memcached_return memcached_verbosity(memcached_st *ptr, unsigned int verbosity)
{
unsigned int x;
size_t send_length;
memcached_return rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"verbosity %u\r\n", verbosity);
unlikely (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
return MEMCACHED_WRITE_FAILURE;
rc= MEMCACHED_SUCCESS;
for (x= 0; x < ptr->number_of_hosts; x++)
{
memcached_return rrc;
rrc= memcached_do(&ptr->hosts[x], buffer, send_length, 1);
if (rrc != MEMCACHED_SUCCESS)
{
rc= MEMCACHED_SOME_ERRORS;
continue;
}
unlikely (ptr->flags & MEM_USE_UDP)
continue;
rrc= memcached_response(&ptr->hosts[x], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
if (rrc != MEMCACHED_SUCCESS)
rc= MEMCACHED_SOME_ERRORS;
}
return rc;
}
static memcached_return binary_incr_decr(memcached_st *ptr, uint8_t cmd,
const char *key, size_t key_length,
uint32_t offset, uint64_t *value)
{
unsigned int server_key;
#ifndef _MSC_VER
protocol_binary_request_incr request= {.bytes= {0}};
#else
protocol_binary_request_incr request= {0};
#endif
unlikely (ptr->hosts == NULL || ptr->number_of_hosts == 0)
return MEMCACHED_NO_SERVERS;
server_key= memcached_generate_hash(ptr, key, key_length);
request.message.header.request.magic= PROTOCOL_BINARY_REQ;
request.message.header.request.opcode= cmd;
request.message.header.request.keylen= htons((uint16_t)key_length);
request.message.header.request.extlen= 20;
request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
request.message.header.request.bodylen= htonl(key_length + request.message.header.request.extlen);
request.message.body.delta= htonll(offset);
/* TODO: The binary protocol allows you to specify initial and expiry time */
if ((memcached_do(&ptr->hosts[server_key], request.bytes,
sizeof(request.bytes), 0)!=MEMCACHED_SUCCESS) ||
(memcached_io_write(&ptr->hosts[server_key], key, key_length, 1) == -1))
{
memcached_io_reset(&ptr->hosts[server_key]);
return MEMCACHED_WRITE_FAILURE;
}
return memcached_response(&ptr->hosts[server_key], (char*)value, sizeof(*value), NULL);
}
static memcached_return_t memcached_flush_textual(memcached_st *ptr,
time_t expiration)
{
unsigned int x;
size_t send_length;
memcached_return_t rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
unlikely (memcached_server_count(ptr) == 0)
return MEMCACHED_NO_SERVERS;
for (x= 0; x < memcached_server_count(ptr); x++)
{
bool no_reply= ptr->flags.no_reply;
memcached_server_write_instance_st instance=
memcached_server_instance_fetch(ptr, x);
if (expiration)
send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"flush_all %llu%s\r\n",
(unsigned long long)expiration, no_reply ? " noreply" : "");
else
send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"flush_all%s\r\n", no_reply ? " noreply" : "");
rc= memcached_do(instance, buffer, send_length, true);
if (rc == MEMCACHED_SUCCESS && !no_reply)
(void)memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
}
return MEMCACHED_SUCCESS;
}
static memcached_return memcached_auto(memcached_st *ptr,
const char *verb,
const char *key, size_t key_length,
unsigned int offset,
uint64_t *value)
{
size_t send_length;
memcached_return rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
unsigned int server_key;
unlikely (ptr->hosts == NULL || ptr->number_of_hosts == 0)
return MEMCACHED_NO_SERVERS;
if ((ptr->flags & MEM_VERIFY_KEY) && (memcachd_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
server_key= memcached_generate_hash(ptr, key, key_length);
send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s %s%.*s %u\r\n", verb,
ptr->prefix_key,
(int)key_length, key,
offset);
unlikely (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
return MEMCACHED_WRITE_FAILURE;
rc= memcached_do(&ptr->hosts[server_key], buffer, send_length, 1);
if (rc != MEMCACHED_SUCCESS)
return rc;
rc= memcached_response(&ptr->hosts[server_key], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
/*
So why recheck responce? Because the protocol is brain dead :)
The number returned might end up equaling one of the string
values. Less chance of a mistake with strncmp() so we will
use it. We still called memcached_response() though since it
worked its magic for non-blocking IO.
*/
if (!strncmp(buffer, "ERROR\r\n", 7))
{
*value= 0;
rc= MEMCACHED_PROTOCOL_ERROR;
}
else if (!strncmp(buffer, "NOT_FOUND\r\n", 11))
{
*value= 0;
rc= MEMCACHED_NOTFOUND;
}
else
{
*value= strtoull(buffer, (char **)NULL, 10);
rc= MEMCACHED_SUCCESS;
}
return rc;
}
char *memcached_fetch(memcached_st *ptr, char *key, size_t *key_length,
size_t *value_length,
uint32_t *flags,
memcached_return *error)
{
memcached_result_st *result_buffer= &ptr->result;
while (ptr->cursor_server < ptr->number_of_hosts)
{
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
if (memcached_server_response_count(&ptr->hosts[ptr->cursor_server]) == 0)
{
ptr->cursor_server++;
continue;
}
*error= memcached_response(&ptr->hosts[ptr->cursor_server], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, result_buffer);
if (*error == MEMCACHED_END) /* END means that we move on to the next */
{
memcached_server_response_reset(&ptr->hosts[ptr->cursor_server]);
ptr->cursor_server++;
continue;
}
else if (*error == MEMCACHED_SUCCESS)
{
*value_length= memcached_string_length(&result_buffer->value);
if (key)
{
strncpy(key, result_buffer->key, result_buffer->key_length);
*key_length= result_buffer->key_length;
}
if (result_buffer->flags)
*flags= result_buffer->flags;
else
*flags= 0;
return memcached_string_c_copy(&result_buffer->value);
}
else
{
*value_length= 0;
return NULL;
}
}
ptr->cursor_server= 0;
*value_length= 0;
return NULL;
}
memcached_result_st *memcached_fetch_result(memcached_st *ptr,
memcached_result_st *result,
memcached_return *error)
{
if (result == NULL)
result= memcached_result_create(ptr, NULL);
#ifdef UNUSED
if (ptr->flags & MEM_NO_BLOCK)
memcached_io_preread(ptr);
#endif
while (ptr->cursor_server < ptr->number_of_hosts)
{
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
if (memcached_server_response_count(&ptr->hosts[ptr->cursor_server]) == 0)
{
ptr->cursor_server++;
continue;
}
*error= memcached_response(&ptr->hosts[ptr->cursor_server], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, result);
if (*error == MEMCACHED_END) /* END means that we move on to the next */
{
memcached_server_response_reset(&ptr->hosts[ptr->cursor_server]);
ptr->cursor_server++;
continue;
}
else if (*error == MEMCACHED_SUCCESS)
return result;
else
return NULL;
}
/* We have completed reading data */
if (result->is_allocated)
memcached_result_free(result);
else
memcached_string_reset(&result->value);
ptr->cursor_server= 0;
return NULL;
}
static memcached_return_t ascii_dump(memcached_st *ptr, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks)
{
memcached_return_t rc= MEMCACHED_SUCCESS;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
size_t send_length;
uint32_t server_key;
uint32_t x;
unlikely (memcached_server_count(ptr) == 0)
return MEMCACHED_NO_SERVERS;
for (server_key= 0; server_key < memcached_server_count(ptr); server_key++)
{
memcached_server_instance_st *instance;
instance= memcached_server_instance_fetch(ptr, server_key);
/* 256 I BELIEVE is the upper limit of slabs */
for (x= 0; x < 256; x++)
{
send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"stats cachedump %u 0 0\r\n", x);
rc= memcached_do(instance, buffer, send_length, true);
unlikely (rc != MEMCACHED_SUCCESS)
goto error;
while (1)
{
uint32_t callback_counter;
rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
if (rc == MEMCACHED_ITEM)
{
char *string_ptr, *end_ptr;
char *key;
string_ptr= buffer;
string_ptr+= 5; /* Move past ITEM */
for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++);
key= string_ptr;
key[(size_t)(end_ptr-string_ptr)]= 0;
for (callback_counter= 0; callback_counter < number_of_callbacks; callback_counter++)
{
rc= (*callback[callback_counter])(ptr, key, (size_t)(end_ptr-string_ptr), context);
if (rc != MEMCACHED_SUCCESS)
break;
}
}
else if (rc == MEMCACHED_END)
break;
else if (rc == MEMCACHED_SERVER_ERROR || rc == MEMCACHED_CLIENT_ERROR)
{
/* If we try to request stats cachedump for a slab class that is too big
* the server will return an incorrect error message:
* "MEMCACHED_SERVER_ERROR failed to allocate memory"
* This isn't really a fatal error, so let's just skip it. I want to
* fix the return value from the memcached server to a CLIENT_ERROR,
* so let's add support for that as well right now.
*/
rc= MEMCACHED_END;
break;
}
else
goto error;
}
}
}
error:
if (rc == MEMCACHED_END)
return MEMCACHED_SUCCESS;
else
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,
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 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) && (memcachd_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
server_key= memcached_generate_hash(ptr, master_key, master_key_length);
if (ptr->flags & MEM_BINARY_PROTOCOL)
return memcached_send_binary(&ptr->hosts[server_key], key, key_length,
value, value_length, expiration,
flags, cas, verb);
#ifndef _WIN32
if (cas)
write_length= 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
write_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s %s%.*s %u %llu %zu%s\r\n",
storage_op_string(verb),
ptr->prefix_key,
(int)key_length, key, flags,
(unsigned long long)expiration, value_length,
(ptr->flags & MEM_NOREPLY) ? " noreply" : "");
#else
if (cas)
write_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s %s%.*s %u %llu %u %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
write_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s %s%.*s %u %llu %u%s\r\n",
storage_op_string(verb),
ptr->prefix_key,
(int)key_length, key, flags,
(unsigned long long)expiration, value_length,
(ptr->flags & MEM_NOREPLY) ? " noreply" : "");
#endif
if (write_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
{
rc= MEMCACHED_WRITE_FAILURE;
goto error;
}
/* Send command header */
rc= memcached_do(&ptr->hosts[server_key], buffer, write_length, 0);
if (rc != MEMCACHED_SUCCESS)
goto error;
/* Send command body */
if ((sent_length= memcached_io_write(&ptr->hosts[server_key], value, value_length, 0)) == -1)
{
rc= MEMCACHED_WRITE_FAILURE;
goto error;
}
if ((ptr->flags & MEM_BUFFER_REQUESTS) && verb == SET_OP)
to_write= 0;
else
to_write= 1;
if ((sent_length= memcached_io_write(&ptr->hosts[server_key], "\r\n", 2, to_write)) == -1)
{
rc= MEMCACHED_WRITE_FAILURE;
goto error;
}
if (ptr->flags & MEM_NOREPLY)
{
memcached_server_response_decrement(&ptr->hosts[server_key]);
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)
return MEMCACHED_SUCCESS;
else
return rc;
error:
memcached_io_reset(&ptr->hosts[server_key]);
return rc;
}