3 * Author: Mingqiang Zhuang
5 * Created on February 10, 2009
7 * (c) Copyright 2009, Schooner Information Technology, Inc.
8 * http://www.schoonerinfotech.com/
20 #include <netinet/tcp.h>
21 #include <arpa/inet.h>
22 #include "ms_setting.h"
23 #include "ms_thread.h"
24 #include "ms_atomic.h"
26 /* for network write */
27 #define TRANSMIT_COMPLETE 0
28 #define TRANSMIT_INCOMPLETE 1
29 #define TRANSMIT_SOFT_ERROR 2
30 #define TRANSMIT_HARD_ERROR 3
32 /* for generating key */
33 #define KEY_PREFIX_BASE 0x1010101010101010 /* not include ' ' '\r' '\n' '\0' */
34 #define KEY_PREFIX_MASK 0x1010101010101010
36 /* For parse the value length return by server */
38 #define VALUELEN_TOKEN 3
40 /* global increasing counter, to ensure the key prefix unique */
41 static uint64_t key_prefix_seq
= KEY_PREFIX_BASE
;
43 /* global increasing counter, generating request id for UDP */
44 static volatile uint32_t udp_request_id
= 0;
46 extern pthread_key_t ms_thread_key
;
48 /* generate upd request id */
49 static uint32_t ms_get_udp_request_id(void);
52 /* connect initialize */
53 static void ms_task_init(ms_conn_t
*c
);
54 static int ms_conn_udp_init(ms_conn_t
*c
, const bool is_udp
);
55 static int ms_conn_sock_init(ms_conn_t
*c
);
56 static int ms_conn_event_init(ms_conn_t
*c
);
57 static int ms_conn_init(ms_conn_t
*c
,
59 const int read_buffer_size
,
61 static void ms_warmup_num_init(ms_conn_t
*c
);
62 static int ms_item_win_init(ms_conn_t
*c
);
65 /* connection close */
66 void ms_conn_free(ms_conn_t
*c
);
67 static void ms_conn_close(ms_conn_t
*c
);
70 /* create network connection */
71 static int ms_new_socket(struct addrinfo
*ai
);
72 static void ms_maximize_sndbuf(const int sfd
);
73 static int ms_network_connect(ms_conn_t
*c
,
78 static int ms_reconn(ms_conn_t
*c
);
82 static int ms_tokenize_command(char *command
,
84 const int max_tokens
);
85 static int ms_ascii_process_line(ms_conn_t
*c
, char *command
);
86 static int ms_try_read_line(ms_conn_t
*c
);
87 static int ms_sort_udp_packet(ms_conn_t
*c
, char *buf
, int rbytes
);
88 static int ms_udp_read(ms_conn_t
*c
, char *buf
, int len
);
89 static int ms_try_read_network(ms_conn_t
*c
);
90 static void ms_verify_value(ms_conn_t
*c
,
91 ms_mlget_task_item_t
*mlget_item
,
94 static void ms_ascii_complete_nread(ms_conn_t
*c
);
95 static void ms_bin_complete_nread(ms_conn_t
*c
);
96 static void ms_complete_nread(ms_conn_t
*c
);
100 static int ms_add_msghdr(ms_conn_t
*c
);
101 static int ms_ensure_iov_space(ms_conn_t
*c
);
102 static int ms_add_iov(ms_conn_t
*c
, const void *buf
, int len
);
103 static int ms_build_udp_headers(ms_conn_t
*c
);
104 static int ms_transmit(ms_conn_t
*c
);
107 /* status adjustment */
108 static void ms_conn_shrink(ms_conn_t
*c
);
109 static void ms_conn_set_state(ms_conn_t
*c
, int state
);
110 static bool ms_update_event(ms_conn_t
*c
, const int new_flags
);
111 static int ms_get_rep_sock_index(ms_conn_t
*c
, int cmd
);
112 static int ms_get_next_sock_index(ms_conn_t
*c
);
113 static int ms_update_conn_sock_event(ms_conn_t
*c
);
114 static bool ms_need_yield(ms_conn_t
*c
);
115 static void ms_update_start_time(ms_conn_t
*c
);
119 static void ms_drive_machine(ms_conn_t
*c
);
120 void ms_event_handler(const int fd
, const short which
, void *arg
);
124 static int ms_build_ascii_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
);
125 static int ms_build_ascii_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
);
126 static int ms_build_ascii_write_buf_mlget(ms_conn_t
*c
);
129 /* binary protocol */
130 static int ms_bin_process_response(ms_conn_t
*c
);
131 static void ms_add_bin_header(ms_conn_t
*c
,
136 static void ms_add_key_to_iov(ms_conn_t
*c
, ms_task_item_t
*item
);
137 static int ms_build_bin_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
);
138 static int ms_build_bin_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
);
139 static int ms_build_bin_write_buf_mlget(ms_conn_t
*c
);
143 * each key has two parts, prefix and suffix. The suffix is a
144 * string random get form the character table. The prefix is a
145 * uint64_t variable. And the prefix must be unique. we use the
146 * prefix to identify a key. And the prefix can't include
147 * character ' ' '\r' '\n' '\0'.
151 uint64_t ms_get_key_prefix(void)
155 pthread_mutex_lock(&ms_global
.seq_mutex
);
156 key_prefix_seq
|= KEY_PREFIX_MASK
;
157 key_prefix
= key_prefix_seq
;
159 pthread_mutex_unlock(&ms_global
.seq_mutex
);
162 } /* ms_get_key_prefix */
166 * get an unique udp request id
168 * @return an unique UDP request id
170 static uint32_t ms_get_udp_request_id(void)
172 return atomic_add_32_nv(&udp_request_id
, 1);
177 * initialize current task structure
179 * @param c, pointer of the concurrency
181 static void ms_task_init(ms_conn_t
*c
)
183 c
->curr_task
.cmd
= CMD_NULL
;
184 c
->curr_task
.item
= 0;
185 c
->curr_task
.verify
= false;
186 c
->curr_task
.finish_verify
= true;
187 c
->curr_task
.get_miss
= true;
189 c
->curr_task
.get_opt
= 0;
190 c
->curr_task
.set_opt
= 0;
191 c
->curr_task
.cycle_undo_get
= 0;
192 c
->curr_task
.cycle_undo_set
= 0;
193 c
->curr_task
.verified_get
= 0;
194 c
->curr_task
.overwrite_set
= 0;
199 * initialize udp for the connection structure
201 * @param c, pointer of the concurrency
202 * @param is_udp, whether it's udp
204 * @return int, if success, return 0, else return -1
206 static int ms_conn_udp_init(ms_conn_t
*c
, const bool is_udp
)
212 c
->rudpsize
= UDP_DATA_BUFFER_SIZE
;
223 if (c
->udp
|| (! c
->udp
&& ms_setting
.facebook_test
))
225 c
->rudpbuf
= (char *)malloc((size_t)c
->rudpsize
);
226 c
->udppkt
= (ms_udppkt_t
*)malloc(MAX_UDP_PACKET
* sizeof(ms_udppkt_t
));
228 if ((c
->rudpbuf
== NULL
) || (c
->udppkt
== NULL
))
230 if (c
->rudpbuf
!= NULL
)
232 if (c
->udppkt
!= NULL
)
234 fprintf(stderr
, "malloc()\n");
237 memset(c
->udppkt
, 0, MAX_UDP_PACKET
* sizeof(ms_udppkt_t
));
241 } /* ms_conn_udp_init */
245 * initialize the connection structure
247 * @param c, pointer of the concurrency
248 * @param init_state, (conn_read, conn_write, conn_closing)
249 * @param read_buffer_size
250 * @param is_udp, whether it's udp
252 * @return int, if success, return 0, else return -1
254 static int ms_conn_init(ms_conn_t
*c
,
255 const int init_state
,
256 const int read_buffer_size
,
265 c
->rsize
= read_buffer_size
;
266 c
->wsize
= WRITE_BUFFER_SIZE
;
267 c
->iovsize
= IOV_LIST_INITIAL
;
268 c
->msgsize
= MSG_LIST_INITIAL
;
270 /* for replication, each connection need connect all the server */
271 if (ms_setting
.rep_write_srv
> 0)
273 c
->total_sfds
= ms_setting
.srv_cnt
;
277 c
->total_sfds
= ms_setting
.sock_per_conn
;
281 c
->rbuf
= (char *)malloc((size_t)c
->rsize
);
282 c
->wbuf
= (char *)malloc((size_t)c
->wsize
);
283 c
->iov
= (struct iovec
*)malloc(sizeof(struct iovec
) * (size_t)c
->iovsize
);
284 c
->msglist
= (struct msghdr
*)malloc(
285 sizeof(struct msghdr
) * (size_t)c
->msgsize
);
286 if (ms_setting
.mult_key_num
> 1)
288 c
->mlget_task
.mlget_item
= (ms_mlget_task_item_t
*)
290 sizeof(ms_mlget_task_item_t
) * (size_t)ms_setting
.mult_key_num
);
292 c
->tcpsfd
= (int *)malloc((size_t)c
->total_sfds
* sizeof(int));
294 if ((c
->rbuf
== NULL
) || (c
->wbuf
== NULL
) || (c
->iov
== NULL
)
295 || (c
->msglist
== NULL
) || (c
->tcpsfd
== NULL
)
296 || ((ms_setting
.mult_key_num
> 1)
297 && (c
->mlget_task
.mlget_item
== NULL
)))
305 if (c
->msglist
!= NULL
)
307 if (c
->mlget_task
.mlget_item
!= NULL
)
308 free(c
->mlget_task
.mlget_item
);
309 if (c
->tcpsfd
!= NULL
)
311 fprintf(stderr
, "malloc()\n");
315 c
->state
= init_state
;
323 c
->cur_idx
= c
->total_sfds
; /* default index is a invalid value */
327 c
->change_sfd
= false;
329 c
->precmd
.cmd
= c
->currcmd
.cmd
= CMD_NULL
;
330 c
->precmd
.isfinish
= true; /* default the previous command finished */
331 c
->currcmd
.isfinish
= false;
332 c
->precmd
.retstat
= c
->currcmd
.retstat
= MCD_FAILURE
;
333 c
->precmd
.key_prefix
= c
->currcmd
.key_prefix
= 0;
335 c
->mlget_task
.mlget_num
= 0;
336 c
->mlget_task
.value_index
= -1; /* default invalid value */
338 if (ms_setting
.binary_prot
)
340 c
->protocol
= binary_prot
;
344 c
->protocol
= ascii_udp_prot
;
348 c
->protocol
= ascii_prot
;
352 if (ms_conn_udp_init(c
, is_udp
) != 0)
357 /* initialize task */
360 if (! (ms_setting
.facebook_test
&& is_udp
))
362 atomic_add_32(&ms_stats
.active_conns
, 1);
370 * when doing 100% get operation, it could preset some objects
371 * to warmup the server. this function is used to initialize the
372 * number of the objects to preset.
374 * @param c, pointer of the concurrency
376 static void ms_warmup_num_init(ms_conn_t
*c
)
378 /* no set operation, preset all the items in the window */
379 if (ms_setting
.cmd_distr
[CMD_SET
].cmd_prop
< PROP_ERROR
)
381 c
->warmup_num
= c
->win_size
;
382 c
->remain_warmup_num
= c
->warmup_num
;
387 c
->remain_warmup_num
= c
->warmup_num
;
389 } /* ms_warmup_num_init */
393 * each connection has an item window, this function initialize
394 * the window. The window is used to generate task.
396 * @param c, pointer of the concurrency
398 * @return int, if success, return 0, else return -1
400 static int ms_item_win_init(ms_conn_t
*c
)
402 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
405 c
->win_size
= (int)ms_setting
.win_size
;
407 c
->exec_num
= ms_thread
->thread_ctx
->exec_num_perconn
;
408 c
->remain_exec_num
= c
->exec_num
;
410 c
->item_win
= (ms_task_item_t
*)malloc(
411 sizeof(ms_task_item_t
) * (size_t)c
->win_size
);
412 if (c
->item_win
== NULL
)
414 fprintf(stderr
, "Can't allocate task item array for conn.\n");
417 memset(c
->item_win
, 0, sizeof(ms_task_item_t
) * (size_t)c
->win_size
);
419 for (int i
= 0; i
< c
->win_size
; i
++)
421 c
->item_win
[i
].key_size
= (int)ms_setting
.distr
[i
].key_size
;
422 c
->item_win
[i
].key_prefix
= ms_get_key_prefix();
423 c
->item_win
[i
].key_suffix_offset
= ms_setting
.distr
[i
].key_offset
;
424 c
->item_win
[i
].value_size
= (int)ms_setting
.distr
[i
].value_size
;
425 c
->item_win
[i
].value_offset
= INVALID_OFFSET
; /* default in invalid offset */
426 c
->item_win
[i
].client_time
= 0;
428 /* set expire time base on the proportion */
429 if (exp_cnt
< ms_setting
.exp_ver_per
* i
)
431 c
->item_win
[i
].exp_time
= FIXED_EXPIRE_TIME
;
436 c
->item_win
[i
].exp_time
= 0;
440 ms_warmup_num_init(c
);
443 } /* ms_item_win_init */
447 * each connection structure can include one or more sock
448 * handlers. this function create these socks and connect the
451 * @param c, pointer of the concurrency
453 * @return int, if success, return 0, else return -1
455 static int ms_conn_sock_init(ms_conn_t
*c
)
457 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
463 assert(c
->tcpsfd
!= NULL
);
465 for (i
= 0; i
< c
->total_sfds
; i
++)
468 if (ms_setting
.rep_write_srv
> 0)
470 /* for replication, each connection need connect all the server */
475 /* all the connections in a thread connects the same server */
476 srv_idx
= ms_thread
->thread_ctx
->srv_idx
;
479 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
480 ms_setting
.servers
[srv_idx
].srv_port
,
481 ms_setting
.udp
, &ret_sfd
) != 0)
491 if (! ms_setting
.udp
)
493 c
->tcpsfd
[i
]= ret_sfd
;
499 /* initialize udp sock handler if necessary */
500 if (ms_setting
.facebook_test
)
503 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
504 ms_setting
.servers
[srv_idx
].srv_port
,
505 true, &ret_sfd
) != 0)
515 if ((i
!= c
->total_sfds
) || (ms_setting
.facebook_test
&& (c
->udpsfd
== 0)))
523 for (int j
= 0; j
< i
; j
++)
538 } /* ms_conn_sock_init */
542 * each connection is managed by libevent, this function
543 * initialize the event of the connection structure.
545 * @param c, pointer of the concurrency
547 * @return int, if success, return 0, else return -1
549 static int ms_conn_event_init(ms_conn_t
*c
)
551 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
552 /* default event timeout 10 seconds */
555 .tv_sec
= EVENT_TIMEOUT
, .tv_usec
= 0
557 short event_flags
= EV_WRITE
| EV_PERSIST
;
559 event_set(&c
->event
, c
->sfd
, event_flags
, ms_event_handler
, (void *)c
);
560 event_base_set(ms_thread
->base
, &c
->event
);
561 c
->ev_flags
= event_flags
;
563 if (c
->total_sfds
== 1)
565 if (event_add(&c
->event
, NULL
) == -1)
572 if (event_add(&c
->event
, &t
) == -1)
579 } /* ms_conn_event_init */
583 * setup a connection, each connection structure of each
584 * thread must call this function to initialize.
586 * @param c, pointer of the concurrency
588 * @return int, if success, return 0, else return -1
590 int ms_setup_conn(ms_conn_t
*c
)
592 if (ms_item_win_init(c
) != 0)
597 if (ms_conn_init(c
, conn_write
, DATA_BUFFER_SIZE
, ms_setting
.udp
) != 0)
602 if (ms_conn_sock_init(c
) != 0)
607 if (ms_conn_event_init(c
) != 0)
613 } /* ms_setup_conn */
617 * Frees a connection.
619 * @param c, pointer of the concurrency
621 void ms_conn_free(ms_conn_t
*c
)
623 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
626 if (c
->hdrbuf
!= NULL
)
628 if (c
->msglist
!= NULL
)
636 if (c
->mlget_task
.mlget_item
!= NULL
)
637 free(c
->mlget_task
.mlget_item
);
638 if (c
->rudpbuf
!= NULL
)
640 if (c
->udppkt
!= NULL
)
642 if (c
->item_win
!= NULL
)
644 if (c
->tcpsfd
!= NULL
)
647 if (--ms_thread
->nactive_conn
== 0)
649 free(ms_thread
->conn
);
658 * @param c, pointer of the concurrency
660 static void ms_conn_close(ms_conn_t
*c
)
662 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
665 /* delete the event, the socket and the connection */
666 event_del(&c
->event
);
668 for (int i
= 0; i
< c
->total_sfds
; i
++)
670 if (c
->tcpsfd
[i
] > 0)
677 if (ms_setting
.facebook_test
)
682 atomic_dec_32(&ms_stats
.active_conns
);
686 if (ms_setting
.run_time
== 0)
688 pthread_mutex_lock(&ms_global
.run_lock
.lock
);
689 ms_global
.run_lock
.count
++;
690 pthread_cond_signal(&ms_global
.run_lock
.cond
);
691 pthread_mutex_unlock(&ms_global
.run_lock
.lock
);
694 if (ms_thread
->nactive_conn
== 0)
698 } /* ms_conn_close */
704 * @param ai, server address information
706 * @return int, if success, return 0, else return -1
708 static int ms_new_socket(struct addrinfo
*ai
)
712 if ((sfd
= socket(ai
->ai_family
, ai
->ai_socktype
, ai
->ai_protocol
)) == -1)
714 fprintf(stderr
, "socket() error: %s.\n", strerror(errno
));
719 } /* ms_new_socket */
723 * Sets a socket's send buffer size to the maximum allowed by the system.
725 * @param sfd, file descriptor of socket
727 static void ms_maximize_sndbuf(const int sfd
)
729 socklen_t intsize
= sizeof(int);
730 unsigned int last_good
= 0;
731 unsigned int min
, max
, avg
;
732 unsigned int old_size
;
734 /* Start with the default size. */
735 if (getsockopt(sfd
, SOL_SOCKET
, SO_SNDBUF
, &old_size
, &intsize
) != 0)
737 fprintf(stderr
, "getsockopt(SO_SNDBUF)\n");
741 /* Binary-search for the real maximum. */
743 max
= MAX_SENDBUF_SIZE
;
747 avg
= ((unsigned int)(min
+ max
)) / 2;
748 if (setsockopt(sfd
, SOL_SOCKET
, SO_SNDBUF
, (void *)&avg
, intsize
) == 0)
758 } /* ms_maximize_sndbuf */
762 * socket connects the server
764 * @param c, pointer of the concurrency
765 * @param srv_host_name, the host name of the server
766 * @param srv_port, port of server
767 * @param is_udp, whether it's udp
768 * @param ret_sfd, the connected socket file descriptor
770 * @return int, if success, return 0, else return -1
772 static int ms_network_connect(ms_conn_t
*c
,
784 struct addrinfo
*next
;
785 struct addrinfo hints
;
786 char port_buf
[NI_MAXSERV
];
793 * the memset call clears nonstandard fields in some impementations
794 * that otherwise mess things up.
796 memset(&hints
, 0, sizeof(hints
));
797 hints
.ai_flags
= AI_PASSIVE
| AI_ADDRCONFIG
;
800 hints
.ai_protocol
= IPPROTO_UDP
;
801 hints
.ai_socktype
= SOCK_DGRAM
;
802 hints
.ai_family
= AF_INET
; /* This left here because of issues with OSX 10.5 */
806 hints
.ai_family
= AF_UNSPEC
;
807 hints
.ai_protocol
= IPPROTO_TCP
;
808 hints
.ai_socktype
= SOCK_STREAM
;
811 snprintf(port_buf
, NI_MAXSERV
, "%d", srv_port
);
812 error
= getaddrinfo(srv_host_name
, port_buf
, &hints
, &ai
);
815 if (error
!= EAI_SYSTEM
)
816 fprintf(stderr
, "getaddrinfo(): %s.\n", gai_strerror(error
));
818 perror("getaddrinfo()\n");
823 for (next
= ai
; next
; next
= next
->ai_next
)
825 if ((sfd
= ms_new_socket(next
)) == -1)
831 setsockopt(sfd
, SOL_SOCKET
, SO_REUSEADDR
, (void *)&flags
, sizeof(flags
));
834 ms_maximize_sndbuf(sfd
);
838 setsockopt(sfd
, SOL_SOCKET
, SO_KEEPALIVE
, (void *)&flags
,
840 setsockopt(sfd
, SOL_SOCKET
, SO_LINGER
, (void *)&ling
, sizeof(ling
));
841 setsockopt(sfd
, IPPROTO_TCP
, TCP_NODELAY
, (void *)&flags
,
847 c
->srv_recv_addr_size
= sizeof(struct sockaddr
);
848 memcpy(&c
->srv_recv_addr
, next
->ai_addr
, c
->srv_recv_addr_size
);
852 if (connect(sfd
, next
->ai_addr
, next
->ai_addrlen
) == -1)
860 if (((flags
= fcntl(sfd
, F_GETFL
, 0)) < 0)
861 || (fcntl(sfd
, F_SETFL
, flags
| O_NONBLOCK
) < 0))
863 fprintf(stderr
, "setting O_NONBLOCK\n");
879 /* Return zero if we detected no errors in starting up connections */
881 } /* ms_network_connect */
885 * reconnect a disconnected sock
887 * @param c, pointer of the concurrency
889 * @return int, if success, return 0, else return -1
891 static int ms_reconn(ms_conn_t
*c
)
893 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
895 int32_t srv_conn_cnt
= 0;
897 if (ms_setting
.rep_write_srv
> 0)
900 srv_conn_cnt
= ms_setting
.nconns
;
904 srv_idx
= ms_thread
->thread_ctx
->srv_idx
;
905 srv_conn_cnt
= ms_setting
.nconns
/ ms_setting
.srv_cnt
;
908 /* close the old socket handler */
910 c
->tcpsfd
[c
->cur_idx
]= 0;
912 if (atomic_add_32_nv((volatile uint32_t *)&ms_setting
.servers
[srv_idx
].disconn_cnt
, 1)
915 gettimeofday(&ms_setting
.servers
[srv_idx
].disconn_time
, NULL
);
916 fprintf(stderr
, "Server %s:%d disconnect\n",
917 ms_setting
.servers
[srv_idx
].srv_host_name
,
918 ms_setting
.servers
[srv_idx
].srv_port
);
921 if (ms_setting
.rep_write_srv
> 0)
924 for (i
= 0; i
< c
->total_sfds
; i
++)
926 if (c
->tcpsfd
[i
] != 0)
932 /* all socks disconnect */
933 if (i
== c
->total_sfds
)
942 /* reconnect success, break the loop */
943 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
944 ms_setting
.servers
[srv_idx
].srv_port
,
945 ms_setting
.udp
, &c
->sfd
) == 0)
947 c
->tcpsfd
[c
->cur_idx
]= c
->sfd
;
948 if (atomic_add_32_nv((volatile uint32_t *)(&ms_setting
.servers
[srv_idx
].reconn_cnt
), 1)
951 gettimeofday(&ms_setting
.servers
[srv_idx
].reconn_time
, NULL
);
953 (int)(ms_setting
.servers
[srv_idx
].reconn_time
.tv_sec
954 - ms_setting
.servers
[srv_idx
].disconn_time
956 fprintf(stderr
, "Server %s:%d reconnect after %ds\n",
957 ms_setting
.servers
[srv_idx
].srv_host_name
,
958 ms_setting
.servers
[srv_idx
].srv_port
, reconn_time
);
963 if (c
->total_sfds
== 1)
965 /* wait a second and reconnect */
969 while (c
->total_sfds
== 1);
972 if ((c
->total_sfds
> 1) && (c
->tcpsfd
[c
->cur_idx
] == 0))
983 * reconnect several disconnected socks in the connection
984 * structure, the ever-1-second timer of the thread will check
985 * whether some socks in the connections disconnect. if
986 * disconnect, reconnect the sock.
988 * @param c, pointer of the concurrency
990 * @return int, if success, return 0, else return -1
992 int ms_reconn_socks(ms_conn_t
*c
)
994 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
998 struct timeval cur_time
;
1002 if ((c
->total_sfds
== 1) || (c
->total_sfds
== c
->alive_sfds
))
1007 for (int i
= 0; i
< c
->total_sfds
; i
++)
1009 if (c
->tcpsfd
[i
] == 0)
1011 gettimeofday(&cur_time
, NULL
);
1014 * For failover test of replication, reconnect the socks after
1015 * it disconnects more than 5 seconds, Otherwise memslap will
1016 * block at connect() function and the work threads can't work
1020 - ms_setting
.servers
[srv_idx
].disconn_time
.tv_sec
< 5)
1025 if (ms_setting
.rep_write_srv
> 0)
1028 srv_conn_cnt
= ms_setting
.nconns
;
1032 srv_idx
= ms_thread
->thread_ctx
->srv_idx
;
1033 srv_conn_cnt
= ms_setting
.nconns
/ ms_setting
.srv_cnt
;
1036 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
1037 ms_setting
.servers
[srv_idx
].srv_port
,
1038 ms_setting
.udp
, &ret_sfd
) == 0)
1040 c
->tcpsfd
[i
]= ret_sfd
;
1043 if (atomic_add_32_nv((volatile uint32_t *)(&ms_setting
.servers
[srv_idx
].reconn_cnt
), 1)
1044 % srv_conn_cnt
== 0)
1046 gettimeofday(&ms_setting
.servers
[srv_idx
].reconn_time
, NULL
);
1048 (int)(ms_setting
.servers
[srv_idx
].reconn_time
.tv_sec
1049 - ms_setting
.servers
[srv_idx
].disconn_time
1051 fprintf(stderr
, "Server %s:%d reconnect after %ds\n",
1052 ms_setting
.servers
[srv_idx
].srv_host_name
,
1053 ms_setting
.servers
[srv_idx
].srv_port
, reconn_time
);
1060 } /* ms_reconn_socks */
1064 * Tokenize the command string by replacing whitespace with '\0' and update
1065 * the token array tokens with pointer to start of each token and length.
1066 * Returns total number of tokens. The last valid token is the terminal
1067 * token (value points to the first unprocessed character of the string and
1072 * while(ms_tokenize_command(command, ncommand, tokens, max_tokens) > 0) {
1073 * for(int ix = 0; tokens[ix].length != 0; ix++) {
1076 * ncommand = tokens[ix].value - command;
1077 * command = tokens[ix].value;
1080 * @param command, the command string to token
1081 * @param tokens, array to store tokens
1082 * @param max_tokens, maximum tokens number
1084 * @return int, the number of tokens
1086 static int ms_tokenize_command(char *command
,
1088 const int max_tokens
)
1093 assert(command
!= NULL
&& tokens
!= NULL
&& max_tokens
> 1);
1095 for (s
= e
= command
; ntokens
< max_tokens
- 1; ++e
)
1101 tokens
[ntokens
].value
= s
;
1102 tokens
[ntokens
].length
= (size_t)(e
- s
);
1108 else if (*e
== '\0')
1112 tokens
[ntokens
].value
= s
;
1113 tokens
[ntokens
].length
= (size_t)(e
- s
);
1117 break; /* string end */
1122 } /* ms_tokenize_command */
1126 * parse the response of server.
1128 * @param c, pointer of the concurrency
1129 * @param command, the string responded by server
1131 * @return int, if the command completed return 0, else return
1134 static int ms_ascii_process_line(ms_conn_t
*c
, char *command
)
1138 char *buffer
= command
;
1143 * for command get, we store the returned value into local buffer
1144 * then continue in ms_complete_nread().
1149 case 'V': /* VALUE || VERSION */
1150 if (buffer
[1] == 'A') /* VALUE */
1152 token_t tokens
[MAX_TOKENS
];
1153 ms_tokenize_command(command
, tokens
, MAX_TOKENS
);
1154 value_len
= strtol(tokens
[VALUELEN_TOKEN
].value
, NULL
, 10);
1155 c
->currcmd
.key_prefix
= *(uint64_t *)tokens
[KEY_TOKEN
].value
;
1158 * We read the \r\n into the string since not doing so is more
1159 * cycles then the waster of memory to do so.
1161 * We are null terminating through, which will most likely make
1162 * some people lazy about using the return length.
1164 c
->rvbytes
= (int)(value_len
+ 2);
1172 c
->currcmd
.retstat
= MCD_SUCCESS
;
1174 case 'S': /* STORED STATS SERVER_ERROR */
1175 if (buffer
[2] == 'A') /* STORED STATS */
1177 c
->currcmd
.retstat
= MCD_STAT
;
1179 else if (buffer
[1] == 'E')
1182 printf("<%d %s\n", c
->sfd
, buffer
);
1184 c
->currcmd
.retstat
= MCD_SERVER_ERROR
;
1186 else if (buffer
[1] == 'T')
1189 c
->currcmd
.retstat
= MCD_STORED
;
1193 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1197 case 'D': /* DELETED DATA */
1198 if (buffer
[1] == 'E')
1200 c
->currcmd
.retstat
= MCD_DELETED
;
1204 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1209 case 'N': /* NOT_FOUND NOT_STORED*/
1210 if (buffer
[4] == 'F')
1212 c
->currcmd
.retstat
= MCD_NOTFOUND
;
1214 else if (buffer
[4] == 'S')
1216 printf("<%d %s\n", c
->sfd
, buffer
);
1217 c
->currcmd
.retstat
= MCD_NOTSTORED
;
1221 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1225 case 'E': /* PROTOCOL ERROR or END */
1226 if (buffer
[1] == 'N')
1229 c
->currcmd
.retstat
= MCD_END
;
1231 else if (buffer
[1] == 'R')
1233 printf("<%d ERROR\n", c
->sfd
);
1234 c
->currcmd
.retstat
= MCD_PROTOCOL_ERROR
;
1236 else if (buffer
[1] == 'X')
1238 c
->currcmd
.retstat
= MCD_DATA_EXISTS
;
1239 printf("<%d %s\n", c
->sfd
, buffer
);
1243 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1247 case 'C': /* CLIENT ERROR */
1248 printf("<%d %s\n", c
->sfd
, buffer
);
1249 c
->currcmd
.retstat
= MCD_CLIENT_ERROR
;
1253 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1258 } /* ms_ascii_process_line */
1262 * after one operation completes, reset the concurrency
1264 * @param c, pointer of the concurrency
1265 * @param timeout, whether it's timeout
1267 void ms_reset_conn(ms_conn_t
*c
, bool timeout
)
1273 if ((c
->packets
> 0) && (c
->packets
< MAX_UDP_PACKET
))
1275 memset(c
->udppkt
, 0, sizeof(ms_udppkt_t
) * (uint64_t)c
->packets
);
1284 c
->currcmd
.isfinish
= true;
1288 ms_conn_set_state(c
, conn_write
);
1289 memcpy(&c
->precmd
, &c
->currcmd
, sizeof(ms_cmdstat_t
)); /* replicate command state */
1293 ms_drive_machine(c
);
1295 } /* ms_reset_conn */
1299 * if we have a complete line in the buffer, process it.
1301 * @param c, pointer of the concurrency
1303 * @return int, if success, return 0, else return -1
1305 static int ms_try_read_line(ms_conn_t
*c
)
1307 if (c
->protocol
== binary_prot
)
1309 /* Do we have the complete packet header? */
1310 if ((uint64_t)c
->rbytes
< sizeof(c
->binary_header
))
1312 /* need more data! */
1318 if (((long)(c
->rcurr
)) % 8 != 0)
1320 /* must realign input buffer */
1321 memmove(c
->rbuf
, c
->rcurr
, c
->rbytes
);
1323 if (settings
.verbose
)
1325 fprintf(stderr
, "%d: Realign input buffer.\n", c
->sfd
);
1329 protocol_binary_response_header
*rsp
;
1330 rsp
= (protocol_binary_response_header
*)c
->rcurr
;
1332 c
->binary_header
= *rsp
;
1333 c
->binary_header
.response
.extlen
= rsp
->response
.extlen
;
1334 c
->binary_header
.response
.keylen
= ntohl(rsp
->response
.keylen
);
1335 c
->binary_header
.response
.bodylen
= ntohl(rsp
->response
.bodylen
);
1336 c
->binary_header
.response
.status
= ntohl(rsp
->response
.status
);
1338 if (c
->binary_header
.response
.magic
!= PROTOCOL_BINARY_RES
)
1340 fprintf(stderr
, "Invalid magic: %x\n",
1341 c
->binary_header
.response
.magic
);
1342 ms_conn_set_state(c
, conn_closing
);
1346 /* process this complete response */
1347 if (ms_bin_process_response(c
) == 0)
1349 /* current operation completed */
1350 ms_reset_conn(c
, false);
1355 c
->rbytes
-= (int32_t)sizeof(c
->binary_header
);
1356 c
->rcurr
+= sizeof(c
->binary_header
);
1365 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1370 el
= memchr(c
->rcurr
, '\n', (size_t)c
->rbytes
);
1375 if (((el
- c
->rcurr
) > 1) && (*(el
- 1) == '\r'))
1381 assert(cont
<= (c
->rcurr
+ c
->rbytes
));
1383 /* process this complete line */
1384 if (ms_ascii_process_line(c
, c
->rcurr
) == 0)
1386 /* current operation completed */
1387 ms_reset_conn(c
, false);
1392 /* current operation didn't complete */
1393 c
->rbytes
-= (int32_t)(cont
- c
->rcurr
);
1397 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1401 } /* ms_try_read_line */
1405 * because the packet of UDP can't ensure the order, the
1406 * function is used to sort the received udp packet.
1408 * @param c, pointer of the concurrency
1409 * @param buf, the buffer to store the ordered packages data
1410 * @param rbytes, the maximum capacity of the buffer
1412 * @return int, if success, return the copy bytes, else return
1415 static int ms_sort_udp_packet(ms_conn_t
*c
, char *buf
, int rbytes
)
1420 uint16_t seq_num
= 0;
1421 uint16_t packets
= 0;
1422 unsigned char *header
= NULL
;
1424 /* no enough data */
1426 assert(buf
!= NULL
);
1427 assert(c
->rudpbytes
>= UDP_HEADER_SIZE
);
1429 /* calculate received packets count */
1430 if (c
->rudpbytes
% UDP_MAX_PAYLOAD_SIZE
>= UDP_HEADER_SIZE
)
1432 /* the last packet has some data */
1433 c
->recvpkt
= c
->rudpbytes
/ UDP_MAX_PAYLOAD_SIZE
+ 1;
1437 c
->recvpkt
= c
->rudpbytes
/ UDP_MAX_PAYLOAD_SIZE
;
1440 /* get the total packets count if necessary */
1441 if (c
->packets
== 0)
1443 c
->packets
= HEADER_TO_PACKETS((unsigned char *)c
->rudpbuf
);
1446 /* build the ordered packet array */
1447 for (int i
= c
->pktcurr
; i
< c
->recvpkt
; i
++)
1449 header
= (unsigned char *)c
->rudpbuf
+ i
* UDP_MAX_PAYLOAD_SIZE
;
1450 req_id
= (uint16_t)HEADER_TO_REQID(header
);
1451 assert(req_id
== c
->request_id
% (1 << 16));
1453 packets
= (uint16_t)HEADER_TO_PACKETS(header
);
1454 assert(c
->packets
== HEADER_TO_PACKETS(header
));
1456 seq_num
= (uint16_t)HEADER_TO_SEQNUM(header
);
1457 c
->udppkt
[seq_num
].header
= header
;
1458 c
->udppkt
[seq_num
].data
= (char *)header
+ UDP_HEADER_SIZE
;
1460 if (i
== c
->recvpkt
- 1)
1462 /* last received packet */
1463 if (c
->rudpbytes
% UDP_MAX_PAYLOAD_SIZE
== 0)
1465 c
->udppkt
[seq_num
].rbytes
= UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
;
1470 c
->udppkt
[seq_num
].rbytes
= c
->rudpbytes
% UDP_MAX_PAYLOAD_SIZE
1476 c
->udppkt
[seq_num
].rbytes
= UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
;
1481 for (int i
= c
->ordcurr
; i
< c
->recvpkt
; i
++)
1483 /* there is some data to copy */
1484 if ((c
->udppkt
[i
].data
!= NULL
)
1485 && (c
->udppkt
[i
].copybytes
< c
->udppkt
[i
].rbytes
))
1487 header
= c
->udppkt
[i
].header
;
1488 len
= c
->udppkt
[i
].rbytes
- c
->udppkt
[i
].copybytes
;
1489 if (len
> rbytes
- wbytes
)
1491 len
= rbytes
- wbytes
;
1494 assert(len
<= rbytes
- wbytes
);
1495 assert(i
== HEADER_TO_SEQNUM(header
));
1497 memcpy(buf
+ wbytes
, c
->udppkt
[i
].data
+ c
->udppkt
[i
].copybytes
,
1500 c
->udppkt
[i
].copybytes
+= len
;
1502 if ((c
->udppkt
[i
].copybytes
== c
->udppkt
[i
].rbytes
)
1503 && (c
->udppkt
[i
].rbytes
== UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
))
1505 /* finish copying all the data of this packet, next */
1509 /* last received packet, and finish copying all the data */
1510 if ((c
->recvpkt
== c
->packets
) && (i
== c
->recvpkt
- 1)
1511 && (c
->udppkt
[i
].copybytes
== c
->udppkt
[i
].rbytes
))
1516 /* no space to copy data */
1517 if (wbytes
>= rbytes
)
1522 /* it doesn't finish reading all the data of the packet from network */
1523 if ((i
!= c
->recvpkt
- 1)
1524 && (c
->udppkt
[i
].rbytes
< UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
))
1531 /* no data to copy */
1536 return wbytes
== 0 ? -1 : wbytes
;
1537 } /* ms_sort_udp_packet */
1541 * encapsulate upd read like tcp read
1543 * @param c, pointer of the concurrency
1544 * @param buf, read buffer
1545 * @param len, length to read
1547 * @return int, if success, return the read bytes, else return
1550 static int ms_udp_read(ms_conn_t
*c
, char *buf
, int len
)
1561 if (c
->rudpbytes
+ UDP_MAX_PAYLOAD_SIZE
> c
->rudpsize
)
1563 char *new_rbuf
= realloc(c
->rudpbuf
, (size_t)c
->rudpsize
* 2);
1566 fprintf(stderr
, "Couldn't realloc input buffer.\n");
1567 c
->rudpbytes
= 0; /* ignore what we read */
1570 c
->rudpbuf
= new_rbuf
;
1574 avail
= c
->rudpsize
- c
->rudpbytes
;
1575 /* UDP each time read a packet, 1400 bytes */
1576 res
= (int)read(c
->sfd
, c
->rudpbuf
+ c
->rudpbytes
, (size_t)avail
);
1580 atomic_add_64(&ms_stats
.bytes_read
, res
);
1595 /* "connection" closed */
1601 /* no data to read */
1606 /* copy data to read buffer */
1609 copybytes
= ms_sort_udp_packet(c
, buf
, len
);
1612 if (copybytes
== -1)
1614 atomic_add_64(&ms_stats
.pkt_disorder
, 1);
1622 * read from network as much as we can, handle buffer overflow and connection
1624 * before reading, move the remaining incomplete fragment of a command
1625 * (if any) to the beginning of the buffer.
1626 * return 0 if there's nothing to read on the first read.
1630 * read from network as much as we can, handle buffer overflow and connection
1631 * close. before reading, move the remaining incomplete fragment of a command
1632 * (if any) to the beginning of the buffer.
1634 * @param c, pointer of the concurrency
1637 * return 0 if there's nothing to read on the first read.
1638 * return 1 if get data
1639 * return -1 if error happens
1641 static int ms_try_read_network(ms_conn_t
*c
)
1649 if ((c
->rcurr
!= c
->rbuf
)
1650 && (! c
->readval
|| (c
->rvbytes
> c
->rsize
- (c
->rcurr
- c
->rbuf
))
1651 || (c
->readval
&& (c
->rcurr
- c
->rbuf
> c
->rbytes
))))
1653 if (c
->rbytes
!= 0) /* otherwise there's nothing to copy */
1654 memmove(c
->rbuf
, c
->rcurr
, (size_t)c
->rbytes
);
1660 if (c
->rbytes
>= c
->rsize
)
1662 char *new_rbuf
= realloc(c
->rbuf
, (size_t)c
->rsize
* 2);
1665 fprintf(stderr
, "Couldn't realloc input buffer.\n");
1666 c
->rbytes
= 0; /* ignore what we read */
1669 c
->rcurr
= c
->rbuf
= new_rbuf
;
1673 avail
= c
->rsize
- c
->rbytes
- (c
->rcurr
- c
->rbuf
);
1681 res
= (int32_t)ms_udp_read(c
, c
->rcurr
+ c
->rbytes
, (int32_t)avail
);
1685 res
= (int)read(c
->sfd
, c
->rcurr
+ c
->rbytes
, (size_t)avail
);
1692 atomic_add_64(&ms_stats
.bytes_read
, res
);
1707 /* connection closed */
1708 ms_conn_set_state(c
, conn_closing
);
1713 if ((errno
== EAGAIN
) || (errno
== EWOULDBLOCK
))
1715 /* Should close on unhandled errors. */
1716 ms_conn_set_state(c
, conn_closing
);
1722 } /* ms_try_read_network */
1726 * after get the object from server, verify the value if
1729 * @param c, pointer of the concurrency
1730 * @param mlget_item, pointer of mulit-get task item structure
1731 * @param value, received value string
1732 * @param vlen, received value string length
1734 static void ms_verify_value(ms_conn_t
*c
,
1735 ms_mlget_task_item_t
*mlget_item
,
1739 if (c
->curr_task
.verify
)
1741 assert(c
->curr_task
.item
->value_offset
!= INVALID_OFFSET
);
1742 char *orignval
= &ms_setting
.char_block
[c
->curr_task
.item
->value_offset
];
1744 &ms_setting
.char_block
[c
->curr_task
.item
->key_suffix_offset
];
1746 /* verify expire time if necessary */
1747 if (c
->curr_task
.item
->exp_time
> 0)
1749 struct timeval curr_time
;
1750 gettimeofday(&curr_time
, NULL
);
1752 /* object expired but get it now */
1753 if (curr_time
.tv_sec
- c
->curr_task
.item
->client_time
1754 > c
->curr_task
.item
->exp_time
+ EXPIRE_TIME_ERROR
)
1756 atomic_add_64(&ms_stats
.exp_get
, 1);
1758 if (ms_setting
.verbose
)
1762 strftime(set_time
, 64, "%Y-%m-%d %H:%M:%S",
1763 localtime(&c
->curr_task
.item
->client_time
));
1764 strftime(cur_time
, 64, "%Y-%m-%d %H:%M:%S",
1765 localtime(&curr_time
.tv_sec
));
1767 "\n<%d expire time verification failed, "
1768 "object expired but get it now\n"
1770 "\tkey: %" PRIx64
" %.*s\n"
1771 "\tset time: %s current time: %s "
1772 "diff time: %d expire time: %d\n"
1773 "\texpected data: \n"
1774 "\treceived data len: %d\n"
1775 "\treceived data: %.*s\n",
1777 c
->curr_task
.item
->key_size
,
1778 c
->curr_task
.item
->key_prefix
,
1779 c
->curr_task
.item
->key_size
- (int)KEY_PREFIX_SIZE
,
1783 (int)(curr_time
.tv_sec
- c
->curr_task
.item
->client_time
),
1784 c
->curr_task
.item
->exp_time
,
1794 if ((c
->curr_task
.item
->value_size
!= vlen
)
1795 || (memcmp(orignval
, value
, (size_t)vlen
) != 0))
1797 atomic_add_64(&ms_stats
.vef_failed
, 1);
1799 if (ms_setting
.verbose
)
1802 "\n<%d data verification failed\n"
1804 "\tkey: %" PRIx64
" %.*s\n"
1805 "\texpected data len: %d\n"
1806 "\texpected data: %.*s\n"
1807 "\treceived data len: %d\n"
1808 "\treceived data: %.*s\n",
1810 c
->curr_task
.item
->key_size
,
1811 c
->curr_task
.item
->key_prefix
,
1812 c
->curr_task
.item
->key_size
- (int)KEY_PREFIX_SIZE
,
1814 c
->curr_task
.item
->value_size
,
1815 c
->curr_task
.item
->value_size
,
1825 c
->curr_task
.finish_verify
= true;
1827 if (mlget_item
!= NULL
)
1829 mlget_item
->finish_verify
= true;
1832 } /* ms_verify_value */
1836 * For ASCII protocol, after store the data into the local
1837 * buffer, run this function to handle the data.
1839 * @param c, pointer of the concurrency
1841 static void ms_ascii_complete_nread(ms_conn_t
*c
)
1844 assert(c
->rbytes
>= c
->rvbytes
);
1845 assert(c
->protocol
== ascii_udp_prot
|| c
->protocol
== ascii_prot
);
1849 c
->rcurr
[c
->rvbytes
- 1] == '\n' && c
->rcurr
[c
->rvbytes
- 2] == '\r');
1853 ms_mlget_task_item_t
*mlget_item
= NULL
;
1854 if (((ms_setting
.mult_key_num
> 1)
1855 && (c
->mlget_task
.mlget_num
>= ms_setting
.mult_key_num
))
1856 || ((c
->remain_exec_num
== 0) && (c
->mlget_task
.mlget_num
> 0)))
1858 c
->mlget_task
.value_index
++;
1859 mlget_item
= &c
->mlget_task
.mlget_item
[c
->mlget_task
.value_index
];
1861 if (mlget_item
->item
->key_prefix
== c
->currcmd
.key_prefix
)
1863 c
->curr_task
.item
= mlget_item
->item
;
1864 c
->curr_task
.verify
= mlget_item
->verify
;
1865 c
->curr_task
.finish_verify
= mlget_item
->finish_verify
;
1866 mlget_item
->get_miss
= false;
1870 /* Try to find the task item in multi-get task array */
1871 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
1873 mlget_item
= &c
->mlget_task
.mlget_item
[i
];
1874 if (mlget_item
->item
->key_prefix
== c
->currcmd
.key_prefix
)
1876 c
->curr_task
.item
= mlget_item
->item
;
1877 c
->curr_task
.verify
= mlget_item
->verify
;
1878 c
->curr_task
.finish_verify
= mlget_item
->finish_verify
;
1879 mlget_item
->get_miss
= false;
1887 ms_verify_value(c
, mlget_item
, c
->rcurr
, c
->rvbytes
- 2);
1889 c
->curr_task
.get_miss
= false;
1890 c
->rbytes
-= c
->rvbytes
;
1891 c
->rcurr
= c
->rcurr
+ c
->rvbytes
;
1892 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1895 } /* ms_ascii_complete_nread */
1899 * For binary protocol, after store the data into the local
1900 * buffer, run this function to handle the data.
1902 * @param c, pointer of the concurrency
1904 static void ms_bin_complete_nread(ms_conn_t
*c
)
1907 assert(c
->rbytes
>= c
->rvbytes
);
1908 assert(c
->protocol
== binary_prot
);
1910 int extlen
= c
->binary_header
.response
.extlen
;
1911 int keylen
= c
->binary_header
.response
.keylen
;
1912 uint8_t opcode
= c
->binary_header
.response
.opcode
;
1914 /* not get command or not include value, just return */
1915 if (((opcode
!= PROTOCOL_BINARY_CMD_GET
)
1916 && (opcode
!= PROTOCOL_BINARY_CMD_GETQ
))
1917 || (c
->rvbytes
<= extlen
+ keylen
))
1920 if (c
->binary_header
.response
.opcode
== PROTOCOL_BINARY_CMD_GET
)
1922 c
->currcmd
.retstat
= MCD_END
;
1923 c
->curr_task
.get_miss
= true;
1928 ms_reset_conn(c
, false);
1933 ms_mlget_task_item_t
*mlget_item
= NULL
;
1934 if (((ms_setting
.mult_key_num
> 1)
1935 && (c
->mlget_task
.mlget_num
>= ms_setting
.mult_key_num
))
1936 || ((c
->remain_exec_num
== 0) && (c
->mlget_task
.mlget_num
> 0)))
1938 c
->mlget_task
.value_index
++;
1939 mlget_item
= &c
->mlget_task
.mlget_item
[c
->mlget_task
.value_index
];
1941 c
->curr_task
.item
= mlget_item
->item
;
1942 c
->curr_task
.verify
= mlget_item
->verify
;
1943 c
->curr_task
.finish_verify
= mlget_item
->finish_verify
;
1944 mlget_item
->get_miss
= false;
1949 c
->rcurr
+ extlen
+ keylen
,
1950 c
->rvbytes
- extlen
- keylen
);
1952 c
->currcmd
.retstat
= MCD_END
;
1953 c
->curr_task
.get_miss
= false;
1954 c
->rbytes
-= c
->rvbytes
;
1955 c
->rcurr
= c
->rcurr
+ c
->rvbytes
;
1956 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1960 if (ms_setting
.mult_key_num
> 1)
1962 /* multi-get have check all the item */
1963 if (c
->mlget_task
.value_index
== c
->mlget_task
.mlget_num
- 1)
1965 ms_reset_conn(c
, false);
1971 ms_reset_conn(c
, false);
1973 } /* ms_bin_complete_nread */
1977 * we get here after reading the value of get commands.
1979 * @param c, pointer of the concurrency
1981 static void ms_complete_nread(ms_conn_t
*c
)
1984 assert(c
->rbytes
>= c
->rvbytes
);
1985 assert(c
->protocol
== ascii_udp_prot
1986 || c
->protocol
== ascii_prot
1987 || c
->protocol
== binary_prot
);
1989 if (c
->protocol
== binary_prot
)
1991 ms_bin_complete_nread(c
);
1995 ms_ascii_complete_nread(c
);
1997 } /* ms_complete_nread */
2001 * Adds a message header to a connection.
2003 * @param c, pointer of the concurrency
2005 * @return int, if success, return 0, else return -1
2007 static int ms_add_msghdr(ms_conn_t
*c
)
2013 if (c
->msgsize
== c
->msgused
)
2016 realloc(c
->msglist
, (uint64_t)c
->msgsize
* 2 * sizeof(struct msghdr
));
2024 msg
= c
->msglist
+ c
->msgused
;
2027 * this wipes msg_iovlen, msg_control, msg_controllen, and
2028 * msg_flags, the last 3 of which aren't defined on solaris:
2030 memset(msg
, 0, sizeof(struct msghdr
));
2032 msg
->msg_iov
= &c
->iov
[c
->iovused
];
2034 if (c
->udp
&& (c
->srv_recv_addr_size
> 0))
2036 msg
->msg_name
= &c
->srv_recv_addr
;
2037 msg
->msg_namelen
= c
->srv_recv_addr_size
;
2045 /* Leave room for the UDP header, which we'll fill in later. */
2046 return ms_add_iov(c
, NULL
, UDP_HEADER_SIZE
);
2050 } /* ms_add_msghdr */
2054 * Ensures that there is room for another structure iovec in a connection's
2057 * @param c, pointer of the concurrency
2059 * @return int, if success, return 0, else return -1
2061 static int ms_ensure_iov_space(ms_conn_t
*c
)
2065 if (c
->iovused
>= c
->iovsize
)
2068 struct iovec
*new_iov
= (struct iovec
*)realloc(c
->iov
,
2069 ((uint64_t)c
->iovsize
2071 * sizeof(struct iovec
));
2078 /* Point all the msghdr structures at the new list. */
2079 for (i
= 0, iovnum
= 0; i
< c
->msgused
; i
++)
2081 c
->msglist
[i
].msg_iov
= &c
->iov
[iovnum
];
2082 iovnum
+= (int)c
->msglist
[i
].msg_iovlen
;
2087 } /* ms_ensure_iov_space */
2091 * Adds data to the list of pending data that will be written out to a
2094 * @param c, pointer of the concurrency
2095 * @param buf, the buffer includes data to send
2096 * @param len, the data length in the buffer
2098 * @return int, if success, return 0, else return -1
2100 static int ms_add_iov(ms_conn_t
*c
, const void *buf
, int len
)
2110 m
= &c
->msglist
[c
->msgused
- 1];
2113 * Limit UDP packets, to UDP_MAX_PAYLOAD_SIZE bytes.
2115 limit_to_mtu
= c
->udp
;
2117 /* We may need to start a new msghdr if this one is full. */
2118 if ((m
->msg_iovlen
== IOV_MAX
)
2119 || (limit_to_mtu
&& (c
->msgbytes
>= UDP_MAX_SEND_PAYLOAD_SIZE
)))
2122 m
= &c
->msglist
[c
->msgused
- 1];
2125 if (ms_ensure_iov_space(c
) != 0)
2128 /* If the fragment is too big to fit in the datagram, split it up */
2129 if (limit_to_mtu
&& (len
+ c
->msgbytes
> UDP_MAX_SEND_PAYLOAD_SIZE
))
2131 leftover
= len
+ c
->msgbytes
- UDP_MAX_SEND_PAYLOAD_SIZE
;
2139 m
= &c
->msglist
[c
->msgused
- 1];
2140 m
->msg_iov
[m
->msg_iovlen
].iov_base
= (void *)buf
;
2141 m
->msg_iov
[m
->msg_iovlen
].iov_len
= (size_t)len
;
2147 buf
= ((char *)buf
) + len
;
2150 while (leftover
> 0);
2157 * Constructs a set of UDP headers and attaches them to the outgoing messages.
2159 * @param c, pointer of the concurrency
2161 * @return int, if success, return 0, else return -1
2163 static int ms_build_udp_headers(ms_conn_t
*c
)
2170 c
->request_id
= ms_get_udp_request_id();
2172 if (c
->msgused
> c
->hdrsize
)
2176 new_hdrbuf
= realloc(c
->hdrbuf
,
2177 (size_t)c
->msgused
* 2 * UDP_HEADER_SIZE
);
2179 new_hdrbuf
= malloc((size_t)c
->msgused
* 2 * UDP_HEADER_SIZE
);
2183 c
->hdrbuf
= (unsigned char *)new_hdrbuf
;
2184 c
->hdrsize
= c
->msgused
* 2;
2187 /* If this is a multi-packet request, drop it. */
2188 if (c
->udp
&& (c
->msgused
> 1))
2190 fprintf(stderr
, "multi-packet request for UDP not supported.\n");
2195 for (i
= 0; i
< c
->msgused
; i
++)
2197 c
->msglist
[i
].msg_iov
[0].iov_base
= (void *)hdr
;
2198 c
->msglist
[i
].msg_iov
[0].iov_len
= UDP_HEADER_SIZE
;
2199 *hdr
++= (unsigned char)(c
->request_id
/ 256);
2200 *hdr
++= (unsigned char)(c
->request_id
% 256);
2201 *hdr
++= (unsigned char)(i
/ 256);
2202 *hdr
++= (unsigned char)(i
% 256);
2203 *hdr
++= (unsigned char)(c
->msgused
/ 256);
2204 *hdr
++= (unsigned char)(c
->msgused
% 256);
2205 *hdr
++= (unsigned char)1; /* support facebook memcached */
2206 *hdr
++= (unsigned char)0;
2208 ((unsigned char *)c
->msglist
[i
].msg_iov
[0].iov_base
2209 + UDP_HEADER_SIZE
));
2213 } /* ms_build_udp_headers */
2217 * Transmit the next chunk of data from our list of msgbuf structures.
2219 * @param c, pointer of the concurrency
2221 * @return TRANSMIT_COMPLETE All done writing.
2222 * TRANSMIT_INCOMPLETE More data remaining to write.
2223 * TRANSMIT_SOFT_ERROR Can't write any more right now.
2224 * TRANSMIT_HARD_ERROR Can't write (c->state is set to conn_closing)
2226 static int ms_transmit(ms_conn_t
*c
)
2230 if ((c
->msgcurr
< c
->msgused
)
2231 && (c
->msglist
[c
->msgcurr
].msg_iovlen
== 0))
2233 /* Finished writing the current msg; advance to the next. */
2237 if (c
->msgcurr
< c
->msgused
)
2240 struct msghdr
*m
= &c
->msglist
[c
->msgcurr
];
2242 res
= sendmsg(c
->sfd
, m
, 0);
2245 atomic_add_64(&ms_stats
.bytes_written
, res
);
2247 /* We've written some of the data. Remove the completed
2248 * iovec entries from the list of pending writes. */
2249 while (m
->msg_iovlen
> 0 && res
>= (ssize_t
)m
->msg_iov
->iov_len
)
2251 res
-= (ssize_t
)m
->msg_iov
->iov_len
;
2256 /* Might have written just part of the last iovec entry;
2257 * adjust it so the next write will do the rest. */
2260 m
->msg_iov
->iov_base
= (void *)((unsigned char *)m
->msg_iov
->iov_base
+ res
);
2261 m
->msg_iov
->iov_len
-= (uint64_t)res
;
2263 return TRANSMIT_INCOMPLETE
;
2265 if ((res
== -1) && ((errno
== EAGAIN
) || (errno
== EWOULDBLOCK
)))
2267 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2269 fprintf(stderr
, "Couldn't update event.\n");
2270 ms_conn_set_state(c
, conn_closing
);
2271 return TRANSMIT_HARD_ERROR
;
2273 return TRANSMIT_SOFT_ERROR
;
2276 /* if res==0 or res==-1 and error is not EAGAIN or EWOULDBLOCK,
2277 * we have a real error, on which we close the connection */
2278 fprintf(stderr
, "Failed to write, and not due to blocking.\n");
2280 ms_conn_set_state(c
, conn_closing
);
2281 return TRANSMIT_HARD_ERROR
;
2285 return TRANSMIT_COMPLETE
;
2291 * Shrinks a connection's buffers if they're too big. This prevents
2292 * periodic large "mget" response from server chewing lots of client
2295 * This should only be called in between requests since it can wipe output
2298 * @param c, pointer of the concurrency
2300 static void ms_conn_shrink(ms_conn_t
*c
)
2307 if ((c
->rsize
> READ_BUFFER_HIGHWAT
) && (c
->rbytes
< DATA_BUFFER_SIZE
))
2311 if (c
->rcurr
!= c
->rbuf
)
2312 memmove(c
->rbuf
, c
->rcurr
, (size_t)c
->rbytes
);
2314 newbuf
= (char *)realloc((void *)c
->rbuf
, DATA_BUFFER_SIZE
);
2319 c
->rsize
= DATA_BUFFER_SIZE
;
2324 if (c
->udp
&& (c
->rudpsize
> UDP_DATA_BUFFER_HIGHWAT
)
2325 && (c
->rudpbytes
+ UDP_MAX_PAYLOAD_SIZE
< UDP_DATA_BUFFER_SIZE
))
2327 char *new_rbuf
= (char *)realloc(c
->rudpbuf
, (size_t)c
->rudpsize
* 2);
2330 c
->rudpbuf
= new_rbuf
;
2331 c
->rudpsize
= UDP_DATA_BUFFER_SIZE
;
2333 /* TODO check error condition? */
2336 if (c
->msgsize
> MSG_LIST_HIGHWAT
)
2338 struct msghdr
*newbuf
= (struct msghdr
*)realloc(
2341 * sizeof(c
->msglist
[0]));
2345 c
->msgsize
= MSG_LIST_INITIAL
;
2347 /* TODO check error condition? */
2350 if (c
->iovsize
> IOV_LIST_HIGHWAT
)
2352 struct iovec
*newbuf
= (struct iovec
*)realloc((void *)c
->iov
,
2354 * sizeof(c
->iov
[0]));
2358 c
->iovsize
= IOV_LIST_INITIAL
;
2360 /* TODO check return value */
2362 } /* ms_conn_shrink */
2366 * Sets a connection's current state in the state machine. Any special
2367 * processing that needs to happen on certain state transitions can
2370 * @param c, pointer of the concurrency
2371 * @param state, connection state
2373 static void ms_conn_set_state(ms_conn_t
*c
, int state
)
2377 if (state
!= c
->state
)
2379 if (state
== conn_read
)
2385 } /* ms_conn_set_state */
2389 * update the event if socks change state. for example: when
2390 * change the listen scoket read event to sock write event, or
2391 * change socket handler, we could call this function.
2393 * @param c, pointer of the concurrency
2394 * @param new_flags, new event flags
2396 * @return bool, if success, return true, else return false
2398 static bool ms_update_event(ms_conn_t
*c
, const int new_flags
)
2400 /* default event timeout 10 seconds */
2403 .tv_sec
= EVENT_TIMEOUT
, .tv_usec
= 0
2408 struct event_base
*base
= c
->event
.ev_base
;
2409 if ((c
->ev_flags
== new_flags
) && (ms_setting
.rep_write_srv
== 0)
2410 && (! ms_setting
.facebook_test
|| (c
->total_sfds
== 1)))
2415 if (event_del(&c
->event
) == -1)
2417 /* try to delete the event again */
2418 if (event_del(&c
->event
) == -1)
2424 event_set(&c
->event
,
2429 event_base_set(base
, &c
->event
);
2430 c
->ev_flags
= (short)new_flags
;
2432 if (c
->total_sfds
== 1)
2434 if (event_add(&c
->event
, NULL
) == -1)
2441 if (event_add(&c
->event
, &t
) == -1)
2448 } /* ms_update_event */
2452 * If user want to get the expected throughput, we could limit
2453 * the performance of memslap. we could give up some work and
2454 * just wait a short time. The function is used to check this
2457 * @param c, pointer of the concurrency
2459 * @return bool, if success, return true, else return false
2461 static bool ms_need_yield(ms_conn_t
*c
)
2463 ms_thread_t
*ms_thread
= pthread_getspecific(ms_thread_key
);
2465 int64_t time_diff
= 0;
2466 struct timeval curr_time
;
2467 ms_task_t
*task
= &c
->curr_task
;
2469 if (ms_setting
.expected_tps
> 0)
2471 gettimeofday(&curr_time
, NULL
);
2472 time_diff
= ms_time_diff(&ms_thread
->startup_time
, &curr_time
);
2474 (int64_t)((task
->get_opt
2475 + task
->set_opt
) / ((uint64_t)time_diff
/ 1000000));
2477 /* current throughput is greater than expected throughput */
2478 if (tps
> ms_thread
->thread_ctx
->tps_perconn
)
2485 } /* ms_need_yield */
2489 * used to update the start time of each operation
2491 * @param c, pointer of the concurrency
2493 static void ms_update_start_time(ms_conn_t
*c
)
2495 ms_task_item_t
*item
= c
->curr_task
.item
;
2497 if ((ms_setting
.stat_freq
> 0) || c
->udp
2498 || ((c
->currcmd
.cmd
== CMD_SET
) && (item
->exp_time
> 0)))
2500 gettimeofday(&c
->start_time
, NULL
);
2501 if ((c
->currcmd
.cmd
== CMD_SET
) && (item
->exp_time
> 0))
2503 /* record the current time */
2504 item
->client_time
= c
->start_time
.tv_sec
;
2507 } /* ms_update_start_time */
2511 * run the state machine
2513 * @param c, pointer of the concurrency
2515 static void ms_drive_machine(ms_conn_t
*c
)
2528 if (c
->rbytes
>= c
->rvbytes
)
2530 ms_complete_nread(c
);
2536 if (ms_try_read_line(c
) != 0)
2542 if (ms_try_read_network(c
) != 0)
2547 /* doesn't read all the response data, wait event wake up */
2548 if (! c
->currcmd
.isfinish
)
2550 if (! ms_update_event(c
, EV_READ
| EV_PERSIST
))
2552 fprintf(stderr
, "Couldn't update event.\n");
2553 ms_conn_set_state(c
, conn_closing
);
2560 /* we have no command line and no data to read from network, next write */
2561 ms_conn_set_state(c
, conn_write
);
2562 memcpy(&c
->precmd
, &c
->currcmd
, sizeof(ms_cmdstat_t
)); /* replicate command state */
2567 if (! c
->ctnwrite
&& ms_need_yield(c
))
2571 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2573 fprintf(stderr
, "Couldn't update event.\n");
2574 ms_conn_set_state(c
, conn_closing
);
2581 if (! c
->ctnwrite
&& (ms_exec_task(c
) != 0))
2583 ms_conn_set_state(c
, conn_closing
);
2587 /* record the start time before starting to send data if necessary */
2588 if (! c
->ctnwrite
|| (c
->change_sfd
&& c
->ctnwrite
))
2592 c
->change_sfd
= false;
2594 ms_update_start_time(c
);
2597 /* change sfd if necessary */
2605 /* execute task until nothing need be written to network */
2606 if (! c
->ctnwrite
&& (c
->msgcurr
== c
->msgused
))
2608 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2610 fprintf(stderr
, "Couldn't update event.\n");
2611 ms_conn_set_state(c
, conn_closing
);
2618 switch (ms_transmit(c
))
2620 case TRANSMIT_COMPLETE
:
2621 /* we have no data to write to network, next wait repose */
2622 if (! ms_update_event(c
, EV_READ
| EV_PERSIST
))
2624 fprintf(stderr
, "Couldn't update event.\n");
2625 ms_conn_set_state(c
, conn_closing
);
2629 ms_conn_set_state(c
, conn_read
);
2634 case TRANSMIT_INCOMPLETE
:
2636 break; /* Continue in state machine. */
2638 case TRANSMIT_HARD_ERROR
:
2642 case TRANSMIT_SOFT_ERROR
:
2654 /* recovery mode, need reconnect if connection close */
2655 if (ms_setting
.reconnect
&& (! ms_global
.time_out
2656 || ((ms_setting
.run_time
== 0)
2657 && (c
->remain_exec_num
> 0))))
2659 if (ms_reconn(c
) != 0)
2666 ms_reset_conn(c
, false);
2668 if (c
->total_sfds
== 1)
2670 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2672 fprintf(stderr
, "Couldn't update event.\n");
2673 ms_conn_set_state(c
, conn_closing
);
2691 } /* ms_drive_machine */
2695 * the event handler of each thread
2697 * @param fd, the file descriptor of socket
2698 * @param which, event flag
2699 * @param arg, argument
2701 void ms_event_handler(const int fd
, const short which
, void *arg
)
2703 ms_conn_t
*c
= (ms_conn_t
*)arg
;
2713 "Catastrophic: event fd: %d doesn't match conn fd: %d\n",
2719 assert(fd
== c
->sfd
);
2721 /* event timeout, close the current connection */
2722 if (c
->which
== EV_TIMEOUT
)
2724 ms_conn_set_state(c
, conn_closing
);
2727 ms_drive_machine(c
);
2729 /* wait for next event */
2730 } /* ms_event_handler */
2734 * get the next socket descriptor index to run for replication
2736 * @param c, pointer of the concurrency
2737 * @param cmd, command(get or set )
2739 * @return int, if success, return the index, else return 0
2741 static int ms_get_rep_sock_index(ms_conn_t
*c
, int cmd
)
2746 if (c
->total_sfds
== 1)
2751 if (ms_setting
.rep_write_srv
== 0)
2760 for (i
= 0; i
< ms_setting
.rep_write_srv
; i
++)
2762 if (c
->tcpsfd
[i
] > 0)
2768 if (i
== ms_setting
.rep_write_srv
)
2770 /* random get one replication server to read */
2771 sock_index
= (int)(random() % c
->total_sfds
);
2775 /* random get one replication writing server to write */
2776 sock_index
= (int)(random() % ms_setting
.rep_write_srv
);
2779 else if (cmd
== CMD_GET
)
2781 /* random get one replication server to read */
2782 sock_index
= (int)(random() % c
->total_sfds
);
2785 while (c
->tcpsfd
[sock_index
] == 0);
2788 } /* ms_get_rep_sock_index */
2792 * get the next socket descriptor index to run
2794 * @param c, pointer of the concurrency
2796 * @return int, return the index
2798 static int ms_get_next_sock_index(ms_conn_t
*c
)
2804 sock_index
= (++c
->cur_idx
== c
->total_sfds
) ? 0 : c
->cur_idx
;
2806 while (c
->tcpsfd
[sock_index
] == 0);
2809 } /* ms_get_next_sock_index */
2813 * update socket event of the connections
2815 * @param c, pointer of the concurrency
2817 * @return int, if success, return 0, else return -1
2819 static int ms_update_conn_sock_event(ms_conn_t
*c
)
2823 switch (c
->currcmd
.cmd
)
2826 if (ms_setting
.facebook_test
&& c
->udp
)
2828 c
->sfd
= c
->tcpsfd
[0];
2830 c
->change_sfd
= true;
2835 if (ms_setting
.facebook_test
&& ! c
->udp
)
2839 c
->change_sfd
= true;
2847 if (! c
->udp
&& (c
->total_sfds
> 1))
2849 if (c
->cur_idx
!= c
->total_sfds
)
2851 if (ms_setting
.rep_write_srv
== 0)
2853 c
->cur_idx
= ms_get_next_sock_index(c
);
2857 c
->cur_idx
= ms_get_rep_sock_index(c
, c
->currcmd
.cmd
);
2862 /* must select the first sock of the connection at the beginning */
2866 c
->sfd
= c
->tcpsfd
[c
->cur_idx
];
2867 assert(c
->sfd
!= 0);
2868 c
->change_sfd
= true;
2873 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2875 fprintf(stderr
, "Couldn't update event.\n");
2876 ms_conn_set_state(c
, conn_closing
);
2882 } /* ms_update_conn_sock_event */
2886 * for ASCII protocol, this function build the set command
2887 * string and send the command.
2889 * @param c, pointer of the concurrency
2890 * @param item, pointer of task item which includes the object
2893 * @return int, if success, return 0, else return -1
2895 static int ms_build_ascii_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
)
2899 char *buffer
= c
->wbuf
;
2901 write_len
= sprintf(buffer
,
2907 if (write_len
> c
->wsize
)
2909 /* ought to be always enough. just fail for simplicity */
2910 fprintf(stderr
, "output command line too long.\n");
2914 if (item
->value_offset
== INVALID_OFFSET
)
2916 value_offset
= item
->key_suffix_offset
;
2920 value_offset
= item
->value_offset
;
2923 if ((ms_add_iov(c
, "set ", 4) != 0)
2924 || (ms_add_iov(c
, (char *)&item
->key_prefix
,
2925 (int)KEY_PREFIX_SIZE
) != 0)
2926 || (ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
2927 item
->key_size
- (int)KEY_PREFIX_SIZE
) != 0)
2928 || (ms_add_iov(c
, buffer
, write_len
) != 0)
2929 || (ms_add_iov(c
, &ms_setting
.char_block
[value_offset
],
2930 item
->value_size
) != 0)
2931 || (ms_add_iov(c
, "\r\n", 2) != 0)
2932 || (c
->udp
&& (ms_build_udp_headers(c
) != 0)))
2938 } /* ms_build_ascii_write_buf_set */
2942 * used to send set command to server
2944 * @param c, pointer of the concurrency
2945 * @param item, pointer of task item which includes the object
2948 * @return int, if success, return 0, else return -1
2950 int ms_mcd_set(ms_conn_t
*c
, ms_task_item_t
*item
)
2954 c
->currcmd
.cmd
= CMD_SET
;
2955 c
->currcmd
.isfinish
= false;
2956 c
->currcmd
.retstat
= MCD_FAILURE
;
2958 if (ms_update_conn_sock_event(c
) != 0)
2966 if (ms_add_msghdr(c
) != 0)
2968 fprintf(stderr
, "Out of memory preparing request.");
2972 /* binary protocol */
2973 if (c
->protocol
== binary_prot
)
2975 if (ms_build_bin_write_buf_set(c
, item
) != 0)
2982 if (ms_build_ascii_write_buf_set(c
, item
) != 0)
2988 atomic_add_64(&ms_stats
.obj_bytes
,
2989 item
->key_size
+ item
->value_size
);
2990 atomic_add_64(&ms_stats
.cmd_set
, 1);
2997 * for ASCII protocol, this function build the get command
2998 * string and send the command.
3000 * @param c, pointer of the concurrency
3001 * @param item, pointer of task item which includes the object
3004 * @return int, if success, return 0, else return -1
3006 static int ms_build_ascii_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
)
3008 if ((ms_add_iov(c
, "get ", 4) != 0)
3009 || (ms_add_iov(c
, (char *)&item
->key_prefix
,
3010 (int)KEY_PREFIX_SIZE
) != 0)
3011 || (ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
3012 item
->key_size
- (int)KEY_PREFIX_SIZE
) != 0)
3013 || (ms_add_iov(c
, "\r\n", 2) != 0)
3014 || (c
->udp
&& (ms_build_udp_headers(c
) != 0)))
3020 } /* ms_build_ascii_write_buf_get */
3024 * used to send the get command to server
3026 * @param c, pointer of the concurrency
3027 * @param item, pointer of task item which includes the object
3029 * @param verify, whether do verification
3031 * @return int, if success, return 0, else return -1
3033 int ms_mcd_get(ms_conn_t
*c
, ms_task_item_t
*item
, bool verify
)
3035 /* verify not supported yet */
3036 UNUSED_ARGUMENT(verify
);
3040 c
->currcmd
.cmd
= CMD_GET
;
3041 c
->currcmd
.isfinish
= false;
3042 c
->currcmd
.retstat
= MCD_FAILURE
;
3044 if (ms_update_conn_sock_event(c
) != 0)
3052 if (ms_add_msghdr(c
) != 0)
3054 fprintf(stderr
, "Out of memory preparing request.");
3058 /* binary protocol */
3059 if (c
->protocol
== binary_prot
)
3061 if (ms_build_bin_write_buf_get(c
, item
) != 0)
3068 if (ms_build_ascii_write_buf_get(c
, item
) != 0)
3074 atomic_add_64(&ms_stats
.cmd_get
, 1);
3081 * for ASCII protocol, this function build the multi-get command
3082 * string and send the command.
3084 * @param c, pointer of the concurrency
3086 * @return int, if success, return 0, else return -1
3088 static int ms_build_ascii_write_buf_mlget(ms_conn_t
*c
)
3090 ms_task_item_t
*item
;
3092 if (ms_add_iov(c
, "get", 3) != 0)
3097 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
3099 item
= c
->mlget_task
.mlget_item
[i
].item
;
3100 assert(item
!= NULL
);
3101 if ((ms_add_iov(c
, " ", 1) != 0)
3102 || (ms_add_iov(c
, (char *)&item
->key_prefix
,
3103 (int)KEY_PREFIX_SIZE
) != 0)
3104 || (ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
3105 item
->key_size
- (int)KEY_PREFIX_SIZE
) != 0))
3111 if ((ms_add_iov(c
, "\r\n", 2) != 0)
3112 || (c
->udp
&& (ms_build_udp_headers(c
) != 0)))
3118 } /* ms_build_ascii_write_buf_mlget */
3122 * used to send the multi-get command to server
3124 * @param c, pointer of the concurrency
3126 * @return int, if success, return 0, else return -1
3128 int ms_mcd_mlget(ms_conn_t
*c
)
3130 ms_task_item_t
*item
;
3133 assert(c
->mlget_task
.mlget_num
>= 1);
3135 c
->currcmd
.cmd
= CMD_GET
;
3136 c
->currcmd
.isfinish
= false;
3137 c
->currcmd
.retstat
= MCD_FAILURE
;
3139 if (ms_update_conn_sock_event(c
) != 0)
3147 if (ms_add_msghdr(c
) != 0)
3149 fprintf(stderr
, "Out of memory preparing request.");
3153 /* binary protocol */
3154 if (c
->protocol
== binary_prot
)
3156 if (ms_build_bin_write_buf_mlget(c
) != 0)
3163 if (ms_build_ascii_write_buf_mlget(c
) != 0)
3169 /* decrease operation time of each item */
3170 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
3172 item
= c
->mlget_task
.mlget_item
[i
].item
;
3173 atomic_add_64(&ms_stats
.cmd_get
, 1);
3177 } /* ms_mcd_mlget */
3181 * binary protocol support
3185 * for binary protocol, parse the response of server
3187 * @param c, pointer of the concurrency
3189 * @return int, if success, return 0, else return -1
3191 static int ms_bin_process_response(ms_conn_t
*c
)
3193 const char *errstr
= NULL
;
3197 uint32_t bodylen
= c
->binary_header
.response
.bodylen
;
3198 uint8_t opcode
= c
->binary_header
.response
.opcode
;
3199 uint16_t status
= c
->binary_header
.response
.status
;
3203 c
->rvbytes
= (int32_t)bodylen
;
3211 case PROTOCOL_BINARY_RESPONSE_SUCCESS
:
3212 if (opcode
== PROTOCOL_BINARY_CMD_SET
)
3214 c
->currcmd
.retstat
= MCD_STORED
;
3216 else if (opcode
== PROTOCOL_BINARY_CMD_DELETE
)
3218 c
->currcmd
.retstat
= MCD_DELETED
;
3220 else if (opcode
== PROTOCOL_BINARY_CMD_GET
)
3222 c
->currcmd
.retstat
= MCD_END
;
3226 case PROTOCOL_BINARY_RESPONSE_ENOMEM
:
3227 errstr
= "Out of memory";
3228 c
->currcmd
.retstat
= MCD_SERVER_ERROR
;
3231 case PROTOCOL_BINARY_RESPONSE_UNKNOWN_COMMAND
:
3232 errstr
= "Unknown command";
3233 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
3236 case PROTOCOL_BINARY_RESPONSE_KEY_ENOENT
:
3237 errstr
= "Not found";
3238 c
->currcmd
.retstat
= MCD_NOTFOUND
;
3241 case PROTOCOL_BINARY_RESPONSE_EINVAL
:
3242 errstr
= "Invalid arguments";
3243 c
->currcmd
.retstat
= MCD_PROTOCOL_ERROR
;
3246 case PROTOCOL_BINARY_RESPONSE_KEY_EEXISTS
:
3247 errstr
= "Data exists for key.";
3250 case PROTOCOL_BINARY_RESPONSE_E2BIG
:
3251 errstr
= "Too large.";
3252 c
->currcmd
.retstat
= MCD_SERVER_ERROR
;
3255 case PROTOCOL_BINARY_RESPONSE_NOT_STORED
:
3256 errstr
= "Not stored.";
3257 c
->currcmd
.retstat
= MCD_NOTSTORED
;
3261 errstr
= "Unknown error";
3262 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
3268 fprintf(stderr
, "%s\n", errstr
);
3273 } /* ms_bin_process_response */
3276 /* build binary header and add the header to the buffer to send */
3279 * build binary header and add the header to the buffer to send
3281 * @param c, pointer of the concurrency
3282 * @param opcode, operation code
3283 * @param hdr_len, length of header
3284 * @param key_len, length of key
3285 * @param body_len. length of body
3287 static void ms_add_bin_header(ms_conn_t
*c
,
3293 protocol_binary_request_header
*header
;
3297 header
= (protocol_binary_request_header
*)c
->wcurr
;
3299 header
->request
.magic
= (uint8_t)PROTOCOL_BINARY_REQ
;
3300 header
->request
.opcode
= (uint8_t)opcode
;
3301 header
->request
.keylen
= htonl(key_len
);
3303 header
->request
.extlen
= (uint8_t)hdr_len
;
3304 header
->request
.datatype
= (uint8_t)PROTOCOL_BINARY_RAW_BYTES
;
3305 header
->request
.reserved
= 0;
3307 header
->request
.bodylen
= htonl(body_len
);
3308 header
->request
.opaque
= 0;
3309 header
->request
.cas
= 0;
3311 ms_add_iov(c
, c
->wcurr
, sizeof(header
->request
));
3312 } /* ms_add_bin_header */
3316 * add the key to the socket write buffer array
3318 * @param c, pointer of the concurrency
3319 * @param item, pointer of task item which includes the object
3322 static void ms_add_key_to_iov(ms_conn_t
*c
, ms_task_item_t
*item
)
3324 ms_add_iov(c
, (char *)&item
->key_prefix
, (int)KEY_PREFIX_SIZE
);
3325 ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
3326 item
->key_size
- (int)KEY_PREFIX_SIZE
);
3331 * for binary protocol, this function build the set command
3332 * and add the command to send buffer array.
3334 * @param c, pointer of the concurrency
3335 * @param item, pointer of task item which includes the object
3338 * @return int, if success, return 0, else return -1
3340 static int ms_build_bin_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
)
3342 assert(c
->wbuf
== c
->wcurr
);
3345 protocol_binary_request_set
*rep
= (protocol_binary_request_set
*)c
->wcurr
;
3346 uint16_t keylen
= (uint16_t)item
->key_size
;
3347 uint32_t bodylen
= (uint32_t)sizeof(rep
->message
.body
)
3348 + (uint32_t)keylen
+ (uint32_t)item
->value_size
;
3350 ms_add_bin_header(c
,
3351 PROTOCOL_BINARY_CMD_SET
,
3352 sizeof(rep
->message
.body
),
3355 rep
->message
.body
.flags
= 0;
3356 rep
->message
.body
.expiration
= htonl((uint32_t)item
->exp_time
);
3357 ms_add_iov(c
, &rep
->message
.body
, sizeof(rep
->message
.body
));
3358 ms_add_key_to_iov(c
, item
);
3360 if (item
->value_offset
== INVALID_OFFSET
)
3362 value_offset
= item
->key_suffix_offset
;
3366 value_offset
= item
->value_offset
;
3368 ms_add_iov(c
, &ms_setting
.char_block
[value_offset
], item
->value_size
);
3371 } /* ms_build_bin_write_buf_set */
3375 * for binary protocol, this function build the get command and
3376 * add the command to send buffer array.
3378 * @param c, pointer of the concurrency
3379 * @param item, pointer of task item which includes the object
3382 * @return int, if success, return 0, else return -1
3384 static int ms_build_bin_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
)
3386 assert(c
->wbuf
== c
->wcurr
);
3388 ms_add_bin_header(c
, PROTOCOL_BINARY_CMD_GET
, 0, (uint16_t)item
->key_size
,
3389 (uint32_t)item
->key_size
);
3390 ms_add_key_to_iov(c
, item
);
3393 } /* ms_build_bin_write_buf_get */
3397 * for binary protocol, this function build the multi-get
3398 * command and add the command to send buffer array.
3400 * @param c, pointer of the concurrency
3401 * @param item, pointer of task item which includes the object
3404 * @return int, if success, return 0, else return -1
3406 static int ms_build_bin_write_buf_mlget(ms_conn_t
*c
)
3408 ms_task_item_t
*item
;
3410 assert(c
->wbuf
== c
->wcurr
);
3412 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
3414 item
= c
->mlget_task
.mlget_item
[i
].item
;
3415 assert(item
!= NULL
);
3417 ms_add_bin_header(c
,
3418 PROTOCOL_BINARY_CMD_GET
,
3420 (uint16_t)item
->key_size
,
3421 (uint32_t)item
->key_size
);
3422 ms_add_key_to_iov(c
, item
);
3423 c
->wcurr
+= sizeof(protocol_binary_request_get
);
3429 } /* ms_build_bin_write_buf_mlget */