smb: client: ignore unhandled reparse tags

Just ignore reparse points that the client can't parse rather than
bailing out and not opening the file or directory.

Reported-by: Marc <[email protected]>
Closes: https://lore.kernel.org/r/CAMHwNVv-B+Q6wa0FEXrAuzdchzcJRsPKDDRrNaYZJd6X-+iJzw@mail.gmail.com
Fixes: 539aad7 ("smb: client: introduce ->parse_reparse_point()")
Tested-by: Anthony Nandaa (Microsoft) <[email protected]>
Signed-off-by: Paulo Alcantara (Red Hat) <[email protected]>
Signed-off-by: Steve French <[email protected]>

Author: Paulo Alcantara

fs/smb/client/reparse.c

@@ -378,6 +378,8 @@ int parse_reparse_point(struct reparse_data_buffer *buf,
 			u32 plen, struct cifs_sb_info *cifs_sb,
 			bool unicode, struct cifs_open_info_data *data)
 {
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+
 	data->reparse.buf = buf;
 
 	/* See MS-FSCC 2.1.2 */
@@ -394,12 +396,13 @@ int parse_reparse_point(struct reparse_data_buffer *buf,
 	case IO_REPARSE_TAG_LX_FIFO:
 	case IO_REPARSE_TAG_LX_CHR:
 	case IO_REPARSE_TAG_LX_BLK:
-		return 0;
+		break;
 	default:
-		cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
-			 __func__, le32_to_cpu(buf->ReparseTag));
-		return -EOPNOTSUPP;
+		cifs_tcon_dbg(VFS | ONCE, "unhandled reparse tag: 0x%08x\n",
+			      le32_to_cpu(buf->ReparseTag));
+		break;
 	}
+	return 0;
 }
 
 int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,