source3/lib/server_prefork.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Common server globals
   4
   5    Copyright (C) Simo Sorce <idra@samba.org> 2011
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "system/network.h"
  22 #include <tevent.h>
  23
  24 enum pf_worker_status {
  25         PF_WORKER_NONE = 0,
  26         PF_WORKER_IDLE,
  27         PF_WORKER_ACCEPTING,
  28         PF_WORKER_BUSY,
  29         PF_WORKER_EXITING
  30 };
  31
  32 enum pf_server_cmds {
  33         PF_SRV_MSG_NONE = 0,
  34         PF_SRV_MSG_EXIT
  35 };
  36
  37 struct pf_worker_data {
  38         pid_t pid;
  39         enum pf_worker_status status;
  40         time_t started;
  41         time_t last_used;
  42         int num_clients;
  43
  44         enum pf_server_cmds cmds;
  45         int allowed_clients;
  46 };
  47
  48 typedef int (prefork_main_fn_t)(struct tevent_context *ev,
  49                                 struct pf_worker_data *pf,
  50                                 int listen_fd,
  51                                 int lock_fd,
  52                                 void *private_data);
  53
  54 struct prefork_pool;
  55
  56
  57 /* ==== Functions used by controlling process ==== */
  58
  59 bool prefork_create_pool(struct tevent_context *ev_ctx,
  60                          TALLOC_CTX *mem_ctx, int listen_fd,
  61                          int min_children, int max_children,
  62                          prefork_main_fn_t *main_fn, void *private_data,
  63                          struct prefork_pool **pf_pool);
  64 int prefork_expand_pool(struct prefork_pool *pfp, int new_max);
  65
  66 int prefork_add_children(struct tevent_context *ev_ctx,
  67                          struct prefork_pool *pfp,
  68                          int num_children);
  69 int prefork_retire_children(struct prefork_pool *pfp,
  70                             int num_children, time_t age_limit);
  71 int prefork_count_active_children(struct prefork_pool *pfp, int *total);
  72 bool prefork_mark_pid_dead(struct prefork_pool *pfp, pid_t pid);
  73 void prefork_increase_allowed_clients(struct prefork_pool *pfp, int max);
  74 void prefork_reset_allowed_clients(struct prefork_pool *pfp);
  75
  76 /* ==== Functions used by children ==== */
  77
  78 int prefork_wait_for_client(struct pf_worker_data *pf,
  79                             int lock_fd, int listen_fd,
  80                             struct sockaddr *addr,
  81                             socklen_t *addrlen, int *fd);
  82
  83 struct tevent_req *prefork_listen_send(TALLOC_CTX *mem_ctx,
  84                                         struct tevent_context *ev,
  85                                         struct pf_worker_data *pf,
  86                                         int lock_fd, int listen_fd,
  87                                         struct sockaddr *addr,
  88                                         socklen_t *addrlen);
  89 int prefork_listen_recv(struct tevent_req *req, int *fd);