(c_entry);
configuration_unlock_entry(qstate->config_entry,
CELT_MULTIPART);
if ((rs == INVALID_CACHE_MP_READ_SESSION) &&
(qstate->config_entry->perform_actual_lookups != 0)) {
lookup_agent = find_agent(s_agent_table,
c_mp_rs_request->entry, MULTIPART_AGENT);
if ((lookup_agent != NULL) &&
(lookup_agent->type == MULTIPART_AGENT)) {
mp_agent = (struct multipart_agent *)
lookup_agent;
mdata = mp_agent->mp_init_func();
/*
* Multipart agents read the whole snapshot
* of the data at one time.
*/
configuration_lock_entry(qstate->config_entry,
CELT_MULTIPART);
ws = open_cache_mp_write_session(c_entry);
configuration_unlock_entry(qstate->config_entry,
CELT_MULTIPART);
if (ws != NULL) {
do {
buffer = NULL;
res = mp_agent->mp_lookup_func(&buffer,
&buffer_size,
mdata);
if ((res & NS_TERMINATE) &&
(buffer != NULL)) {
configuration_lock_entry(
qstate->config_entry,
CELT_MULTIPART);
if (cache_mp_write(ws, buffer,
buffer_size) != 0) {
abandon_cache_mp_write_session(ws);
ws = NULL;
}
configuration_unlock_entry(
qstate->config_entry,
CELT_MULTIPART);
free(buffer);
buffer = NULL;
} else {
configuration_lock_entry(
qstate->config_entry,
CELT_MULTIPART);
close_cache_mp_write_session(ws);
configuration_unlock_entry(
qstate->config_entry,
CELT_MULTIPART);
free(buffer);
buffer = NULL;
}
} while ((res & NS_TERMINATE) &&
(ws != NULL));
}
configuration_lock_entry(qstate->config_entry,
CELT_MULTIPART);
rs = open_cache_mp_read_session(c_entry);
configuration_unlock_entry(qstate->config_entry,
CELT_MULTIPART);
}
}
if (rs == INVALID_CACHE_MP_READ_SESSION)
c_mp_rs_response->error_code = -1;
else {
qstate->mdata = rs;
qstate->destroy_func = on_mp_read_session_destroy;
configuration_lock_entry(qstate->config_entry,
CELT_MULTIPART);
if ((qstate->config_entry->mp_query_timeout.tv_sec != 0) ||
(qstate->config_entry->mp_query_timeout.tv_usec != 0))
memcpy(&qstate->timeout,
&qstate->config_entry->mp_query_timeout,
sizeof(struct timeval));
configuration_unlock_entry(qstate->config_entry,
CELT_MULTIPART);
}
} else
c_mp_rs_response->error_code = -1;
fin:
qstate->process_func = on_mp_read_session_response_write1;
qstate->kevent_watermark = sizeof(int);
qstate->kevent_filter = EVFILT_WRITE;
TRACE_OUT(on_mp_read_session_request_process);
return (0);
}