Merge v6.12.26linux-rolling-lts

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c
index bd791aa54681..55cceb822932 100644
--- a/fs/smb/client/smb1ops.c
+++ b/fs/smb/client/smb1ops.c
@@ -597,6 +597,42 @@ static int cifs_query_path_info(const unsigned int xid,
 			CIFSSMBClose(xid, tcon, fid.netfid);
 	}
 
+#ifdef CONFIG_CIFS_XATTR
+	/*
+	 * For WSL CHR and BLK reparse points it is required to fetch
+	 * EA $LXDEV which contains major and minor device numbers.
+	 */
+	if (!rc && data->reparse_point) {
+		struct smb2_file_full_ea_info *ea;
+
+		ea = (struct smb2_file_full_ea_info *)data->wsl.eas;
+		rc = CIFSSMBQAllEAs(xid, tcon, full_path, SMB2_WSL_XATTR_DEV,
+				    &ea->ea_data[SMB2_WSL_XATTR_NAME_LEN + 1],
+				    SMB2_WSL_XATTR_DEV_SIZE, cifs_sb);
+		if (rc == SMB2_WSL_XATTR_DEV_SIZE) {
+			ea->next_entry_offset = cpu_to_le32(0);
+			ea->flags = 0;
+			ea->ea_name_length = SMB2_WSL_XATTR_NAME_LEN;
+			ea->ea_value_length = cpu_to_le16(SMB2_WSL_XATTR_DEV_SIZE);
+			memcpy(&ea->ea_data[0], SMB2_WSL_XATTR_DEV, SMB2_WSL_XATTR_NAME_LEN + 1);
+			data->wsl.eas_len = sizeof(*ea) + SMB2_WSL_XATTR_NAME_LEN + 1 +
+					    SMB2_WSL_XATTR_DEV_SIZE;
+			rc = 0;
+		} else if (rc >= 0) {
+			/* It is an error if EA $LXDEV has wrong size. */
+			rc = -EINVAL;
+		} else {
+			/*
+			 * In all other cases ignore error if fetching
+			 * of EA $LXDEV failed. It is needed only for
+			 * WSL CHR and BLK reparse points and wsl_to_fattr()
+			 * handle the case when EA is missing.
+			 */
+			rc = 0;
+		}
+	}
+#endif
+
 	return rc;
 }