First working IPC reconnect

[netatalk.git] / etc / afpd / afp_dsi.c

diff --git a/etc/afpd/afp_dsi.c b/etc/afpd/afp_dsi.c
index e8bbc0174fad5551ed4a1a8843e31e78bab15b02..cb1eb19f75d8d849a5153955fb745c3de82de91e 100644 (file)
--- a/etc/afpd/afp_dsi.c
+++ b/etc/afpd/afp_dsi.c
@@ -35,7 +35,7 @@
 #include <atalk/paths.h>
 #include <atalk/server_ipc.h>
 
-#include "globals.h"
+#include <atalk/globals.h>
 #include "switch.h"
 #include "auth.h"
 #include "fork.h"
@@ -132,6 +132,28 @@ static void afp_dsi_die(int sig)
     }
 }
 
+/* SIGQUIT handler */
+static void ipc_reconnect_handler(int sig _U_)
+{
+    DSI *dsi = (DSI *)AFPobj->handle;
+
+    LOG(log_note, logtype_afpd, "ipc_reconnect_handler: got SIGQUIT, trying IPC reconnect");
+
+    if (reconnect_ipc(AFPobj) != 0) {
+        LOG(log_error, logtype_afpd, "ipc_reconnect_handler: failed IPC reconnect");
+        afp_dsi_close(AFPobj);
+        exit(EXITERR_SYS);        
+    }
+
+    LOG(log_note, logtype_afpd, "ipc_reconnect_handler: resending client ID");
+    if (ipc_child_write(AFPobj->ipc_fd, IPC_GETSESSION, AFPobj->sinfo.clientid_len, AFPobj->sinfo.clientid) != 0) {
+        LOG(log_error, logtype_afpd, "ipc_reconnect_handler: failed IPC ID resend");
+        afp_dsi_close(AFPobj);
+        exit(EXITERR_SYS);        
+    }
+    LOG(log_note, logtype_afpd, "ipc_reconnect_handler: done");
+}
+
 /* SIGURG handler (primary reconnect) */
 static void afp_dsi_transfer_session(int sig _U_)
 {
@@ -361,28 +383,20 @@ void afp_over_dsi(AFPObj *obj)
     u_int32_t err, cmd;
     u_int8_t function;
     struct sigaction action;
-    struct pollfd pollfds[1];
 
     AFPobj = obj;
+    dsi->AFPobj = obj;
     obj->exit = afp_dsi_die;
     obj->reply = (int (*)()) dsi_cmdreply;
     obj->attention = (int (*)(void *, AFPUserBytes)) dsi_attention;
     dsi->tickle = 0;
 
-    pollfds[0].fd = obj->ipc_fd;
-    pollfds[0].events = POLLOUT;
-
     memset(&action, 0, sizeof(action));
+    sigfillset(&action.sa_mask);
+    action.sa_flags = SA_RESTART;
 
     /* install SIGHUP */
     action.sa_handler = afp_dsi_reload;
-    sigemptyset( &action.sa_mask );
-    sigaddset(&action.sa_mask, SIGALRM);
-    sigaddset(&action.sa_mask, SIGTERM);
-    sigaddset(&action.sa_mask, SIGUSR1);
-    sigaddset(&action.sa_mask, SIGINT);
-    sigaddset(&action.sa_mask, SIGUSR2);
-    action.sa_flags = SA_RESTART;
     if ( sigaction( SIGHUP, &action, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
         afp_dsi_die(EXITERR_SYS);
@@ -390,13 +404,6 @@ void afp_over_dsi(AFPObj *obj)
 
     /* install SIGURG */
     action.sa_handler = afp_dsi_transfer_session;
-    sigemptyset( &action.sa_mask );
-    sigaddset(&action.sa_mask, SIGALRM);
-    sigaddset(&action.sa_mask, SIGTERM);
-    sigaddset(&action.sa_mask, SIGUSR1);
-    sigaddset(&action.sa_mask, SIGINT);
-    sigaddset(&action.sa_mask, SIGUSR2);
-    action.sa_flags = SA_RESTART;
     if ( sigaction( SIGURG, &action, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
         afp_dsi_die(EXITERR_SYS);
@@ -404,27 +411,20 @@ void afp_over_dsi(AFPObj *obj)
 
     /* install SIGTERM */
     action.sa_handler = afp_dsi_die;
-    sigemptyset( &action.sa_mask );
-    sigaddset(&action.sa_mask, SIGALRM);
-    sigaddset(&action.sa_mask, SIGHUP);
-    sigaddset(&action.sa_mask, SIGUSR1);
-    sigaddset(&action.sa_mask, SIGINT);
-    sigaddset(&action.sa_mask, SIGUSR2);
-    action.sa_flags = SA_RESTART;
     if ( sigaction( SIGTERM, &action, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
         afp_dsi_die(EXITERR_SYS);
     }
 
-    /* Added for server message support */
+    /* install SIGQUIT */
+    action.sa_handler = ipc_reconnect_handler;
+    if ( sigaction(SIGQUIT, &action, NULL ) < 0 ) {
+        LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+        afp_dsi_die(EXITERR_SYS);
+    }
+
+    /* SIGUSR2 - server message support */
     action.sa_handler = afp_dsi_getmesg;
-    sigemptyset( &action.sa_mask );
-    sigaddset(&action.sa_mask, SIGALRM);
-    sigaddset(&action.sa_mask, SIGTERM);
-    sigaddset(&action.sa_mask, SIGUSR1);
-    sigaddset(&action.sa_mask, SIGHUP);
-    sigaddset(&action.sa_mask, SIGINT);
-    action.sa_flags = SA_RESTART;
     if ( sigaction( SIGUSR2, &action, NULL) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
         afp_dsi_die(EXITERR_SYS);
@@ -432,12 +432,6 @@ void afp_over_dsi(AFPObj *obj)
 
     /*  SIGUSR1 - set down in 5 minutes  */
     action.sa_handler = afp_dsi_timedown;
-    sigemptyset( &action.sa_mask );
-    sigaddset(&action.sa_mask, SIGALRM);
-    sigaddset(&action.sa_mask, SIGHUP);
-    sigaddset(&action.sa_mask, SIGTERM);
-    sigaddset(&action.sa_mask, SIGINT);
-    sigaddset(&action.sa_mask, SIGUSR2);
     action.sa_flags = SA_RESTART;
     if ( sigaction( SIGUSR1, &action, NULL) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
@@ -446,23 +440,14 @@ void afp_over_dsi(AFPObj *obj)
 
     /*  SIGINT - enable max_debug LOGging to /tmp/afpd.PID.XXXXXX */
     action.sa_handler = afp_dsi_debug;
-    sigfillset( &action.sa_mask );
-    action.sa_flags = SA_RESTART;
     if ( sigaction( SIGINT, &action, NULL) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
         afp_dsi_die(EXITERR_SYS);
     }
 
 #ifndef DEBUGGING
-    /* tickle handler */
+    /* SIGALRM - tickle handler */
     action.sa_handler = alarm_handler;
-    sigemptyset(&action.sa_mask);
-    sigaddset(&action.sa_mask, SIGHUP);
-    sigaddset(&action.sa_mask, SIGTERM);
-    sigaddset(&action.sa_mask, SIGUSR1);
-    sigaddset(&action.sa_mask, SIGINT);
-    sigaddset(&action.sa_mask, SIGUSR2);
-    action.sa_flags = SA_RESTART;
     if ((sigaction(SIGALRM, &action, NULL) < 0) ||
             (setitimer(ITIMER_REAL, &dsi->timer, NULL) < 0)) {
         afp_dsi_die(EXITERR_SYS);
@@ -523,23 +508,6 @@ void afp_over_dsi(AFPObj *obj)
                        * or a primary reconnect succeeds  */
         }
 
-        static int saved_ipcfd = -1;
-        if (saved_ipcfd == -1)
-            saved_ipcfd = obj->ipc_fd;
-        if (poll(pollfds, 1, 0) == 1) {
-            if (pollfds[0].revents & (POLLHUP | POLLERR)) {
-                if (saved_ipcfd == obj->ipc_fd && getppid() == 1) {
-                    close(obj->ipc_fd);
-                    sleep(30);  /* give it enough time to start */
-                    if ((obj->ipc_fd = ipc_client_uds(_PATH_AFP_IPC)) == -1) {
-                        LOG(log_error, logtype_afpd, "afp_over_dsi: cant reconnect to master");
-                        afp_dsi_die(EXITERR_SYS);
-                    }
-                }
-            }
-        }
-
-
         if (!(dsi->flags & DSI_EXTSLEEP) && (dsi->flags & DSI_SLEEPING)) {
             LOG(log_debug, logtype_afpd, "afp_over_dsi: got data, ending normal sleep");
             dsi->flags &= ~DSI_SLEEPING;