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d4a1283e JD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
1ce86c9a JD |
19 | #ifndef _LIBLTTKCONSUMERD_H |
20 | #define _LIBLTTKCONSUMERD_H | |
d4a1283e | 21 | |
5dc18550 | 22 | #include "lttng-kconsumerd.h" |
1ce86c9a | 23 | #include "liblttsessiondcomm.h" |
5dc18550 | 24 | |
1ce86c9a JD |
25 | /* |
26 | * When the receiving thread dies, we need to have a way to make | |
27 | * the polling thread exit eventually. | |
28 | * If all FDs hang up (normal case when the ltt-sessiond stops), | |
29 | * we can exit cleanly, but if there is a problem and for whatever | |
30 | * reason some FDs remain open, the consumer should still exit eventually. | |
31 | * | |
32 | * If the timeout is reached, it means that during this period | |
33 | * no events occurred on the FDs so we need to force an exit. | |
34 | * This case should not happen but it is a safety to ensure we won't block | |
35 | * the consumer indefinitely. | |
36 | * | |
37 | * The value of 2 seconds is an arbitrary choice. | |
38 | */ | |
39 | #define KCONSUMERD_POLL_GRACE_PERIOD 2000 | |
40 | ||
41 | struct kconsumerd_fd_list { | |
d4a1283e JD |
42 | struct cds_list_head head; |
43 | }; | |
44 | ||
45 | /* | |
46 | * Internal representation of the FDs, | |
47 | * sessiond_fd is used to identify uniquely a fd | |
48 | */ | |
1ce86c9a | 49 | struct kconsumerd_fd { |
d4a1283e JD |
50 | struct cds_list_head list; |
51 | int sessiond_fd; /* used to identify uniquely a fd with sessiond */ | |
52 | int consumerd_fd; /* fd to consume */ | |
53 | int out_fd; /* output file to write the data */ | |
54 | off_t out_fd_offset; /* write position in the output file descriptor */ | |
55 | char path_name[PATH_MAX]; /* tracefile name */ | |
5dc18550 | 56 | enum kconsumerd_fd_state state; |
d4a1283e JD |
57 | unsigned long max_sb_size; /* the subbuffer size for this channel */ |
58 | }; | |
59 | ||
1ce86c9a JD |
60 | int kconsumerd_create_poll_pipe(); |
61 | int kconsumerd_send_error(enum lttcomm_return_code cmd); | |
62 | void *kconsumerd_thread_poll_fds(void *data); | |
63 | void *kconsumerd_thread_receive_fds(void *data); | |
64 | void kconsumerd_cleanup(); | |
65 | void kconsumerd_set_error_socket(int sock); | |
66 | void kconsumerd_set_command_socket_path(char *sock); | |
67 | ||
68 | #endif /* _LIBLTTKCONSUMERD_H */ |