]> arthur.barton.de Git - netatalk.git/blobdiff - etc/afpd/afp_dsi.c
1) try a better workaround for deadlocks when both the server and the client are...
[netatalk.git] / etc / afpd / afp_dsi.c
index 7c856d47dc155d01e186bf0f79e959bd4fc353d1..3a73159aed1bf8c3ad08786f60ac42f9844ef566 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * $Id: afp_dsi.c,v 1.41 2009-10-21 07:03:08 didg Exp $
+ * $Id: afp_dsi.c,v 1.46 2009-10-25 06:12:51 didg Exp $
  *
  * Copyright (c) 1999 Adrian Sun (asun@zoology.washington.edu)
  * Copyright (c) 1990,1993 Regents of The University of Michigan.
@@ -59,6 +59,7 @@ static void afp_dsi_close(AFPObj *obj)
 {
     DSI *dsi = obj->handle;
 
+    /* XXX we have to check we are not root here */
     close_all_vol();
     if (obj->logout)
         (*obj->logout)();
@@ -115,8 +116,11 @@ static void afp_dsi_timedown(int sig _U_)
     child.flags |= CHILD_DIE;
     /* shutdown and don't reconnect. server going down in 5 minutes. */
     setmessage("The server is going down for maintenance.");
-    dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
-                  AFPATTN_MESG | AFPATTN_TIME(5));
+    if (dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+                  AFPATTN_MESG | AFPATTN_TIME(5)) < 0) {
+        DSI *dsi = (DSI *) child.obj->handle;
+        dsi->down_request = 1;
+    }                  
 
     it.it_interval.tv_sec = 0;
     it.it_interval.tv_usec = 0;
@@ -146,7 +150,6 @@ static void afp_dsi_timedown(int sig _U_)
         LOG(log_error, logtype_afpd, "afp_timedown: sigaction SIGHUP: %s", strerror(errno) );
         afp_dsi_die(EXITERR_SYS);
     }
-
 }
 
 /* ---------------------------------
@@ -164,8 +167,11 @@ static void afp_dsi_reload(int sig _U_)
 #ifdef SERVERTEXT
 static void afp_dsi_getmesg (int sig _U_)
 {
-    readmessage(child.obj);
-    dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+    DSI *dsi = (DSI *) child.obj->handle;
+
+    dsi->msg_request = 1;
+    if (dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5)) < 0)
+        dsi->msg_request = 2;
 }
 #endif /* SERVERTEXT */
 
@@ -203,23 +209,29 @@ static void alarm_handler(int sig _U_)
     }
 }
 
-
-#ifdef DEBUG1
-/*  ---------------------------------
- *  old signal handler for SIGUSR1 - set the debug flag and 
- *  redirect stdout to <tmpdir>/afpd-debug-<pid>.
- */
-void afp_set_debug (int sig)
+/* ----------------- 
+   if dsi->in_write is set attention, tickle (and close?) msg
+   aren't sent. We don't care about tickle 
+*/
+static void pending_request(DSI *dsi)
 {
-    char       fname[MAXPATHLEN];
-
-    snprintf(fname, MAXPATHLEN-1, "%safpd-debug-%d", P_tmpdir, getpid());
-    freopen(fname, "w", stdout);
-    child.obj->options.flags |= OPTION_DEBUG;
+    /* send pending attention */
 
-    return;
+    /* read msg if any, it could be done in afp_getsrvrmesg */
+    if (dsi->msg_request) {
+        if (dsi->msg_request == 2) {
+            /* didn't send it in signal handler */
+            dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+        }
+        dsi->msg_request = 0;
+        readmessage(child.obj);
+    }
+    if (dsi->down_request) {
+        dsi->down_request = 0;
+        dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+                  AFPATTN_MESG | AFPATTN_TIME(5));
+    }
 }
-#endif
 
 /* -------------------------------------------
  afp over dsi. this never returns. 
@@ -319,10 +331,6 @@ void afp_over_dsi(AFPObj *obj)
     }
 #endif /* DEBUGGING */
 
-#ifdef DEBUG1
-    fault_setup((void (*)(void *))afp_dsi_die);
-#endif
-
     /* get stuck here until the end */
     while ((cmd = dsi_receive(dsi))) {
         child.tickle = 0;
@@ -337,17 +345,15 @@ void afp_over_dsi(AFPObj *obj)
             /* timer is not every 30 seconds anymore, so we don't get killed on the client side. */
             if ((child.flags & CHILD_DIE))
                 dsi_tickle(dsi);
+            pending_request(dsi);
             continue;
         } 
+
         child.flags |= CHILD_DATA;
         switch(cmd) {
         case DSIFUNC_CLOSE:
             afp_dsi_close(obj);
             LOG(log_info, logtype_afpd, "done");
-#ifdef DEBUG1
-            if (obj->options.flags & OPTION_DEBUG )
-                printf("done\n");
-#endif                
             return;
             break;
 
@@ -362,12 +368,6 @@ void afp_over_dsi(AFPObj *obj)
 #endif /* AFS */
 
             function = (u_char) dsi->commands[0];
-#ifdef DEBUG1
-            if (obj->options.flags & OPTION_DEBUG ) {
-                printf("command: %d (%s)\n", function, AfpNum2name(function));
-                bprint((char *) dsi->commands, dsi->cmdlen);
-            }
-#endif            
 
             /* send off an afp command. in a couple cases, we take advantage
              * of the fact that we're a stream-based protocol. */
@@ -379,8 +379,8 @@ void afp_over_dsi(AFPObj *obj)
                 LOG(log_debug, logtype_afpd, "=> Start AFP command: %s", afpcmpstr);
 
                 err = (*afp_switch[function])(obj,
-                                              dsi->commands, dsi->cmdlen,
-                                              dsi->data, &dsi->datalen);
+                                              (char *)&dsi->commands, dsi->cmdlen,
+                                              (char *)&dsi->data, &dsi->datalen);
 
                 LOG(log_debug, logtype_afpd, "=> Finished AFP command: %s", afpcmpstr);
 #ifdef FORCE_UIDGID
@@ -401,12 +401,6 @@ void afp_over_dsi(AFPObj *obj)
                 break;
             }
 
-#ifdef DEBUG1
-            if (obj->options.flags & OPTION_DEBUG ) {
-                printf( "reply: %d, %d\n", err, dsi->clientID);
-                bprint((char *) dsi->data, dsi->datalen);
-            }
-#endif
             if (!dsi_cmdreply(dsi, err)) {
                 LOG(log_error, logtype_afpd, "dsi_cmdreply(%d): %s", dsi->socket, strerror(errno) );
                 afp_dsi_die(EXITERR_CLNT);
@@ -415,17 +409,12 @@ void afp_over_dsi(AFPObj *obj)
 
         case DSIFUNC_WRITE: /* FPWrite and FPAddIcon */
             function = (u_char) dsi->commands[0];
-#ifdef DEBUG1
-            if ( obj->options.flags & OPTION_DEBUG ) {
-                printf("(write) command: %d, %d\n", function, dsi->cmdlen);
-                bprint((char *) dsi->commands, dsi->cmdlen);
-            }
-#endif
             if ( afp_switch[ function ] != NULL ) {
                 dsi->datalen = DSI_DATASIZ;
                 child.flags |= CHILD_RUNNING;
-                err = (*afp_switch[function])(obj, dsi->commands, dsi->cmdlen,
-                                              dsi->data, &dsi->datalen);
+                err = (*afp_switch[function])(obj,
+                                              (char *)&dsi->commands, dsi->cmdlen,
+                                              (char *)&dsi->data, &dsi->datalen);
                 child.flags &= ~CHILD_RUNNING;
 #ifdef FORCE_UIDGID
                /* bring everything back to old euid, egid */
@@ -438,12 +427,6 @@ void afp_over_dsi(AFPObj *obj)
                 err = AFPERR_NOOP;
             }
 
-#ifdef DEBUG1
-            if (obj->options.flags & OPTION_DEBUG ) {
-                printf( "(write) reply code: %d, %d\n", err, dsi->clientID);
-                bprint((char *) dsi->data, dsi->datalen);
-            }
-#endif
             if (!dsi_wrtreply(dsi, err)) {
                 LOG(log_error, logtype_afpd, "dsi_wrtreply: %s", strerror(errno) );
                 afp_dsi_die(EXITERR_CLNT);
@@ -451,7 +434,6 @@ void afp_over_dsi(AFPObj *obj)
             break;
 
         case DSIFUNC_ATTN: /* attention replies */
-            continue;
             break;
 
             /* error. this usually implies a mismatch of some kind
@@ -463,15 +445,7 @@ void afp_over_dsi(AFPObj *obj)
             dsi_writeflush(dsi);
             break;
         }
-#ifdef DEBUG1
-        if ( obj->options.flags & OPTION_DEBUG ) {
-#ifdef notdef
-            pdesc( stdout );
-#endif /* notdef */
-            of_pforkdesc( stdout );
-            fflush( stdout );
-        }
-#endif
+        pending_request(dsi);
     }
 
     /* error */