server: exit gracefully on ctrl-c
[fio.git] / client.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <unistd.h>
4 #include <limits.h>
5 #include <errno.h>
6 #include <fcntl.h>
7 #include <sys/poll.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <sys/wait.h>
11 #include <sys/mman.h>
12 #include <netinet/in.h>
13 #include <arpa/inet.h>
14 #include <netdb.h>
15
16 #include "fio.h"
17 #include "server.h"
18 #include "crc/crc32.h"
19 #include "flist.h"
20
21 struct fio_client {
22         struct flist_head list;
23         struct sockaddr_in addr;
24         char *hostname;
25         int fd;
26 };
27
28 static FLIST_HEAD(client_list);
29
30 static struct fio_client *find_client_by_fd(int fd)
31 {
32         struct fio_client *client;
33         struct flist_head *entry;
34
35         flist_for_each(entry, &client_list) {
36                 client = flist_entry(entry, struct fio_client, list);
37
38                 if (client->fd == fd)
39                         return client;
40         }
41
42         return NULL;
43 }
44
45 #if 0
46 static struct fio_client *find_client_by_name(const char *name)
47 {
48         struct fio_client *client;
49         struct flist_head *entry;
50
51         flist_for_each(entry, &client_list) {
52                 client = flist_entry(entry, struct fio_client, list);
53
54                 if (!strcmp(name, client->hostname))
55                         return client;
56         }
57
58         return NULL;
59 }
60 #endif
61
62 static void remove_client(struct fio_client *client)
63 {
64         printf("remove client %s\n", client->hostname);
65         flist_del(&client->list);
66         nr_clients--;
67         free(client->hostname);
68         free(client);
69 }
70
71 void fio_client_add(const char *hostname)
72 {
73         struct fio_client *client;
74
75         client = malloc(sizeof(*client));
76         memset(client, 0, sizeof(*client));
77         client->hostname = strdup(hostname);
78         client->fd = -1;
79         flist_add(&client->list, &client_list);
80         nr_clients++;
81 }
82
83 static int fio_client_connect(struct fio_client *client)
84 {
85         int fd;
86
87         memset(&client->addr, 0, sizeof(client->addr));
88         client->addr.sin_family = AF_INET;
89         client->addr.sin_port = htons(fio_net_port);
90
91         if (inet_aton(client->hostname, &client->addr.sin_addr) != 1) {
92                 struct hostent *hent;
93
94                 hent = gethostbyname(client->hostname);
95                 if (!hent) {
96                         log_err("fio: gethostbyname: %s\n", strerror(errno));
97                         return 1;
98                 }
99
100                 memcpy(&client->addr.sin_addr, hent->h_addr, 4);
101         }
102
103         fd = socket(AF_INET, SOCK_STREAM, 0);
104         if (fd < 0) {
105                 log_err("fio: socket: %s\n", strerror(errno));
106                 free(client);
107                 return 1;
108         }
109
110         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
111                 log_err("fio: connect: %s\n", strerror(errno));
112                 free(client);
113                 return 1;
114         }
115
116         client->fd = fd;
117         return 0;
118 }
119
120 int fio_clients_connect(void)
121 {
122         struct fio_client *client;
123         struct flist_head *entry, *tmp;
124         int ret;
125
126         flist_for_each_safe(entry, tmp, &client_list) {
127                 client = flist_entry(entry, struct fio_client, list);
128
129                 ret = fio_client_connect(client);
130                 if (ret)
131                         remove_client(client);
132         }
133
134         return !nr_clients;
135 }
136
137 static int send_file_buf(struct fio_client *client, char *buf, off_t size)
138 {
139         return fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, size);
140 }
141
142 /*
143  * Send file contents to server backend. We could use sendfile(), but to remain
144  * more portable lets just read/write the darn thing.
145  */
146 static int fio_client_send_ini(struct fio_client *client, const char *filename)
147 {
148         struct stat sb;
149         char *p, *buf;
150         off_t len;
151         int fd, ret;
152
153         fd = open(filename, O_RDONLY);
154         if (fd < 0) {
155                 log_err("fio: job file open: %s\n", strerror(errno));
156                 return 1;
157         }
158
159         if (fstat(fd, &sb) < 0) {
160                 log_err("fio: job file stat: %s\n", strerror(errno));
161                 return 1;
162         }
163
164         buf = malloc(sb.st_size);
165
166         len = sb.st_size;
167         p = buf;
168         do {
169                 ret = read(fd, p, len);
170                 if (ret > 0) {
171                         len -= ret;
172                         if (!len)
173                                 break;
174                         p += ret;
175                         continue;
176                 } else if (!ret)
177                         break;
178                 else if (errno == EAGAIN || errno == EINTR)
179                         continue;
180         } while (1);
181
182         ret = send_file_buf(client, buf, sb.st_size);
183         free(buf);
184         return ret;
185 }
186
187 int fio_clients_send_ini(const char *filename)
188 {
189         struct fio_client *client;
190         struct flist_head *entry, *tmp;
191
192         flist_for_each_safe(entry, tmp, &client_list) {
193                 client = flist_entry(entry, struct fio_client, list);
194
195                 if (fio_client_send_ini(client, filename))
196                         remove_client(client);
197         }
198
199         return !nr_clients;
200 }
201
202 static int handle_client(struct fio_client *client)
203 {
204         struct fio_net_cmd *cmd;
205
206         while ((cmd = fio_net_cmd_read(client->fd)) != NULL) {
207                 if (cmd->opcode == FIO_NET_CMD_ACK) {
208                         free(cmd);
209                         continue;
210                 }
211                 if (cmd->opcode == FIO_NET_CMD_QUIT) {
212                         remove_client(client);
213                         free(cmd);
214                         break;
215                 }
216                 if (cmd->opcode != FIO_NET_CMD_TEXT) {
217                         printf("non text: %d\n", cmd->opcode);
218                         free(cmd);
219                         continue;
220                 }
221                 fwrite(cmd->payload, cmd->pdu_len, 1, stdout);
222                 fflush(stdout);
223                 free(cmd);
224         }
225
226         return 0;
227 }
228
229 int fio_handle_clients(void)
230 {
231         struct fio_client *client;
232         struct flist_head *entry;
233         struct pollfd *pfds;
234         int i = 0, ret = 0;
235
236         pfds = malloc(nr_clients * sizeof(struct pollfd));
237
238         flist_for_each(entry, &client_list) {
239                 client = flist_entry(entry, struct fio_client, list);
240
241                 pfds[i].fd = client->fd;
242                 pfds[i].events = POLLIN;
243                 i++;
244         }
245
246         while (!exit_backend && nr_clients) {
247                 ret = poll(pfds, nr_clients, 100);
248                 if (ret < 0) {
249                         if (errno == EINTR)
250                                 continue;
251                         log_err("fio: poll clients: %s\n", strerror(errno));
252                         break;
253                 } else if (!ret)
254                         continue;
255
256                 for (i = 0; i < nr_clients; i++) {
257                         if (!(pfds[i].revents & POLLIN))
258                                 continue;
259
260                         client = find_client_by_fd(pfds[i].fd);
261                         if (!client) {
262                                 log_err("fio: unknown client\n");
263                                 continue;
264                         }
265                         handle_client(client);
266                 }
267         }
268
269         free(pfds);
270
271         return 0;
272 }