r18011: Should fix bug 3835.

Jeremy: requires your eyes...

If the remote connection timed out while cli_list() was retrieving its list of
files, the error was not returned to the user, e.g. via smbc_opendir(), so the
user didn't have a way to know to set the timeout longer and try again.  This
problem would occur when a very large directory is being read with a too-small
timeout on the cli.

Jeremy, although there were a couple of areas that needed to be handled, I
needed to make one change that you should bless, in libsmb/clientgen.c.  It
was setting

  cli->smb_rw_error = smb_read_error;

but smb_read_error is zero, so this had no effect.  I'm now doing

  cli->smb_rw_error = READ_TIMEOUT;

instead, and according to the OP, these (cumulative) changes (in a slightly
different form) solve the problem.

Please confirm this smb_rw_error change will have no other adverse effects
that you can see.

Derrell
(This used to be commit fa664b24b829f973156486896575c1007b6d7b01)

3 files changed, 41 insertions, 11 deletions

diff --git a/source3/libsmb/clientgen.c b/source3/libsmb/clientgen.c
index 4608d40d46..3a84a5bd4d 100644
--- a/source3/libsmb/clientgen.c
+++ b/source3/libsmb/clientgen.c
@@ -79,7 +79,6 @@ static BOOL client_receive_smb(int fd,char *buffer, unsigned int timeout)
 
 BOOL cli_receive_smb(struct cli_state *cli)
 {
-	extern int smb_read_error;
 	BOOL ret;
 
 	/* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
@@ -107,9 +106,9 @@ BOOL cli_receive_smb(struct cli_state *cli)
 	}
 
 	/* If the server is not responding, note that now */
-
 	if (!ret) {
-		cli->smb_rw_error = smb_read_error;
+                DEBUG(0, ("Receiving SMB: Server stopped responding\n"));
+		cli->smb_rw_error = READ_TIMEOUT;
 		close(cli->fd);
 		cli->fd = -1;
 		return ret;
diff --git a/source3/libsmb/clilist.c b/source3/libsmb/clilist.c
index 18c058f9df..22cb5930c2 100644
--- a/source3/libsmb/clilist.c
+++ b/source3/libsmb/clilist.c
@@ -349,10 +349,17 @@ int cli_list_new(struct cli_state *cli,const char *Mask,uint16 attribute,
 
 	mnt = cli_cm_get_mntpoint( cli );
 
-	for (p=dirlist,i=0;i<total_received;i++) {
-		p += interpret_long_filename(cli,info_level,p,&finfo,NULL,NULL,NULL);
-		fn( mnt,&finfo, Mask, state );
-	}
+        /* see if the server disconnected or the connection otherwise failed */
+        if (cli_is_error(cli)) {
+                total_received = -1;
+        } else {
+                /* no connection problem.  let user function add each entry */
+                for (p=dirlist,i=0;i<total_received;i++) {
+                        p += interpret_long_filename(cli, info_level, p,
+                                                     &finfo,NULL,NULL,NULL);
+                        fn( mnt,&finfo, Mask, state );
+                }
+        }
 
 	/* free up the dirlist buffer and last name raw blob */
 	SAFE_FREE(dirlist);
diff --git a/source3/libsmb/libsmbclient.c b/source3/libsmb/libsmbclient.c
index c74e18b13c..101cc02211 100644
--- a/source3/libsmb/libsmbclient.c
+++ b/source3/libsmb/libsmbclient.c
@@ -2540,6 +2540,7 @@ static SMBCFILE *
 smbc_opendir_ctx(SMBCCTX *context,
                  const char *fname)
 {
+        int saved_errno;
 	fstring server, share, user, password, options;
 	pstring workgroup;
 	pstring path;
@@ -2547,6 +2548,7 @@ smbc_opendir_ctx(SMBCCTX *context,
         char *p;
 	SMBCSRV *srv  = NULL;
 	SMBCFILE *dir = NULL;
+        struct _smbc_callbacks *cb;
 	struct in_addr rem_ip;
 
 	if (!context || !context->internal ||
@@ -2908,9 +2910,9 @@ smbc_opendir_ctx(SMBCCTX *context,
 					SAFE_FREE(dir->fname);
 					SAFE_FREE(dir);
 				}
-				errno = smbc_errno(context, targetcli);
+				saved_errno = smbc_errno(context, targetcli);
 
-                                if (errno == EINVAL) {
+                                if (saved_errno == EINVAL) {
                                     /*
                                      * See if they asked to opendir something
                                      * other than a directory.  If so, the
@@ -2926,12 +2928,34 @@ smbc_opendir_ctx(SMBCCTX *context,
                                         ! IS_DOS_DIR(mode)) {
 
                                         /* It is.  Correct the error value */
-                                        errno = ENOTDIR;
+                                        saved_errno = ENOTDIR;
                                     }
                                 }
 
-				return NULL;
+                                /*
+                                 * If there was an error and the server is no
+                                 * good any more...
+                                 */
+                                cb = &context->callbacks;
+                                if (cli_is_error(targetcli) &&
+                                    cb->check_server_fn(context, srv)) {
+
+                                    /* ... then remove it. */
+                                    if (cb->remove_unused_server_fn(context,
+                                                                    srv)) { 
+                                        /*
+                                         * We could not remove the server
+                                         * completely, remove it from the
+                                         * cache so we will not get it
+                                         * again. It will be removed when the
+                                         * last file/dir is closed.
+                                         */
+                                        cb->remove_cached_srv_fn(context, srv);
+                                    }
+                                }
 
+                                errno = saved_errno;
+				return NULL;
 			}
 		}