X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=libmemcached%2Fdump.cc;h=f74f3ed1f564ce22fb53bdb09478ac5bf210a168;hb=1d0993d84fd87ef620f60380745914bac3e77d34;hp=830c3ff405c02d66d67e3a6600bfe87d99813081;hpb=3c74b93b3db239f4240c907a91678ed401fa41ad;p=awesomized%2Flibmemcached diff --git a/libmemcached/dump.cc b/libmemcached/dump.cc index 830c3ff4..f74f3ed1 100644 --- a/libmemcached/dump.cc +++ b/libmemcached/dump.cc @@ -44,103 +44,114 @@ #include -static memcached_return_t ascii_dump(memcached_st *ptr, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks) +static memcached_return_t ascii_dump(Memcached *memc, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks) { - memcached_return_t rc= MEMCACHED_SUCCESS; - - for (uint32_t server_key= 0; server_key < memcached_server_count(ptr); server_key++) + /* MAX_NUMBER_OF_SLAB_CLASSES is defined to 200 in Memcached 1.4.10 */ + for (uint32_t x= 0; x < 200; x++) { - memcached_server_write_instance_st instance; - instance= memcached_server_instance_fetch(ptr, server_key); - - /* 256 I BELIEVE is the upper limit of slabs */ - for (uint32_t x= 0; x < 256; x++) + char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE]; + int buffer_length= snprintf(buffer, sizeof(buffer), "%u", x); + if (size_t(buffer_length) >= sizeof(buffer) or buffer_length < 0) { - char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE]; - int buffer_length= snprintf(buffer, sizeof(buffer), "%u", x); - if (buffer_length >= MEMCACHED_DEFAULT_COMMAND_SIZE or buffer_length < 0) - { - return memcached_set_error(*ptr, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT, - memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)")); - } + return memcached_set_error(*memc, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT, + memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)")); + } - libmemcached_io_vector_st vector[]= - { - { memcached_literal_param("stats cachedump ") }, - { buffer, buffer_length }, - { memcached_literal_param(" 0 0\r\n") } - }; + // @NOTE the hard coded zero means "no limit" + libmemcached_io_vector_st vector[]= + { + { memcached_literal_param("stats cachedump ") }, + { buffer, size_t(buffer_length) }, + { memcached_literal_param(" 0\r\n") } + }; - rc= memcached_vdo(instance, vector, 3, true); + // Send message to all servers + for (uint32_t server_key= 0; server_key < memcached_server_count(memc); server_key++) + { + memcached_instance_st* instance= memcached_instance_fetch(memc, server_key); - if (rc != MEMCACHED_SUCCESS) + memcached_return_t vdo_rc; + if (memcached_success((vdo_rc= memcached_vdo(instance, vector, 3, true)))) { - goto error; + // We have sent the message to the server successfully } - - while (1) + else { - uint32_t callback_counter; - rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL); + return vdo_rc; + } + } - if (rc == MEMCACHED_ITEM) - { - char *string_ptr, *end_ptr; + // Collect the returned items + memcached_instance_st* instance; + memcached_return_t read_ret= MEMCACHED_SUCCESS; + while ((instance= memcached_io_get_readable_server(memc, read_ret))) + { + memcached_return_t response_rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL); + if (response_rc == MEMCACHED_ITEM) + { + char *string_ptr, *end_ptr; - string_ptr= buffer; - string_ptr+= 5; /* Move past ITEM */ + string_ptr= buffer; + string_ptr+= 5; /* Move past ITEM */ - for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++) {} ; + for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++) {} ; - char *key= string_ptr; - key[(size_t)(end_ptr-string_ptr)]= 0; + char *key= string_ptr; + key[(size_t)(end_ptr-string_ptr)]= 0; - for (callback_counter= 0; callback_counter < number_of_callbacks; callback_counter++) + for (uint32_t callback_counter= 0; callback_counter < number_of_callbacks; callback_counter++) + { + memcached_return_t callback_rc= (*callback[callback_counter])(memc, key, (size_t)(end_ptr-string_ptr), context); + if (callback_rc != MEMCACHED_SUCCESS) { - rc= (*callback[callback_counter])(ptr, key, (size_t)(end_ptr-string_ptr), context); - if (rc != MEMCACHED_SUCCESS) - { - break; - } + // @todo build up a message for the error from the value + memcached_set_error(*instance, callback_rc, MEMCACHED_AT); + break; } } - else if (rc == MEMCACHED_END) - { - break; - } - else if (rc == MEMCACHED_SERVER_ERROR or 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. + } + else if (response_rc == MEMCACHED_END) + { + // All items have been returned + } + else if (response_rc == MEMCACHED_SERVER_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. + */ + assert(response_rc == MEMCACHED_SUCCESS); // Just fail + return response_rc; + } + else if (response_rc == MEMCACHED_CLIENT_ERROR) + { + /* The maximum number of slabs has changed in the past (currently 1<<6-1), + * so ignore any client errors complaining about an illegal slab id. */ - rc= MEMCACHED_END; - break; - } - else - { - goto error; + if (0 == strncmp(buffer, "CLIENT_ERROR Illegal slab id", sizeof("CLIENT_ERROR Illegal slab id") - 1)) { + memcached_error_free(*instance); + memcached_error_free(*memc); + } else { + return response_rc; } } + else + { + // IO error of some sort must have occurred + return response_rc; + } } } -error: - if (rc == MEMCACHED_END) - { - return MEMCACHED_SUCCESS; - } - else - { - return rc; - } + return memcached_has_current_error(*memc) ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS; } -memcached_return_t memcached_dump(memcached_st *ptr, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks) +memcached_return_t memcached_dump(memcached_st *shell, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks) { + Memcached* ptr= memcached2Memcached(shell); memcached_return_t rc; if (memcached_failed(rc= initialize_query(ptr, true))) { @@ -151,9 +162,9 @@ memcached_return_t memcached_dump(memcached_st *ptr, memcached_dump_fn *callback No support for Binary protocol yet @todo Fix this so that we just flush, switch to ascii, and then go back to binary. */ - if (ptr->flags.binary_protocol) + if (memcached_is_binary(ptr)) { - return MEMCACHED_FAILURE; + return memcached_set_error(*ptr, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT, memcached_literal_param("Binary protocol is not supported for memcached_dump()")); } return ascii_dump(ptr, callback, context, number_of_callbacks);