kconsumerd/kconsumerd.h

   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
  19 #ifndef _LTT_KCONSUMERD_H
  20 #define _LTT_KCONSUMERD_H
  21
  22 /* timeout of 1s on poll to ensure the fd list is updated when needed */
  23 #define POLL_TIMEOUT 1000
  24
  25 struct ltt_kconsumerd_fd_list {
  26         struct cds_list_head head;
  27 };
  28
  29 /*
  30  * Internal representation of the FDs,
  31  * sessiond_fd is used to identify uniquely a fd
  32  */
  33 struct ltt_kconsumerd_fd {
  34         struct cds_list_head list;
  35         int sessiond_fd; /* used to identify uniquely a fd with sessiond */
  36         int consumerd_fd; /* fd to consume */
  37         int out_fd; /* output file to write the data */
  38         off_t out_fd_offset; /* write position in the output file descriptor */
  39         char path_name[PATH_MAX]; /* tracefile name */
  40         enum lttcomm_kconsumerd_fd_state state;
  41         unsigned long max_sb_size; /* the subbuffer size for this channel */
  42 };
  43
  44 #endif /* _LTT_KCONSUMERD_H */