-/* LibMemcached
- * Copyright (C) 2006-2009 Brian Aker
- * All rights reserved.
+/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ *
+ * Libmemcached library
*
- * Use and distribution licensed under the BSD license. See
- * the COPYING file in the parent directory for full text.
+ * Copyright (C) 2011 Data Differential, http://datadifferential.com/
+ * Copyright (C) 2006-2009 Brian Aker All rights reserved.
*
- * Summary: Storage related functions, aka set, replace,..
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * * The names of its contributors may not be used to endorse or
+ * promote products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
+
#include <libmemcached/common.h>
enum memcached_storage_action_t {
static inline uint8_t get_com_code(memcached_storage_action_t verb, bool noreply)
{
- /* 0 isn't a value we want, but GCC 4.2 seems to think ret can otherwise
- * be used uninitialized in this function. FAIL */
- uint8_t ret= 0;
-
if (noreply)
+ {
switch (verb)
{
case SET_OP:
- ret=PROTOCOL_BINARY_CMD_SETQ;
- break;
- case ADD_OP:
- ret=PROTOCOL_BINARY_CMD_ADDQ;
- break;
- case CAS_OP: /* FALLTHROUGH */
- case REPLACE_OP:
- ret=PROTOCOL_BINARY_CMD_REPLACEQ;
- break;
- case APPEND_OP:
- ret=PROTOCOL_BINARY_CMD_APPENDQ;
- break;
- case PREPEND_OP:
- ret=PROTOCOL_BINARY_CMD_PREPENDQ;
- break;
- default:
- WATCHPOINT_ASSERT(verb);
- break;
- }
- else
- switch (verb)
- {
- case SET_OP:
- ret=PROTOCOL_BINARY_CMD_SET;
- break;
+ return PROTOCOL_BINARY_CMD_SETQ;
+
case ADD_OP:
- ret=PROTOCOL_BINARY_CMD_ADD;
- break;
+ return PROTOCOL_BINARY_CMD_ADDQ;
+
case CAS_OP: /* FALLTHROUGH */
case REPLACE_OP:
- ret=PROTOCOL_BINARY_CMD_REPLACE;
- break;
+ return PROTOCOL_BINARY_CMD_REPLACEQ;
+
case APPEND_OP:
- ret=PROTOCOL_BINARY_CMD_APPEND;
- break;
+ return PROTOCOL_BINARY_CMD_APPENDQ;
+
case PREPEND_OP:
- ret=PROTOCOL_BINARY_CMD_PREPEND;
- break;
- default:
- WATCHPOINT_ASSERT(verb);
- break;
+ return PROTOCOL_BINARY_CMD_PREPENDQ;
}
+ }
- return ret;
+ switch (verb)
+ {
+ case SET_OP:
+ break;
+
+ case ADD_OP:
+ return PROTOCOL_BINARY_CMD_ADD;
+
+ case CAS_OP: /* FALLTHROUGH */
+ case REPLACE_OP:
+ return PROTOCOL_BINARY_CMD_REPLACE;
+
+ case APPEND_OP:
+ return PROTOCOL_BINARY_CMD_APPEND;
+
+ case PREPEND_OP:
+ return PROTOCOL_BINARY_CMD_PREPEND;
+ }
+
+ return PROTOCOL_BINARY_CMD_SET;
}
static memcached_return_t memcached_send_binary(memcached_st *ptr,
time_t expiration,
uint32_t flags,
uint64_t cas,
+ bool flush,
memcached_storage_action_t verb)
{
- bool flush;
protocol_binary_request_set request= {};
size_t send_length= sizeof(request.bytes);
request.message.header.request.opcode= get_com_code(verb, noreply);
request.message.header.request.keylen= htons((uint16_t)(key_length + memcached_array_size(ptr->_namespace)));
request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
- if (verb == APPEND_OP || verb == PREPEND_OP)
+ if (verb == APPEND_OP or verb == PREPEND_OP)
{
send_length -= 8; /* append & prepend does not contain extras! */
}
request.message.header.request.cas= memcached_htonll(cas);
}
- flush= (bool) ((server->root->flags.buffer_requests && verb == SET_OP) ? 0 : 1);
-
- if (server->root->flags.use_udp && ! flush)
+ if (server->root->flags.use_udp and flush == false)
{
size_t cmd_size= send_length + key_length + value_length;
if ((rc= memcached_vdo(server, vector, 4, flush)) != MEMCACHED_SUCCESS)
{
memcached_io_reset(server);
- return (rc == MEMCACHED_SUCCESS) ? MEMCACHED_WRITE_FAILURE : rc;
+
+ if (ptr->error_messages == NULL)
+ {
+ memcached_set_error(*server, rc, MEMCACHED_AT);
+ }
+
+ return MEMCACHED_WRITE_FAILURE;
}
if (verb == SET_OP && ptr->number_of_replicas > 0)
for (uint32_t x= 0; x < ptr->number_of_replicas; x++)
{
- memcached_server_write_instance_st instance;
-
++server_key;
if (server_key == memcached_server_count(ptr))
+ {
server_key= 0;
+ }
- instance= memcached_server_instance_fetch(ptr, server_key);
+ memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, server_key);
if (memcached_vdo(instance, vector, 4, false) != MEMCACHED_SUCCESS)
{
static memcached_return_t memcached_send_ascii(memcached_st *ptr,
memcached_server_write_instance_st instance,
const char *key,
- size_t key_length,
+ const 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)
+ const size_t value_length,
+ const time_t expiration,
+ const uint32_t flags,
+ const uint64_t cas,
+ const bool flush,
+ const memcached_storage_action_t verb)
{
- bool to_write;
- size_t write_length;
- char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
- memcached_return_t rc;
+ // Invert the logic to make it simpler to read the code
+ bool reply= (ptr->flags.no_reply) ? false : true;
- if (cas)
+ char flags_buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
+ int flags_buffer_length= snprintf(flags_buffer, sizeof(flags_buffer), " %u", flags);
+ if (size_t(flags_buffer_length) >= sizeof(flags_buffer) or flags_buffer_length < 0)
{
- 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),
- memcached_print_array(ptr->_namespace),
- (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_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
- memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
- memcached_io_reset(instance);
+ return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("snprintf(MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH)"));
+ }
- return rc;
- }
- write_length= check_length;
+ char expiration_buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
+ int expiration_buffer_length= snprintf(expiration_buffer, sizeof(expiration_buffer), " %llu", (unsigned long long)expiration);
+ if (size_t(expiration_buffer_length) >= sizeof(expiration_buffer) or expiration_buffer_length < 0)
+ {
+ return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("snprintf(MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH)"));
}
- else
+
+ char value_buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
+ int value_buffer_length= snprintf(value_buffer, sizeof(value_buffer), " %llu", (unsigned long long)value_length);
+ if (size_t(value_buffer_length) >= sizeof(value_buffer) or value_buffer_length < 0)
{
- 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= (char *)memcpy((char *)(buffer_ptr + strlen(command)), (char *)memcached_array_string(ptr->_namespace), memcached_array_size(ptr->_namespace));
-
- /* Copy in the key, adjust point if a key prefix was used. */
- buffer_ptr= (char *)memcpy(buffer_ptr + memcached_array_size(ptr->_namespace),
- key, key_length);
- buffer_ptr+= key_length;
- buffer_ptr[0]= ' ';
- buffer_ptr++;
-
- write_length= (size_t)(buffer_ptr - buffer);
- int 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_set_error(*ptr, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
- memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
- memcached_io_reset(instance);
+ return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("snprintf(MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH)"));
+ }
- return rc;
+ char cas_buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
+ int cas_buffer_length= 0;
+ if (cas)
+ {
+ cas_buffer_length= snprintf(cas_buffer, sizeof(cas_buffer), " %llu", (unsigned long long)cas);
+ if (size_t(cas_buffer_length) >= sizeof(cas_buffer) or cas_buffer_length < 0)
+ {
+ return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("snprintf(MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH)"));
}
-
- write_length+= (size_t)check_length;
- WATCHPOINT_ASSERT(write_length < MEMCACHED_DEFAULT_COMMAND_SIZE);
}
- if (ptr->flags.use_udp && ptr->flags.buffer_requests)
+ struct libmemcached_io_vector_st vector[]=
+ {
+ { storage_op_string(verb), strlen(storage_op_string(verb))},
+ { memcached_array_string(ptr->_namespace), memcached_array_size(ptr->_namespace) },
+ { key, key_length },
+ { flags_buffer, flags_buffer_length },
+ { expiration_buffer, expiration_buffer_length },
+ { value_buffer, value_buffer_length },
+ { cas_buffer, cas_buffer_length },
+ { " noreply", reply ? 0 : memcached_literal_param_size(" noreply") },
+ { memcached_literal_param("\r\n") },
+ { value, value_length },
+ { memcached_literal_param("\r\n") }
+ };
+
+ if (memcached_is_udp(instance->root))
{
+ size_t write_length= io_vector_total_size(vector, 11);
+
size_t cmd_size= write_length + value_length +2;
if (cmd_size > MAX_UDP_DATAGRAM_LENGTH - UDP_DATAGRAM_HEADER_LENGTH)
+ {
return memcached_set_error(*ptr, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
+ }
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)
+ /* Send command header */
+ memcached_return_t rc= memcached_vdo(instance, vector, 11, flush);
+ if (rc == MEMCACHED_SUCCESS)
{
- rc= memcached_set_error(*ptr, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
- }
- else
- {
- struct libmemcached_io_vector_st vector[]=
+ if (ptr->flags.no_reply and flush)
{
- { buffer, write_length },
- { value, value_length },
- { memcached_literal_param("\r\n") }
- };
-
- if (ptr->flags.buffer_requests && verb == SET_OP)
- {
- to_write= false;
+ rc= MEMCACHED_SUCCESS;
}
- else
+ else if (flush == false)
{
- to_write= true;
+ rc= MEMCACHED_BUFFERED;
}
-
- /* Send command header */
- rc= memcached_vdo(instance, vector, 3, to_write);
- if (rc == MEMCACHED_SUCCESS)
+ else
{
+ char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
+ rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
- if (ptr->flags.no_reply)
- {
- rc= (to_write == false) ? MEMCACHED_BUFFERED : MEMCACHED_SUCCESS;
- }
- else if (to_write == false)
- {
- rc= MEMCACHED_BUFFERED;
- }
- else
+ if (rc == MEMCACHED_STORED)
{
- rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
-
- if (rc == MEMCACHED_STORED)
- rc= MEMCACHED_SUCCESS;
+ rc= MEMCACHED_SUCCESS;
}
}
}
if (rc == MEMCACHED_WRITE_FAILURE)
+ {
memcached_io_reset(instance);
+ }
+
+ if (memcached_failed(rc) and ptr->error_messages == NULL)
+ {
+ memcached_set_error(*ptr, rc, MEMCACHED_AT);
+ }
return rc;
}
const char *group_key, size_t group_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,
+ const time_t expiration,
+ const uint32_t flags,
+ const uint64_t cas,
memcached_storage_action_t verb)
{
memcached_return_t rc;
WATCHPOINT_SET(instance->io_wait_count.read= 0);
WATCHPOINT_SET(instance->io_wait_count.write= 0);
+ bool flush= (bool) ((instance->root->flags.buffer_requests && verb == SET_OP) ? 0 : 1);
if (ptr->flags.binary_protocol)
{
rc= memcached_send_binary(ptr, instance, server_key,
key, key_length,
value, value_length, expiration,
- flags, cas, verb);
+ flags, cas, flush, verb);
}
else
{
rc= memcached_send_ascii(ptr, instance,
key, key_length,
value, value_length, expiration,
- flags, cas, verb);
+ flags, cas, flush, verb);
}
return rc;
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