3 * Author: Mingqiang Zhuang
5 * Created on February 10, 2009
7 * (c) Copyright 2009, Schooner Information Technology, Inc.
8 * http://www.schoonerinfotech.com/
19 #include <netinet/tcp.h>
20 #include <arpa/inet.h>
21 #include "ms_setting.h"
22 #include "ms_thread.h"
24 /* for network write */
25 #define TRANSMIT_COMPLETE 0
26 #define TRANSMIT_INCOMPLETE 1
27 #define TRANSMIT_SOFT_ERROR 2
28 #define TRANSMIT_HARD_ERROR 3
30 /* for generating key */
31 #define KEY_PREFIX_BASE 0x1010101010101010 /* not include ' ' '\r' '\n' '\0' */
32 #define KEY_PREFIX_MASK 0x1010101010101010
34 /* For parse the value length return by server */
36 #define VALUELEN_TOKEN 3
38 /* global increasing counter, to ensure the key prefix unique */
39 static uint64_t key_prefix_seq
= KEY_PREFIX_BASE
;
41 /* global increasing counter, generating request id for UDP */
42 static int udp_request_id
= 0;
44 extern __thread ms_thread_t ms_thread
;
46 /* generate upd request id */
47 static int ms_get_udp_request_id(void);
50 /* connect initialize */
51 static void ms_task_init(ms_conn_t
*c
);
52 static int ms_conn_udp_init(ms_conn_t
*c
, const bool is_udp
);
53 static int ms_conn_sock_init(ms_conn_t
*c
);
54 static int ms_conn_event_init(ms_conn_t
*c
);
55 static int ms_conn_init(ms_conn_t
*c
,
57 const int read_buffer_size
,
59 static void ms_warmup_num_init(ms_conn_t
*c
);
60 static int ms_item_win_init(ms_conn_t
*c
);
63 /* connection close */
64 void ms_conn_free(ms_conn_t
*c
);
65 static void ms_conn_close(ms_conn_t
*c
);
68 /* create network connection */
69 static int ms_new_socket(struct addrinfo
*ai
);
70 static void ms_maximize_sndbuf(const int sfd
);
71 static int ms_network_connect(ms_conn_t
*c
,
76 static int ms_reconn(ms_conn_t
*c
);
80 static int ms_tokenize_command(char *command
,
82 const int max_tokens
);
83 static int ms_ascii_process_line(ms_conn_t
*c
, char *command
);
84 static int ms_try_read_line(ms_conn_t
*c
);
85 static int ms_sort_udp_packet(ms_conn_t
*c
, char *buf
, int rbytes
);
86 static int ms_udp_read(ms_conn_t
*c
, char *buf
, int len
);
87 static int ms_try_read_network(ms_conn_t
*c
);
88 static void ms_verify_value(ms_conn_t
*c
,
89 ms_mlget_task_item_t
*mlget_item
,
92 static void ms_ascii_complete_nread(ms_conn_t
*c
);
93 static void ms_bin_complete_nread(ms_conn_t
*c
);
94 static void ms_complete_nread(ms_conn_t
*c
);
98 static int ms_add_msghdr(ms_conn_t
*c
);
99 static int ms_ensure_iov_space(ms_conn_t
*c
);
100 static int ms_add_iov(ms_conn_t
*c
, const void *buf
, int len
);
101 static int ms_build_udp_headers(ms_conn_t
*c
);
102 static int ms_transmit(ms_conn_t
*c
);
105 /* status adjustment */
106 static void ms_conn_shrink(ms_conn_t
*c
);
107 static void ms_conn_set_state(ms_conn_t
*c
, int state
);
108 static bool ms_update_event(ms_conn_t
*c
, const int new_flags
);
109 static int ms_get_rep_sock_index(ms_conn_t
*c
, int cmd
);
110 static int ms_get_next_sock_index(ms_conn_t
*c
);
111 static int ms_update_conn_sock_event(ms_conn_t
*c
);
112 static bool ms_need_yield(ms_conn_t
*c
);
113 static void ms_update_start_time(ms_conn_t
*c
);
117 static void ms_drive_machine(ms_conn_t
*c
);
118 void ms_event_handler(const int fd
, const short which
, void *arg
);
122 static int ms_build_ascii_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
);
123 static int ms_build_ascii_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
);
124 static int ms_build_ascii_write_buf_mlget(ms_conn_t
*c
);
127 /* binary protocol */
128 static int ms_bin_process_response(ms_conn_t
*c
);
129 static void ms_add_bin_header(ms_conn_t
*c
,
134 static void ms_add_key_to_iov(ms_conn_t
*c
, ms_task_item_t
*item
);
135 static int ms_build_bin_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
);
136 static int ms_build_bin_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
);
137 static int ms_build_bin_write_buf_mlget(ms_conn_t
*c
);
141 * each key has two parts, prefix and suffix. The suffix is a
142 * string random get form the character table. The prefix is a
143 * uint64_t variable. And the prefix must be unique. we use the
144 * prefix to identify a key. And the prefix can't include
145 * character ' ' '\r' '\n' '\0'.
149 uint64_t ms_get_key_prefix(void)
153 pthread_mutex_lock(&ms_global
.seq_mutex
);
154 key_prefix_seq
|= KEY_PREFIX_MASK
;
155 key_prefix
= key_prefix_seq
;
157 pthread_mutex_unlock(&ms_global
.seq_mutex
);
160 } /* ms_get_key_prefix */
164 * get an unique udp request id
166 * @return an unique UDP request id
168 static int ms_get_udp_request_id(void)
170 return __sync_fetch_and_add(&udp_request_id
, 1);
175 * initialize current task structure
177 * @param c, pointer of the concurrency
179 static void ms_task_init(ms_conn_t
*c
)
181 c
->curr_task
.cmd
= CMD_NULL
;
182 c
->curr_task
.item
= 0;
183 c
->curr_task
.verify
= false;
184 c
->curr_task
.finish_verify
= true;
185 c
->curr_task
.get_miss
= true;
187 c
->curr_task
.get_opt
= 0;
188 c
->curr_task
.set_opt
= 0;
189 c
->curr_task
.cycle_undo_get
= 0;
190 c
->curr_task
.cycle_undo_set
= 0;
191 c
->curr_task
.verified_get
= 0;
192 c
->curr_task
.overwrite_set
= 0;
197 * initialize udp for the connection structure
199 * @param c, pointer of the concurrency
200 * @param is_udp, whether it's udp
202 * @return int, if success, return 0, else return -1
204 static int ms_conn_udp_init(ms_conn_t
*c
, const bool is_udp
)
210 c
->rudpsize
= UDP_DATA_BUFFER_SIZE
;
221 if (c
->udp
|| (! c
->udp
&& ms_setting
.facebook_test
))
223 c
->rudpbuf
= (char *)malloc((size_t)c
->rudpsize
);
224 c
->udppkt
= (ms_udppkt_t
*)malloc(MAX_UDP_PACKET
* sizeof(ms_udppkt_t
));
226 if ((c
->rudpbuf
== NULL
) || (c
->udppkt
== NULL
))
228 if (c
->rudpbuf
!= NULL
)
230 if (c
->udppkt
!= NULL
)
232 fprintf(stderr
, "malloc()\n");
235 memset(c
->udppkt
, 0, MAX_UDP_PACKET
* sizeof(ms_udppkt_t
));
239 } /* ms_conn_udp_init */
243 * initialize the connection structure
245 * @param c, pointer of the concurrency
246 * @param init_state, (conn_read, conn_write, conn_closing)
247 * @param read_buffer_size
248 * @param is_udp, whether it's udp
250 * @return int, if success, return 0, else return -1
252 static int ms_conn_init(ms_conn_t
*c
,
253 const int init_state
,
254 const int read_buffer_size
,
263 c
->rsize
= read_buffer_size
;
264 c
->wsize
= WRITE_BUFFER_SIZE
;
265 c
->iovsize
= IOV_LIST_INITIAL
;
266 c
->msgsize
= MSG_LIST_INITIAL
;
268 /* for replication, each connection need connect all the server */
269 if (ms_setting
.rep_write_srv
> 0)
271 c
->total_sfds
= ms_setting
.srv_cnt
;
275 c
->total_sfds
= ms_setting
.sock_per_conn
;
279 c
->rbuf
= (char *)malloc((size_t)c
->rsize
);
280 c
->wbuf
= (char *)malloc((size_t)c
->wsize
);
281 c
->iov
= (struct iovec
*)malloc(sizeof(struct iovec
) * (size_t)c
->iovsize
);
282 c
->msglist
= (struct msghdr
*)malloc(
283 sizeof(struct msghdr
) * (size_t)c
->msgsize
);
284 if (ms_setting
.mult_key_num
> 1)
286 c
->mlget_task
.mlget_item
= (ms_mlget_task_item_t
*)
288 sizeof(ms_mlget_task_item_t
) * (size_t)ms_setting
.mult_key_num
);
290 c
->tcpsfd
= (int *)malloc((size_t)c
->total_sfds
* sizeof(int));
292 if ((c
->rbuf
== NULL
) || (c
->wbuf
== NULL
) || (c
->iov
== NULL
)
293 || (c
->msglist
== NULL
) || (c
->tcpsfd
== NULL
)
294 || ((ms_setting
.mult_key_num
> 1)
295 && (c
->mlget_task
.mlget_item
== NULL
)))
303 if (c
->msglist
!= NULL
)
305 if (c
->mlget_task
.mlget_item
!= NULL
)
306 free(c
->mlget_task
.mlget_item
);
307 if (c
->tcpsfd
!= NULL
)
309 fprintf(stderr
, "malloc()\n");
313 c
->state
= init_state
;
321 c
->cur_idx
= c
->total_sfds
; /* default index is a invalid value */
325 c
->change_sfd
= false;
327 c
->precmd
.cmd
= c
->currcmd
.cmd
= CMD_NULL
;
328 c
->precmd
.isfinish
= true; /* default the previous command finished */
329 c
->currcmd
.isfinish
= false;
330 c
->precmd
.retstat
= c
->currcmd
.retstat
= MCD_FAILURE
;
331 c
->precmd
.key_prefix
= c
->currcmd
.key_prefix
= 0;
333 c
->mlget_task
.mlget_num
= 0;
334 c
->mlget_task
.value_index
= -1; /* default invalid value */
336 if (ms_setting
.binary_prot
)
338 c
->protocol
= binary_prot
;
342 c
->protocol
= ascii_udp_prot
;
346 c
->protocol
= ascii_prot
;
350 if (ms_conn_udp_init(c
, is_udp
) != 0)
355 /* initialize task */
358 if (! (ms_setting
.facebook_test
&& is_udp
))
360 __sync_fetch_and_add(&ms_stats
.active_conns
, 1);
368 * when doing 100% get operation, it could preset some objects
369 * to warmup the server. this function is used to initialize the
370 * number of the objects to preset.
372 * @param c, pointer of the concurrency
374 static void ms_warmup_num_init(ms_conn_t
*c
)
376 /* no set operation, preset all the items in the window */
377 if (ms_setting
.cmd_distr
[CMD_SET
].cmd_prop
< PROP_ERROR
)
379 c
->warmup_num
= c
->win_size
;
380 c
->remain_warmup_num
= c
->warmup_num
;
385 c
->remain_warmup_num
= c
->warmup_num
;
387 } /* ms_warmup_num_init */
391 * each connection has an item window, this function initialize
392 * the window. The window is used to generate task.
394 * @param c, pointer of the concurrency
396 * @return int, if success, return 0, else return -1
398 static int ms_item_win_init(ms_conn_t
*c
)
402 c
->win_size
= (int)ms_setting
.win_size
;
404 c
->exec_num
= ms_thread
.thread_ctx
->exec_num_perconn
;
405 c
->remain_exec_num
= c
->exec_num
;
407 c
->item_win
= (ms_task_item_t
*)malloc(
408 sizeof(ms_task_item_t
) * (size_t)c
->win_size
);
409 if (c
->item_win
== NULL
)
411 fprintf(stderr
, "Can't allocate task item array for conn.\n");
414 memset(c
->item_win
, 0, sizeof(ms_task_item_t
) * (size_t)c
->win_size
);
416 for (int i
= 0; i
< c
->win_size
; i
++)
418 c
->item_win
[i
].key_size
= (int)ms_setting
.distr
[i
].key_size
;
419 c
->item_win
[i
].key_prefix
= ms_get_key_prefix();
420 c
->item_win
[i
].key_suffix_offset
= ms_setting
.distr
[i
].key_offset
;
421 c
->item_win
[i
].value_size
= (int)ms_setting
.distr
[i
].value_size
;
422 c
->item_win
[i
].value_offset
= INVALID_OFFSET
; /* default in invalid offset */
423 c
->item_win
[i
].client_time
= 0;
425 /* set expire time base on the proportion */
426 if (exp_cnt
< ms_setting
.exp_ver_per
* i
)
428 c
->item_win
[i
].exp_time
= FIXED_EXPIRE_TIME
;
433 c
->item_win
[i
].exp_time
= 0;
437 ms_warmup_num_init(c
);
440 } /* ms_item_win_init */
444 * each connection structure can include one or more sock
445 * handlers. this function create these socks and connect the
448 * @param c, pointer of the concurrency
450 * @return int, if success, return 0, else return -1
452 static int ms_conn_sock_init(ms_conn_t
*c
)
459 assert(c
->tcpsfd
!= NULL
);
461 for (i
= 0; i
< c
->total_sfds
; i
++)
464 if (ms_setting
.rep_write_srv
> 0)
466 /* for replication, each connection need connect all the server */
471 /* all the connections in a thread connects the same server */
472 srv_idx
= ms_thread
.thread_ctx
->srv_idx
;
475 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
476 ms_setting
.servers
[srv_idx
].srv_port
,
477 ms_setting
.udp
, &ret_sfd
) != 0)
487 if (! ms_setting
.udp
)
489 c
->tcpsfd
[i
]= ret_sfd
;
495 /* initialize udp sock handler if necessary */
496 if (ms_setting
.facebook_test
)
499 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
500 ms_setting
.servers
[srv_idx
].srv_port
,
501 true, &ret_sfd
) != 0)
511 if ((i
!= c
->total_sfds
) || (ms_setting
.facebook_test
&& (c
->udpsfd
== 0)))
519 for (int j
= 0; j
< i
; j
++)
534 } /* ms_conn_sock_init */
538 * each connection is managed by libevent, this function
539 * initialize the event of the connection structure.
541 * @param c, pointer of the concurrency
543 * @return int, if success, return 0, else return -1
545 static int ms_conn_event_init(ms_conn_t
*c
)
547 /* default event timeout 10 seconds */
550 .tv_sec
= EVENT_TIMEOUT
, .tv_usec
= 0
552 short event_flags
= EV_WRITE
| EV_PERSIST
;
554 event_set(&c
->event
, c
->sfd
, event_flags
, ms_event_handler
, (void *)c
);
555 event_base_set(ms_thread
.base
, &c
->event
);
556 c
->ev_flags
= event_flags
;
558 if (c
->total_sfds
== 1)
560 if (event_add(&c
->event
, NULL
) == -1)
567 if (event_add(&c
->event
, &t
) == -1)
574 } /* ms_conn_event_init */
578 * setup a connection, each connection structure of each
579 * thread must call this function to initialize.
581 * @param c, pointer of the concurrency
583 * @return int, if success, return 0, else return -1
585 int ms_setup_conn(ms_conn_t
*c
)
587 if (ms_item_win_init(c
) != 0)
592 if (ms_conn_init(c
, conn_write
, DATA_BUFFER_SIZE
, ms_setting
.udp
) != 0)
597 if (ms_conn_sock_init(c
) != 0)
602 if (ms_conn_event_init(c
) != 0)
608 } /* ms_setup_conn */
612 * Frees a connection.
614 * @param c, pointer of the concurrency
616 void ms_conn_free(ms_conn_t
*c
)
620 if (c
->hdrbuf
!= NULL
)
622 if (c
->msglist
!= NULL
)
630 if (c
->mlget_task
.mlget_item
!= NULL
)
631 free(c
->mlget_task
.mlget_item
);
632 if (c
->rudpbuf
!= NULL
)
634 if (c
->udppkt
!= NULL
)
636 if (c
->item_win
!= NULL
)
638 if (c
->tcpsfd
!= NULL
)
641 if (--ms_thread
.nactive_conn
== 0)
643 free(ms_thread
.conn
);
652 * @param c, pointer of the concurrency
654 static void ms_conn_close(ms_conn_t
*c
)
658 /* delete the event, the socket and the connection */
659 event_del(&c
->event
);
661 for (int i
= 0; i
< c
->total_sfds
; i
++)
663 if (c
->tcpsfd
[i
] > 0)
670 if (ms_setting
.facebook_test
)
675 __sync_fetch_and_sub(&ms_stats
.active_conns
, 1);
679 if (ms_setting
.run_time
== 0)
681 pthread_mutex_lock(&ms_global
.run_lock
.lock
);
682 ms_global
.run_lock
.count
++;
683 pthread_cond_signal(&ms_global
.run_lock
.cond
);
684 pthread_mutex_unlock(&ms_global
.run_lock
.lock
);
687 if (ms_thread
.nactive_conn
== 0)
691 } /* ms_conn_close */
697 * @param ai, server address information
699 * @return int, if success, return 0, else return -1
701 static int ms_new_socket(struct addrinfo
*ai
)
705 if ((sfd
= socket(ai
->ai_family
, ai
->ai_socktype
, ai
->ai_protocol
)) == -1)
707 fprintf(stderr
, "socket() error: %s.\n", strerror(errno
));
712 } /* ms_new_socket */
716 * Sets a socket's send buffer size to the maximum allowed by the system.
718 * @param sfd, file descriptor of socket
720 static void ms_maximize_sndbuf(const int sfd
)
722 socklen_t intsize
= sizeof(int);
723 unsigned int last_good
= 0;
724 unsigned int min
, max
, avg
;
725 unsigned int old_size
;
727 /* Start with the default size. */
728 if (getsockopt(sfd
, SOL_SOCKET
, SO_SNDBUF
, &old_size
, &intsize
) != 0)
730 fprintf(stderr
, "getsockopt(SO_SNDBUF)\n");
734 /* Binary-search for the real maximum. */
736 max
= MAX_SENDBUF_SIZE
;
740 avg
= ((unsigned int)(min
+ max
)) / 2;
741 if (setsockopt(sfd
, SOL_SOCKET
, SO_SNDBUF
, (void *)&avg
, intsize
) == 0)
751 } /* ms_maximize_sndbuf */
755 * socket connects the server
757 * @param c, pointer of the concurrency
758 * @param srv_host_name, the host name of the server
759 * @param srv_port, port of server
760 * @param is_udp, whether it's udp
761 * @param ret_sfd, the connected socket file descriptor
763 * @return int, if success, return 0, else return -1
765 static int ms_network_connect(ms_conn_t
*c
,
777 struct addrinfo
*next
;
778 struct addrinfo hints
;
779 char port_buf
[NI_MAXSERV
];
786 * the memset call clears nonstandard fields in some impementations
787 * that otherwise mess things up.
789 memset(&hints
, 0, sizeof(hints
));
790 hints
.ai_flags
= AI_PASSIVE
| AI_ADDRCONFIG
;
793 hints
.ai_protocol
= IPPROTO_UDP
;
794 hints
.ai_socktype
= SOCK_DGRAM
;
795 hints
.ai_family
= AF_INET
; /* This left here because of issues with OSX 10.5 */
799 hints
.ai_family
= AF_UNSPEC
;
800 hints
.ai_protocol
= IPPROTO_TCP
;
801 hints
.ai_socktype
= SOCK_STREAM
;
804 snprintf(port_buf
, NI_MAXSERV
, "%d", srv_port
);
805 error
= getaddrinfo(srv_host_name
, port_buf
, &hints
, &ai
);
808 if (error
!= EAI_SYSTEM
)
809 fprintf(stderr
, "getaddrinfo(): %s.\n", gai_strerror(error
));
811 perror("getaddrinfo()\n");
816 for (next
= ai
; next
; next
= next
->ai_next
)
818 if ((sfd
= ms_new_socket(next
)) == -1)
824 setsockopt(sfd
, SOL_SOCKET
, SO_REUSEADDR
, (void *)&flags
, sizeof(flags
));
827 ms_maximize_sndbuf(sfd
);
831 setsockopt(sfd
, SOL_SOCKET
, SO_KEEPALIVE
, (void *)&flags
,
833 setsockopt(sfd
, SOL_SOCKET
, SO_LINGER
, (void *)&ling
, sizeof(ling
));
834 setsockopt(sfd
, IPPROTO_TCP
, TCP_NODELAY
, (void *)&flags
,
840 c
->srv_recv_addr_size
= sizeof(struct sockaddr
);
841 memcpy(&c
->srv_recv_addr
, next
->ai_addr
, c
->srv_recv_addr_size
);
845 if (connect(sfd
, next
->ai_addr
, next
->ai_addrlen
) == -1)
853 if (((flags
= fcntl(sfd
, F_GETFL
, 0)) < 0)
854 || (fcntl(sfd
, F_SETFL
, flags
| O_NONBLOCK
) < 0))
856 fprintf(stderr
, "setting O_NONBLOCK\n");
872 /* Return zero if we detected no errors in starting up connections */
874 } /* ms_network_connect */
878 * reconnect a disconnected sock
880 * @param c, pointer of the concurrency
882 * @return int, if success, return 0, else return -1
884 static int ms_reconn(ms_conn_t
*c
)
889 if (ms_setting
.rep_write_srv
> 0)
892 srv_conn_cnt
= ms_setting
.nconns
;
896 srv_idx
= ms_thread
.thread_ctx
->srv_idx
;
897 srv_conn_cnt
= ms_setting
.nconns
/ ms_setting
.srv_cnt
;
900 /* close the old socket handler */
902 c
->tcpsfd
[c
->cur_idx
]= 0;
904 if (__sync_fetch_and_add(&ms_setting
.servers
[srv_idx
].disconn_cnt
, 1)
907 gettimeofday(&ms_setting
.servers
[srv_idx
].disconn_time
, NULL
);
908 fprintf(stderr
, "Server %s:%d disconnect\n",
909 ms_setting
.servers
[srv_idx
].srv_host_name
,
910 ms_setting
.servers
[srv_idx
].srv_port
);
913 if (ms_setting
.rep_write_srv
> 0)
916 for (i
= 0; i
< c
->total_sfds
; i
++)
918 if (c
->tcpsfd
[i
] != 0)
924 /* all socks disconnect */
925 if (i
== c
->total_sfds
)
934 /* reconnect success, break the loop */
935 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
936 ms_setting
.servers
[srv_idx
].srv_port
,
937 ms_setting
.udp
, &c
->sfd
) == 0)
939 c
->tcpsfd
[c
->cur_idx
]= c
->sfd
;
940 if (__sync_fetch_and_add(&ms_setting
.servers
[srv_idx
].reconn_cnt
, 1)
943 gettimeofday(&ms_setting
.servers
[srv_idx
].reconn_time
, NULL
);
945 (int)(ms_setting
.servers
[srv_idx
].reconn_time
.tv_sec
946 - ms_setting
.servers
[srv_idx
].disconn_time
948 fprintf(stderr
, "Server %s:%d reconnect after %ds\n",
949 ms_setting
.servers
[srv_idx
].srv_host_name
,
950 ms_setting
.servers
[srv_idx
].srv_port
, reconn_time
);
955 if (c
->total_sfds
== 1)
957 /* wait a second and reconnect */
961 while (c
->total_sfds
== 1);
964 if ((c
->total_sfds
> 1) && (c
->tcpsfd
[c
->cur_idx
] == 0))
975 * reconnect several disconnected socks in the connection
976 * structure, the ever-1-second timer of the thread will check
977 * whether some socks in the connections disconnect. if
978 * disconnect, reconnect the sock.
980 * @param c, pointer of the concurrency
982 * @return int, if success, return 0, else return -1
984 int ms_reconn_socks(ms_conn_t
*c
)
989 struct timeval cur_time
;
993 if ((c
->total_sfds
== 1) || (c
->total_sfds
== c
->alive_sfds
))
998 for (int i
= 0; i
< c
->total_sfds
; i
++)
1000 if (c
->tcpsfd
[i
] == 0)
1002 gettimeofday(&cur_time
, NULL
);
1005 * For failover test of replication, reconnect the socks after
1006 * it disconnects more than 5 seconds, Otherwise memslap will
1007 * block at connect() function and the work threads can't work
1011 - ms_setting
.servers
[srv_idx
].disconn_time
.tv_sec
< 5)
1016 if (ms_setting
.rep_write_srv
> 0)
1019 srv_conn_cnt
= ms_setting
.nconns
;
1023 srv_idx
= ms_thread
.thread_ctx
->srv_idx
;
1024 srv_conn_cnt
= ms_setting
.nconns
/ ms_setting
.srv_cnt
;
1027 if (ms_network_connect(c
, ms_setting
.servers
[srv_idx
].srv_host_name
,
1028 ms_setting
.servers
[srv_idx
].srv_port
,
1029 ms_setting
.udp
, &ret_sfd
) == 0)
1031 c
->tcpsfd
[i
]= ret_sfd
;
1034 if (__sync_fetch_and_add(&ms_setting
.servers
[srv_idx
].reconn_cnt
, 1)
1035 % srv_conn_cnt
== 0)
1037 gettimeofday(&ms_setting
.servers
[srv_idx
].reconn_time
, NULL
);
1039 (int)(ms_setting
.servers
[srv_idx
].reconn_time
.tv_sec
1040 - ms_setting
.servers
[srv_idx
].disconn_time
1042 fprintf(stderr
, "Server %s:%d reconnect after %ds\n",
1043 ms_setting
.servers
[srv_idx
].srv_host_name
,
1044 ms_setting
.servers
[srv_idx
].srv_port
, reconn_time
);
1051 } /* ms_reconn_socks */
1055 * Tokenize the command string by replacing whitespace with '\0' and update
1056 * the token array tokens with pointer to start of each token and length.
1057 * Returns total number of tokens. The last valid token is the terminal
1058 * token (value points to the first unprocessed character of the string and
1063 * while(ms_tokenize_command(command, ncommand, tokens, max_tokens) > 0) {
1064 * for(int ix = 0; tokens[ix].length != 0; ix++) {
1067 * ncommand = tokens[ix].value - command;
1068 * command = tokens[ix].value;
1071 * @param command, the command string to token
1072 * @param tokens, array to store tokens
1073 * @param max_tokens, maximum tokens number
1075 * @return int, the number of tokens
1077 static int ms_tokenize_command(char *command
,
1079 const int max_tokens
)
1084 assert(command
!= NULL
&& tokens
!= NULL
&& max_tokens
> 1);
1086 for (s
= e
= command
; ntokens
< max_tokens
- 1; ++e
)
1092 tokens
[ntokens
].value
= s
;
1093 tokens
[ntokens
].length
= (size_t)(e
- s
);
1099 else if (*e
== '\0')
1103 tokens
[ntokens
].value
= s
;
1104 tokens
[ntokens
].length
= (size_t)(e
- s
);
1108 break; /* string end */
1113 } /* ms_tokenize_command */
1117 * parse the response of server.
1119 * @param c, pointer of the concurrency
1120 * @param command, the string responded by server
1122 * @return int, if the command completed return 0, else return
1125 static int ms_ascii_process_line(ms_conn_t
*c
, char *command
)
1129 char *buffer
= command
;
1134 * for command get, we store the returned value into local buffer
1135 * then continue in ms_complete_nread().
1140 case 'V': /* VALUE || VERSION */
1141 if (buffer
[1] == 'A') /* VALUE */
1143 token_t tokens
[MAX_TOKENS
];
1144 ms_tokenize_command(command
, tokens
, MAX_TOKENS
);
1145 value_len
= strtol(tokens
[VALUELEN_TOKEN
].value
, NULL
, 10);
1146 c
->currcmd
.key_prefix
= *(uint64_t *)tokens
[KEY_TOKEN
].value
;
1149 * We read the \r\n into the string since not doing so is more
1150 * cycles then the waster of memory to do so.
1152 * We are null terminating through, which will most likely make
1153 * some people lazy about using the return length.
1155 c
->rvbytes
= (int)(value_len
+ 2);
1163 c
->currcmd
.retstat
= MCD_SUCCESS
;
1165 case 'S': /* STORED STATS SERVER_ERROR */
1166 if (buffer
[2] == 'A') /* STORED STATS */
1168 c
->currcmd
.retstat
= MCD_STAT
;
1170 else if (buffer
[1] == 'E')
1173 printf("<%d %s\n", c
->sfd
, buffer
);
1175 c
->currcmd
.retstat
= MCD_SERVER_ERROR
;
1177 else if (buffer
[1] == 'T')
1180 c
->currcmd
.retstat
= MCD_STORED
;
1184 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1188 case 'D': /* DELETED DATA */
1189 if (buffer
[1] == 'E')
1191 c
->currcmd
.retstat
= MCD_DELETED
;
1195 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1200 case 'N': /* NOT_FOUND NOT_STORED*/
1201 if (buffer
[4] == 'F')
1203 c
->currcmd
.retstat
= MCD_NOTFOUND
;
1205 else if (buffer
[4] == 'S')
1207 printf("<%d %s\n", c
->sfd
, buffer
);
1208 c
->currcmd
.retstat
= MCD_NOTSTORED
;
1212 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1216 case 'E': /* PROTOCOL ERROR or END */
1217 if (buffer
[1] == 'N')
1220 c
->currcmd
.retstat
= MCD_END
;
1222 else if (buffer
[1] == 'R')
1224 printf("<%d ERROR\n", c
->sfd
);
1225 c
->currcmd
.retstat
= MCD_PROTOCOL_ERROR
;
1227 else if (buffer
[1] == 'X')
1229 c
->currcmd
.retstat
= MCD_DATA_EXISTS
;
1230 printf("<%d %s\n", c
->sfd
, buffer
);
1234 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1238 case 'C': /* CLIENT ERROR */
1239 printf("<%d %s\n", c
->sfd
, buffer
);
1240 c
->currcmd
.retstat
= MCD_CLIENT_ERROR
;
1244 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
1249 } /* ms_ascii_process_line */
1253 * after one operation completes, reset the concurrency
1255 * @param c, pointer of the concurrency
1256 * @param timeout, whether it's timeout
1258 void ms_reset_conn(ms_conn_t
*c
, bool timeout
)
1264 if ((c
->packets
> 0) && (c
->packets
< MAX_UDP_PACKET
))
1266 memset(c
->udppkt
, 0, sizeof(ms_udppkt_t
) * (uint64_t)c
->packets
);
1275 c
->currcmd
.isfinish
= true;
1279 ms_conn_set_state(c
, conn_write
);
1280 memcpy(&c
->precmd
, &c
->currcmd
, sizeof(ms_cmdstat_t
)); /* replicate command state */
1284 ms_drive_machine(c
);
1286 } /* ms_reset_conn */
1290 * if we have a complete line in the buffer, process it.
1292 * @param c, pointer of the concurrency
1294 * @return int, if success, return 0, else return -1
1296 static int ms_try_read_line(ms_conn_t
*c
)
1298 if (c
->protocol
== binary_prot
)
1300 /* Do we have the complete packet header? */
1301 if ((uint64_t)c
->rbytes
< sizeof(c
->binary_header
))
1303 /* need more data! */
1309 if (((long)(c
->rcurr
)) % 8 != 0)
1311 /* must realign input buffer */
1312 memmove(c
->rbuf
, c
->rcurr
, c
->rbytes
);
1314 if (settings
.verbose
)
1316 fprintf(stderr
, "%d: Realign input buffer.\n", c
->sfd
);
1320 protocol_binary_response_header
*rsp
;
1321 rsp
= (protocol_binary_response_header
*)c
->rcurr
;
1323 c
->binary_header
= *rsp
;
1324 c
->binary_header
.response
.extlen
= rsp
->response
.extlen
;
1325 c
->binary_header
.response
.keylen
= ntohl(rsp
->response
.keylen
);
1326 c
->binary_header
.response
.bodylen
= ntohl(rsp
->response
.bodylen
);
1327 c
->binary_header
.response
.status
= ntohl(rsp
->response
.status
);
1329 if (c
->binary_header
.response
.magic
!= PROTOCOL_BINARY_RES
)
1331 fprintf(stderr
, "Invalid magic: %x\n",
1332 c
->binary_header
.response
.magic
);
1333 ms_conn_set_state(c
, conn_closing
);
1337 /* process this complete response */
1338 if (ms_bin_process_response(c
) == 0)
1340 /* current operation completed */
1341 ms_reset_conn(c
, false);
1346 c
->rbytes
-= (int32_t)sizeof(c
->binary_header
);
1347 c
->rcurr
+= sizeof(c
->binary_header
);
1356 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1361 el
= memchr(c
->rcurr
, '\n', (size_t)c
->rbytes
);
1366 if (((el
- c
->rcurr
) > 1) && (*(el
- 1) == '\r'))
1372 assert(cont
<= (c
->rcurr
+ c
->rbytes
));
1374 /* process this complete line */
1375 if (ms_ascii_process_line(c
, c
->rcurr
) == 0)
1377 /* current operation completed */
1378 ms_reset_conn(c
, false);
1383 /* current operation didn't complete */
1384 c
->rbytes
-= (int32_t)(cont
- c
->rcurr
);
1388 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1392 } /* ms_try_read_line */
1396 * because the packet of UDP can't ensure the order, the
1397 * function is used to sort the received udp packet.
1399 * @param c, pointer of the concurrency
1400 * @param buf, the buffer to store the ordered packages data
1401 * @param rbytes, the maximum capacity of the buffer
1403 * @return int, if success, return the copy bytes, else return
1406 static int ms_sort_udp_packet(ms_conn_t
*c
, char *buf
, int rbytes
)
1411 uint16_t seq_num
= 0;
1412 uint16_t packets
= 0;
1413 unsigned char *header
= NULL
;
1415 /* no enough data */
1417 assert(buf
!= NULL
);
1418 assert(c
->rudpbytes
>= UDP_HEADER_SIZE
);
1420 /* calculate received packets count */
1421 if (c
->rudpbytes
% UDP_MAX_PAYLOAD_SIZE
>= UDP_HEADER_SIZE
)
1423 /* the last packet has some data */
1424 c
->recvpkt
= c
->rudpbytes
/ UDP_MAX_PAYLOAD_SIZE
+ 1;
1428 c
->recvpkt
= c
->rudpbytes
/ UDP_MAX_PAYLOAD_SIZE
;
1431 /* get the total packets count if necessary */
1432 if (c
->packets
== 0)
1434 c
->packets
= HEADER_TO_PACKETS((unsigned char *)c
->rudpbuf
);
1437 /* build the ordered packet array */
1438 for (int i
= c
->pktcurr
; i
< c
->recvpkt
; i
++)
1440 header
= (unsigned char *)c
->rudpbuf
+ i
* UDP_MAX_PAYLOAD_SIZE
;
1441 req_id
= (uint16_t)HEADER_TO_REQID(header
);
1442 assert(req_id
== c
->request_id
% (1 << 16));
1444 packets
= (uint16_t)HEADER_TO_PACKETS(header
);
1445 assert(c
->packets
== HEADER_TO_PACKETS(header
));
1447 seq_num
= (uint16_t)HEADER_TO_SEQNUM(header
);
1448 c
->udppkt
[seq_num
].header
= header
;
1449 c
->udppkt
[seq_num
].data
= (char *)header
+ UDP_HEADER_SIZE
;
1451 if (i
== c
->recvpkt
- 1)
1453 /* last received packet */
1454 if (c
->rudpbytes
% UDP_MAX_PAYLOAD_SIZE
== 0)
1456 c
->udppkt
[seq_num
].rbytes
= UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
;
1461 c
->udppkt
[seq_num
].rbytes
= c
->rudpbytes
% UDP_MAX_PAYLOAD_SIZE
1467 c
->udppkt
[seq_num
].rbytes
= UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
;
1472 for (int i
= c
->ordcurr
; i
< c
->recvpkt
; i
++)
1474 /* there is some data to copy */
1475 if ((c
->udppkt
[i
].data
!= NULL
)
1476 && (c
->udppkt
[i
].copybytes
< c
->udppkt
[i
].rbytes
))
1478 header
= c
->udppkt
[i
].header
;
1479 len
= c
->udppkt
[i
].rbytes
- c
->udppkt
[i
].copybytes
;
1480 if (len
> rbytes
- wbytes
)
1482 len
= rbytes
- wbytes
;
1485 assert(len
<= rbytes
- wbytes
);
1486 assert(i
== HEADER_TO_SEQNUM(header
));
1488 memcpy(buf
+ wbytes
, c
->udppkt
[i
].data
+ c
->udppkt
[i
].copybytes
,
1491 c
->udppkt
[i
].copybytes
+= len
;
1493 if ((c
->udppkt
[i
].copybytes
== c
->udppkt
[i
].rbytes
)
1494 && (c
->udppkt
[i
].rbytes
== UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
))
1496 /* finish copying all the data of this packet, next */
1500 /* last received packet, and finish copying all the data */
1501 if ((c
->recvpkt
== c
->packets
) && (i
== c
->recvpkt
- 1)
1502 && (c
->udppkt
[i
].copybytes
== c
->udppkt
[i
].rbytes
))
1507 /* no space to copy data */
1508 if (wbytes
>= rbytes
)
1513 /* it doesn't finish reading all the data of the packet from network */
1514 if ((i
!= c
->recvpkt
- 1)
1515 && (c
->udppkt
[i
].rbytes
< UDP_MAX_PAYLOAD_SIZE
- UDP_HEADER_SIZE
))
1522 /* no data to copy */
1527 return wbytes
== 0 ? -1 : wbytes
;
1528 } /* ms_sort_udp_packet */
1532 * encapsulate upd read like tcp read
1534 * @param c, pointer of the concurrency
1535 * @param buf, read buffer
1536 * @param len, length to read
1538 * @return int, if success, return the read bytes, else return
1541 static int ms_udp_read(ms_conn_t
*c
, char *buf
, int len
)
1552 if (c
->rudpbytes
+ UDP_MAX_PAYLOAD_SIZE
> c
->rudpsize
)
1554 char *new_rbuf
= realloc(c
->rudpbuf
, (size_t)c
->rudpsize
* 2);
1557 fprintf(stderr
, "Couldn't realloc input buffer.\n");
1558 c
->rudpbytes
= 0; /* ignore what we read */
1561 c
->rudpbuf
= new_rbuf
;
1565 avail
= c
->rudpsize
- c
->rudpbytes
;
1566 /* UDP each time read a packet, 1400 bytes */
1567 res
= (int)read(c
->sfd
, c
->rudpbuf
+ c
->rudpbytes
, (size_t)avail
);
1571 __sync_fetch_and_add(&ms_stats
.bytes_read
, res
);
1586 /* "connection" closed */
1592 /* no data to read */
1597 /* copy data to read buffer */
1600 copybytes
= ms_sort_udp_packet(c
, buf
, len
);
1603 if (copybytes
== -1)
1605 __sync_fetch_and_add(&ms_stats
.pkt_disorder
, 1);
1613 * read from network as much as we can, handle buffer overflow and connection
1615 * before reading, move the remaining incomplete fragment of a command
1616 * (if any) to the beginning of the buffer.
1617 * return 0 if there's nothing to read on the first read.
1621 * read from network as much as we can, handle buffer overflow and connection
1622 * close. before reading, move the remaining incomplete fragment of a command
1623 * (if any) to the beginning of the buffer.
1625 * @param c, pointer of the concurrency
1628 * return 0 if there's nothing to read on the first read.
1629 * return 1 if get data
1630 * return -1 if error happens
1632 static int ms_try_read_network(ms_conn_t
*c
)
1640 if ((c
->rcurr
!= c
->rbuf
)
1641 && (! c
->readval
|| (c
->rvbytes
> c
->rsize
- (c
->rcurr
- c
->rbuf
))
1642 || (c
->readval
&& (c
->rcurr
- c
->rbuf
> c
->rbytes
))))
1644 if (c
->rbytes
!= 0) /* otherwise there's nothing to copy */
1645 memmove(c
->rbuf
, c
->rcurr
, (size_t)c
->rbytes
);
1651 if (c
->rbytes
>= c
->rsize
)
1653 char *new_rbuf
= realloc(c
->rbuf
, (size_t)c
->rsize
* 2);
1656 fprintf(stderr
, "Couldn't realloc input buffer.\n");
1657 c
->rbytes
= 0; /* ignore what we read */
1660 c
->rcurr
= c
->rbuf
= new_rbuf
;
1664 avail
= c
->rsize
- c
->rbytes
- (c
->rcurr
- c
->rbuf
);
1672 res
= (int32_t)ms_udp_read(c
, c
->rcurr
+ c
->rbytes
, (int32_t)avail
);
1676 res
= (int)read(c
->sfd
, c
->rcurr
+ c
->rbytes
, (size_t)avail
);
1683 __sync_fetch_and_add(&ms_stats
.bytes_read
, res
);
1698 /* connection closed */
1699 ms_conn_set_state(c
, conn_closing
);
1704 if ((errno
== EAGAIN
) || (errno
== EWOULDBLOCK
))
1706 /* Should close on unhandled errors. */
1707 ms_conn_set_state(c
, conn_closing
);
1713 } /* ms_try_read_network */
1717 * after get the object from server, verify the value if
1720 * @param c, pointer of the concurrency
1721 * @param mlget_item, pointer of mulit-get task item structure
1722 * @param value, received value string
1723 * @param vlen, received value string length
1725 static void ms_verify_value(ms_conn_t
*c
,
1726 ms_mlget_task_item_t
*mlget_item
,
1730 if (c
->curr_task
.verify
)
1732 assert(c
->curr_task
.item
->value_offset
!= INVALID_OFFSET
);
1733 char *orignval
= &ms_setting
.char_block
[c
->curr_task
.item
->value_offset
];
1735 &ms_setting
.char_block
[c
->curr_task
.item
->key_suffix_offset
];
1737 /* verify expire time if necessary */
1738 if (c
->curr_task
.item
->exp_time
> 0)
1740 struct timeval curr_time
;
1741 gettimeofday(&curr_time
, NULL
);
1743 /* object expired but get it now */
1744 if (curr_time
.tv_sec
- c
->curr_task
.item
->client_time
1745 > c
->curr_task
.item
->exp_time
+ EXPIRE_TIME_ERROR
)
1747 __sync_fetch_and_add(&ms_stats
.exp_get
, 1);
1749 if (ms_setting
.verbose
)
1753 strftime(set_time
, 64, "%Y-%m-%d %H:%M:%S",
1754 localtime(&c
->curr_task
.item
->client_time
));
1755 strftime(cur_time
, 64, "%Y-%m-%d %H:%M:%S",
1756 localtime(&curr_time
.tv_sec
));
1758 "\n<%d expire time verification failed, "
1759 "object expired but get it now\n"
1762 "\tset time: %s current time: %s "
1763 "diff time: %d expire time: %d\n"
1764 "\texpected data: \n"
1765 "\treceived data len: %d\n"
1766 "\treceived data: %.*s\n",
1768 c
->curr_task
.item
->key_size
,
1769 c
->curr_task
.item
->key_prefix
,
1770 c
->curr_task
.item
->key_size
- (int)KEY_PREFIX_SIZE
,
1774 (int)(curr_time
.tv_sec
- c
->curr_task
.item
->client_time
),
1775 c
->curr_task
.item
->exp_time
,
1785 if ((c
->curr_task
.item
->value_size
!= vlen
)
1786 || (memcmp(orignval
, value
, (size_t)vlen
) != 0))
1788 __sync_fetch_and_add(&ms_stats
.vef_failed
, 1);
1790 if (ms_setting
.verbose
)
1793 "\n<%d data verification failed\n"
1796 "\texpected data len: %d\n"
1797 "\texpected data: %.*s\n"
1798 "\treceived data len: %d\n"
1799 "\treceived data: %.*s\n",
1801 c
->curr_task
.item
->key_size
,
1802 c
->curr_task
.item
->key_prefix
,
1803 c
->curr_task
.item
->key_size
- (int)KEY_PREFIX_SIZE
,
1805 c
->curr_task
.item
->value_size
,
1806 c
->curr_task
.item
->value_size
,
1816 c
->curr_task
.finish_verify
= true;
1818 if (mlget_item
!= NULL
)
1820 mlget_item
->finish_verify
= true;
1823 } /* ms_verify_value */
1827 * For ASCII protocol, after store the data into the local
1828 * buffer, run this function to handle the data.
1830 * @param c, pointer of the concurrency
1832 static void ms_ascii_complete_nread(ms_conn_t
*c
)
1835 assert(c
->rbytes
>= c
->rvbytes
);
1836 assert(c
->protocol
== ascii_udp_prot
|| c
->protocol
== ascii_prot
);
1840 c
->rcurr
[c
->rvbytes
- 1] == '\n' && c
->rcurr
[c
->rvbytes
- 2] == '\r');
1844 ms_mlget_task_item_t
*mlget_item
= NULL
;
1845 if (((ms_setting
.mult_key_num
> 1)
1846 && (c
->mlget_task
.mlget_num
>= ms_setting
.mult_key_num
))
1847 || ((c
->remain_exec_num
== 0) && (c
->mlget_task
.mlget_num
> 0)))
1849 c
->mlget_task
.value_index
++;
1850 mlget_item
= &c
->mlget_task
.mlget_item
[c
->mlget_task
.value_index
];
1852 if (mlget_item
->item
->key_prefix
== c
->currcmd
.key_prefix
)
1854 c
->curr_task
.item
= mlget_item
->item
;
1855 c
->curr_task
.verify
= mlget_item
->verify
;
1856 c
->curr_task
.finish_verify
= mlget_item
->finish_verify
;
1857 mlget_item
->get_miss
= false;
1861 /* Try to find the task item in multi-get task array */
1862 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
1864 mlget_item
= &c
->mlget_task
.mlget_item
[i
];
1865 if (mlget_item
->item
->key_prefix
== c
->currcmd
.key_prefix
)
1867 c
->curr_task
.item
= mlget_item
->item
;
1868 c
->curr_task
.verify
= mlget_item
->verify
;
1869 c
->curr_task
.finish_verify
= mlget_item
->finish_verify
;
1870 mlget_item
->get_miss
= false;
1878 ms_verify_value(c
, mlget_item
, c
->rcurr
, c
->rvbytes
- 2);
1880 c
->curr_task
.get_miss
= false;
1881 c
->rbytes
-= c
->rvbytes
;
1882 c
->rcurr
= c
->rcurr
+ c
->rvbytes
;
1883 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1886 } /* ms_ascii_complete_nread */
1890 * For binary protocol, after store the data into the local
1891 * buffer, run this function to handle the data.
1893 * @param c, pointer of the concurrency
1895 static void ms_bin_complete_nread(ms_conn_t
*c
)
1898 assert(c
->rbytes
>= c
->rvbytes
);
1899 assert(c
->protocol
== binary_prot
);
1901 int extlen
= c
->binary_header
.response
.extlen
;
1902 int keylen
= c
->binary_header
.response
.keylen
;
1903 uint8_t opcode
= c
->binary_header
.response
.opcode
;
1905 /* not get command or not include value, just return */
1906 if (((opcode
!= PROTOCOL_BINARY_CMD_GET
)
1907 && (opcode
!= PROTOCOL_BINARY_CMD_GETQ
))
1908 || (c
->rvbytes
<= extlen
+ keylen
))
1911 if (c
->binary_header
.response
.opcode
== PROTOCOL_BINARY_CMD_GET
)
1913 c
->currcmd
.retstat
= MCD_END
;
1914 c
->curr_task
.get_miss
= true;
1919 ms_reset_conn(c
, false);
1924 ms_mlget_task_item_t
*mlget_item
= NULL
;
1925 if (((ms_setting
.mult_key_num
> 1)
1926 && (c
->mlget_task
.mlget_num
>= ms_setting
.mult_key_num
))
1927 || ((c
->remain_exec_num
== 0) && (c
->mlget_task
.mlget_num
> 0)))
1929 c
->mlget_task
.value_index
++;
1930 mlget_item
= &c
->mlget_task
.mlget_item
[c
->mlget_task
.value_index
];
1932 c
->curr_task
.item
= mlget_item
->item
;
1933 c
->curr_task
.verify
= mlget_item
->verify
;
1934 c
->curr_task
.finish_verify
= mlget_item
->finish_verify
;
1935 mlget_item
->get_miss
= false;
1940 c
->rcurr
+ extlen
+ keylen
,
1941 c
->rvbytes
- extlen
- keylen
);
1943 c
->currcmd
.retstat
= MCD_END
;
1944 c
->curr_task
.get_miss
= false;
1945 c
->rbytes
-= c
->rvbytes
;
1946 c
->rcurr
= c
->rcurr
+ c
->rvbytes
;
1947 assert(c
->rcurr
<= (c
->rbuf
+ c
->rsize
));
1951 if (ms_setting
.mult_key_num
> 1)
1953 /* multi-get have check all the item */
1954 if (c
->mlget_task
.value_index
== c
->mlget_task
.mlget_num
- 1)
1956 ms_reset_conn(c
, false);
1962 ms_reset_conn(c
, false);
1964 } /* ms_bin_complete_nread */
1968 * we get here after reading the value of get commands.
1970 * @param c, pointer of the concurrency
1972 static void ms_complete_nread(ms_conn_t
*c
)
1975 assert(c
->rbytes
>= c
->rvbytes
);
1976 assert(c
->protocol
== ascii_udp_prot
1977 || c
->protocol
== ascii_prot
1978 || c
->protocol
== binary_prot
);
1980 if (c
->protocol
== binary_prot
)
1982 ms_bin_complete_nread(c
);
1986 ms_ascii_complete_nread(c
);
1988 } /* ms_complete_nread */
1992 * Adds a message header to a connection.
1994 * @param c, pointer of the concurrency
1996 * @return int, if success, return 0, else return -1
1998 static int ms_add_msghdr(ms_conn_t
*c
)
2004 if (c
->msgsize
== c
->msgused
)
2007 realloc(c
->msglist
, (uint64_t)c
->msgsize
* 2 * sizeof(struct msghdr
));
2015 msg
= c
->msglist
+ c
->msgused
;
2018 * this wipes msg_iovlen, msg_control, msg_controllen, and
2019 * msg_flags, the last 3 of which aren't defined on solaris:
2021 memset(msg
, 0, sizeof(struct msghdr
));
2023 msg
->msg_iov
= &c
->iov
[c
->iovused
];
2025 if (c
->udp
&& (c
->srv_recv_addr_size
> 0))
2027 msg
->msg_name
= &c
->srv_recv_addr
;
2028 msg
->msg_namelen
= c
->srv_recv_addr_size
;
2036 /* Leave room for the UDP header, which we'll fill in later. */
2037 return ms_add_iov(c
, NULL
, UDP_HEADER_SIZE
);
2041 } /* ms_add_msghdr */
2045 * Ensures that there is room for another structure iovec in a connection's
2048 * @param c, pointer of the concurrency
2050 * @return int, if success, return 0, else return -1
2052 static int ms_ensure_iov_space(ms_conn_t
*c
)
2056 if (c
->iovused
>= c
->iovsize
)
2059 struct iovec
*new_iov
= (struct iovec
*)realloc(c
->iov
,
2060 ((uint64_t)c
->iovsize
2062 * sizeof(struct iovec
));
2069 /* Point all the msghdr structures at the new list. */
2070 for (i
= 0, iovnum
= 0; i
< c
->msgused
; i
++)
2072 c
->msglist
[i
].msg_iov
= &c
->iov
[iovnum
];
2073 iovnum
+= (int)c
->msglist
[i
].msg_iovlen
;
2078 } /* ms_ensure_iov_space */
2082 * Adds data to the list of pending data that will be written out to a
2085 * @param c, pointer of the concurrency
2086 * @param buf, the buffer includes data to send
2087 * @param len, the data length in the buffer
2089 * @return int, if success, return 0, else return -1
2091 static int ms_add_iov(ms_conn_t
*c
, const void *buf
, int len
)
2101 m
= &c
->msglist
[c
->msgused
- 1];
2104 * Limit UDP packets, to UDP_MAX_PAYLOAD_SIZE bytes.
2106 limit_to_mtu
= c
->udp
;
2108 /* We may need to start a new msghdr if this one is full. */
2109 if ((m
->msg_iovlen
== IOV_MAX
)
2110 || (limit_to_mtu
&& (c
->msgbytes
>= UDP_MAX_SEND_PAYLOAD_SIZE
)))
2113 m
= &c
->msglist
[c
->msgused
- 1];
2116 if (ms_ensure_iov_space(c
) != 0)
2119 /* If the fragment is too big to fit in the datagram, split it up */
2120 if (limit_to_mtu
&& (len
+ c
->msgbytes
> UDP_MAX_SEND_PAYLOAD_SIZE
))
2122 leftover
= len
+ c
->msgbytes
- UDP_MAX_SEND_PAYLOAD_SIZE
;
2130 m
= &c
->msglist
[c
->msgused
- 1];
2131 m
->msg_iov
[m
->msg_iovlen
].iov_base
= (void *)buf
;
2132 m
->msg_iov
[m
->msg_iovlen
].iov_len
= (size_t)len
;
2138 buf
= ((char *)buf
) + len
;
2141 while (leftover
> 0);
2148 * Constructs a set of UDP headers and attaches them to the outgoing messages.
2150 * @param c, pointer of the concurrency
2152 * @return int, if success, return 0, else return -1
2154 static int ms_build_udp_headers(ms_conn_t
*c
)
2161 c
->request_id
= ms_get_udp_request_id();
2163 if (c
->msgused
> c
->hdrsize
)
2167 new_hdrbuf
= realloc(c
->hdrbuf
,
2168 (size_t)c
->msgused
* 2 * UDP_HEADER_SIZE
);
2170 new_hdrbuf
= malloc((size_t)c
->msgused
* 2 * UDP_HEADER_SIZE
);
2174 c
->hdrbuf
= (unsigned char *)new_hdrbuf
;
2175 c
->hdrsize
= c
->msgused
* 2;
2178 /* If this is a multi-packet request, drop it. */
2179 if (c
->udp
&& (c
->msgused
> 1))
2181 fprintf(stderr
, "multi-packet request for UDP not supported.\n");
2186 for (i
= 0; i
< c
->msgused
; i
++)
2188 c
->msglist
[i
].msg_iov
[0].iov_base
= hdr
;
2189 c
->msglist
[i
].msg_iov
[0].iov_len
= UDP_HEADER_SIZE
;
2190 *hdr
++= (unsigned char)(c
->request_id
/ 256);
2191 *hdr
++= (unsigned char)(c
->request_id
% 256);
2192 *hdr
++= (unsigned char)(i
/ 256);
2193 *hdr
++= (unsigned char)(i
% 256);
2194 *hdr
++= (unsigned char)(c
->msgused
/ 256);
2195 *hdr
++= (unsigned char)(c
->msgused
% 256);
2196 *hdr
++= (unsigned char)1; /* support facebook memcached */
2197 *hdr
++= (unsigned char)0;
2199 ((unsigned char *)c
->msglist
[i
].msg_iov
[0].iov_base
2200 + UDP_HEADER_SIZE
));
2204 } /* ms_build_udp_headers */
2208 * Transmit the next chunk of data from our list of msgbuf structures.
2210 * @param c, pointer of the concurrency
2212 * @return TRANSMIT_COMPLETE All done writing.
2213 * TRANSMIT_INCOMPLETE More data remaining to write.
2214 * TRANSMIT_SOFT_ERROR Can't write any more right now.
2215 * TRANSMIT_HARD_ERROR Can't write (c->state is set to conn_closing)
2217 static int ms_transmit(ms_conn_t
*c
)
2221 if ((c
->msgcurr
< c
->msgused
)
2222 && (c
->msglist
[c
->msgcurr
].msg_iovlen
== 0))
2224 /* Finished writing the current msg; advance to the next. */
2228 if (c
->msgcurr
< c
->msgused
)
2231 struct msghdr
*m
= &c
->msglist
[c
->msgcurr
];
2233 res
= sendmsg(c
->sfd
, m
, 0);
2236 __sync_fetch_and_add(&ms_stats
.bytes_written
, res
);
2238 /* We've written some of the data. Remove the completed
2239 * iovec entries from the list of pending writes. */
2240 while (m
->msg_iovlen
> 0 && res
>= (ssize_t
)m
->msg_iov
->iov_len
)
2242 res
-= (ssize_t
)m
->msg_iov
->iov_len
;
2247 /* Might have written just part of the last iovec entry;
2248 * adjust it so the next write will do the rest. */
2251 m
->msg_iov
->iov_base
= (unsigned char *)m
->msg_iov
->iov_base
+ res
;
2252 m
->msg_iov
->iov_len
-= (uint64_t)res
;
2254 return TRANSMIT_INCOMPLETE
;
2256 if ((res
== -1) && ((errno
== EAGAIN
) || (errno
== EWOULDBLOCK
)))
2258 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2260 fprintf(stderr
, "Couldn't update event.\n");
2261 ms_conn_set_state(c
, conn_closing
);
2262 return TRANSMIT_HARD_ERROR
;
2264 return TRANSMIT_SOFT_ERROR
;
2267 /* if res==0 or res==-1 and error is not EAGAIN or EWOULDBLOCK,
2268 * we have a real error, on which we close the connection */
2269 fprintf(stderr
, "Failed to write, and not due to blocking.\n");
2271 ms_conn_set_state(c
, conn_closing
);
2272 return TRANSMIT_HARD_ERROR
;
2276 return TRANSMIT_COMPLETE
;
2282 * Shrinks a connection's buffers if they're too big. This prevents
2283 * periodic large "mget" response from server chewing lots of client
2286 * This should only be called in between requests since it can wipe output
2289 * @param c, pointer of the concurrency
2291 static void ms_conn_shrink(ms_conn_t
*c
)
2298 if ((c
->rsize
> READ_BUFFER_HIGHWAT
) && (c
->rbytes
< DATA_BUFFER_SIZE
))
2302 if (c
->rcurr
!= c
->rbuf
)
2303 memmove(c
->rbuf
, c
->rcurr
, (size_t)c
->rbytes
);
2305 newbuf
= (char *)realloc((void *)c
->rbuf
, DATA_BUFFER_SIZE
);
2310 c
->rsize
= DATA_BUFFER_SIZE
;
2315 if (c
->udp
&& (c
->rudpsize
> UDP_DATA_BUFFER_HIGHWAT
)
2316 && (c
->rudpbytes
+ UDP_MAX_PAYLOAD_SIZE
< UDP_DATA_BUFFER_SIZE
))
2318 char *new_rbuf
= (char *)realloc(c
->rudpbuf
, (size_t)c
->rudpsize
* 2);
2321 c
->rudpbuf
= new_rbuf
;
2322 c
->rudpsize
= UDP_DATA_BUFFER_SIZE
;
2324 /* TODO check error condition? */
2327 if (c
->msgsize
> MSG_LIST_HIGHWAT
)
2329 struct msghdr
*newbuf
= (struct msghdr
*)realloc(
2332 * sizeof(c
->msglist
[0]));
2336 c
->msgsize
= MSG_LIST_INITIAL
;
2338 /* TODO check error condition? */
2341 if (c
->iovsize
> IOV_LIST_HIGHWAT
)
2343 struct iovec
*newbuf
= (struct iovec
*)realloc((void *)c
->iov
,
2345 * sizeof(c
->iov
[0]));
2349 c
->iovsize
= IOV_LIST_INITIAL
;
2351 /* TODO check return value */
2353 } /* ms_conn_shrink */
2357 * Sets a connection's current state in the state machine. Any special
2358 * processing that needs to happen on certain state transitions can
2361 * @param c, pointer of the concurrency
2362 * @param state, connection state
2364 static void ms_conn_set_state(ms_conn_t
*c
, int state
)
2368 if (state
!= c
->state
)
2370 if (state
== conn_read
)
2376 } /* ms_conn_set_state */
2380 * update the event if socks change state. for example: when
2381 * change the listen scoket read event to sock write event, or
2382 * change socket handler, we could call this function.
2384 * @param c, pointer of the concurrency
2385 * @param new_flags, new event flags
2387 * @return bool, if success, return true, else return false
2389 static bool ms_update_event(ms_conn_t
*c
, const int new_flags
)
2391 /* default event timeout 10 seconds */
2394 .tv_sec
= EVENT_TIMEOUT
, .tv_usec
= 0
2399 struct event_base
*base
= c
->event
.ev_base
;
2400 if ((c
->ev_flags
== new_flags
) && (ms_setting
.rep_write_srv
== 0)
2401 && (! ms_setting
.facebook_test
|| (c
->total_sfds
== 1)))
2406 if (event_del(&c
->event
) == -1)
2408 /* try to delete the event again */
2409 if (event_del(&c
->event
) == -1)
2415 event_set(&c
->event
,
2420 event_base_set(base
, &c
->event
);
2421 c
->ev_flags
= (short)new_flags
;
2423 if (c
->total_sfds
== 1)
2425 if (event_add(&c
->event
, NULL
) == -1)
2432 if (event_add(&c
->event
, &t
) == -1)
2439 } /* ms_update_event */
2443 * If user want to get the expected throughput, we could limit
2444 * the performance of memslap. we could give up some work and
2445 * just wait a short time. The function is used to check this
2448 * @param c, pointer of the concurrency
2450 * @return bool, if success, return true, else return false
2452 static bool ms_need_yield(ms_conn_t
*c
)
2455 int64_t time_diff
= 0;
2456 struct timeval curr_time
;
2457 ms_task_t
*task
= &c
->curr_task
;
2459 if (ms_setting
.expected_tps
> 0)
2461 gettimeofday(&curr_time
, NULL
);
2462 time_diff
= ms_time_diff(&ms_thread
.startup_time
, &curr_time
);
2464 (int64_t)((task
->get_opt
2465 + task
->set_opt
) / ((uint64_t)time_diff
/ 1000000));
2467 /* current throughput is greater than expected throughput */
2468 if (tps
> ms_thread
.thread_ctx
->tps_perconn
)
2475 } /* ms_need_yield */
2479 * used to update the start time of each operation
2481 * @param c, pointer of the concurrency
2483 static void ms_update_start_time(ms_conn_t
*c
)
2485 ms_task_item_t
*item
= c
->curr_task
.item
;
2487 if ((ms_setting
.stat_freq
> 0) || c
->udp
2488 || ((c
->currcmd
.cmd
== CMD_SET
) && (item
->exp_time
> 0)))
2490 gettimeofday(&c
->start_time
, NULL
);
2491 if ((c
->currcmd
.cmd
== CMD_SET
) && (item
->exp_time
> 0))
2493 /* record the current time */
2494 item
->client_time
= c
->start_time
.tv_sec
;
2497 } /* ms_update_start_time */
2501 * run the state machine
2503 * @param c, pointer of the concurrency
2505 static void ms_drive_machine(ms_conn_t
*c
)
2518 if (c
->rbytes
>= c
->rvbytes
)
2520 ms_complete_nread(c
);
2526 if (ms_try_read_line(c
) != 0)
2532 if (ms_try_read_network(c
) != 0)
2537 /* doesn't read all the response data, wait event wake up */
2538 if (! c
->currcmd
.isfinish
)
2540 if (! ms_update_event(c
, EV_READ
| EV_PERSIST
))
2542 fprintf(stderr
, "Couldn't update event.\n");
2543 ms_conn_set_state(c
, conn_closing
);
2550 /* we have no command line and no data to read from network, next write */
2551 ms_conn_set_state(c
, conn_write
);
2552 memcpy(&c
->precmd
, &c
->currcmd
, sizeof(ms_cmdstat_t
)); /* replicate command state */
2557 if (! c
->ctnwrite
&& ms_need_yield(c
))
2561 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2563 fprintf(stderr
, "Couldn't update event.\n");
2564 ms_conn_set_state(c
, conn_closing
);
2571 if (! c
->ctnwrite
&& (ms_exec_task(c
) != 0))
2573 ms_conn_set_state(c
, conn_closing
);
2577 /* record the start time before starting to send data if necessary */
2578 if (! c
->ctnwrite
|| (c
->change_sfd
&& c
->ctnwrite
))
2582 c
->change_sfd
= false;
2584 ms_update_start_time(c
);
2587 /* change sfd if necessary */
2595 /* execute task until nothing need be written to network */
2596 if (! c
->ctnwrite
&& (c
->msgcurr
== c
->msgused
))
2598 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2600 fprintf(stderr
, "Couldn't update event.\n");
2601 ms_conn_set_state(c
, conn_closing
);
2608 switch (ms_transmit(c
))
2610 case TRANSMIT_COMPLETE
:
2611 /* we have no data to write to network, next wait repose */
2612 if (! ms_update_event(c
, EV_READ
| EV_PERSIST
))
2614 fprintf(stderr
, "Couldn't update event.\n");
2615 ms_conn_set_state(c
, conn_closing
);
2619 ms_conn_set_state(c
, conn_read
);
2624 case TRANSMIT_INCOMPLETE
:
2626 break; /* Continue in state machine. */
2628 case TRANSMIT_HARD_ERROR
:
2632 case TRANSMIT_SOFT_ERROR
:
2644 /* recovery mode, need reconnect if connection close */
2645 if (ms_setting
.reconnect
&& (! ms_global
.time_out
2646 || ((ms_setting
.run_time
== 0)
2647 && (c
->remain_exec_num
> 0))))
2649 if (ms_reconn(c
) != 0)
2656 ms_reset_conn(c
, false);
2658 if (c
->total_sfds
== 1)
2660 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2662 fprintf(stderr
, "Couldn't update event.\n");
2663 ms_conn_set_state(c
, conn_closing
);
2681 } /* ms_drive_machine */
2685 * the event handler of each thread
2687 * @param fd, the file descriptor of socket
2688 * @param which, event flag
2689 * @param arg, argument
2691 void ms_event_handler(const int fd
, const short which
, void *arg
)
2693 ms_conn_t
*c
= (ms_conn_t
*)arg
;
2703 "Catastrophic: event fd: %d doesn't match conn fd: %d\n",
2709 assert(fd
== c
->sfd
);
2711 /* event timeout, close the current connection */
2712 if (c
->which
== EV_TIMEOUT
)
2714 ms_conn_set_state(c
, conn_closing
);
2717 ms_drive_machine(c
);
2719 /* wait for next event */
2720 } /* ms_event_handler */
2724 * get the next socket descriptor index to run for replication
2726 * @param c, pointer of the concurrency
2727 * @param cmd, command(get or set )
2729 * @return int, if success, return the index, else return 0
2731 static int ms_get_rep_sock_index(ms_conn_t
*c
, int cmd
)
2736 if (c
->total_sfds
== 1)
2741 if (ms_setting
.rep_write_srv
== 0)
2750 for (i
= 0; i
< ms_setting
.rep_write_srv
; i
++)
2752 if (c
->tcpsfd
[i
] > 0)
2758 if (i
== ms_setting
.rep_write_srv
)
2760 /* random get one replication server to read */
2761 sock_index
= (int)(random() % c
->total_sfds
);
2765 /* random get one replication writing server to write */
2766 sock_index
= (int)(random() % ms_setting
.rep_write_srv
);
2769 else if (cmd
== CMD_GET
)
2771 /* random get one replication server to read */
2772 sock_index
= (int)(random() % c
->total_sfds
);
2775 while (c
->tcpsfd
[sock_index
] == 0);
2778 } /* ms_get_rep_sock_index */
2782 * get the next socket descriptor index to run
2784 * @param c, pointer of the concurrency
2786 * @return int, return the index
2788 static int ms_get_next_sock_index(ms_conn_t
*c
)
2794 sock_index
= (++c
->cur_idx
== c
->total_sfds
) ? 0 : c
->cur_idx
;
2796 while (c
->tcpsfd
[sock_index
] == 0);
2799 } /* ms_get_next_sock_index */
2803 * update socket event of the connections
2805 * @param c, pointer of the concurrency
2807 * @return int, if success, return 0, else return -1
2809 static int ms_update_conn_sock_event(ms_conn_t
*c
)
2813 switch (c
->currcmd
.cmd
)
2816 if (ms_setting
.facebook_test
&& c
->udp
)
2818 c
->sfd
= c
->tcpsfd
[0];
2820 c
->change_sfd
= true;
2825 if (ms_setting
.facebook_test
&& ! c
->udp
)
2829 c
->change_sfd
= true;
2837 if (! c
->udp
&& (c
->total_sfds
> 1))
2839 if (c
->cur_idx
!= c
->total_sfds
)
2841 if (ms_setting
.rep_write_srv
== 0)
2843 c
->cur_idx
= ms_get_next_sock_index(c
);
2847 c
->cur_idx
= ms_get_rep_sock_index(c
, c
->currcmd
.cmd
);
2852 /* must select the first sock of the connection at the beginning */
2856 c
->sfd
= c
->tcpsfd
[c
->cur_idx
];
2857 assert(c
->sfd
!= 0);
2858 c
->change_sfd
= true;
2863 if (! ms_update_event(c
, EV_WRITE
| EV_PERSIST
))
2865 fprintf(stderr
, "Couldn't update event.\n");
2866 ms_conn_set_state(c
, conn_closing
);
2872 } /* ms_update_conn_sock_event */
2876 * for ASCII protocol, this function build the set command
2877 * string and send the command.
2879 * @param c, pointer of the concurrency
2880 * @param item, pointer of task item which includes the object
2883 * @return int, if success, return 0, else return -1
2885 static int ms_build_ascii_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
)
2889 char *buffer
= c
->wbuf
;
2891 write_len
= sprintf(buffer
,
2897 if (write_len
> c
->wsize
)
2899 /* ought to be always enough. just fail for simplicity */
2900 fprintf(stderr
, "output command line too long.\n");
2904 if (item
->value_offset
== INVALID_OFFSET
)
2906 value_offset
= item
->key_suffix_offset
;
2910 value_offset
= item
->value_offset
;
2913 if ((ms_add_iov(c
, "set ", 4) != 0)
2914 || (ms_add_iov(c
, (char *)&item
->key_prefix
,
2915 (int)KEY_PREFIX_SIZE
) != 0)
2916 || (ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
2917 item
->key_size
- (int)KEY_PREFIX_SIZE
) != 0)
2918 || (ms_add_iov(c
, buffer
, write_len
) != 0)
2919 || (ms_add_iov(c
, &ms_setting
.char_block
[value_offset
],
2920 item
->value_size
) != 0)
2921 || (ms_add_iov(c
, "\r\n", 2) != 0)
2922 || (c
->udp
&& (ms_build_udp_headers(c
) != 0)))
2928 } /* ms_build_ascii_write_buf_set */
2932 * used to send set command to server
2934 * @param c, pointer of the concurrency
2935 * @param item, pointer of task item which includes the object
2938 * @return int, if success, return 0, else return -1
2940 int ms_mcd_set(ms_conn_t
*c
, ms_task_item_t
*item
)
2944 c
->currcmd
.cmd
= CMD_SET
;
2945 c
->currcmd
.isfinish
= false;
2946 c
->currcmd
.retstat
= MCD_FAILURE
;
2948 if (ms_update_conn_sock_event(c
) != 0)
2956 if (ms_add_msghdr(c
) != 0)
2958 fprintf(stderr
, "Out of memory preparing request.");
2962 /* binary protocol */
2963 if (c
->protocol
== binary_prot
)
2965 if (ms_build_bin_write_buf_set(c
, item
) != 0)
2972 if (ms_build_ascii_write_buf_set(c
, item
) != 0)
2978 __sync_fetch_and_add(&ms_stats
.obj_bytes
,
2979 item
->key_size
+ item
->value_size
);
2980 __sync_fetch_and_add(&ms_stats
.cmd_set
, 1);
2987 * for ASCII protocol, this function build the get command
2988 * string and send the command.
2990 * @param c, pointer of the concurrency
2991 * @param item, pointer of task item which includes the object
2994 * @return int, if success, return 0, else return -1
2996 static int ms_build_ascii_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
)
2998 if ((ms_add_iov(c
, "get ", 4) != 0)
2999 || (ms_add_iov(c
, (char *)&item
->key_prefix
,
3000 (int)KEY_PREFIX_SIZE
) != 0)
3001 || (ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
3002 item
->key_size
- (int)KEY_PREFIX_SIZE
) != 0)
3003 || (ms_add_iov(c
, "\r\n", 2) != 0)
3004 || (c
->udp
&& (ms_build_udp_headers(c
) != 0)))
3010 } /* ms_build_ascii_write_buf_get */
3014 * used to send the get command to server
3016 * @param c, pointer of the concurrency
3017 * @param item, pointer of task item which includes the object
3019 * @param verify, whether do verification
3021 * @return int, if success, return 0, else return -1
3023 int ms_mcd_get(ms_conn_t
*c
, ms_task_item_t
*item
, bool verify
)
3025 /* verify not supported yet */
3026 UNUSED_ARGUMENT(verify
);
3030 c
->currcmd
.cmd
= CMD_GET
;
3031 c
->currcmd
.isfinish
= false;
3032 c
->currcmd
.retstat
= MCD_FAILURE
;
3034 if (ms_update_conn_sock_event(c
) != 0)
3042 if (ms_add_msghdr(c
) != 0)
3044 fprintf(stderr
, "Out of memory preparing request.");
3048 /* binary protocol */
3049 if (c
->protocol
== binary_prot
)
3051 if (ms_build_bin_write_buf_get(c
, item
) != 0)
3058 if (ms_build_ascii_write_buf_get(c
, item
) != 0)
3064 __sync_fetch_and_add(&ms_stats
.cmd_get
, 1);
3071 * for ASCII protocol, this function build the multi-get command
3072 * string and send the command.
3074 * @param c, pointer of the concurrency
3076 * @return int, if success, return 0, else return -1
3078 static int ms_build_ascii_write_buf_mlget(ms_conn_t
*c
)
3080 ms_task_item_t
*item
;
3082 if (ms_add_iov(c
, "get", 3) != 0)
3087 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
3089 item
= c
->mlget_task
.mlget_item
[i
].item
;
3090 assert(item
!= NULL
);
3091 if ((ms_add_iov(c
, " ", 1) != 0)
3092 || (ms_add_iov(c
, (char *)&item
->key_prefix
,
3093 (int)KEY_PREFIX_SIZE
) != 0)
3094 || (ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
3095 item
->key_size
- (int)KEY_PREFIX_SIZE
) != 0))
3101 if ((ms_add_iov(c
, "\r\n", 2) != 0)
3102 || (c
->udp
&& (ms_build_udp_headers(c
) != 0)))
3108 } /* ms_build_ascii_write_buf_mlget */
3112 * used to send the multi-get command to server
3114 * @param c, pointer of the concurrency
3116 * @return int, if success, return 0, else return -1
3118 int ms_mcd_mlget(ms_conn_t
*c
)
3120 ms_task_item_t
*item
;
3123 assert(c
->mlget_task
.mlget_num
>= 1);
3125 c
->currcmd
.cmd
= CMD_GET
;
3126 c
->currcmd
.isfinish
= false;
3127 c
->currcmd
.retstat
= MCD_FAILURE
;
3129 if (ms_update_conn_sock_event(c
) != 0)
3137 if (ms_add_msghdr(c
) != 0)
3139 fprintf(stderr
, "Out of memory preparing request.");
3143 /* binary protocol */
3144 if (c
->protocol
== binary_prot
)
3146 if (ms_build_bin_write_buf_mlget(c
) != 0)
3153 if (ms_build_ascii_write_buf_mlget(c
) != 0)
3159 /* decrease operation time of each item */
3160 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
3162 item
= c
->mlget_task
.mlget_item
[i
].item
;
3163 __sync_fetch_and_add(&ms_stats
.cmd_get
, 1);
3167 } /* ms_mcd_mlget */
3171 * binary protocol support
3175 * for binary protocol, parse the response of server
3177 * @param c, pointer of the concurrency
3179 * @return int, if success, return 0, else return -1
3181 static int ms_bin_process_response(ms_conn_t
*c
)
3183 const char *errstr
= NULL
;
3187 uint32_t bodylen
= c
->binary_header
.response
.bodylen
;
3188 uint8_t opcode
= c
->binary_header
.response
.opcode
;
3189 uint16_t status
= c
->binary_header
.response
.status
;
3193 c
->rvbytes
= (int32_t)bodylen
;
3201 case PROTOCOL_BINARY_RESPONSE_SUCCESS
:
3202 if (opcode
== PROTOCOL_BINARY_CMD_SET
)
3204 c
->currcmd
.retstat
= MCD_STORED
;
3206 else if (opcode
== PROTOCOL_BINARY_CMD_DELETE
)
3208 c
->currcmd
.retstat
= MCD_DELETED
;
3210 else if (opcode
== PROTOCOL_BINARY_CMD_GET
)
3212 c
->currcmd
.retstat
= MCD_END
;
3216 case PROTOCOL_BINARY_RESPONSE_ENOMEM
:
3217 errstr
= "Out of memory";
3218 c
->currcmd
.retstat
= MCD_SERVER_ERROR
;
3221 case PROTOCOL_BINARY_RESPONSE_UNKNOWN_COMMAND
:
3222 errstr
= "Unknown command";
3223 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
3226 case PROTOCOL_BINARY_RESPONSE_KEY_ENOENT
:
3227 errstr
= "Not found";
3228 c
->currcmd
.retstat
= MCD_NOTFOUND
;
3231 case PROTOCOL_BINARY_RESPONSE_EINVAL
:
3232 errstr
= "Invalid arguments";
3233 c
->currcmd
.retstat
= MCD_PROTOCOL_ERROR
;
3236 case PROTOCOL_BINARY_RESPONSE_KEY_EEXISTS
:
3237 errstr
= "Data exists for key.";
3240 case PROTOCOL_BINARY_RESPONSE_E2BIG
:
3241 errstr
= "Too large.";
3242 c
->currcmd
.retstat
= MCD_SERVER_ERROR
;
3245 case PROTOCOL_BINARY_RESPONSE_NOT_STORED
:
3246 errstr
= "Not stored.";
3247 c
->currcmd
.retstat
= MCD_NOTSTORED
;
3251 errstr
= "Unknown error";
3252 c
->currcmd
.retstat
= MCD_UNKNOWN_READ_FAILURE
;
3258 fprintf(stderr
, "%s\n", errstr
);
3263 } /* ms_bin_process_response */
3266 /* build binary header and add the header to the buffer to send */
3269 * build binary header and add the header to the buffer to send
3271 * @param c, pointer of the concurrency
3272 * @param opcode, operation code
3273 * @param hdr_len, length of header
3274 * @param key_len, length of key
3275 * @param body_len. length of body
3277 static void ms_add_bin_header(ms_conn_t
*c
,
3283 protocol_binary_request_header
*header
;
3287 header
= (protocol_binary_request_header
*)c
->wcurr
;
3289 header
->request
.magic
= (uint8_t)PROTOCOL_BINARY_REQ
;
3290 header
->request
.opcode
= (uint8_t)opcode
;
3291 header
->request
.keylen
= htonl(key_len
);
3293 header
->request
.extlen
= (uint8_t)hdr_len
;
3294 header
->request
.datatype
= (uint8_t)PROTOCOL_BINARY_RAW_BYTES
;
3295 header
->request
.reserved
= 0;
3297 header
->request
.bodylen
= htonl(body_len
);
3298 header
->request
.opaque
= 0;
3299 header
->request
.cas
= 0;
3301 ms_add_iov(c
, c
->wcurr
, sizeof(header
->request
));
3302 } /* ms_add_bin_header */
3306 * add the key to the socket write buffer array
3308 * @param c, pointer of the concurrency
3309 * @param item, pointer of task item which includes the object
3312 static void ms_add_key_to_iov(ms_conn_t
*c
, ms_task_item_t
*item
)
3314 ms_add_iov(c
, (char *)&item
->key_prefix
, (int)KEY_PREFIX_SIZE
);
3315 ms_add_iov(c
, &ms_setting
.char_block
[item
->key_suffix_offset
],
3316 item
->key_size
- (int)KEY_PREFIX_SIZE
);
3321 * for binary protocol, this function build the set command
3322 * and add the command to send buffer array.
3324 * @param c, pointer of the concurrency
3325 * @param item, pointer of task item which includes the object
3328 * @return int, if success, return 0, else return -1
3330 static int ms_build_bin_write_buf_set(ms_conn_t
*c
, ms_task_item_t
*item
)
3332 assert(c
->wbuf
== c
->wcurr
);
3335 protocol_binary_request_set
*rep
= (protocol_binary_request_set
*)c
->wcurr
;
3336 uint16_t keylen
= (uint16_t)item
->key_size
;
3337 uint32_t bodylen
= (uint32_t)sizeof(rep
->message
.body
)
3338 + (uint32_t)keylen
+ (uint32_t)item
->value_size
;
3340 ms_add_bin_header(c
,
3341 PROTOCOL_BINARY_CMD_SET
,
3342 sizeof(rep
->message
.body
),
3345 rep
->message
.body
.flags
= 0;
3346 rep
->message
.body
.expiration
= htonl((uint32_t)item
->exp_time
);
3347 ms_add_iov(c
, &rep
->message
.body
, sizeof(rep
->message
.body
));
3348 ms_add_key_to_iov(c
, item
);
3350 if (item
->value_offset
== INVALID_OFFSET
)
3352 value_offset
= item
->key_suffix_offset
;
3356 value_offset
= item
->value_offset
;
3358 ms_add_iov(c
, &ms_setting
.char_block
[value_offset
], item
->value_size
);
3361 } /* ms_build_bin_write_buf_set */
3365 * for binary protocol, this function build the get command and
3366 * add the command to send buffer array.
3368 * @param c, pointer of the concurrency
3369 * @param item, pointer of task item which includes the object
3372 * @return int, if success, return 0, else return -1
3374 static int ms_build_bin_write_buf_get(ms_conn_t
*c
, ms_task_item_t
*item
)
3376 assert(c
->wbuf
== c
->wcurr
);
3378 ms_add_bin_header(c
, PROTOCOL_BINARY_CMD_GET
, 0, (uint16_t)item
->key_size
,
3379 (uint32_t)item
->key_size
);
3380 ms_add_key_to_iov(c
, item
);
3383 } /* ms_build_bin_write_buf_get */
3387 * for binary protocol, this function build the multi-get
3388 * command and add the command to send buffer array.
3390 * @param c, pointer of the concurrency
3391 * @param item, pointer of task item which includes the object
3394 * @return int, if success, return 0, else return -1
3396 static int ms_build_bin_write_buf_mlget(ms_conn_t
*c
)
3398 ms_task_item_t
*item
;
3400 assert(c
->wbuf
== c
->wcurr
);
3402 for (int i
= 0; i
< c
->mlget_task
.mlget_num
; i
++)
3404 item
= c
->mlget_task
.mlget_item
[i
].item
;
3405 assert(item
!= NULL
);
3407 ms_add_bin_header(c
,
3408 PROTOCOL_BINARY_CMD_GET
,
3410 (uint16_t)item
->key_size
,
3411 (uint32_t)item
->key_size
);
3412 ms_add_key_to_iov(c
, item
);
3413 c
->wcurr
+= sizeof(protocol_binary_request_get
);
3419 } /* ms_build_bin_write_buf_mlget */