/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Libmemcached library
*
* Copyright (C) 2011-2013 Data Differential, http://datadifferential.com/
*
* 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>
static const char *memcached_stat_keys[] = {
"pid",
"uptime",
"time",
"version",
"pointer_size",
"rusage_user",
"rusage_system",
"curr_items",
"total_items",
"bytes",
"curr_connections",
"total_connections",
"connection_structures",
"cmd_get",
"cmd_set",
"get_hits",
"get_misses",
"evictions",
"bytes_read",
"bytes_written",
"limit_maxbytes",
"threads",
NULL
};
struct local_context
{
memcached_stat_fn func;
void *context;
const char *args;
const size_t args_length;
local_context(memcached_stat_fn func_arg,
void *context_arg,
const char *args_arg,
const size_t args_length_arg) :
func(func_arg),
context(context_arg),
args(args_arg),
args_length(args_length_arg)
{ }
};
static memcached_return_t set_data(memcached_stat_st *memc_stat, const char *key, const char *value)
{
if (strlen(key) < 1)
{
WATCHPOINT_STRING(key);
return MEMCACHED_UNKNOWN_STAT_KEY;
}
else if (strcmp("pid", key) == 0)
{
errno= 0;
int64_t temp= strtoll(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
if (temp <= INT32_MAX and ( sizeof(pid_t) == sizeof(int32_t) ))
{
memc_stat->pid= pid_t(temp);
}
else if (temp > -1)
{
memc_stat->pid= pid_t(temp);
}
else
{
// If we got a value less then -1 then something went wrong in the
// protocol
}
}
else if (not strcmp("uptime", key))
{
errno= 0;
memc_stat->uptime= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("time", key))
{
errno= 0;
memc_stat->time= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("version", key))
{
memcpy(memc_stat->version, value, strlen(value));
memc_stat->version[strlen(value)]= 0;
}
else if (not strcmp("pointer_size", key))
{
errno= 0;
memc_stat->pointer_size= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("rusage_user", key))
{
char *walk_ptr;
for (walk_ptr= (char*)value; (!ispunct(*walk_ptr)); walk_ptr++) {};
*walk_ptr= 0;
walk_ptr++;
errno= 0;
memc_stat->rusage_user_seconds= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
errno= 0;
memc_stat->rusage_user_microseconds= strtoul(walk_ptr, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("rusage_system", key))
{
char *walk_ptr;
for (walk_ptr= (char*)value; (!ispunct(*walk_ptr)); walk_ptr++) {};
*walk_ptr= 0;
walk_ptr++;
errno= 0;
memc_stat->rusage_system_seconds= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
errno= 0;
memc_stat->rusage_system_microseconds= strtoul(walk_ptr, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("curr_items", key))
{
errno= 0;
memc_stat->curr_items= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("total_items", key))
{
errno= 0;
memc_stat->total_items= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("bytes_read", key))
{
errno= 0;
memc_stat->bytes_read= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("bytes_written", key))
{
errno= 0;
memc_stat->bytes_written= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("bytes", key))
{
errno= 0;
memc_stat->bytes= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("curr_connections", key))
{
errno= 0;
memc_stat->curr_connections= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("total_connections", key))
{
errno= 0;
memc_stat->total_connections= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("connection_structures", key))
{
errno= 0;
memc_stat->connection_structures= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("cmd_get", key))
{
errno= 0;
memc_stat->cmd_get= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("cmd_set", key))
{
errno= 0;
memc_stat->cmd_set= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("get_hits", key))
{
errno= 0;
memc_stat->get_hits= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("get_misses", key))
{
errno= 0;
memc_stat->get_misses= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("evictions", key))
{
errno= 0;
memc_stat->evictions= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("limit_maxbytes", key))
{
errno= 0;
memc_stat->limit_maxbytes= strtoull(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if (not strcmp("threads", key))
{
errno= 0;
memc_stat->threads= strtoul(value, (char **)NULL, 10);
if (errno != 0)
{
return MEMCACHED_FAILURE;
}
}
else if ((strcmp("delete_misses", key) == 0 or /* New stats in the 1.3 beta */
strcmp("delete_hits", key) == 0 or /* Just swallow them for now.. */
strcmp("incr_misses", key) == 0 or
strcmp("incr_hits", key) == 0 or
strcmp("decr_misses", key) == 0 or
strcmp("decr_hits", key) == 0 or
strcmp("cas_misses", key) == 0 or
strcmp("cas_hits", key) == 0 or
strcmp("cas_badval", key) == 0 or
strcmp("cmd_flush", key) == 0 or
strcmp("accepting_conns", key) == 0 or
strcmp("listen_disabled_num", key) == 0 or
strcmp("conn_yields", key) == 0 or
strcmp("auth_cmds", key) == 0 or
strcmp("auth_errors", key) == 0 or
strcmp("reclaimed", key) == 0) == 0)
{
WATCHPOINT_STRING(key);
/* return MEMCACHED_UNKNOWN_STAT_KEY; */
return MEMCACHED_SUCCESS;
}
return MEMCACHED_SUCCESS;
}
char *memcached_stat_get_value(const memcached_st *, memcached_stat_st *memc_stat,
const char *key, memcached_return_t *error)
{
memcached_return_t not_used;
if (error == NULL)
{
error= ¬_used;
}
if (memc_stat == NULL)
{
*error= MEMCACHED_INVALID_ARGUMENTS;
return NULL;
}
char buffer[SMALL_STRING_LEN];
int length;
*error= MEMCACHED_SUCCESS;
if (memcmp("pid", key, sizeof("pid") -1) == 0)
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lld", (signed long long)memc_stat->pid);
}
else if (not memcmp("uptime", key, sizeof("uptime") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->uptime);
}
else if (not memcmp("time", key, sizeof("time") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->time);
}
else if (not memcmp("version", key, sizeof("version") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%s", memc_stat->version);
}
else if (not memcmp("pointer_size", key, sizeof("pointer_size") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->pointer_size);
}
else if (not memcmp("rusage_user", key, sizeof("rusage_user") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu.%lu", memc_stat->rusage_user_seconds, memc_stat->rusage_user_microseconds);
}
else if (not memcmp("rusage_system", key, sizeof("rusage_system") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu.%lu", memc_stat->rusage_system_seconds, memc_stat->rusage_system_microseconds);
}
else if (not memcmp("curr_items", key, sizeof("curr_items") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->curr_items);
}
else if (not memcmp("total_items", key, sizeof("total_items") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->total_items);
}
else if (not memcmp("curr_connections", key, sizeof("curr_connections") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->curr_connections);
}
else if (not memcmp("total_connections", key, sizeof("total_connections") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->total_connections);
}
else if (not memcmp("connection_structures", key, sizeof("connection_structures") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->connection_structures);
}
else if (not memcmp("cmd_get", key, sizeof("cmd_get") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->cmd_get);
}
else if (not memcmp("cmd_set", key, sizeof("cmd_set") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->cmd_set);
}
else if (not memcmp("get_hits", key, sizeof("get_hits") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->get_hits);
}
else if (not memcmp("get_misses", key, sizeof("get_misses") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->get_misses);
}
else if (not memcmp("evictions", key, sizeof("evictions") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->evictions);
}
else if (not memcmp("bytes_read", key, sizeof("bytes_read") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes_read);
}
else if (not memcmp("bytes_written", key, sizeof("bytes_written") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes_written);
}
else if (not memcmp("bytes", key, sizeof("bytes") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes);
}
else if (not memcmp("limit_maxbytes", key, sizeof("limit_maxbytes") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->limit_maxbytes);
}
else if (not memcmp("threads", key, sizeof("threads") -1))
{
length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->threads);
}
else
{
*error= MEMCACHED_NOTFOUND;
return NULL;
}
if (length >= SMALL_STRING_LEN || length < 0)
{
*error= MEMCACHED_FAILURE;
return NULL;
}
// User is responsible for free() memory, so use malloc()
char *ret= static_cast<char *>(malloc(size_t(length +1)));
memcpy(ret, buffer, (size_t) length);
ret[length]= '\0';
return ret;
}
static memcached_return_t binary_stats_fetch(memcached_stat_st *memc_stat,
const char *args,
const size_t args_length,
memcached_instance_st* instance,
struct local_context *check)
{
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
protocol_binary_request_stats request= {}; // = {.bytes= {0}};
initialize_binary_request(instance, request.message.header);
request.message.header.request.opcode= PROTOCOL_BINARY_CMD_STAT;
request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
if (args_length)
{
request.message.header.request.keylen= htons(uint16_t(args_length));
request.message.header.request.bodylen= htonl(uint32_t( args_length));
libmemcached_io_vector_st vector[]=
{
{ request.bytes, sizeof(request.bytes) },
{ args, args_length }
};
if (memcached_vdo(instance, vector, 2, true) != MEMCACHED_SUCCESS)
{
memcached_io_reset(instance);
return MEMCACHED_WRITE_FAILURE;
}
}
else
{
libmemcached_io_vector_st vector[]=
{
{ request.bytes, sizeof(request.bytes) }
};
if (memcached_vdo(instance, vector, 1, true) != MEMCACHED_SUCCESS)
{
memcached_io_reset(instance);
return MEMCACHED_WRITE_FAILURE;
}
}
memcached_server_response_decrement(instance);
while (1)
{
memcached_return_t rc= memcached_response(instance, buffer, sizeof(buffer), NULL);
if (rc == MEMCACHED_END)
{
break;
}
if (rc != MEMCACHED_SUCCESS)
{
memcached_io_reset(instance);
return rc;
}
if (check && check->func)
{
size_t key_length= strlen(buffer);
check->func(instance,
buffer, key_length,
buffer+key_length+1, strlen(buffer+key_length+1),
check->context);
}
if (memc_stat)
{
if ((set_data(memc_stat, buffer, buffer + strlen(buffer) + 1)) == MEMCACHED_UNKNOWN_STAT_KEY)
{
WATCHPOINT_ERROR(MEMCACHED_UNKNOWN_STAT_KEY);
WATCHPOINT_ASSERT(0);
}
}
}
/*
* memcached_response will decrement the counter, so I need to reset it..
* todo: look at this and try to find a better solution.
* */
instance->cursor_active_= 0;
return MEMCACHED_SUCCESS;
}
static memcached_return_t ascii_stats_fetch(memcached_stat_st *memc_stat,
const char *args,
const size_t args_length,
memcached_instance_st* instance,
struct local_context *check)
{
libmemcached_io_vector_st vector[]=
{
{ memcached_literal_param("stats ") },
{ args, args_length },
{ memcached_literal_param("\r\n") }
};
memcached_return_t rc= memcached_vdo(instance, vector, 3, true);
if (memcached_success(rc))
{
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
while ((rc= memcached_response(instance, buffer, sizeof(buffer), NULL)) == MEMCACHED_STAT)
{
char *string_ptr= buffer;
string_ptr+= 5; /* Move past STAT */
char *end_ptr;
for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++) {};
char *key= string_ptr;
key[size_t(end_ptr-string_ptr)]= 0;
string_ptr= end_ptr + 1;
for (end_ptr= string_ptr; !(isspace(*end_ptr)); end_ptr++) {};
char *value= string_ptr;
value[(size_t)(end_ptr -string_ptr)]= 0;
#if 0
bool check_bool= bool(check);
bool check_func_bool= bool(check) ? bool(check->func) : false;
fprintf(stderr, "%s:%d %s %s %d:%d\n", __FILE__, __LINE__, key, value, check_bool, check_func_bool);
#endif
if (check and check->func)
{
check->func(instance,
key, strlen(key),
value, strlen(value),
check->context);
}
if (memc_stat)
{
if((set_data(memc_stat, key, value)) == MEMCACHED_UNKNOWN_STAT_KEY)
{
WATCHPOINT_ERROR(MEMCACHED_UNKNOWN_STAT_KEY);
WATCHPOINT_ASSERT(0);
}
}
}
}
if (rc == MEMCACHED_ERROR)
{
return MEMCACHED_INVALID_ARGUMENTS;
}
if (rc == MEMCACHED_END)
{
return MEMCACHED_SUCCESS;
}
return rc;
}
memcached_stat_st *memcached_stat(memcached_st *shell, char *args, memcached_return_t *error)
{
Memcached* self= memcached2Memcached(shell);
memcached_return_t unused;
if (error == NULL)
{
error= &unused;
}
if (memcached_failed(*error= initialize_query(self, true)))
{
return NULL;
}
if (memcached_is_udp(self))
{
*error= memcached_set_error(*self, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT);
return NULL;
}
memcached_return_t rc;
size_t args_length= 0;
if (args)
{
args_length= strlen(args);
rc= memcached_validate_key_length(args_length, self->flags.binary_protocol);
if (memcached_failed(rc))
{
*error= memcached_set_error(*self, rc, MEMCACHED_AT);
return NULL;
}
}
WATCHPOINT_ASSERT(error);
memcached_stat_st *stats= libmemcached_xcalloc(self, memcached_server_count(self), memcached_stat_st);
if (stats == NULL)
{
*error= memcached_set_error(*self, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT);
return NULL;
}
WATCHPOINT_ASSERT(rc == MEMCACHED_SUCCESS);
rc= MEMCACHED_SUCCESS;
for (uint32_t x= 0; x < memcached_server_count(self); x++)
{
memcached_stat_st* stat_instance= stats +x;
stat_instance->pid= -1;
stat_instance->root= self;
memcached_instance_st* instance= memcached_instance_fetch(self, x);
memcached_return_t temp_return;
if (memcached_is_binary(self))
{
temp_return= binary_stats_fetch(stat_instance, args, args_length, instance, NULL);
}
else
{
temp_return= ascii_stats_fetch(stat_instance, args, args_length, instance, NULL);
}
// Special case where "args" is invalid
if (temp_return == MEMCACHED_INVALID_ARGUMENTS)
{
rc= MEMCACHED_INVALID_ARGUMENTS;
break;
}
if (memcached_failed(temp_return))
{
rc= MEMCACHED_SOME_ERRORS;
}
}
*error= rc;
return stats;
}
memcached_return_t memcached_stat_servername(memcached_stat_st *memc_stat, char *args,
const char *hostname, in_port_t port)
{
memcached_st memc;
memcached_stat_st unused_memc_stat;
if (memc_stat == NULL)
{
memc_stat= &unused_memc_stat;
}
memset(memc_stat, 0, sizeof(memcached_stat_st));
memcached_st *memc_ptr= memcached_create(&memc);
if (memc_ptr == NULL)
{
return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
}
memcached_return_t rc;
if (memcached_failed(rc= memcached_server_add(&memc, hostname, port)))
{
memcached_free(&memc);
return rc;
}
if (memcached_success(rc= initialize_query(memc_ptr, true)))
{
size_t args_length= 0;
if (args)
{
args_length= strlen(args);
rc= memcached_validate_key_length(args_length, memc.flags.binary_protocol);
}
if (memcached_success(rc))
{
memcached_instance_st* instance= memcached_instance_fetch(memc_ptr, 0);
if (memc.flags.binary_protocol)
{
rc= binary_stats_fetch(memc_stat, args, args_length, instance, NULL);
}
else
{
rc= ascii_stats_fetch(memc_stat, args, args_length, instance, NULL);
}
}
}
memcached_free(&memc);
return rc;
}
/*
We make a copy of the keys since at some point in the not so distant future
we will add support for "found" keys.
*/
char ** memcached_stat_get_keys(memcached_st *shell,
memcached_stat_st *,
memcached_return_t *error)
{
Memcached* memc= memcached2Memcached(shell);
if (memc)
{
char **list= static_cast<char **>(libmemcached_malloc(memc, sizeof(memcached_stat_keys)));
if (list == NULL)
{
if (error)
{
*error= memcached_set_error(*memc, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT);
}
return NULL;
}
memcpy(list, memcached_stat_keys, sizeof(memcached_stat_keys));
if (error)
{
*error= MEMCACHED_SUCCESS;
}
return list;
}
return NULL;
}
void memcached_stat_free(const memcached_st *, memcached_stat_st *memc_stat)
{
WATCHPOINT_ASSERT(memc_stat); // Be polite, but when debugging catch this as an error
if (memc_stat)
{
libmemcached_free(memc_stat->root, memc_stat);
}
}
static memcached_return_t call_stat_fn(memcached_st *memc,
memcached_instance_st* instance,
void *context)
{
if (memc)
{
local_context *check= (struct local_context *)context;
if (memcached_is_binary(memc))
{
return binary_stats_fetch(NULL, check->args, check->args_length, instance, check);
}
else
{
return ascii_stats_fetch(NULL, check->args, check->args_length, instance, check);
}
}
return MEMCACHED_INVALID_ARGUMENTS;
}
memcached_return_t memcached_stat_execute(memcached_st *shell, const char *args, memcached_stat_fn func, void *context)
{
Memcached* memc= memcached2Memcached(shell);
if (memcached_fatal(memcached_version(memc)))
{
return memcached_last_error(memc);
}
local_context check(func, context, args, args ? strlen(args) : 0);
return memcached_server_execute(memc, call_stat_fn, (void *)&check);
}