[linux-cifs-client] Re: dfs path construction fixup for / character in \\server\share component of dfs path

[Jeremy Allison]

On Thu, Apr 24, 2008 at 12:04:06PM +0400, Igor Mammedov wrote:

> I'm doing the second call with a short path to get inode info
> including server generated inode number. If not for the last 
> then second call could be omitted and inode be filled with fake
> values and locally generated ino.
> 
> PS:
> Windows server does not object against the second call and returns
> info on the dfs junction point (as directory). 
> More uniform behavior between different implementations would be
> better for all.

Can you try this patch against the 3.2 code please. It should
cause smbd to return a directory on the short QFILEINFO call.

Jeremy.
-------------- next part --------------
diff --git a/source/smbd/trans2.c b/source/smbd/trans2.c
index 709eb39..74b167b 100644
--- a/source/smbd/trans2.c
+++ b/source/smbd/trans2.c
@@ -3768,6 +3768,28 @@ static void call_trans2qpipeinfo(connection_struct *conn,
 }
 
 /****************************************************************************
+ Needed to show the msdfs symlinks as directories. Modified psbuf
+ to be a directory.
+****************************************************************************/
+
+static bool check_msdfs_link(connection_struct *conn,
+				const char *pathname,
+				SMB_STRUCT_STAT *psbuf)
+{
+	if(lp_host_msdfs() &&
+		lp_msdfs_root(SNUM(conn)) &&
+		is_msdfs_link(conn, pathname, psbuf)) {
+
+		DEBUG(5,("check_msdfs_link: Masquerading msdfs link %s "
+			"as a directory\n",
+			pathname));
+		psbuf->st_mode = (psbuf->st_mode & 0xFFF) | S_IFDIR;
+		return true;
+	}
+	return false;
+}
+
+/****************************************************************************
  Reply to a TRANS2_QFILEPATHINFO or TRANSACT2_QFILEINFO (query file info by
  file name or file id).
 ****************************************************************************/
@@ -3806,6 +3828,7 @@ static void call_trans2qfilepathinfo(connection_struct *conn,
 	struct ea_list *ea_list = NULL;
 	uint32 access_mask = 0x12019F; /* Default - GENERIC_EXECUTE mapping from Windows */
 	char *lock_data = NULL;
+	bool ms_dfs_link = false;
 	TALLOC_CTX *ctx = talloc_tos();
 
 	if (!params) {
@@ -3959,10 +3982,20 @@ static void call_trans2qfilepathinfo(connection_struct *conn,
 				reply_unixerror(req, ERRDOS, ERRbadpath);
 				return;
 			}
+
+			ms_dfs_link = check_msdfs_link(conn,fname,&sbuf);
+
 		} else if (!VALID_STAT(sbuf) && SMB_VFS_STAT(conn,fname,&sbuf) && (info_level != SMB_INFO_IS_NAME_VALID)) {
-			DEBUG(3,("call_trans2qfilepathinfo: SMB_VFS_STAT of %s failed (%s)\n",fname,strerror(errno)));
-			reply_unixerror(req, ERRDOS, ERRbadpath);
-			return;
+			int saved_errno = errno;
+
+			ms_dfs_link = check_msdfs_link(conn,fname,&sbuf);
+
+			if (!ms_dfs_link) {
+				errno = saved_errno;
+				DEBUG(3,("call_trans2qfilepathinfo: SMB_VFS_STAT of %s failed (%s)\n",fname,strerror(errno)));
+				reply_unixerror(req, ERRDOS, ERRbadpath);
+				return;
+			}
 		}
 
 		fileid = vfs_file_id_from_sbuf(conn, &sbuf);
@@ -3987,7 +4020,11 @@ static void call_trans2qfilepathinfo(connection_struct *conn,
 	else
 		base_name = p+1;
 
-	mode = dos_mode(conn,fname,&sbuf);
+	if (ms_dfs_link) {
+		mode = dos_mode_msdfs(conn,fname,&sbuf);
+	} else {
+		mode = dos_mode(conn,fname,&sbuf);
+	}
 	if (!mode)
 		mode = FILE_ATTRIBUTE_NORMAL;