static inline memcached_return_t memcached_send(memcached_st *ptr,
const char *master_key, size_t master_key_length,
const char *key, size_t key_length,
const char *value, size_t value_length,
time_t expiration,
uint32_t flags,
uint64_t cas,
memcached_storage_action_t verb)
{
bool to_write;
size_t write_length;
memcached_return_t rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
uint32_t server_key;
memcached_server_instance_st *instance;
WATCHPOINT_ASSERT(!(value == NULL && value_length > 0));
rc= memcached_validate_key_length(key_length, ptr->flags.binary_protocol);
unlikely (rc != MEMCACHED_SUCCESS)
return rc;
unlikely (memcached_server_count(ptr) == 0)
return MEMCACHED_NO_SERVERS;
if (ptr->flags.verify_key && (memcached_key_test((const char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
if (ptr->flags.binary_protocol)
{
return memcached_send_binary(ptr, master_key, master_key_length,
key, key_length,
value, value_length, expiration,
flags, cas, verb);
}
server_key= memcached_generate_hash(ptr, master_key, master_key_length);
instance= memcached_server_instance_fetch(ptr, server_key);
if (cas)
{
write_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s %.*s%.*s %u %llu %zu %llu%s\r\n",
storage_op_string(verb),
(int)ptr->prefix_key_length,
ptr->prefix_key,
(int)key_length, key, flags,
(unsigned long long)expiration, value_length,
(unsigned long long)cas,
(ptr->flags.no_reply) ? " noreply" : "");
}
else
{
char *buffer_ptr= buffer;
const char *command= storage_op_string(verb);
/* Copy in the command, no space needed, we handle that in the command function*/
memcpy(buffer_ptr, command, strlen(command));
/* Copy in the key prefix, switch to the buffer_ptr */
buffer_ptr= memcpy((buffer_ptr + strlen(command)), ptr->prefix_key, ptr->prefix_key_length);
/* Copy in the key, adjust point if a key prefix was used. */
buffer_ptr= memcpy(buffer_ptr + (ptr->prefix_key_length ? ptr->prefix_key_length : 0),
key, key_length);
buffer_ptr+= key_length;
buffer_ptr[0]= ' ';
buffer_ptr++;
write_length= (size_t)(buffer_ptr - buffer);
write_length+= (size_t) snprintf(buffer_ptr, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%u %llu %zu%s\r\n",
flags,
(unsigned long long)expiration, value_length,
ptr->flags.no_reply ? " noreply" : "");
}
if (ptr->flags.use_udp && ptr->flags.buffer_requests)
{
size_t cmd_size= write_length + value_length + 2;
if (cmd_size > MAX_UDP_DATAGRAM_LENGTH - UDP_DATAGRAM_HEADER_LENGTH)
return MEMCACHED_WRITE_FAILURE;
if (cmd_size + instance->write_buffer_offset > MAX_UDP_DATAGRAM_LENGTH)
memcached_io_write(instance, NULL, 0, true);
}
if (write_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
{
rc= MEMCACHED_WRITE_FAILURE;
goto error;
}
/* Send command header */
rc= memcached_do(instance, buffer, write_length, false);
if (rc != MEMCACHED_SUCCESS)
goto error;
/* Send command body */
if (memcached_io_write(instance, value, value_length, false) == -1)
{
rc= MEMCACHED_WRITE_FAILURE;
goto error;
}
if (ptr->flags.buffer_requests && verb == SET_OP)
{
to_write= false;
}
else
{
to_write= true;
}
if (memcached_io_write(instance, "\r\n", 2, to_write) == -1)
{
rc= MEMCACHED_WRITE_FAILURE;
goto error;
}
if (ptr->flags.no_reply)
return (to_write == false) ? MEMCACHED_BUFFERED : MEMCACHED_SUCCESS;
if (to_write == false)
return MEMCACHED_BUFFERED;
rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
if (rc == MEMCACHED_STORED)
return MEMCACHED_SUCCESS;
else
return rc;
error:
memcached_io_reset(instance);
return rc;
}
static inline memcached_return memcached_send(memcached_st *ptr,
const char *master_key, size_t master_key_length,
const char *key, size_t key_length,
const char *value, size_t value_length,
time_t expiration,
uint32_t flags,
uint64_t cas,
memcached_storage_action verb)
{
char to_write;
size_t write_length;
ssize_t sent_length;
memcached_return rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
unsigned int server_key;
WATCHPOINT_ASSERT(!(value == NULL && value_length > 0));
rc= memcached_validate_key_length(key_length, ptr->flags & MEM_BINARY_PROTOCOL);
unlikely (rc != MEMCACHED_SUCCESS)
return rc;
unlikely (ptr->number_of_hosts == 0)
return MEMCACHED_NO_SERVERS;
if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test((const char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
if (ptr->flags & MEM_BINARY_PROTOCOL)
return memcached_send_binary(ptr, master_key, master_key_length,
key, key_length,
value, value_length, expiration,
flags, cas, verb);
server_key= memcached_generate_hash(ptr, master_key, master_key_length);
if (cas)
write_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s%s%.*s %u %llu %zu %llu%s\r\n",
storage_op_string(verb),
ptr->prefix_key,
(int)key_length, key, flags,
(unsigned long long)expiration, value_length,
(unsigned long long)cas,
(ptr->flags & MEM_NOREPLY) ? " noreply" : "");
else
{
char *buffer_ptr= buffer;
const char *command= storage_op_string(verb);
/* Copy in the command, no space needed, we handle that in the command function*/
memcpy(buffer_ptr, command, strlen(command));
/* Copy in the key prefix, switch to the buffer_ptr */
buffer_ptr= memcpy(buffer_ptr + strlen(command) , ptr->prefix_key, strlen(ptr->prefix_key));
/* Copy in the key, adjust point if a key prefix was used. */
buffer_ptr= memcpy(buffer_ptr + (ptr->prefix_key ? strlen(ptr->prefix_key) : 0),
key, key_length);
buffer_ptr+= key_length;
buffer_ptr[0]= ' ';
buffer_ptr++;
write_length= (size_t)(buffer_ptr - buffer);
if (verb == DELETE_OP) {
if (ptr->flags & MEM_NOREPLY)
write_length+= (size_t) snprintf(buffer_ptr, MEMCACHED_DEFAULT_COMMAND_SIZE, "noreply");
} else {
write_length+= (size_t) snprintf(buffer_ptr, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%u %llu %zu%s\r\n",
flags,
(unsigned long long)expiration, value_length,
(ptr->flags & MEM_NOREPLY) ? " noreply" : "");
}
}
if (ptr->flags & MEM_USE_UDP && ptr->flags & MEM_BUFFER_REQUESTS)
{
size_t cmd_size= write_length + value_length + 2;
if (cmd_size > MAX_UDP_DATAGRAM_LENGTH - UDP_DATAGRAM_HEADER_LENGTH)
return MEMCACHED_WRITE_FAILURE;
if (cmd_size + ptr->hosts[server_key].write_buffer_offset > MAX_UDP_DATAGRAM_LENGTH)
memcached_io_write(&ptr->hosts[server_key], NULL, 0, 1);
}
if (write_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
return MEMCACHED_WRITE_FAILURE;
/* Send command header */
rc= memcached_do(&ptr->hosts[server_key], buffer, write_length, 0);
if (rc != MEMCACHED_SUCCESS)
return rc;
/* Send command body */
if ((sent_length= memcached_io_write(&ptr->hosts[server_key], value, value_length, 0)) == -1)
return MEMCACHED_WRITE_FAILURE;
if ((ptr->flags & MEM_BUFFER_REQUESTS) &&
(verb == SET_OP || verb == PREPEND_OP || verb == APPEND_OP || verb == DELETE_OP))
to_write= 0;
else
to_write= 1;
if ((sent_length= memcached_io_write(&ptr->hosts[server_key], "\r\n", 2, to_write)) == -1)
return MEMCACHED_WRITE_FAILURE;
if (ptr->flags & MEM_NOREPLY)
return (to_write == 0) ? MEMCACHED_BUFFERED : MEMCACHED_SUCCESS;
if (to_write == 0)
return MEMCACHED_BUFFERED;
rc= memcached_response(&ptr->hosts[server_key], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
if (rc == MEMCACHED_STORED || rc == MEMCACHED_DELETED)
return MEMCACHED_SUCCESS;
return rc;
}
static inline memcached_return_t memcached_send(memcached_st *ptr,
const char *master_key, size_t master_key_length,
const char *key, size_t key_length,
const char *value, size_t value_length,
time_t expiration,
uint32_t flags,
uint64_t cas,
uint16_t vbucketid,
memcached_storage_action_t verb)
{
bool to_write;
size_t write_length;
memcached_return_t rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
uint32_t server_key;
memcached_server_write_instance_st instance;
WATCHPOINT_ASSERT(!(value == NULL && value_length > 0));
rc= memcached_validate_key_length(key_length, ptr->flags.binary_protocol);
unlikely (rc != MEMCACHED_SUCCESS)
return rc;
unlikely (memcached_server_count(ptr) == 0)
return MEMCACHED_NO_SERVERS;
if (ptr->flags.verify_key && (memcached_key_test((const char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
server_key= memcached_generate_hash_with_redistribution(ptr, master_key, master_key_length);
instance= memcached_server_instance_fetch(ptr, server_key);
instance->read_buffer_length = 0;
WATCHPOINT_SET(instance->io_wait_count.read= 0);
WATCHPOINT_SET(instance->io_wait_count.write= 0);
if (ptr->flags.binary_protocol)
{
rc= memcached_send_binary(ptr, instance, server_key,
key, key_length,
value, value_length, expiration,
flags, cas, vbucketid, verb);
WATCHPOINT_IF_LABELED_NUMBER(instance->io_wait_count.read > 2, "read IO_WAIT", instance->io_wait_count.read);
WATCHPOINT_IF_LABELED_NUMBER(instance->io_wait_count.write > 2, "write_IO_WAIT", instance->io_wait_count.write);
}
else
{
if (cas)
{
int check_length;
check_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s %.*s%.*s %u %llu %lu %llu%s\r\n",
storage_op_string(verb),
(int)ptr->prefix_key_length,
ptr->prefix_key,
(int)key_length, key, flags,
(unsigned long long)expiration, (unsigned long)value_length,
(unsigned long long)cas,
(ptr->flags.no_reply) ? " noreply" : "");
if (check_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || check_length < 0)
{
rc= MEMCACHED_WRITE_FAILURE;
memcached_io_reset(instance);
return rc;
}
write_length= check_length;
}
else
{
char *buffer_ptr= buffer;
const char *command= storage_op_string(verb);
/* Copy in the command, no space needed, we handle that in the command function*/
memcpy(buffer_ptr, command, strlen(command));
/* Copy in the key prefix, switch to the buffer_ptr */
buffer_ptr= memcpy((buffer_ptr + strlen(command)), ptr->prefix_key, ptr->prefix_key_length);
/* Copy in the key, adjust point if a key prefix was used. */
buffer_ptr= memcpy(buffer_ptr + (ptr->prefix_key_length ? ptr->prefix_key_length : 0),
key, key_length);
buffer_ptr+= key_length;
buffer_ptr[0]= ' ';
buffer_ptr++;
write_length= (size_t)(buffer_ptr - buffer);
int check_length;
check_length= snprintf(buffer_ptr, MEMCACHED_DEFAULT_COMMAND_SIZE -(size_t)(buffer_ptr - buffer),
"%u %llu %lu%s\r\n",
flags,
(unsigned long long)expiration, (unsigned long)value_length,
ptr->flags.no_reply ? " noreply" : "");
if ((size_t)check_length >= MEMCACHED_DEFAULT_COMMAND_SIZE -(size_t)(buffer_ptr - buffer) || check_length < 0)
{
rc= MEMCACHED_WRITE_FAILURE;
memcached_io_reset(instance);
return rc;
}
write_length+= (size_t)check_length;
WATCHPOINT_ASSERT(write_length < MEMCACHED_DEFAULT_COMMAND_SIZE);
}
if (ptr->flags.use_udp && ptr->flags.buffer_requests)
{
size_t cmd_size= write_length + value_length + 2;
if (cmd_size > MAX_UDP_DATAGRAM_LENGTH - UDP_DATAGRAM_HEADER_LENGTH)
return MEMCACHED_WRITE_FAILURE;
if (cmd_size + instance->write_buffer_offset > MAX_UDP_DATAGRAM_LENGTH)
memcached_io_write(instance, NULL, 0, true);
}
if (write_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
{
rc= MEMCACHED_WRITE_FAILURE;
}
else
{
struct libmemcached_io_vector_st vector[]=
{
{ .length= write_length, .buffer= buffer },
{ .length= value_length, .buffer= value },
{ .length= 2, .buffer= "\r\n" }
};
memcached_return_t memcached_callback_set(memcached_st *ptr,
const memcached_callback_t flag,
void *data)
{
switch (flag)
{
case MEMCACHED_CALLBACK_PREFIX_KEY:
{
char *key= (char *)data;
if (key)
{
size_t key_length= strlen(key);
if (memcached_key_test((const char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED)
{
return MEMCACHED_BAD_KEY_PROVIDED;
}
if ((key_length > MEMCACHED_PREFIX_KEY_MAX_SIZE -1)
|| (strncpy(ptr->prefix_key, key, MEMCACHED_PREFIX_KEY_MAX_SIZE) == NULL))
{
ptr->prefix_key_length= 0;
return MEMCACHED_BAD_KEY_PROVIDED;
}
else
{
ptr->prefix_key_length= key_length;
}
}
else
{
ptr->prefix_key[0]= 0;
ptr->prefix_key_length= 0;
}
break;
}
case MEMCACHED_CALLBACK_USER_DATA:
{
ptr->user_data= data;
break;
}
case MEMCACHED_CALLBACK_CLEANUP_FUNCTION:
{
memcached_cleanup_fn func= *(memcached_cleanup_fn *)&data;
ptr->on_cleanup= func;
break;
}
case MEMCACHED_CALLBACK_CLONE_FUNCTION:
{
memcached_clone_fn func= *(memcached_clone_fn *)&data;
ptr->on_clone= func;
break;
}
#ifdef MEMCACHED_ENABLE_DEPRECATED
case MEMCACHED_CALLBACK_MALLOC_FUNCTION:
{
memcached_malloc_function func= *(memcached_malloc_fn *)&data;
ptr->call_malloc= func;
break;
}
case MEMCACHED_CALLBACK_REALLOC_FUNCTION:
{
memcached_realloc_function func= *(memcached_realloc_fn *)&data;
ptr->call_realloc= func;
break;
}
case MEMCACHED_CALLBACK_FREE_FUNCTION:
{
memcached_free_function func= *(memcached_free_fn *)&data;
ptr->call_free= func;
break;
}
#endif
case MEMCACHED_CALLBACK_GET_FAILURE:
{
memcached_trigger_key_fn func= *(memcached_trigger_key_fn *)&data;
ptr->get_key_failure= func;
break;
}
case MEMCACHED_CALLBACK_DELETE_TRIGGER:
{
memcached_trigger_delete_key_fn func= *(memcached_trigger_delete_key_fn *)&data;
ptr->delete_trigger= func;
break;
}
case MEMCACHED_CALLBACK_MAX:
default:
return MEMCACHED_FAILURE;
}
return MEMCACHED_SUCCESS;
}
