void dec_nsm_client_ref_locked(state_nsm_client_t *pclient)
{
bool_t remove = FALSE;
char str[HASHTABLE_DISPLAY_STRLEN];
if(isFullDebug(COMPONENT_STATE))
display_nsm_client(pclient, str);
if(pclient->ssc_refcount > 1)
{
pclient->ssc_refcount--;
LogFullDebug(COMPONENT_STATE,
"Decrement refcount NSM Client {%s}",
str);
}
else
remove = TRUE;
V(pclient->ssc_mutex);
if(remove)
{
hash_buffer_t buffkey, old_key, old_value;
buffkey.pdata = (caddr_t) pclient;
buffkey.len = sizeof(*pclient);
switch(HashTable_DelRef(ht_nsm_client, &buffkey, &old_key, &old_value, Hash_dec_nsm_client_ref))
{
case HASHTABLE_SUCCESS:
LogFullDebug(COMPONENT_STATE,
"Free NSM Client {%s} size %llx",
str, (unsigned long long) old_value.len);
nsm_unmonitor((state_nsm_client_t *) old_value.pdata);
free_nsm_client((state_nsm_client_t *) old_key.pdata);
free_nsm_client((state_nsm_client_t *) old_value.pdata);
break;
case HASHTABLE_NOT_DELETED:
/* ref count didn't end up at 0, don't free. */
LogDebug(COMPONENT_STATE,
"HashTable_DelRef didn't reduce refcount to 0 for NSM Client {%s}",
str);
break;
default:
/* some problem occurred */
LogDebug(COMPONENT_STATE,
"HashTable_DelRef failed for NSM Client {%s}",
str);
break;
}
}
}
state_nsm_client_t *get_nsm_client(care_t care,
SVCXPRT * xprt,
char * caller_name)
{
state_nsm_client_t key;
state_nsm_client_t * pclient;
char sock_name[SOCK_NAME_MAX];
char str[HASHTABLE_DISPLAY_STRLEN];
struct hash_latch latch;
hash_error_t rc;
hash_buffer_t buffkey;
hash_buffer_t buffval;
if(caller_name == NULL)
return NULL;
memset(&key, 0, sizeof(key));
if(nfs_param.core_param.nsm_use_caller_name)
{
key.ssc_nlm_caller_name_len = strlen(caller_name);
if(key.ssc_nlm_caller_name_len > LM_MAXSTRLEN)
{
return NULL;
}
key.ssc_nlm_caller_name = caller_name;
}
else if(xprt == NULL)
{
int rc = ipstring_to_sockaddr(caller_name, &key.ssc_client_addr);
if(rc != 0)
{
LogEvent(COMPONENT_STATE,
"Error %s, converting caller_name %s to an ipaddress",
gai_strerror(rc), caller_name);
return NULL;
}
key.ssc_nlm_caller_name_len = strlen(caller_name);
if(key.ssc_nlm_caller_name_len > LM_MAXSTRLEN)
{
return NULL;
}
key.ssc_nlm_caller_name = caller_name;
}
else
{
key.ssc_nlm_caller_name = sock_name;
if(copy_xprt_addr(&key.ssc_client_addr, xprt) == 0)
{
LogCrit(COMPONENT_STATE,
"Error converting caller_name %s to an ipaddress",
caller_name);
return NULL;
}
if(sprint_sockip(&key.ssc_client_addr,
key.ssc_nlm_caller_name,
sizeof(sock_name)) == 0)
{
LogCrit(COMPONENT_STATE,
"Error converting caller_name %s to an ipaddress",
caller_name);
return NULL;
}
key.ssc_nlm_caller_name_len = strlen(key.ssc_nlm_caller_name);
}
if(isFullDebug(COMPONENT_STATE))
{
display_nsm_client(&key, str);
LogFullDebug(COMPONENT_STATE,
"Find {%s}", str);
}
buffkey.pdata = &key;
buffkey.len = sizeof(key);
rc = HashTable_GetLatch(ht_nsm_client,
&buffkey,
&buffval,
TRUE,
&latch);
/* If we found it, return it */
if(rc == HASHTABLE_SUCCESS)
{
pclient = buffval.pdata;
/* Return the found NSM Client */
if(isFullDebug(COMPONENT_STATE))
{
display_nsm_client(pclient, str);
LogFullDebug(COMPONENT_STATE,
"Found {%s}",
str);
}
/* Increment refcount under hash latch.
* This prevents dec ref from removing this entry from hash if a race
* occurs.
*/
inc_nsm_client_ref(pclient);
HashTable_ReleaseLatched(ht_nsm_client, &latch);
if(care == CARE_MONITOR && !nsm_monitor(pclient))
{
dec_nsm_client_ref(pclient);
pclient = NULL;
}
return pclient;
}
/* An error occurred, return NULL */
if(rc != HASHTABLE_ERROR_NO_SUCH_KEY)
{
display_nsm_client(&key, str);
LogCrit(COMPONENT_STATE,
"Error %s, could not find {%s}",
hash_table_err_to_str(rc), str);
return NULL;
}
/* Not found, but we don't care, return NULL */
if(care == CARE_NOT)
{
/* Return the found NSM Client */
if(isFullDebug(COMPONENT_STATE))
{
display_nsm_client(&key, str);
LogFullDebug(COMPONENT_STATE,
"Ignoring {%s}",
str);
}
HashTable_ReleaseLatched(ht_nsm_client, &latch);
return NULL;
}
pclient = gsh_malloc(sizeof(*pclient));
if(pclient == NULL)
{
display_nsm_client(&key, str);
LogCrit(COMPONENT_STATE,
"No memory for {%s}",
str);
return NULL;
}
/* Copy everything over */
memcpy(pclient, &key, sizeof(key));
if(pthread_mutex_init(&pclient->ssc_mutex, NULL) == -1)
{
/* Mutex initialization failed, free the created client */
display_nsm_client(&key, str);
LogCrit(COMPONENT_STATE,
"Could not init mutex for {%s}",
str);
gsh_free(pclient);
return NULL;
}
pclient->ssc_nlm_caller_name = gsh_strdup(key.ssc_nlm_caller_name);
if(pclient->ssc_nlm_caller_name == NULL)
{
/* Discard the created client */
free_nsm_client(pclient);
return NULL;
}
init_glist(&pclient->ssc_lock_list);
init_glist(&pclient->ssc_share_list);
pclient->ssc_refcount = 1;
if(isFullDebug(COMPONENT_STATE))
{
display_nsm_client(pclient, str);
LogFullDebug(COMPONENT_STATE,
"New {%s}", str);
}
buffkey.pdata = pclient;
buffkey.len = sizeof(*pclient);
buffval.pdata = pclient;
buffval.len = sizeof(*pclient);
rc = HashTable_SetLatched(ht_nsm_client,
&buffval,
&buffval,
&latch,
FALSE,
NULL,
NULL);
/* An error occurred, return NULL */
if(rc != HASHTABLE_SUCCESS)
{
display_nsm_client(pclient, str);
LogCrit(COMPONENT_STATE,
"Error %s, inserting {%s}",
hash_table_err_to_str(rc), str);
free_nsm_client(pclient);
return NULL;
}
if(care != CARE_MONITOR || nsm_monitor(pclient))
return pclient;
/* Failed to monitor, release client reference
* and almost certainly remove it from the hash table.
*/
dec_nsm_client_ref(pclient);
return NULL;
}
void dec_nsm_client_ref(state_nsm_client_t *pclient)
{
char str[HASHTABLE_DISPLAY_STRLEN];
struct hash_latch latch;
hash_error_t rc;
hash_buffer_t buffkey;
hash_buffer_t old_value;
hash_buffer_t old_key;
int32_t refcount;
if(isDebug(COMPONENT_STATE))
display_nsm_client(pclient, str);
refcount = atomic_dec_int32_t(&pclient->ssc_refcount);
if(refcount > 0)
{
LogFullDebug(COMPONENT_STATE,
"Decrement refcount now=%"PRId32" {%s}",
refcount, str);
return;
}
LogFullDebug(COMPONENT_STATE,
"Try to remove {%s}",
str);
buffkey.pdata = pclient;
buffkey.len = sizeof(*pclient);
/* Get the hash table entry and hold latch */
rc = HashTable_GetLatch(ht_nsm_client,
&buffkey,
&old_value,
TRUE,
&latch);
if(rc != HASHTABLE_SUCCESS)
{
if(rc == HASHTABLE_ERROR_NO_SUCH_KEY)
HashTable_ReleaseLatched(ht_nsm_client, &latch);
display_nsm_client(pclient, str);
LogCrit(COMPONENT_STATE,
"Error %s, could not find {%s}",
hash_table_err_to_str(rc), str);
return;
}
refcount = atomic_fetch_int32_t(&pclient->ssc_refcount);
if(refcount > 0)
{
LogDebug(COMPONENT_STATE,
"Did not release refcount now=%"PRId32" {%s}",
refcount, str);
HashTable_ReleaseLatched(ht_nsm_client, &latch);
return;
}
/* use the key to delete the entry */
rc = HashTable_DeleteLatched(ht_nsm_client,
&buffkey,
&latch,
&old_key,
&old_value);
if(rc != HASHTABLE_SUCCESS)
{
if(rc == HASHTABLE_ERROR_NO_SUCH_KEY)
HashTable_ReleaseLatched(ht_nsm_client, &latch);
display_nsm_client(pclient, str);
LogCrit(COMPONENT_STATE,
"Error %s, could not remove {%s}",
hash_table_err_to_str(rc), str);
return;
}
LogFullDebug(COMPONENT_STATE,
"Free {%s}",
str);
nsm_unmonitor(old_value.pdata);
free_nsm_client(old_value.pdata);
}
state_nsm_client_t *get_nsm_client(care_t care,
SVCXPRT * xprt,
const char * caller_name)
{
state_nsm_client_t *pkey, *pclient;
if(caller_name == NULL)
return NULL;
pkey = (state_nsm_client_t *)Mem_Alloc(sizeof(*pkey));
if(pkey == NULL)
return NULL;
memset(pkey, 0, sizeof(*pkey));
pkey->ssc_refcount = 1;
if(nfs_param.core_param.nsm_use_caller_name)
{
pkey->ssc_nlm_caller_name_len = strlen(caller_name);
if(pkey->ssc_nlm_caller_name_len > LM_MAXSTRLEN)
{
/* Discard the key we created */
free_nsm_client(pkey);
return NULL;
}
pkey->ssc_nlm_caller_name = Mem_Alloc(pkey->ssc_nlm_caller_name_len + 1);
if(pkey->ssc_nlm_caller_name == NULL)
{
/* Discard the key we created */
free_nsm_client(pkey);
return NULL;
}
memcpy(pkey->ssc_nlm_caller_name,
caller_name,
pkey->ssc_nlm_caller_name_len);
pkey->ssc_nlm_caller_name[pkey->ssc_nlm_caller_name_len] = '\0';
}
else
{
pkey->ssc_nlm_caller_name_len = SOCK_NAME_MAX;
pkey->ssc_nlm_caller_name = Mem_Alloc(SOCK_NAME_MAX);
if(pkey->ssc_nlm_caller_name == NULL)
{
/* Discard the key we created */
free_nsm_client(pkey);
return NULL;
}
if(copy_xprt_addr(&pkey->ssc_client_addr, xprt) == 0)
{
/* Discard the key we created */
free_nsm_client(pkey);
return NULL;
}
if(sprint_sockip(&pkey->ssc_client_addr, pkey->ssc_nlm_caller_name, SOCK_NAME_MAX) == 0)
{
/* Discard the key we created */
free_nsm_client(pkey);
return NULL;
}
pkey->ssc_nlm_caller_name_len = strlen(pkey->ssc_nlm_caller_name);
}
if(isFullDebug(COMPONENT_STATE))
{
char str[HASHTABLE_DISPLAY_STRLEN];
display_nsm_client(pkey, str);
LogFullDebug(COMPONENT_STATE,
"Find NSM Client pkey {%s}", str);
}
/* If we found it, return it, if we don't care, return NULL */
if(nsm_client_Get_Pointer(pkey, &pclient) == 1 || care == CARE_NOT)
{
/* Discard the key we created and return the found NSM Client */
free_nsm_client(pkey);
if(isFullDebug(COMPONENT_STATE))
{
char str[HASHTABLE_DISPLAY_STRLEN];
display_nsm_client(pclient, str);
LogFullDebug(COMPONENT_STATE,
"Found NSM Client {%s}",
str);
}
if(care == CARE_MONITOR)
if(!nsm_monitor(pclient))
{
dec_nsm_client_ref(pclient);
return NULL;
}
return pclient;
}
pclient = (state_nsm_client_t *)Mem_Alloc(sizeof(*pkey));
if(pclient == NULL)
{
free_nsm_client(pkey);
return NULL;
}
/* Copy everything over */
*pclient = *pkey;
pclient->ssc_nlm_caller_name = Mem_Alloc(pkey->ssc_nlm_caller_name_len + 1);
if(pclient->ssc_nlm_caller_name == NULL)
{
/* Discard the key and created client */
free_nsm_client(pkey);
free_nsm_client(pclient);
return NULL;
}
memcpy(pclient->ssc_nlm_caller_name,
pkey->ssc_nlm_caller_name,
pclient->ssc_nlm_caller_name_len);
pclient->ssc_nlm_caller_name[pclient->ssc_nlm_caller_name_len] = '\0';
init_glist(&pclient->ssc_lock_list);
if(isFullDebug(COMPONENT_STATE))
{
char str[HASHTABLE_DISPLAY_STRLEN];
display_nsm_client(pclient, str);
LogFullDebug(COMPONENT_STATE,
"New NSM Client {%s}", str);
}
if(pthread_mutex_init(&pclient->ssc_mutex, NULL) == -1)
{
/* Mutex initialization failed, free the key and created client */
free_nsm_client(pkey);
free_nsm_client(pclient);
return NULL;
}
if(nsm_client_Set(pkey, pclient) == 1)
{
if(isFullDebug(COMPONENT_STATE))
{
char str[HASHTABLE_DISPLAY_STRLEN];
display_nsm_client(pclient, str);
LogFullDebug(COMPONENT_STATE,
"Set NSM Client {%s}",
str);
}
if(care != CARE_MONITOR || nsm_monitor(pclient))
return pclient;
dec_nsm_client_ref(pclient);
return NULL;
}
free_nsm_client(pkey);
free_nsm_client(pclient);
return NULL;
}
/**
* @brief Get an NSM client
*
* @param[in] care Care status
* @param[in] xprt RPC transport
* @param[in] caller_name Caller name
*
* @return NSM client or NULL.
*/
state_nsm_client_t *get_nsm_client(care_t care, SVCXPRT *xprt,
char *caller_name)
{
state_nsm_client_t key;
state_nsm_client_t *pclient;
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
struct hash_latch latch;
hash_error_t rc;
struct gsh_buffdesc buffkey;
struct gsh_buffdesc buffval;
if (caller_name == NULL)
return NULL;
memset(&key, 0, sizeof(key));
if (nfs_param.core_param.nsm_use_caller_name) {
key.ssc_nlm_caller_name_len = strlen(caller_name);
if (key.ssc_nlm_caller_name_len > LM_MAXSTRLEN)
return NULL;
key.ssc_nlm_caller_name = caller_name;
} else if (op_ctx->client == NULL) {
LogCrit(COMPONENT_STATE,
"No gsh_client for caller_name %s", caller_name);
return NULL;
} else {
key.ssc_nlm_caller_name = op_ctx->client->hostaddr_str;
key.ssc_nlm_caller_name_len = strlen(key.ssc_nlm_caller_name);
key.ssc_client = op_ctx->client;
}
if (isFullDebug(COMPONENT_STATE)) {
display_nsm_client(&dspbuf, &key);
LogFullDebug(COMPONENT_STATE, "Find {%s}", str);
}
buffkey.addr = &key;
buffkey.len = sizeof(key);
rc = hashtable_getlatch(ht_nsm_client, &buffkey, &buffval, true,
&latch);
/* If we found it, return it */
if (rc == HASHTABLE_SUCCESS) {
pclient = buffval.addr;
/* Return the found NSM Client */
if (isFullDebug(COMPONENT_STATE)) {
display_nsm_client(&dspbuf, pclient);
LogFullDebug(COMPONENT_STATE, "Found {%s}", str);
}
/* Increment refcount under hash latch.
* This prevents dec ref from removing this entry from hash
* if a race occurs.
*/
inc_nsm_client_ref(pclient);
hashtable_releaselatched(ht_nsm_client, &latch);
if (care == CARE_MONITOR && !nsm_monitor(pclient)) {
dec_nsm_client_ref(pclient);
pclient = NULL;
}
return pclient;
}
/* An error occurred, return NULL */
if (rc != HASHTABLE_ERROR_NO_SUCH_KEY) {
display_nsm_client(&dspbuf, &key);
LogCrit(COMPONENT_STATE, "Error %s, could not find {%s}",
hash_table_err_to_str(rc), str);
return NULL;
}
/* Not found, but we don't care, return NULL */
if (care == CARE_NOT) {
/* Return the found NSM Client */
if (isFullDebug(COMPONENT_STATE)) {
display_nsm_client(&dspbuf, &key);
LogFullDebug(COMPONENT_STATE, "Ignoring {%s}", str);
}
hashtable_releaselatched(ht_nsm_client, &latch);
return NULL;
}
pclient = gsh_malloc(sizeof(*pclient));
if (pclient == NULL) {
display_nsm_client(&dspbuf, &key);
LogCrit(COMPONENT_STATE, "No memory for {%s}", str);
return NULL;
}
/* Copy everything over */
memcpy(pclient, &key, sizeof(key));
PTHREAD_MUTEX_init(&pclient->ssc_mutex, NULL);
pclient->ssc_nlm_caller_name = gsh_strdup(key.ssc_nlm_caller_name);
if (pclient->ssc_nlm_caller_name == NULL) {
/* Discard the created client */
PTHREAD_MUTEX_destroy(&pclient->ssc_mutex);
free_nsm_client(pclient);
return NULL;
}
glist_init(&pclient->ssc_lock_list);
glist_init(&pclient->ssc_share_list);
pclient->ssc_refcount = 1;
if (op_ctx->client != NULL) {
pclient->ssc_client = op_ctx->client;
inc_gsh_client_refcount(op_ctx->client);
}
if (isFullDebug(COMPONENT_STATE)) {
display_nsm_client(&dspbuf, pclient);
LogFullDebug(COMPONENT_STATE, "New {%s}", str);
}
buffkey.addr = pclient;
buffkey.len = sizeof(*pclient);
buffval.addr = pclient;
buffval.len = sizeof(*pclient);
rc = hashtable_setlatched(ht_nsm_client, &buffval, &buffval, &latch,
false, NULL, NULL);
/* An error occurred, return NULL */
if (rc != HASHTABLE_SUCCESS) {
display_nsm_client(&dspbuf, pclient);
LogCrit(COMPONENT_STATE, "Error %s, inserting {%s}",
hash_table_err_to_str(rc), str);
PTHREAD_MUTEX_destroy(&pclient->ssc_mutex);
free_nsm_client(pclient);
return NULL;
}
if (care != CARE_MONITOR || nsm_monitor(pclient))
return pclient;
/* Failed to monitor, release client reference
* and almost certainly remove it from the hash table.
*/
dec_nsm_client_ref(pclient);
return NULL;
}
/**
* @brief Relinquish a reference on an NSM client
*
* @param[in] client The client to release
*/
void dec_nsm_client_ref(state_nsm_client_t *client)
{
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
bool str_valid = false;
struct hash_latch latch;
hash_error_t rc;
struct gsh_buffdesc buffkey;
struct gsh_buffdesc old_value;
struct gsh_buffdesc old_key;
int32_t refcount;
if (isDebug(COMPONENT_STATE)) {
display_nsm_client(&dspbuf, client);
str_valid = true;
}
refcount = atomic_dec_int32_t(&client->ssc_refcount);
if (refcount > 0) {
if (str_valid)
LogFullDebug(COMPONENT_STATE,
"Decrement refcount now=%" PRId32 " {%s}",
refcount, str);
return;
}
if (str_valid)
LogFullDebug(COMPONENT_STATE, "Try to remove {%s}", str);
buffkey.addr = client;
buffkey.len = sizeof(*client);
/* Get the hash table entry and hold latch */
rc = hashtable_getlatch(ht_nsm_client, &buffkey, &old_value, true,
&latch);
if (rc != HASHTABLE_SUCCESS) {
if (rc == HASHTABLE_ERROR_NO_SUCH_KEY)
hashtable_releaselatched(ht_nsm_client, &latch);
if (!str_valid)
display_nsm_client(&dspbuf, client);
LogCrit(COMPONENT_STATE, "Error %s, could not find {%s}",
hash_table_err_to_str(rc), str);
return;
}
refcount = atomic_fetch_int32_t(&client->ssc_refcount);
if (refcount > 0) {
if (str_valid)
LogDebug(COMPONENT_STATE,
"Did not release refcount now=%"PRId32" {%s}",
refcount, str);
hashtable_releaselatched(ht_nsm_client, &latch);
return;
}
/* use the key to delete the entry */
rc = hashtable_deletelatched(ht_nsm_client, &buffkey, &latch, &old_key,
&old_value);
if (rc != HASHTABLE_SUCCESS) {
if (rc == HASHTABLE_ERROR_NO_SUCH_KEY)
hashtable_releaselatched(ht_nsm_client, &latch);
if (!str_valid)
display_nsm_client(&dspbuf, client);
LogCrit(COMPONENT_STATE, "Error %s, could not remove {%s}",
hash_table_err_to_str(rc), str);
return;
}
LogFullDebug(COMPONENT_STATE, "Free {%s}", str);
nsm_unmonitor(old_value.addr);
free_nsm_client(old_value.addr);
}
