/**
*
* HashTable_Del: Remove a (key,val) couple from the hashtable.
*
* Remove a (key,val) couple from the hashtable. The parameter buffkey contains the key which describes the object to be removed
* from the hash table.
*
* @param ht the hashtable to be used.
* @param buffkey a pointeur to an object of type hash_buffer_t which describe the key location in memory.
* @param pusedbuffkeydata the key data buffer that was associated with this entry. Not considered if equal to NULL.
*
* @return HASHTABLE_SUCCESS if successfull\n.
* @return HASHTABLE_ERROR_NO_SUCH_KEY is the key was not found.
*
* @see HashTable_Set
* @see HashTable_Init
* @see HashTable_Get
*/
int HashTable_Del(hash_table_t * ht, hash_buffer_t * buffkey,
hash_buffer_t * p_usedbuffkey, hash_buffer_t * p_usedbuffdata)
{
unsigned int hashval;
struct rbt_node *pn;
int rbt_value = 0;
struct rbt_head *tete_rbt;
hash_data_t *pdata = NULL;
int rc = 0;
/* Sanity check */
if(ht == NULL || buffkey == NULL)
return HASHTABLE_ERROR_INVALID_ARGUMENT;
/* Find the RB Tree to be processed */
hashval = (*(ht->parameter.hash_func_key)) (&ht->parameter, buffkey);
/* Find the entry to be deleted */
rbt_value = (*(ht->parameter.hash_func_rbt)) (&ht->parameter, buffkey);
/* acquire mutex */
P_w(&(ht->array_lock[hashval]));
/* We didn't find anything */
if((rc = Key_Locate(ht, buffkey, hashval, rbt_value, &pn)) != HASHTABLE_SUCCESS)
{
ht->stat_dynamic[hashval].notfound.nb_del += 1;
V_w(&(ht->array_lock[hashval]));
return rc;
}
pdata = (hash_data_t *) RBT_OPAQ(pn);
/* Return the key buffer back to the end user if pusedbuffkey isn't NULL */
if(p_usedbuffkey != NULL)
*p_usedbuffkey = pdata->buffkey;
if(p_usedbuffdata != NULL)
*p_usedbuffdata = pdata->buffval;
/* Key was found */
tete_rbt = &(ht->array_rbt[hashval]);
RBT_UNLINK(tete_rbt, pn);
/* the key was located, the deletion is done */
ht->stat_dynamic[hashval].nb_entries -= 1;
/* put back the pdata buffer to pool */
RELEASE_PREALLOC(pdata, ht->pdata_prealloc[hashval], next_alloc);
/* Put the node back in the table of preallocated nodes (it could be reused) */
RELEASE_PREALLOC(pn, ht->node_prealloc[hashval], next);
ht->stat_dynamic[hashval].ok.nb_del += 1;
/* release mutex */
V_w(&(ht->array_lock[hashval]));
return HASHTABLE_SUCCESS;
} /* HashTable_Del */
/**
* @brief Remove and free all (key,val) couples from the hash store
*
* This function removes all (key,val) couples from the hashtable and
* frees the stored data using the supplied function
*
* @param[in,out] ht The hashtable to be cleared of all entries
* @param[in] free_func The function with which to free the contents
* of each entry
*
* @return HASHTABLE_SUCCESS or errors
*/
hash_error_t
hashtable_delall(struct hash_table *ht,
int (*free_func)(struct gsh_buffdesc,
struct gsh_buffdesc))
{
/* Successive partition numbers */
uint32_t index = 0;
for (index = 0; index < ht->parameter.index_size; index++) {
/* The root of each successive partition */
struct rbt_head *root = &ht->partitions[index].rbt;
/* Pointer to node in tree for removal */
struct rbt_node *cursor = NULL;
PTHREAD_RWLOCK_wrlock(&ht->partitions[index].lock);
/* Continue until there are no more entries in the red-black
tree */
while ((cursor = RBT_LEFTMOST(root)) != NULL) {
/* Pointer to the key and value descriptors
for each successive entry */
struct hash_data *data = NULL;
/* Aliased poitner to node, for freeing
buffers after removal from tree */
struct rbt_node *holder = cursor;
/* Buffer descriptor for key, as stored */
struct gsh_buffdesc key;
/* Buffer descriptor for value, as stored */
struct gsh_buffdesc val;
/* Return code from the free function. Zero
on failure */
int rc = 0;
RBT_UNLINK(root, cursor);
data = RBT_OPAQ(holder);
key = data->key;
val = data->val;
pool_free(ht->data_pool, data);
pool_free(ht->node_pool, holder);
--ht->partitions[index].count;
rc = free_func(key, val);
if (rc == 0) {
PTHREAD_RWLOCK_unlock(&ht->partitions[index].
lock);
return HASHTABLE_ERROR_DELALL_FAIL;
}
}
PTHREAD_RWLOCK_unlock(&ht->partitions[index].lock);
}
return HASHTABLE_SUCCESS;
}
/**
*
* Key_Locate: Locate a buffer key in the hash table, as a rbt node.
*
* This function is for internal use only
*
* @param ht the hashtable to be used.
* @param buffkey a pointeur to an object of type hash_buffer_t which describe the key location in memory.
* @param hashval hash value associated with the key (in order to avoid computing it a second time)
* @param rbt_value rbt value associated with the key (in order to avoid computing it a second time)
* @param ppnode if successfull,will point to the pointer to the rbt node to be used
*
* @return HASHTABLE_SUCCESS if successfull\n.
* @return HASHTABLE_NO_SUCH_KEY if key was not found
*
*/
static int Key_Locate(hash_table_t * ht, hash_buffer_t * buffkey, unsigned int hashval,
int rbt_value, struct rbt_node **ppnode)
{
struct rbt_head *tete_rbt;
hash_data_t *pdata = NULL;
struct rbt_node *pn;
int found = 0;
/* Sanity check */
if(ht == NULL || buffkey == NULL || ppnode == NULL)
return HASHTABLE_ERROR_INVALID_ARGUMENT;
/* Find the head of the rbt */
tete_rbt = &(ht->array_rbt[hashval]);
/* I get the node with this value that is located on the left (first with this value in the rbtree) */
RBT_FIND_LEFT(tete_rbt, pn, rbt_value);
/* Find was successfull ? */
if(pn == NULL)
return HASHTABLE_ERROR_NO_SUCH_KEY;
/* For each entry with this value, compare the key value */
while((pn != 0) && (RBT_VALUE(pn) == rbt_value))
{
pdata = (hash_data_t *) RBT_OPAQ(pn);
/* Verify the key value : this function returns 0 if key are indentical */
if(!ht->parameter.compare_key(buffkey, &(pdata->buffkey)))
{
found = 1;
break; /* exit the while loop */
}
RBT_INCREMENT(pn);
} /* while */
/* We didn't find anything */
if(!found)
return HASHTABLE_ERROR_NO_SUCH_KEY;
/* Key was found */
*ppnode = pn;
return HASHTABLE_SUCCESS;
} /* Key_Locate */
int HashTable_Get(hash_table_t * ht, hash_buffer_t * buffkey, hash_buffer_t * buffval)
{
unsigned int hashval;
struct rbt_node *pn;
struct rbt_head *tete_rbt;
hash_data_t *pdata = NULL;
int rbt_value = 0;
int rc = 0;
/* Sanity check */
if(ht == NULL || buffkey == NULL || buffval == NULL)
return HASHTABLE_ERROR_INVALID_ARGUMENT;
/* Find the RB Tree to be processed */
hashval = (*(ht->parameter.hash_func_key)) (&ht->parameter, buffkey);
tete_rbt = &(ht->array_rbt[hashval]);
/* Seek into the RB Tree */
rbt_value = (*(ht->parameter.hash_func_rbt)) (&ht->parameter, buffkey);
/* Acquire mutex */
P_r(&(ht->array_lock[hashval]));
/* I get the node with this value that is located on the left (first with this value in the rbtree) */
if((rc = Key_Locate(ht, buffkey, hashval, rbt_value, &pn)) != HASHTABLE_SUCCESS)
{
ht->stat_dynamic[hashval].notfound.nb_get += 1;
V_r(&(ht->array_lock[hashval]));
return rc;
}
/* Key was found */
pdata = (hash_data_t *) RBT_OPAQ(pn);
buffval->pdata = pdata->buffval.pdata;
buffval->len = pdata->buffval.len;
ht->stat_dynamic[hashval].ok.nb_get += 1;
/* Release mutex */
V_r(&(ht->array_lock[hashval]));
return HASHTABLE_SUCCESS;
} /* HashTable_Get */
static bool nfs_rpc_cbsim_get_v40_client_ids(DBusMessageIter *args,
DBusMessage *reply)
{
uint32_t i;
hash_table_t *ht = ht_confirmed_client_id;
struct rbt_head *head_rbt;
struct hash_data *pdata = NULL;
struct rbt_node *pn;
nfs_client_id_t *pclientid;
uint64_t clientid;
DBusMessageIter iter, sub_iter;
struct timespec ts;
/* create a reply from the message */
now(&ts);
dbus_message_iter_init_append(reply, &iter);
dbus_append_timestamp(&iter, &ts);
dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
DBUS_TYPE_UINT64_AS_STRING, &sub_iter);
/* For each bucket of the hashtable */
for (i = 0; i < ht->parameter.index_size; i++) {
head_rbt = &(ht->partitions[i].rbt);
/* acquire mutex */
PTHREAD_RWLOCK_wrlock(&(ht->partitions[i].lock));
/* go through all entries in the red-black-tree */
RBT_LOOP(head_rbt, pn) {
pdata = RBT_OPAQ(pn);
pclientid = pdata->val.addr;
clientid = pclientid->cid_clientid;
dbus_message_iter_append_basic(&sub_iter,
DBUS_TYPE_UINT64,
&clientid);
RBT_INCREMENT(pn);
}
PTHREAD_RWLOCK_unlock(&(ht->partitions[i].lock));
}
static DBusHandlerResult
nfs_rpc_cbsim_get_client_ids(DBusConnection *conn, DBusMessage *msg,
void *user_data)
{
DBusMessage* reply;
static uint32_t i, serial = 1;
hash_table_t *ht = ht_confirmed_client_id;
struct rbt_head *head_rbt;
hash_data_t *pdata = NULL;
struct rbt_node *pn;
nfs_client_id_t *pclientid;
uint64_t clientid;
DBusMessageIter iter, sub_iter;
/* create a reply from the message */
reply = dbus_message_new_method_return(msg);
dbus_message_iter_init_append(reply, &iter);
dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
DBUS_TYPE_UINT64_AS_STRING, &sub_iter);
/* For each bucket of the hashtable */
for(i = 0; i < ht->parameter.index_size; i++) {
head_rbt = &(ht->partitions[i].rbt);
/* acquire mutex */
pthread_rwlock_wrlock(&(ht->partitions[i].lock));
/* go through all entries in the red-black-tree*/
RBT_LOOP(head_rbt, pn) {
pdata = RBT_OPAQ(pn);
pclientid =
(nfs_client_id_t *)pdata->buffval.pdata;
clientid = pclientid->cid_clientid;
dbus_message_iter_append_basic(&sub_iter, DBUS_TYPE_UINT64, &clientid);
RBT_INCREMENT(pn);
}
pthread_rwlock_unlock(&(ht->partitions[i].lock));
}
void hashtable_deletelatched(struct hash_table *ht,
const struct gsh_buffdesc *key,
struct hash_latch *latch,
struct gsh_buffdesc *stored_key,
struct gsh_buffdesc *stored_val)
{
/* The pair of buffer descriptors comprising the stored entry */
struct hash_data *data = NULL;
/* Its partition */
struct hash_partition *partition = &ht->partitions[latch->index];
if (!latch->locator)
return;
data = RBT_OPAQ(latch->locator);
if (isDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component)) {
char dispkey[HASHTABLE_DISPLAY_STRLEN];
char dispval[HASHTABLE_DISPLAY_STRLEN];
if (ht->parameter.key_to_str != NULL)
ht->parameter.key_to_str(&data->key, dispkey);
else
dispkey[0] = '\0';
if (ht->parameter.val_to_str != NULL)
ht->parameter.val_to_str(&data->val, dispval);
else
dispval[0] = '\0';
LogFullDebug(ht->parameter.ht_log_component,
"Delete %s Key=%p {%s} Value=%p {%s} index=%"
PRIu32 " rbt_hash=%" PRIu64 " was removed",
ht->parameter.ht_name, data->key.addr, dispkey,
data->val.addr, dispval, latch->index,
latch->rbt_hash);
}
if (stored_key)
*stored_key = data->key;
if (stored_val)
*stored_val = data->val;
/* Clear cache */
if (partition->cache) {
uint32_t offset = cache_offsetof(ht, latch->rbt_hash);
struct rbt_node *cnode = partition->cache[offset];
if (cnode) {
#if COMPARE_BEFORE_CLEAR_CACHE
struct hash_data *data1 = RBT_OPAQ(cnode);
struct hash_data *data2 = RBT_OPAQ(latch->locator);
if (ht->parameter.
compare_key(&(data1->key), &(data2->key))
== 0) {
LogFullDebug(COMPONENT_HASHTABLE_CACHE,
"hash clear index %d slot %" PRIu64
latch->index, offset);
partition->cache[offset] = NULL;
}
#else
LogFullDebug(COMPONENT_HASHTABLE_CACHE,
"hash clear slot %d", offset);
partition->cache[offset] = NULL;
#endif
}
}
/* Now remove the entry */
RBT_UNLINK(&partition->rbt, latch->locator);
pool_free(ht->data_pool, data);
pool_free(ht->node_pool, latch->locator);
--ht->partitions[latch->index].count;
}
hash_error_t
hashtable_setlatched(struct hash_table *ht,
struct gsh_buffdesc *key,
struct gsh_buffdesc *val,
struct hash_latch *latch, int overwrite,
struct gsh_buffdesc *stored_key,
struct gsh_buffdesc *stored_val)
{
/* Stored error return */
hash_error_t rc = HASHTABLE_SUCCESS;
/* The pair of buffer descriptors locating both key and value
for this object, what actually gets stored. */
struct hash_data *descriptors = NULL;
/* Node giving the location to insert new node */
struct rbt_node *locator = NULL;
/* New node for the case of non-overwrite */
struct rbt_node *mutator = NULL;
if (isDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component)) {
char dispkey[HASHTABLE_DISPLAY_STRLEN];
char dispval[HASHTABLE_DISPLAY_STRLEN];
if (ht->parameter.key_to_str != NULL)
ht->parameter.key_to_str(key, dispkey);
else
dispkey[0] = '\0';
if (ht->parameter.val_to_str != NULL)
ht->parameter.val_to_str(val, dispval);
else
dispval[0] = '\0';
LogFullDebug(ht->parameter.ht_log_component,
"Set %s Key=%p {%s} Value=%p {%s} index=%" PRIu32
" rbt_hash=%" PRIu64, ht->parameter.ht_name,
key->addr, dispkey, val->addr, dispval,
latch->index, latch->rbt_hash);
}
/* In the case of collision */
if (latch->locator) {
if (!overwrite) {
rc = HASHTABLE_ERROR_KEY_ALREADY_EXISTS;
goto out;
}
descriptors = RBT_OPAQ(latch->locator);
if (isDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component)) {
char dispkey[HASHTABLE_DISPLAY_STRLEN];
char dispval[HASHTABLE_DISPLAY_STRLEN];
if (ht->parameter.key_to_str != NULL)
ht->parameter.key_to_str(&descriptors->key,
dispkey);
else
dispkey[0] = '\0';
if (ht->parameter.val_to_str != NULL)
ht->parameter.val_to_str(&descriptors->val,
dispval);
else
dispval[0] = '\0';
LogFullDebug(ht->parameter.ht_log_component,
"Set %s Key=%p {%s} Value=%p {%s} index=%"
PRIu32" rbt_hash=%"PRIu64" was replaced",
ht->parameter.ht_name,
descriptors->key.addr, dispkey,
descriptors->val.addr, dispval,
latch->index, latch->rbt_hash);
}
if (stored_key)
*stored_key = descriptors->key;
if (stored_val)
*stored_val = descriptors->val;
descriptors->key = *key;
descriptors->val = *val;
rc = HASHTABLE_OVERWRITTEN;
goto out;
}
/* We have no collision, so go about creating and inserting a new
node. */
RBT_FIND(&ht->partitions[latch->index].rbt, locator, latch->rbt_hash);
mutator = pool_alloc(ht->node_pool);
descriptors = pool_alloc(ht->data_pool);
RBT_OPAQ(mutator) = descriptors;
RBT_VALUE(mutator) = latch->rbt_hash;
RBT_INSERT(&ht->partitions[latch->index].rbt, mutator, locator);
descriptors->key.addr = key->addr;
descriptors->key.len = key->len;
descriptors->val.addr = val->addr;
descriptors->val.len = val->len;
/* Only in the non-overwrite case */
++ht->partitions[latch->index].count;
rc = HASHTABLE_SUCCESS;
out:
hashtable_releaselatched(ht, latch);
if (rc != HASHTABLE_SUCCESS && isDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component))
LogFullDebug(ht->parameter.ht_log_component,
"Set %s returning failure %s",
ht->parameter.ht_name, hash_table_err_to_str(rc));
return rc;
}
/**
* @brief Look up an entry, latching the table
*
* This function looks up an entry in the hash table and latches the
* partition in which that entry would belong in preparation for other
* activities. This function is a primitive and is intended more for
* use building other access functions than for client code itself.
*
* @brief[in] ht The hash table to search
* @brief[in] key The key for which to search
* @brief[out] val The value found
* @brief[in] may_write This must be true if the followup call might
* mutate the hash table (set or delete)
* @brief[out] latch Opaque structure holding information on the
* table.
*
* @retval HASHTABLE_SUCCESS The entry was found, the table is
* latched.
* @retval HASHTABLE_ERROR_NOT_FOUND The entry was not found, the
* table is latched.
* @retval Others, failure, the table is not latched.
*/
hash_error_t
hashtable_getlatch(struct hash_table *ht,
const struct gsh_buffdesc *key,
struct gsh_buffdesc *val, bool may_write,
struct hash_latch *latch)
{
/* The index specifying the partition to search */
uint32_t index = 0;
/* The node found for the key */
struct rbt_node *locator = NULL;
/* The buffer descritpros for the key and value for the found entry */
struct hash_data *data = NULL;
/* The hash value to be searched for within the Red-Black tree */
uint64_t rbt_hash = 0;
/* Stored error return */
hash_error_t rc = HASHTABLE_SUCCESS;
/* This combination of options makes no sense ever */
assert(!(may_write && !latch));
rc = compute(ht, key, &index, &rbt_hash);
if (rc != HASHTABLE_SUCCESS)
return rc;
/* Acquire mutex */
if (may_write)
PTHREAD_RWLOCK_wrlock(&(ht->partitions[index].lock));
else
PTHREAD_RWLOCK_rdlock(&(ht->partitions[index].lock));
rc = key_locate(ht, key, index, rbt_hash, &locator);
if (rc == HASHTABLE_SUCCESS) {
/* Key was found */
data = RBT_OPAQ(locator);
if (val) {
val->addr = data->val.addr;
val->len = data->val.len;
}
if (isDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component)) {
char dispval[HASHTABLE_DISPLAY_STRLEN];
if (ht->parameter.val_to_str != NULL)
ht->parameter.val_to_str(&data->val, dispval);
else
dispval[0] = '\0';
LogFullDebug(ht->parameter.ht_log_component,
"Get %s returning Value=%p {%s}",
ht->parameter.ht_name, data->val.addr,
dispval);
}
}
if (((rc == HASHTABLE_SUCCESS) || (rc == HASHTABLE_ERROR_NO_SUCH_KEY))
&& (latch != NULL)) {
latch->index = index;
latch->rbt_hash = rbt_hash;
latch->locator = locator;
} else {
PTHREAD_RWLOCK_unlock(&ht->partitions[index].lock);
}
if (rc != HASHTABLE_SUCCESS && isDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component))
LogFullDebug(ht->parameter.ht_log_component,
"Get %s returning failure %s",
ht->parameter.ht_name, hash_table_err_to_str(rc));
return rc;
}
/**
* @brief Locate a key within a partition
*
* This function traverses the red-black tree within a hash table
* partition and returns, if one exists, a pointer to a node matching
* the supplied key.
*
* @param[in] ht The hashtable to be used
* @param[in] key The key to look up
* @param[in] index Index into RBT array
* @param[in] rbthash Hash in red-black tree
* @param[out] node On success, the found node, NULL otherwise
*
* @retval HASHTABLE_SUCCESS if successfull
* @retval HASHTABLE_NO_SUCH_KEY if key was not found
*/
static hash_error_t
key_locate(struct hash_table *ht, const struct gsh_buffdesc *key,
uint32_t index, uint64_t rbthash, struct rbt_node **node)
{
/* The current partition */
struct hash_partition *partition = &(ht->partitions[index]);
/* The root of the red black tree matching this index */
struct rbt_head *root = NULL;
/* A pair of buffer descriptors locating key and value for this
entry */
struct hash_data *data = NULL;
/* The node in the red-black tree currently being traversed */
struct rbt_node *cursor = NULL;
/* true if we have located the key */
int found = false;
*node = NULL;
if (partition->cache) {
void **cache_slot = (void **)
&(partition->cache[cache_offsetof(ht, rbthash)]);
cursor = atomic_fetch_voidptr(cache_slot);
LogFullDebug(COMPONENT_HASHTABLE_CACHE,
"hash %s index %" PRIu32 " slot %d",
(cursor) ? "hit" : "miss", index,
cache_offsetof(ht, rbthash));
if (cursor) {
data = RBT_OPAQ(cursor);
if (ht->parameter.
compare_key((struct gsh_buffdesc *)key,
&(data->key)) == 0) {
goto out;
}
}
}
root = &(ht->partitions[index].rbt);
/* The lefmost occurrence of the value is the one from which we
may start iteration to visit all nodes containing a value. */
RBT_FIND_LEFT(root, cursor, rbthash);
if (cursor == NULL) {
if (isFullDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component))
LogFullDebug(ht->parameter.ht_log_component,
"Key not found: rbthash = %" PRIu64,
rbthash);
return HASHTABLE_ERROR_NO_SUCH_KEY;
}
while ((cursor != NULL) && (RBT_VALUE(cursor) == rbthash)) {
data = RBT_OPAQ(cursor);
if (ht->parameter.
compare_key((struct gsh_buffdesc *)key,
&(data->key)) == 0) {
if (partition->cache) {
void **cache_slot = (void **)
&(partition->
cache[cache_offsetof(ht, rbthash)]);
atomic_store_voidptr(cache_slot, cursor);
}
found = true;
break;
}
RBT_INCREMENT(cursor);
}
if (!found) {
if (isFullDebug(COMPONENT_HASHTABLE)
&& isFullDebug(ht->parameter.ht_log_component))
LogFullDebug(ht->parameter.ht_log_component,
"Matching hash found, but no matching key.");
return HASHTABLE_ERROR_NO_SUCH_KEY;
}
out:
*node = cursor;
return HASHTABLE_SUCCESS;
}
/**
*
* HashTable_Test_And_Set: set a pair (key,value) into the Hash Table.
*
* Set a (key,val) couple in the hashtable .
*
* @param ht the hashtable to be used.
* @param buffkey a pointeur to an object of type hash_buffer_t which describe the key location in memory.
* @param buffval a pointeur to an object of type hash_buffer_t which describe the value location in memory.
* @param how a switch to tell if the entry is to be tested or overwritten or not
*
* @return HASHTABLE_SUCCESS if successfull\n.
* @return HASHTABLE_INSERT_MALLOC_ERROR if an error occured during the insertion process.
*
* @see HashTable_Get
* @see HashTable_Init
* @see HashTable_Del
*/
int HashTable_Test_And_Set(hash_table_t * ht, hash_buffer_t * buffkey,
hash_buffer_t * buffval, hashtable_set_how_t how)
{
unsigned int hashval = 0;
int rbt_value = 0;
struct rbt_head *tete_rbt = NULL;
struct rbt_node *qn = NULL;
struct rbt_node *pn = NULL;
hash_data_t *pdata = NULL;
/* Sanity check */
if(ht == NULL)
return HASHTABLE_ERROR_INVALID_ARGUMENT;
else if(buffkey == NULL)
return HASHTABLE_ERROR_INVALID_ARGUMENT;
else if(buffval == NULL)
return HASHTABLE_ERROR_INVALID_ARGUMENT;
/* Find the RB Tree to be used */
hashval = (*(ht->parameter.hash_func_key)) (&ht->parameter, buffkey);
tete_rbt = &(ht->array_rbt[hashval]);
rbt_value = (*(ht->parameter.hash_func_rbt)) (&ht->parameter, buffkey);
LogFullDebug(COMPONENT_HASHTABLE,"Key = %p Value = %p hashval = %u rbt_value = %x\n", buffkey->pdata,
buffval->pdata, hashval, rbt_value);
/* acquire mutex for protection */
P_w(&(ht->array_lock[hashval]));
if(Key_Locate(ht, buffkey, hashval, rbt_value, &pn) == HASHTABLE_SUCCESS)
{
/* An entry of that key already exists */
if(how == HASHTABLE_SET_HOW_TEST_ONLY)
{
ht->stat_dynamic[hashval].ok.nb_test += 1;
V_w(&(ht->array_lock[hashval]));
return HASHTABLE_SUCCESS;
}
if(how == HASHTABLE_SET_HOW_SET_NO_OVERWRITE)
{
ht->stat_dynamic[hashval].err.nb_test += 1;
V_w(&(ht->array_lock[hashval]));
return HASHTABLE_ERROR_KEY_ALREADY_EXISTS;
}
qn = pn;
pdata = RBT_OPAQ(qn);
LogFullDebug(COMPONENT_HASHTABLE,"Ecrasement d'une ancienne entree (k=%p,v=%p)\n", buffkey->pdata,
buffval->pdata);
}
else
{
/* No entry of that key, add it to the trees */
if(how == HASHTABLE_SET_HOW_TEST_ONLY)
{
ht->stat_dynamic[hashval].notfound.nb_test += 1;
V_w(&(ht->array_lock[hashval]));
return HASHTABLE_ERROR_NO_SUCH_KEY;
}
/* Insert a new node in the table */
RBT_FIND(tete_rbt, pn, rbt_value);
#ifdef _DEBUG_MEMLEAKS
/* For debugging memory leaks */
BuddySetDebugLabel("rbt_node_t");
#endif
/* This entry does not exist, create it */
/* First get a new entry in the preallocated node array */
GET_PREALLOC(qn, ht->node_prealloc[hashval], ht->parameter.nb_node_prealloc,
rbt_node_t, next);
if(qn == NULL)
{
ht->stat_dynamic[hashval].err.nb_set += 1;
V_w(&(ht->array_lock[hashval]));
return HASHTABLE_INSERT_MALLOC_ERROR;
}
#ifdef _DEBUG_MEMLEAKS
/* For debugging memory leaks */
BuddySetDebugLabel("hash_data_t");
#endif
GET_PREALLOC(pdata, ht->pdata_prealloc[hashval], ht->parameter.nb_node_prealloc,
hash_data_t, next_alloc);
if(pdata == NULL)
{
ht->stat_dynamic[hashval].err.nb_set += 1;
V_w(&(ht->array_lock[hashval]));
return HASHTABLE_INSERT_MALLOC_ERROR;
}
#ifdef _DEBUG_MEMLEAKS
/* For debugging memory leaks */
BuddySetDebugLabel("N/A");
#endif
RBT_OPAQ(qn) = pdata;
RBT_VALUE(qn) = rbt_value;
RBT_INSERT(tete_rbt, qn, pn);
LogFullDebug(COMPONENT_HASHTABLE,"Creation d'une nouvelle entree (k=%p,v=%p), qn=%p, pdata=%p\n",
buffkey->pdata, buffval->pdata, qn, RBT_OPAQ(qn));
}
pdata->buffval.pdata = buffval->pdata;
pdata->buffval.len = buffval->len;
pdata->buffkey.pdata = buffkey->pdata;
pdata->buffkey.len = buffkey->len;
ht->stat_dynamic[hashval].nb_entries += 1;
ht->stat_dynamic[hashval].ok.nb_set += 1;
/* Release mutex */
V_w(&(ht->array_lock[hashval]));
return HASHTABLE_SUCCESS;
} /* HashTable_Set */
static void reap_hash_table(hash_table_t * ht_reap)
{
struct rbt_head * head_rbt;
hash_data_t * pdata = NULL;
uint32_t i;
int v4, rc;
struct rbt_node * pn;
nfs_client_id_t * pclientid;
nfs_client_record_t * precord;
/* For each bucket of the requested hashtable */
for(i = 0; i < ht_reap->parameter.index_size; i++)
{
head_rbt = &ht_reap->partitions[i].rbt;
restart:
/* acquire mutex */
pthread_rwlock_wrlock(&ht_reap->partitions[i].lock);
/* go through all entries in the red-black-tree*/
RBT_LOOP(head_rbt, pn)
{
pdata = RBT_OPAQ(pn);
pclientid = (nfs_client_id_t *)pdata->buffval.pdata;
/*
* little hack: only want to reap v4 clients
* 4.1 initializess this field to '1'
*/
v4 = (pclientid->cid_create_session_sequence == 0);
P(pclientid->cid_mutex);
if(!valid_lease(pclientid) && v4)
{
inc_client_id_ref(pclientid);
/* Take a reference to the client record */
precord = pclientid->cid_client_record;
inc_client_record_ref(precord);
V(pclientid->cid_mutex);
pthread_rwlock_unlock(&ht_reap->partitions[i].lock);
if(isDebug(COMPONENT_CLIENTID))
{
char str[HASHTABLE_DISPLAY_STRLEN];
display_client_id_rec(pclientid, str);
LogFullDebug(COMPONENT_CLIENTID,
"Expire index %d %s",
i, str);
}
/* Take cr_mutex and expire clientid */
P(precord->cr_mutex);
rc = nfs_client_id_expire(pclientid);
V(precord->cr_mutex);
dec_client_id_ref(pclientid);
dec_client_record_ref(precord);
if(rc)
goto restart;
}
else
{
V(pclientid->cid_mutex);
}
RBT_INCREMENT(pn);
}
pthread_rwlock_unlock(&ht_reap->partitions[i].lock);
}
void *reaper_thread(void *unused)
{
hash_table_t *ht = ht_client_id;
struct rbt_head *head_rbt;
hash_data_t *pdata = NULL;
int i, v4;
struct rbt_node *pn;
nfs_client_id_t *clientp;
#ifndef _NO_BUDDY_SYSTEM
if((i = BuddyInit(&nfs_param.buddy_param_admin)) != BUDDY_SUCCESS) {
/* Failed init */
LogFatal(COMPONENT_MAIN,
"Memory manager could not be initialized");
}
LogInfo(COMPONENT_MAIN, "Memory manager successfully initialized");
#endif
SetNameFunction("reaper_thr");
while(1) {
/* Initial wait */
/* TODO: should this be configurable? */
/* sleep(nfs_param.core_param.reaper_delay); */
sleep(reaper_delay);
LogFullDebug(COMPONENT_MAIN,
"NFS reaper : now checking clients");
/* For each bucket of the hashtable */
for(i = 0; i < ht->parameter.index_size; i++) {
head_rbt = &(ht->array_rbt[i]);
restart:
/* acquire mutex */
P_w(&(ht->array_lock[i]));
/* go through all entries in the red-black-tree*/
RBT_LOOP(head_rbt, pn) {
pdata = RBT_OPAQ(pn);
clientp =
(nfs_client_id_t *)pdata->buffval.pdata;
/*
* little hack: only want to reap v4 clients
* 4.1 initializess this field to '1'
*/
v4 = (clientp->create_session_sequence == 0);
if (clientp->confirmed != EXPIRED_CLIENT_ID &&
nfs4_is_lease_expired(clientp) && v4) {
V_w(&(ht->array_lock[i]));
LogDebug(COMPONENT_MAIN,
"NFS reaper: expire client %s",
clientp->client_name);
nfs_client_id_expire(clientp);
goto restart;
}
if (clientp->confirmed == EXPIRED_CLIENT_ID) {
LogDebug(COMPONENT_MAIN,
"reaper: client %s already expired",
clientp->client_name);
}
RBT_INCREMENT(pn);
}
V_w(&(ht->array_lock[i]));
}
} /* while ( 1 ) */
static int reap_hash_table(hash_table_t *ht_reap)
{
struct rbt_head *head_rbt;
struct hash_data *addr = NULL;
uint32_t i;
int rc;
struct rbt_node *pn;
nfs_client_id_t *pclientid;
nfs_client_record_t *precord;
int count = 0;
struct req_op_context req_ctx;
struct user_cred creds;
/* We need a real context. Make all reaping done
* by root,root
*/
memset(&creds, 0, sizeof(creds));
req_ctx.creds = &creds;
/* For each bucket of the requested hashtable */
for (i = 0; i < ht_reap->parameter.index_size; i++) {
head_rbt = &ht_reap->partitions[i].rbt;
restart:
/* acquire mutex */
PTHREAD_RWLOCK_wrlock(&ht_reap->partitions[i].lock);
/* go through all entries in the red-black-tree */
RBT_LOOP(head_rbt, pn) {
addr = RBT_OPAQ(pn);
pclientid = addr->val.addr;
count++;
pthread_mutex_lock(&pclientid->cid_mutex);
if (!valid_lease(pclientid)) {
inc_client_id_ref(pclientid);
/* Take a reference to the client record */
precord = pclientid->cid_client_record;
inc_client_record_ref(precord);
pthread_mutex_unlock(&pclientid->cid_mutex);
PTHREAD_RWLOCK_unlock(&ht_reap->partitions[i].
lock);
if (isDebug(COMPONENT_CLIENTID)) {
char str[HASHTABLE_DISPLAY_STRLEN];
display_client_id_rec(pclientid, str);
LogFullDebug(COMPONENT_CLIENTID,
"Expire index %d %s", i,
str);
}
/* Take cr_mutex and expire clientid */
pthread_mutex_lock(&precord->cr_mutex);
/**
* @TODO This is incomplete! the context has to be filled in from
* somewhere
*/
memset(&req_ctx, 0, sizeof(req_ctx));
rc = nfs_client_id_expire(pclientid, &req_ctx);
pthread_mutex_unlock(&precord->cr_mutex);
dec_client_id_ref(pclientid);
dec_client_record_ref(precord);
if (rc)
goto restart;
} else {
pthread_mutex_unlock(&pclientid->cid_mutex);
}
RBT_INCREMENT(pn);
}
PTHREAD_RWLOCK_unlock(&ht_reap->partitions[i].lock);
}