1/* 2 Unix SMB/CIFS implementation. 3 4 process model: process (1 process handles all client connections) 5 6 Copyright (C) Andrew Tridgell 2003 7 Copyright (C) James J Myers 2003 <myersjj@samba.org> 8 Copyright (C) Stefan (metze) Metzmacher 2004 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program. If not, see <http://www.gnu.org/licenses/>. 22*/ 23 24#include "includes.h" 25#include "smbd/process_model.h" 26#include "system/filesys.h" 27#include "cluster/cluster.h" 28 29/* 30 called when the process model is selected 31*/ 32static void single_model_init(struct tevent_context *ev) 33{ 34} 35 36/* 37 called when a listening socket becomes readable. 38*/ 39static void single_accept_connection(struct tevent_context *ev, 40 struct loadparm_context *lp_ctx, 41 struct socket_context *listen_socket, 42 void (*new_conn)(struct tevent_context *, 43 struct loadparm_context *, 44 struct socket_context *, 45 struct server_id , void *), 46 void *private_data) 47{ 48 NTSTATUS status; 49 struct socket_context *connected_socket; 50 51 /* accept an incoming connection. */ 52 status = socket_accept(listen_socket, &connected_socket); 53 if (!NT_STATUS_IS_OK(status)) { 54 DEBUG(0,("single_accept_connection: accept: %s\n", nt_errstr(status))); 55 /* this looks strange, but is correct. 56 57 We can only be here if woken up from select, due to 58 an incomming connection. 59 60 We need to throttle things until the system clears 61 enough resources to handle this new socket. 62 63 If we don't then we will spin filling the log and 64 causing more problems. We don't panic as this is 65 probably a temporary resource constraint */ 66 sleep(1); 67 return; 68 } 69 70 talloc_steal(private_data, connected_socket); 71 72 /* The cluster_id(0, fd) cannot collide with the incrementing 73 * task below, as the first component is 0, not 1 */ 74 new_conn(ev, lp_ctx, connected_socket, 75 cluster_id(0, socket_get_fd(connected_socket)), private_data); 76} 77 78/* 79 called to startup a new task 80*/ 81static void single_new_task(struct tevent_context *ev, 82 struct loadparm_context *lp_ctx, 83 const char *service_name, 84 void (*new_task)(struct tevent_context *, struct loadparm_context *, struct server_id, void *), 85 void *private_data) 86{ 87 /* start our taskids at 1, zero is reserved for the top 88 level samba task */ 89 static uint32_t taskid = 1; 90 91 /* We use 1 so we cannot collide in with cluster ids generated 92 * in the accept connection above, and unlikly to collide with 93 * PIDs from process modal standard (don't run samba as 94 * init) */ 95 new_task(ev, lp_ctx, cluster_id(1, taskid++), private_data); 96} 97 98 99/* called when a task goes down */ 100static void single_terminate(struct tevent_context *ev, struct loadparm_context *lp_ctx, const char *reason) 101{ 102 DEBUG(2,("single_terminate: reason[%s]\n",reason)); 103} 104 105/* called to set a title of a task or connection */ 106static void single_set_title(struct tevent_context *ev, const char *title) 107{ 108} 109 110const struct model_ops single_ops = { 111 .name = "single", 112 .model_init = single_model_init, 113 .new_task = single_new_task, 114 .accept_connection = single_accept_connection, 115 .terminate = single_terminate, 116 .set_title = single_set_title, 117}; 118 119/* 120 initialise the single process model, registering ourselves with the 121 process model subsystem 122 */ 123NTSTATUS process_model_single_init(void) 124{ 125 return register_process_model(&single_ops); 126} 127