file_server/file_server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    run s3 file server within Samba4
   5
   6    Copyright (C) Andrew Tridgell        2011
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "talloc.h"
  24 #include "tevent.h"
  25 #include "system/filesys.h"
  26 #include "lib/param/param.h"
  27 #include "source4/smbd/service.h"
  28 #include "source4/smbd/process_model.h"
  29 #include "file_server/file_server.h"
  30 #include "dynconfig.h"
  31
  32 /*
  33   generate a smbd config file for the file server
  34  */
  35 static const char *generate_smb_conf(struct task_server *task)
  36 {
  37         int fd;
  38         struct loadparm_context *lp_ctx = task->lp_ctx;
  39         const char *path = smbd_tmp_path(task, lp_ctx, "fileserver.conf");
  40
  41         if (path == NULL) {
  42                 return NULL;
  43         }
  44
  45         fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, 0644);
  46         if (fd == -1) {
  47                 DEBUG(0,("Failed to create %s", path));
  48                 return NULL;
  49         }
  50
  51         fdprintf(fd, "# auto-generated config for fileserver\n");
  52         fdprintf(fd, "auth methods = guest samba4\n");
  53         fdprintf(fd, "passdb backend = samba4\n");
  54         fdprintf(fd, "rpc_server:default = external\n");
  55         fdprintf(fd, "rpc_server:dssetup = disabled\n");
  56         fdprintf(fd, "rpc_server:spoolss = embedded\n");
  57         fdprintf(fd, "rpc_daemon:spoolssd = disabled\n");
  58         fdprintf(fd, "rpc_server:tcpip = no\n");
  59
  60         /* If we are using xattr_tdb:file or posix:eadb then we need to load another VFS object */
  61         if (lpcfg_parm_string(lp_ctx, NULL, "xattr_tdb", "file")) {
  62                 fdprintf(fd, "vfs objects = acl_xattr xattr_tdb\n");
  63         } else if (lpcfg_parm_string(lp_ctx, NULL, "posix", "eadb")) {
  64                 fdprintf(fd, "vfs objects = acl_xattr posix_eadb\n");
  65         } else {
  66                 fdprintf(fd, "vfs objects = acl_xattr\n");
  67         }
  68
  69         fdprintf(fd, "include = %s\n", lpcfg_configfile(lp_ctx));
  70
  71         fdprintf(fd, "[IPC$]\n");
  72         fdprintf(fd, " vfs objects = dfs_samba4\n");
  73
  74         close(fd);
  75         return path;
  76 }
  77
  78 /*
  79   called if smbd exits
  80  */
  81 static void file_server_smbd_done(struct tevent_req *subreq)
  82 {
  83         int sys_errno;
  84         int ret;
  85
  86         ret = samba_runcmd_recv(subreq, &sys_errno);
  87         if (ret != 0) {
  88                 DEBUG(0,("file_server smbd daemon died with exit status %d\n", sys_errno));
  89         } else {
  90                 DEBUG(0,("file_server smbd daemon exited normally\n"));
  91         }
  92 }
  93
  94
  95 /*
  96   startup a copy of smbd as a child daemon
  97 */
  98 static void s3fs_task_init(struct task_server *task)
  99 {
 100         const char *fileserver_conf;
 101         struct tevent_req *req;
 102         const char *smbd_path;
 103         const char *smbd_cmd[2] = { NULL, NULL };
 104
 105         task_server_set_title(task, "task[s3fs_parent]");
 106
 107         /* create a smb.conf for smbd to use */
 108         fileserver_conf = generate_smb_conf(task);
 109
 110         smbd_path = talloc_asprintf(task, "%s/smbd", dyn_SBINDIR);
 111         smbd_cmd[0] = smbd_path;
 112
 113         /* start it as a child process */
 114         req = samba_runcmd_send(task, task->event_ctx, timeval_zero(), 1, 0,
 115                                 smbd_cmd,
 116                                 "--configfile", fileserver_conf,
 117                                 "--foreground",
 118                                 debug_get_output_is_stdout()?"--log-stdout":NULL,
 119                                 NULL);
 120         if (req == NULL) {
 121                 DEBUG(0, ("Failed to start smbd as child daemon\n"));
 122                 goto failed;
 123         }
 124
 125         tevent_req_set_callback(req, file_server_smbd_done, task);
 126
 127         DEBUG(1,("Started file server smbd with config %s\n", fileserver_conf));
 128         return;
 129 failed:
 130         task_server_terminate(task, "Failed to startup s3fs smb task", true);
 131 }
 132
 133 /* called at smbd startup - register ourselves as a server service */
 134 NTSTATUS server_service_s3fs_init(void);
 135
 136 NTSTATUS server_service_s3fs_init(void)
 137 {
 138         return register_server_service("s3fs", s3fs_task_init);
 139 }